GT3U (GT-3U) combined into STU, removed from GRAND TOURING (letter #39862)
Wording removed by a change is shown struck through, as in the original. 112 changes, 288 other letters.
Changes made
Wheel and tire requirements for GT3U
#40679 from Robert Maples · Rule change · TB 26-09 (2026-09 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, STU-GT3U, change Notes as follows: "All GT3U (Majors and Runoffs) cars using up to 15”x7” wheels limited to 225 section width tires shall run at current GT3 race weight plus 275lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed optional 15”x9” wheels with a 1.5% weight addition or up to 18”x9” wheels with a 3.0% weight addition to the total weight including the 275 lbs Increase the minimum weight of all GT3/GT3U 2.0 liter unrestricted engines to +75 lbs. All GT3 cars running in STU must meet the minimum ride height of 3.0” for the main frame rails not including rub blocks and a 2” minimum for the front spoiler and splitter. 1. Wheel and tire requirements for GT3U
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a. Cars using up to 15”x7” wheels and up to a 225 section width DOT approved tires shall run at current GT3 race weight plus 275lbs. b. Cars using 15”x9” wheels and 245 section width DOT approved tires shall run at current GT3 race weight plus 275 lbs plus 1.5%. c. Cars using 16, 17, 18” x9” wheels and 245 section width DOT approved tires shall run at current GT3 race weight plus 275 lbs plus 3.0%. 2. The minimum weight of all GT3/GT3U 2.0 liter unrestricted engines plus 275lbs, plus 75lbs. 3. All GT3 cars running in STU must meet the minimum ride height of 3.0” for the main frame rails not including rub blocks and a 2” minimum for the front spoiler and splitter."
A specification table follows in the original; it is not shown here.
9” Wheels
#40433 from John Weisberg · Rule change · TB 26-07 (2026-07 Fastrack)
In GCR, Section 9.1.4.1.F.1., change as follows: "Wheels may not exceed 18 inches in diameter. Cars equal to or less than 2,850 2,825 lbs. minimum allowed race weight may not use wheels wider than 8 inches. Cars greater than 2,850 2,825 lbs. minimum allowed race weight may not use wheels wider than 9 inches."
Weight adjustment to former GT3U cars
#40474 from Super Touring Committee · Rule change · TB 26-07 (2026-07 Fastrack)
In STU Spec Lines, STU-GT3U, GT3U, change Minimum Weight as follows: "Current GT3 race weight plus 225 275 pounds" In STU Spec Lines, STU-GT3U, GT3U, change Notes as follows: "All GT3U (Majors and Runoffs) cars using up to 15”x7” wheels limited to 225 section width tires shall run at current GT3 race weight plus 225 275lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed optional 15”x9” wheels with a 1.5% weight addition or up to 18”x9” wheels with a 3.0% weight addition to the total weight including the 225 275lbs Increase the minimum weight of all GT3/GT3U 2.0 liter unrestricted engines to +75 lbs. All GT3 cars running in STU must meet the minimum ride height of 3.0” for the main frame rails not including rub blocks and a 2” minimum
In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, classify the following: Make: "BMW M50B20TU" Maximum Displacement: "1991" Minimum Weight: "Chart" Notes: "Must meet all STU engine regulations."
Calculating Weight
#40224 from David Wessel · Rule change · TB 26-06 (2026-06 Fastrack)
In GCR, Section 9.1.4.1.H.6., change as follows: "The minimum weight is determined by the installed engine displacement, TIR or table spec line. It is to be used as the base weight for any chassis weight related adjustments. Chassis related All positive adjustments that are percentage based are performed by adding the total of all specified percentages first and subtracting the total of all negative specified percentages second if necessar y. Final step is addition or subtraction of specified weight in pounds." In GCR, Section 9.1.4.2.H.4., change as follows: "The minimum weight is determined by the installed engine displacement or table spec line. It is to be used as the base weight for any chassis weight related adjustments. Chassis related All positive adjustments that are percentage based are performed by
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adding the total of all specified percentages first and subtracting the total of all negative specified percentages second if necessary. Final step is addition or subtraction of specified weight in pounds."
Turbo Restrictor Size Increase Request
#40008 from Peter St Pierre · Rule change · TB 26-05 (2026-05 Fastrack)
In STU Spec Lines, Table A: Alternate Vehicle and Engine Requirements, Honda K20C1 Turbo I4, change Notes as follows: "35 36mm TIR required."
GT86 Cups Car in STU
#40028 from Peter Federlin · Rule change · TB 26-05 (2026-05 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Notes as follows: "Must meet all 2022 Toyota GR Cup rules, including tires or DOT tires conforming to section 9.1.4.O with a maximum section
A specification table follows in the original; it is not shown here.
In STU Table B: Alternate Vehicle and Engine Allowances, add the following: Model: "Mazda Renesis Street Port" Maximum Displacement (cc's): "N/A" Minimum Weight: "2450" Notes: "Street porting allowed. Alternate 70mm choke throttle body from the following list allowed: OE from 1996- 2004 Mustang 4.6 liter V8; BBK #1700 (e.g., Summit #BBK-1700); Summit #227204; Trickflow #24070 1” thickness max manifold adapter allowed."
Eliminate 33 and 34 mm TIRs
#39872 from Super Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)
#39767 from Marc Hoover · Rule change · TB 26-03 (2026-03 Fastrack)
In STU Spec Lines, Table A: Alternate Vehicle and Engine Requirements, Mazda MZR (LF, L3, L5), add to Notes as follows: "Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Goodwin Part # 61-2510, Gato Performance Part #31972, or Jack Spania Racing 70 mm sheet-metal aluminum or Fab 9 Elite NC MX5 Performance Intake manifold. Must use stock throttle body or Acura part number 16400-PND-A17."
Request for Permission on Aftermarket Turbo Kit and Intake
#39529 from John Grim · Rule change · TB 26-01 (2026-01 Fastrack)
In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, Mazda MZR (LF, L3, L5), change Notes as follows: "Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Goodwin Part # 61- 2510 or, Gato Performance Part #31972 or Jack Spania Racing 70 mm sheet-metal aluminum Intake manifold. Must use stock throttle body or Acura part number 16400-PND-A17." In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, classify Mazda MZR (LF, L3, L5) Turbo as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda MZR (LF, L3, L5) Turbo
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Varies Chart Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Jack Spania Racing 70 mm sheet-metal aluminum Intake manifold. Must use stock throttle body or Acura part number 16400-PND- A17. Fab9 Tuning bottom-mount turbo kit approved with one of the STU approved Turbos.
Turbo Inlet Restrictor Table
#38961 from John Weisberg · Rule change · TB 25-12 (2025-12 Fastrack)
In GCR, Section 9.1.4.H.3, change chart as follows:
A specification table follows in the original; it is not shown here.
275 Tire Rule
#38983 from Peter Federlin · Rule change · TB 25-12 (2025-12 Fastrack)
In GCR, Section 9.1.4.G.1., change as follows: "A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."
STU Honda Engine weight penalty
#39375 from Super Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Minimum Weight as follows: Honda K20: "Chart + 2%" Honda K24: "Chart + 2%"
#38746 from William Rori · Rule change · TB 25-09 (2025-09 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, Honda K24, change Weight as follows: "(Effective 11/1/2025) Chart + 2%"
Lotus Weight Reduction E&O
#38919 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)
In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows: Lotus Elise SC/ Lotus Exige SC: "2450 2250"
STU-TCR Adjustments
#38723 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)
In STU Spec Lines, Table C: STU-GT3U, GT3-TCR, change as follows: Remove the current TCR spec line and add the TCR spec lines from GT3 that are being removed, adding the below to the notes. "DOT approved tire with maximum section width of 245. May run DOT approved tire with maximum section width of 275 with 100 150 pound weight adder. May not run A-compound with 275. STU-TCR spitters and side valance must comply with 9.1.4.D.3.f. STU-TCR chassis ride height must comply with 9.1.4.1.A.1."
Lotus Weight Reduction
#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)
In 9.1.2. GT2/ST Spec Lines, Lotus Evora GT4, change Weight as follows: "2750 2700" In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows: Lotus Elise Cup R: "2300 2250" Lotus Elise SC/ Lotus Exige SC: "2300 2550 2500 2450"
2.8-3.2L N/A Engine Allowances
#38007 from Ben Slechta · Rule change · TB 25-07 (2025-07 Fastrack)
In GCR, Section 9.1.4.G.1, add the following: "A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."
2006-2015 Mazda Miata Intake Manifold
#38422 from German Candelario Candelario · Rule change · TB 25-07 (2025-07 Fastrack)
In STU, Table A, Mazda MZR (LF, L3, L5), change Notes as follows: "May use Goodwin Part # 61-2510 or Gato Performance Part #31972 Intake manifold . "
Requesting Approval of the JDM Honda h23a
#38489 from Eric Fiest · Rule change · TB 25-07 (2025-07 Fastrack)
In STU, Table B, classify Honda JDM H23a as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Honda JDM H23a 2259 Chart Must meet all ST engine regulations.
Wheel Size Inconsistency
#38018 from David Fiorelli · Rule change · TB 25-05 (2025-05 Fastrack)
In GCR, Section 9.1.4.1.F.1., change as follows: "Wheels may not exceed 18 inches in diameter. or 8.0 inches in width for vehicles 2950 lbs. and under minimum allowed race weight. Vehicles over 2850 minimum allowed race weight may use a 9 inch wide wheel. Cars equal to or less than 2,850 lbs. minimum allowed race weight may not use wheels wider than 8 inches. Cars greater than 2,850 lbs. minimum allowed race weight may not use wheels wider than 9 inches."
Table C: STU-GT3U Clarification
#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)
In STU Spec Line, Table C: STU-GT3U, change as follows: Minimum Weight: “Current GT3 race weight plus 250 225 pounds” Notes: "DOT approved tire with maximum section width of 245. GT3 cars base wheel is a maximum of 15”x9”. 18”x9” wheels allowd with a 3% weight addition. GT3 cars utilizing 15”x7” wheels are limited to a maximum section width of 225 with a 25 pound weight reduction" "All GT3U (Majors and Runoffs) cars using up to 15"x7" wheels limited to 225 section width tires shall run at current GT3 race weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed optional 15"x9" wheels with a 1.5% weight addition or up to 18"x9" wheels with a 3.0% weight addition to the total weight
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including the 225 lbs."
BMW N54/N55 Engine Allowance Follow Up
#37447 from Martin Sarukhanyan · Rule change · TB 25-03 (2025-03 Fastrack)
In STU Spec Lines, Table A, classify BMW N54/N55 as follows: STU Maximum Displacement (cc's) Minimum Weight Notes BMW N54/N55 3.0 Chart +3% (DI) Short blocks, heads, and intakes may be freely swapped within these engine designations. N54 twin turbo not allowed
STU Mini Cooper pulley size clarification re: letter #36980
In STU Spec Lines, Mini Cooper S SC, add to notes: 2100: "May run a 2.285 2.185 diameter pulley."
Question About a Weight Modifier
#37782 from Peter St Pierre · Rule change · TB 25-03 (2025-03 Fastrack)
In STU Spec Lines, Table A, Honda K20C1 Turbo I4, add to Notes the following: "The 3% DI weight adder does not need to be applied."
Increase Minimum Weight
#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)
In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows: "150 250 pounds"
Audi 1.8t Wagon STU Table B
#36685 from Mike McLaughlin · Rule change · TB 25-01 (2025-01 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, delete Audi/VW 1.8 Turbo in its entirety. In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, Porsche 944 w/Max Displacement 1800, change as follows: Weight: "3050 Chart" Notes: "VW/Audi 1.8L 35mm turbo engine permittedinlet restrictor required."
Merger GT3 to STU
#37486 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)
In STU, Table C, change STU-GT3 charge as follows: "(Effective January 1, 2026) TABLE C: STU-GT3U"
GT3 TCR Tire allowance
#37494 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)
In STU, Table C, GT3 TCR, add to Notes the following: "May run DOT approved tire with maximum section width of 275 with 100 pound weight adder. May not run A compound with 275."
Request to Remove Miata Hubs from General category
#37138 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)
In GCR, Section 9.1.4.M.18., change as follows: "18. Allow alternate front wheel front hubs, Mazda Motorsports Development Part #0000-04-5HUB-S1, for the 90-05 Mazda Miata: Mazda Motorsports Development Part #0000-04-5HUB-S1."
BMW N54/N55 Engine Allowance
#37146 from Martin Sarukhanyan · Rule change · TB 24-12 (2024-12 Fastrack)
"Turbo inlet restrictors designed per GCR Appendix F Technical Glossary definition of “Turbo Inlet Restrictor” may be required; see table 9.1.4.1.H.h.2 3. Swapping of turbochargers between engine makes and models is prohibited. Supercharged cars may be approved on a case-by-case basis; twin turbo engines are allowed on a case-by-case basis only. Contact the Road Racing Technical Office for details. Twin turbo engines may be converted to single turbo using one of the allowed alternate turbos (see 9.1.4.1.H.3 2). Aftermarket turbocharger and supercharger kits will be allowed on a case-by-case basis.
In STU Spec Lines, Mini Cooper S SC, add to notes: 1900: "Stock supercharger pulley. 2.565 diameter." 2100: "JCW Pulley permitted. May run a 2.285 diameter pulley."
RWD Turbo Disadvantage
#36255 from David Fiorelli · Rule change · TB 24-08 (2024-08 Fastrack)
In GCR, Section 9.1.4.1.H.3 - Inlet Restrictor (mm) Minimum Weight (lbs) table, change as follows: "RWD cars must reduce restrictor 1 mm from this table"
In STU Spec Lines, Mini Cooper S SC with Minimum Weight 1900 and 2100, add to Notes: "Alternate LEAP OMICRON hood scoop part # LEP-OMICRON3 is permitted."
In STU Spec Lines, BMW S54 B32 OEM, add to Notes as follows: "Dry Sump oiling system permitted."
ST Electric-Assisted Steering Systems
#35066 from Jose Osiris Pena · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR, Section 9.1.4.M.16., change as follows: "Power steering may be modified in any of the following ways: a. disconnected , pump, belt, pulley, and hoses may be removed. Hoses may also be looped. Steering rack or box may be modified internally to work without pump. b. an OEM manual steering rack for that model may be fitted c. an electric power steering pump may be fitted d. an OEM electric-assisted steering system may be used or any column mounted electric steering assist may be used e. an OEM hydraulic-assisted steering system may be used"
2022 Toyota GR Cup for STU
#34449 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)
In STU Spec Lines, Toyota GR Cup (2022-), classify as follows:
A specification table follows in the original; it is not shown here.
In STU Spec lines, classify Mazda BP5A as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda BP5A 1839 Chart May use engine in its entirety or specific components from the engine.
E&O STU NA Weight Chart.
#33737 from Eric Heinrich · Rule change · TB 23-03 (2023-03 Fastrack)
#32668 from Raymond Philibert · Rule change · TB 22-08 (2022-08 Fastrack)
In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowance, classify Mazda 13 B Turbo as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda 13B Turbo N/A Chart Limited to Streetport only. Stock turbos are not allowed; only alternative turbos listed in the STU rules are allowed.
Hood Vents and Intercooler Scoops
#32733 from Patrick Lipsinic · Rule change · TB 22-08 (2022-08 Fastrack)
In STU, GCR section 9.1.4.1.A.2., add as follows: "Louver vents that are OEM do not count in the number of vents allowed or 200 square inch allowance."
In STU Specifications, GCR Section 9.1.4.1.H.1., change Chart as follows: "Factory Engine Displacement (cc) - 2400 Minimum Weight (lbs) - 2596 2595" In STU Specifications, GCR Section 9.1.4.1.H.1., add the following: "Normally-aspirated engines of fewer than 4 valves per cylinder may reduce base engine weight 9%." In STU Specifications, GCR Section 9.1.4.1.H., remove the following and renumber: "4. All Direct Injected (DI) Turbocharged engines will be limited in preparation. DI Turbo engines must use OEM compression ratios, OEM camshaft lift, and may not port the cylinder head."
Error in new minimum weight table when combined with other text
#32711 from Super Touring Committee · Rule change · TB 22-07 (2022-07 Fastrack)
In STU Specifications, GCR Section 9.1.4.1.H., eliminate the following in its entirety and renumber: "2. Normally-aspirated engines with stock displacement 2976cc-3200cc that breathe through a single throttle body may reduce base engine weight 10%."
Redundant Language in May GCR
#32713 from Super Touring Committee · Rule change · TB 22-07 (2022-07 Fastrack)
In ST, GCR Section 9.1.4.G.29, change as follows: "Any engine balance shafts and associated gears or pulleys may be removed and the resulting openings plugged (including those in oil passages). Alternate pulleys or gears, of the same number as stock, may be installed in the location of the balance shaft pulleys or gears if required for timing belt or chain operation; they must serve no other purpose. Any engine balance shafts and associated gears or pulleys may be removed and the resulting openings plugged (including those in oil passages). Alternate pulleys or gears, of the same number as stock, may be installed in the location of the balance shaft pulleys or gears if required for timing belt or chain operation; they must serve no other purpose."
In STU, GCR Section 9.1.4.1.H, add the following after weight chart: "Any STU car that qualified to run 9 inch wheels in 2021, may continue to run 9 inch wheels thru 2022 only."
Clarification request for GCR 9.1.4.D.3.a Splitter Definition
#32414 from Bill Damron · Rule change · TB 22-05 (2022-04 Fastrack)
In ST Category Specifications, GCR Section 9.1.4.D.3.a, change as follows: "Definition: A horizontal, single-plane aerodynamic device attached to the lower est point of the front of the vehicle, protruding forward. It is intended to divert air and produce downforce through vertical pressure differential. A splitter shall have no vertical deviations."
Request Adjustment to Min Weight for STU BMW E36 M3 (95-99)
In STU Spec Lines, BMW E36 M3 (95-99), change as follows: Car: "BMW E36 M3 (95-99) S52B32" Maximum Displacement: "3200 3152" Weight: "3200 3110" Notes: "Engines are permitted 0.040 overbore, 0.5 point increase in compression. Engines must use the OEM camshaft lift and stock intake plenum. "
BMW E36 M3 Canadian (North American) S50B32 engine
#31866 from Ryan Hameetman · Rule change · TB 22-04 (2022-04 Fastrack)
In STU Spec Lines, BMW S50B32 Euro, classify as follows: STU Maximum Displacement (cc's) Minimum Weight Notes BMW S50B32 Euro 3201 3300 Engines are permitted 0.040 overbore, 0.5 point increase in compression. Engines must use the OEM camshaft. Engine must use stock intake plenum.
Engine Swap Origin Country
#32209 from Jon McLendon · Rule change · TB 22-04 (2022-04 Fastrack)
In ST, GCR Section 9.1.41.G.2., change as follows: Engines from vehicles not available in a car delivered in North America the United States will be considered and approved on a case-by-case basis for use in ST. For an engine to be considered, a member must submit a classification request to the CRB with the following information:
CRX/Civic Del Sol
#32214 from Stephen Wheeler · Rule change · TB 22-04 (2022-04 Fastrack)
In STU, classify Honda CRX (84-91) as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Honda CRX (84-91) Chart Ineligible for front wheel drive weight reductions. In STU, classify Honda Civic Del Sol (93-97) as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Honda Civic Del Sol (93-97)
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Chart Ineligible for front wheel drive weight reductions.
Error correction
#32383 from Super Touring Committee · Rule change · TB 22-04 (2022-04 Fastrack)
In STU, GCR Section 9.1.4.1.F.1, change as follows: "Wheels may not exceed 18 inches in diameter and 8.0 inches in width for vehicles under 2950 lbs. base weight. Vehicles over 2951 with base weight equal to or over 2950 may use a 9 inch wide wheel."
Single TB Weight Modifiers Add to Chart
#32393 from Club Racing Board · Rule change · TB 22-04 (2022-04 Fastrack)
Effective 5.1.2022 In STU, GCR Section 9.1.4.H.1., add to chart as follows: Factory Engine Displacement (cc) Minimum Weight (lbs) 2450 2695 2596 2500 2750 2635 2550 2665 2675
Single TB Weight Modifiers
#31449 from John Weisberg · Rule change · TB 22-03 (2022-03 Fastrack)
Effective 5.1.2022 In STU, GCR Section 9.1.4.H.1., change as follows: "1. Minimum weights for cars with normally aspirated piston engines will be determined by 1.1 lbs/cc displacement for the installed engine (see following table) the following table. Displacement is the stock displacement for the installed engine. For the purpose of weight assignment, engine displacement will be rounded to the nearest 50cc (e.g., 2176cc = 2200cc and 2175cc = 2150cc)." Factory Engine Displacement (cc) Minimum Weight (lbs)
A specification table follows in the original; it is not shown here.
Request to Remove A4 1.8t from STU Spec Line Tables
In STU Table B, Improved Touring Vehicles (1985-), change Notes as follows: "Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels" In STL Table B, ITA-spec and ITS-spec RX7, change Notes as follows: "Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels" In STL Table B, ITS, ITA, ITB, or ITC vehicles (1985- ), change Notes as follows: "Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels"
Request Allowance for Balance Shaft Delete in STU
#31434 from David Fiorelli · Rule change · TB 22-02 (2022-02 Fastrack)
In GCR, Section 9.1.4.G., add as follows" "29. Any engine balance shafts and associated gears or pulleys may be removed and the resulting openings plugged (including those in oil passages). Alternate pulleys or gears, of the same number as stock, may be installed in the location of the balance shaft pulleys or gears if required for timing belt or chain operation; they must serve no other purpose. Any engine balance shafts and associated gears or pulleys may be removed and the resulting openings plugged (including those in oil passages). Alternate pulleys or gears, of the same number as stock, may be installed in the location of the balance shaft pulleys or gears if required for timing belt or chain operation; they must serve no other purpose."
Request Louvers in hood vents
#31916 from David Fiorelli · Rule change · TB 22-02 (2022-02 Fastrack)
In GCR, Section 9.1.4.1 A.2., add as follows: “Louvers within the 200 sq. inch are allowed.”
Request to Add Honda K23 Spec Line
#30682 from David Mead · Rule change · TB 21-08 (2021-08 Fastrack)
In STU, classify Honda K23 as follows, effective 1/1/2022: STU Maximum Displacement (cc's) Minimum Weight Notes Honda K23 2354 Chart May use K24 block. Must maintain all K23 internals. Must use K23 cylinder head. Maximum bore of 87mm.
RE: Aug FT letter 30682
#31060 from David Mead · Rule change · TB 21-09 (2021-09 Fastrack)
In STU, Honda K23, change Notes as follows, effective 1/1/2022: "Must maintain all K23 internals. use K23 crankshaft."
Throttling Device Clarification
#31323 from Jose de Miguel · Rule change · TB 22-01 (2022-01 Fastrack)
In GCR, Section 9.1.4.1.B.4., change as follows: "The intake and exhaust porting on piston engines is free. Porting of intake manifolds and cylinder heads is free on piston engines."
STU Fender flares
#30696 from Patrick Lipsinic · Rule change · TB 21-07 (2021-07 Fastrack)
In STU, Section 9.1.4.1.A.4., change as follows: "The flaring e of the exterior contour of any wheel openings may not change the wheel opening size, location or shape when viewed from the side. The overall vehicle width may not exceed the manufacture's published width, plus 4"."
Request weight reduction for 12A bridgeport motor in Miata
#30751 from christopher harris · Rule change · TB 21-07 (2021-07 Fastrack)
In STU Spec Lines Table B, Mazda 12A Street Port, change Notes as follows "Induction: 1 Nikki 4 barrel carburetor with primary chokes bored to match secondary chokes on a stock manifold, or 1 Auto- type 2 barrel carburetor with 42mm chokes on a "dual-y" manifold." In STU Spec Lines Table B, Mazda 12A Bridge Port, change weight as follows: "2550 2350"
Request for Fender Flare Clarification
#30375 from David Mead · Rule change · TB 21-05 (2021-05 Fastrack)
In STU, section 9.1.4.1.A.4., change as follows: "The exterior contour of all wheel openings Fenders may be flared up to a maximum of 2” per corner with a total 1% weight penalty of 1%. The flare must maintain the OEM profile and appearance, seamlessly around the wheel arch. Material may be added or removed as necessary to create flare. The fender/wheel opening or any other part of the body forming the wheel opening, when viewed from the top perpendicular to the ground, must cover the portion of the tire that contacts the ground while the car is at rest. The flaring of the exterior contour of any wheel openings may not alter the basic body configuration or change the wheel opening size, location or shape when viewed from the side."
Provision for Interchangeable Engine Components Already Allowed
#30342 from Justin Taylor · Rule change · TB 21-04 (2021-04 Fastrack)
In STU Spec Lines, Honda S2000, add to Notes as follows: "F20/F22 K24 Crank Shaft allowed, must use chart weight for achieved displacement."
ST Oil Coolers E&O Correction to 9.1.4.2.H
#30388 from Philip Royle · Rule change · TB 21-04 (2021-04 Fastrack)
In ST, section 9.1.4.G.14, change as follows: "Vents, breathers, and oil filters and oil coolers may be added, or substituted. All emission control devices may be removed and the resulting holes plugged."
Super Touring Alternate Miata Hubs
#30345 from Club Racing Board · Rule change · TB 21-03 (2021-03 Fastrack)
In ST, GCR section 9.1.4.M, add alternate front wheel hubs as follows: "18. Allow alternate front wheel front hubs for the 90-05 Mazda Miata: Mazda Motorsports Development Part #0000-04-5HUB-S1"
Brake Component Relocation
#29990 from Christopher Childs · Rule change · TB 21-02 (2021-02 Fastrack)
In ST, Section 9.1.4.N.1., add the following: "ABS actuation hardware and wiring may be relocated anywhere within the engine compartment."
Porsche PDK
#30081 from Michael Kamalian · Rule change · TB 21-02 (2021-02 Fastrack)
In STU, GCR Section 9.1.4.1.C.2., change as follows: "Transmission and ratios are free. Forward gears are limited to 6 speeds. Cars equipped with automatic transmissions using a torque converter a re limited to 8 forward speeds. Cars with sequential shift transmissions including factory DCT-type systems shall increase the required minimum weight by 3.5%."
Reference Letter #29333 Proposed STU 13B Spec Line Changes
#30086 from Scott Peterson · Rule change · TB 21-02 (2021-02 Fastrack)
In STU, Spec Lines, Mazda 13B Street Port 2400 Min Weight, change Notes as follows: "Allow any dual throttle body/bodies. Chokes must be located within 4” of the throttle butterfly. Auto-type 2bbl choke(s) with any dual-Y manifold. Unrestricted"
Drive Shaft Request
#30087 from Scott Peterson · Rule change · TB 21-02 (2021-02 Fastrack)
In GCR, Section 9.1.4.L.1., change as follows: "Alternate differential housings are permitted from the same model of vehicle. Differential may be open, locked, or of a limited- slip type. The internals of limited-slip type differentials may be modified to change the amount of slip limiting. Differentials with external, or electric, adjustability are prohibited. Driveshaft and half-shafts may be aftermarket, but shall be the OEM-type and use the same types of materials as stock steel or aluminum. Drive shafts may be replaced by one piece drive shafts, and conversely."
13B Rules Adjustment
#29333 from Nick Leverone · Rule change · TB 21-01 (2021-01 Fastrack)
In STU, remove Spec Line in entirety, Mazda 13B, weight 2300. In STU, remove Spec Line in entirety, Mazda 13B Bridge Port, weight 2600. In STU, classify Mazda 13B Street Port as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda 13B Street Port N/A 2400 Allow any dual throttle body/bodies. Chokes must be located within 4” of the throttle butterfly. Auto-type 2bbl choke(s)
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with any dual-Y manifold.
Request clarification on wing measurement
#29640 from Jose De Miguel · Rule change · TB 20-12 (2020-12 Fastrack)
IN ST, GCR Section 9.1.4.D.4.e, add the following: "Unless otherwise specified in the applicable rules the measurement of aero dynamic devices and reference areas shall include end plates but not include fasteners as long as the fasteners serve no other purpose. Fasteners may protrude no more than 1/2” from the mounting surface."
Request for Advanced Aero Rule Wording Clarification.
#29124 from David Mead · Rule change · TB 20-09 (2020-09 Fastrack)
In GCR, Section 9.1.4.1., remove d.: "d. Each fender may be flared to allow for tire clearance up to 2” with a weight penalty of 1%. The flare must maintain the OEM profile and appearance, seamlessly around the wheel arch. Material may be added or removed as necessary to create flare." In GCR, Section 9.1.4.1., add 4. as follows: "4. Fender Flare Fenders may be flared up to 2" per corner with a total weight penalty of 1%. The flare must maintain the OEM profile and appearance, seamlessly around the wheel arch. Material may be added or removed as necessary to create flare."
Minimum Weight Determination
#27695 from David Fiorelli · Rule change · TB 20-08 (2020-08 Fastrack)
In STU, GCR section 9.1.4.10., add the following: "All weight adjustments for engines shall be applied first, then that total is to be used as the baseline for any chassis-related weight adjustments. Chassis related adjustment that are percentage based are performed by adding specified percent first and subtracting specified percentage second if necessary. Final step is addition or subtraction of specified weight in pounds." In STL, GCR Section 9.1.4.4., add the following: "All weight adjustments for engines shall be applied first, then that total is to be used as the baseline for any chassis-related weight adjustments. Chassis related adjustment that are percentage based are
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performed by adding specified percent first and subtracting specified percentage second if necessary. Final step is addition or subtraction of specified weight in pounds."
In GCR section 9.1.4.D.4, clarify wording as follows: "d. Wings shall be a single element with a maximum chord length of 8.50 inches, including any wicker Gurney flap." "f. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be mounted a minimum of 6.0 inches below the peak of the roof or roll cage main hoop whichever is higher, measured at the highest point. Cars with a wagonback/notchback/hatchback style body may have the rear wing assembly, including the end plates and any wicker Gurney flap, mounted a maximum of 4.0inches above the highest point of the roof."
Request for Alternate Intake Manifold
#26514 from Jon McLendon · Rule change · TB 20-07 (2020-08 Fastrack)
Thank you for your letter. This change is not recommended.
Request for Addition to GT3 Approved Turbo List
#27576 from Chris Edens · Rule change · TB 20-07 (2020-08 Fastrack)
In GT3, GCR section 9.1.2.F.7.h.6., add turbocharger as follows: "d. Borg-Warner EFR6258" In STU, GCR section 9.1.4.1.H.5, add turbocharger as follows: "- Borg-Warner EFR6258"
Request BoP for my Car
#29004 from Peter Federlin · Rule change · TB 20-07 (2020-08 Fastrack)
Thank you for the letter. Given the rule set for STU large displacement turbo engines are limited by the turbos allowed in the GCR. We are forced to adhere to this turbo list to maintain parody in the smaller displacement turbo engines. This engine may be more competitive prepared in non-turbo trim in STU or inquire with T1 committee about running turbo trim.
Sequential Shifters in STU
#29031 from Jeff Starkweather · Rule change · TB 20-07 (2020-08 Fastrack)
Thank you for your letter. The Club Racing Board is monitoring performance and adjusting as needed. Recommended Items The following subjects will be referred to the Board of Directors for approval. Address all comments, both for and against, to the Club Racing Board. It is the BoD’s policy to withhold voting on a rules change until there has been input from the membership on the presented rules. Member input is suggested and encouraged. Please send your comments via the form at www.clubracingboard.com.
Rotary Help
#27833 from Nick Leverone · Rule change · TB 20-06 (2020-06 Fastrack)
In STU, Mazda 13B Bridge Port, add Spec Line as follows:
A specification table follows in the original; it is not shown here.
Request to approve Honda S2000 HKS supercharger
#27281 from Matt Spicuzzi · Rule change · TB 20-04 (2020-04 Fastrack)
In STU, Honda S2000 (2000 Maximum Displacement) Spec Lines, change notes as follows: "HKS Supercharger kit 12001-AH006 and 12001-AH010, allowed" In STU, Honda S2000 (2157 Maximum Displacement) Spec Lines, change notes as follows: "HKS Supercharger kit 12001-AH006 and 12001-AH010, allowed"
Request BoP on the Lotus
#27637 from Eric Heinrich · Rule change · TB 20-04 (2020-04 Fastrack)
In STU, Lotus Elise Cup R Spec Lines, change weight as follows: "2200 2300" In STU, Lotus Elise SC/ LotusExige SC Spec Lines, change weights as follows: "2200 2300" "2400 2500"
In STU, classify the Volkswagen GTI/GLI MK5 as follows: "May install TIR in the OEM turbo inlet housing. Must comply with all TIR specification." In STU, Volkswagen Jetta Mk4 Spec Lines, add to Notes as follows: "May install TIR in the OEM turbo inlet housing. Must comply with all TIR specification." In STU, add Spec Line, Volkswagen GTI/GLI MK5: STU Maximum Displacement (cc's) Minimum Weight Notes Volkswagen
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GTI/GLI MK5 1984 Chart K04 turbocharger permitted. May install TIR in the OEM turbo inlet housing. Must comply with all alternate TIR location specification.
In STU, Honda K20C1 Turbo I4 Table A, change Notes as follows: "36 35mm"
Change GM LNF 2.0 Allowance to LSJ Engine for Viable STL 2.0
#27884 from David Mead · Rule change · TB 20-04 (2020-04 Fastrack)
In STU, GM Ecotech LNF Spec Lines, add to Notes as follows: “LNF Engine Permitted with turbocharger removed. LNF Engine short block with LE5 cylinder head and intake manifold permitted. Must meet all other STL specifications.”
Alternate Engine for Porsche 944
#28259 from Tim Pitts · Rule change · TB 20-04 (2020-04 Fastrack)
In STU, classify the Porsche 944 as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Porsche 944 1800 Chart VW/Audi 1.8L turbo engine permitted. Porsche 944 2000 Chart VW/Audi 2.0L turbo engine permitted.
Please Modify the STU Wheel Size Rule for Clarity
#27694 from David Fiorelli · Rule change · TB 20-03 (2020-03 Fastrack)
In STU, GCR section 9.1.4.1.F.1., change base weight as follows: "Vehicles over 2950 2951 base weight may use a 9 inch wide wheel." Note: Other requests in this letter are not recommended.
Turbo Engine Cars Base Weight
#28032 from Jose De Miguel · Rule change · TB 20-03 (2020-03 Fastrack)
In STU, GCR section 9.1.4.1.H.6., change as follows: "All turbocharged engines shall use a turbo inlet restrictor. Vehicle minimum base weight is determined by TIR size selected from the following table. Turbocharged engines of greater than 2.7L displacement shall use the weight either as listed in the lbs/cc or restrictor size/lbs charts, whichever is greater. Turbocharged engines utilizing Direct Fuel Injection (DI) shall increase their minimum base weight by 3%."
Request for an electronic throttle body
#27342 from Paul Azan · Rule change · TB 19-12 (2019-12 Fastrack)
In GCR section 9.1.4.G.8, make changes as follows: "Cars produced with an electronic throttle body may use the OEM electronic throttle body. The OEM electronic throttle body may be converted to manual actuation and the actuation cam on a manual throttle body may be changed to alter the opening/closing rate of the butterfly. Alternately actuated throttle bodies may be considered on a case by case basis. Vehicle/engine combinations with manual OEM throttle bodies may be converted to an OEM electronic throttle body of the same inner diameter as the original OEM throttle body."
In STU, GCR section 9.1.4.1..A.3.b., make changes as follows: "A wing assembly no wider than the widest part of the body (Not including the mirrors), with a maximum cord length of 12”, and end plates that do not exceed 72.0 square inches each. No part of T the wing assembly may be no higher than roof height."
Remove -2mm penalty from SR20DET Nissan
#26982 from Super Touring Committee · Rule change · TB 19-07 (2019-07 Fastrack)
In STU, Nissan SR20DET, Table B, make changes as follows: STU Maximum Displacement (cc's) Minimum Weight Notes
Request clarification for manifold and throttle in STU
#27004 from Jose De Miguel · Rule change · TB 19-07 (2019-07 Fastrack)
In STU, GCR section 9.1.4.1.B.3, make changes as follows: "All cars shall use the installed engine’s or vehicle's stock air throttling device (e.g., throttle body, carburetor) and intake manifold, unless noted otherwise. Alternate intake manifolds will be permitted on a case-by-case basis."
Request to clarify afterrmarket side skirts exhaust exit
#26814 from Patrick Lipsinic · Rule change · TB 19-06 (2019-06 Fastrack)
In GCR section 9.1.4.D.6, add as follows: "Aftermarket side skirts may be used provided they meet the minimum ride height rule of 3 inches, have no openings/ducts in them other than for jacking insert(s), or side exit exhaust, are no wider than the approved fascias, do not extend any higher than the bottom of the door and do not reinforce the chassis."
Wheel Flare wording
#26872 from Super Touring Committee · Rule change · TB 19-06 (2019-06 Fastrack)
In GCR section 9.1.4.1.A.3.d, make changes as follows "OEM base model body Each fender may be flared to allow for tire clearance up to 2” with a weight penalty of 1%. The flare must maintain the OEM profile and appearance, seamlessly around the wheel arch. Material may be added, or removed as necessary to create flare."
In GCR Appendix K.F.5, add as follows: “Ride height will be measured without driver at the lowest point of the rocker panel, not including the pinch weld.” In GCR section 9.1.4.F.5, add as follows: “Ride height will be measured without driver at the lowest point of the rocker panel, not including the pinch weld.”
Request to Use Japanese Mazda 13b Intake Manifold
#25790 from Luis Rivera · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.1 Table B, add to notes as follows: STU Maximum Displacement (cc’s) Minimum Weight Notes Mazda 13B NA 2300 Street porting allowed, contact SCCA Technical
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Services for details. Stock Fuel injection or 1 Auto- type 2 barrel carburetor with 42mm chokes on a “dual-y” manifold. May use ELITE ROTARY SHOP FD V2.0 INTAKE Mazda 13B Bridge Port NA 2600 Stock intake manifold & throttle body required, or automotive 2 barrel carb with 44 mm chokes. May use ELITE ROTARY SHOP FD V2.0 INTAKE
Request Alternate Intake for Mazda MZR In a Rear Wheel Drive App.
#26352 from John Weisb · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.1, Table A, Mazda MZR (LF, L3, L5), add to notes as follows: “May use Goodwin Part # 61-2510 Intake manifold. Must use stock throttle body or Acura part number 16400-PND-A17.”
E&O Suspension
#26424 from Super Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.1.E, remove wording as follows: “7. Alternate suspension components including spindle, knuckle, hubs, etc. sourced from the same manufacture are permitted.” In GCR section 9.1.4.1.D, add wording as follows: “7. Alternate suspension components including spindle, knuckle, hubs, etc. sourced from the same manufacture are permitted.”
Revisit B20 VTEC
#26530 from Super Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In STU, GCR section 9.1.4.1 Table B, classify the Honda/Acura B20 as follows: STU Maximum Displacement (cc’s) Minimum Weight Notes Honda/Acura B20 1973 Chart May use Cylinder Head and Intake Manifold from VTEC B16 or B18 engine. Manifold must be from same as the
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Cylinder Head, i.e. B16 Intake with B16 Head.
Move Flared Fenders to STU Advanced Aero
#26564 from Super Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.C.10, remove as follows: “OEM base model body fenders may be flared to allow for tire clearance up to 2” with a weight penalty of 1%. They must maintain the OEM profile and appearance, seamlessly around the wheel arch.” In GCR section 9.1.4.1.A.3, add as follows: “d. OEM base model body fenders may be flared to allow for tire clearance up to 2” with a weight penalty of 1%. They must maintain the OEM profile and appearance, seamlessly around the wheel arch.”
TCA Civic SI E&O
#26606 from Super Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.1, Table B, Honda Civic Si TCA (2017-), add to notes as follows: “37mm TIR required as of 6-1-19.”
S54 Spec line
#26620 from Super Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.4.1 Table B, BMW E46 S54 OEM, make changes to the spec line as follows: STU Maximum Displacement (cc’s) Minimum Weight Notes BMW E46 S54B32 OEM 3246 3300 Cannot use Super Touring engine allowances
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and must be OEM as delivered for sale in the U.S., including stock intake plenum, and camshafts. Engine cylinders may be over bored 1mm. Compression may increase .5. No porting allowed.
Request to Class Assignment for 2017 Civic
#24287 from Frank Woody · Rule change · TB 19-03 (2019-03 Fastrack)
In STU, classify the Honda Civic Si (2017-) as follows:
A specification table follows in the original; it is not shown here.
A specification table follows in the original; it is not shown here.
Engine Classification for Rotary
#25564 from Luis Rivera · Rule change · TB 19-03 (2019-03 Fastrack)
In STU, table B, Mazda 13B, add to the notes as follows: “May use 13B RE or REW housings and intake with turbo removed.” In STU, table B, Mazda 13B Bridge Port, add to the notes as follows: “May use 13B RE or REW housings and intake with turbo removed.”
In STU, Honda K24, table B, add to the notes as follows: “May use intake part #s 17100-RRB-A00, or 17100-PRB-A10.”
Request to Classify 12a Bridge Ported Rotary Engine
#25985 from Christopher Harris · Rule change · TB 19-03 (2019-03 Fastrack)
In STU, add Mazda 12 A Bridge port to table B as follows:
A specification table follows in the original; it is not shown here.
World Challenge Car Eligibility
#26387 from Super Touring Committee · Rule change · TB 19-03 (2019-03 Fastrack)
In STU, GCR section 9.1.4.B.2.c, strike the wording as follows: “Weight will be set at the greater of the World Challenge weight plus 5% or the STU rules weight plus 5%.”
Request a phone call for discussion regarding weight
In STU, 9.1.4.1.H.6., strike the wording in the table as follows: “AWD/ RWD cars must reduce restrictor 1 mm from this table.”
Advanced Aero E&O
#26413 from Super Touring Committee · Rule change · TB 19-03 (2019-03 Fastrack)
In STU, 9.1.4.1.A.3.b., add the wording as follows: “A wing no wider than the widest part of the body (Not including the mirrors), with a maximum cord length of 12”, and end plates that do not exceed 72.0 square inches each. The wing may be no higher than roof height.”
Request to Equalize Direct Injected Turbo Cars
#24890 from Kevin Koelemeyer · Rule change · TB 19-01 (2019-01 Fastrack)
In STU, Table A, add engine as follows: STU Maximum Displacement (cc’s) Minimum Weight Notes Honda K20C1 Turbo I4 1996 CC 3025 36mm TIR Required.
Other letters
Advanced Aero Penalty for GT3 Cars
#40020 from John Weisberg · Not recommended · Minutes (2026-07 Fastrack)
#40194 from Bjorn Stange · No action required · Minutes (2026-06 Fastrack)
You are correct that the 4% is applied at the end, after all other adders and subtractors. Consolidating the 4% into the weight table is currently under consideration.
Inclusion of Letter Writer.
#40108 from John Weisberg · Not recommended · Minutes (2026-06 Fastrack)
Due to time restraints, it would not be practical to include every letter writer to the monthly zoom calls and manage bringing them in and removing them for just the discussion of their letter.
Wings GT3/STU
#40017 from John Weisberg · No action required · Minutes (2026-06 Fastrack)
#39950 from Kip VanSteenburg · No action required · Minutes (2026-06 Fastrack)
SCCA is still in support of combining these two classes. We have requested data to be collected at Atlanta, VIR and beyond to support the BoP effort.
Allow RX8 hubs and Transaxle on Miata NC for Safety Reasons
#39821 from Jorge A Nazario · No action required · Minutes (2026-03 Fastrack)
Suspension components in your request are currently legal in STU. Please see 9.1.4.1.D.7. If you are requesting a Diff, please submit a letter with that request.
Boxster Brake Rotor
#39813 from Edwin Soto-Quinones · Not recommended · Minutes (2026-03 Fastrack)
The 340mm brake rotor is beyond the size allowed in STU and not consistent with class formula.
Brake vacuum regulators
#39812 from Super Touring Committee · Recommended to the Board · Minutes (2026-03 Fastrack)
In GCR, Section 9.1.4.1.E.8., add the following: “(Effective 3/1/2026) Brake booster vacuum regulator allowed, cannot be in-car adjustable.”
39258 GT3U Car Ride Height
#39559 from Michael Heintzman · No action required · Minutes (2026-01 Fastrack)
We will continue to collect data and monitor the class. Please bring your car out and race it so we can collect data.
Balance of Performance
#39496 from Peter St Pierre · Taken care of · Minutes (2026-01 Fastrack)
TCR cars are no longer in STU. Adjustments have been made and will continue to be made throughout the year.
Request for STL Rule Review – Aftermarket Dash Allowance
#39450 from Lisa Keyes · Recommended to the Board · Minutes (2026-01 Fastrack)
In GCR, Section 9.1.4.E.6., change as follows: "Stock d Dash/instrument panel cover (dash pad) must be used which fully encloses instrument wiring and mechanical components. Original instruments/gauges may be replaced, or supplemented, with additional engine monitoring gauges. Accessories, lights and switches may be added or removed. Box-type extensions from the dash pad may be used to mount switches and controls, in the areas where the OEM insert panels were mounted, so that they more easily accessible to the driver. Audio and video systems may be removed. In GCR, Section 9.1.4.E.8., change as follows: "8. Dash pad modification – It is permitted to modify the dash pad in order to run the roll cage tubes through the dash area as
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long as the dash pad is modified only enough for roll cage fitment. If necessary, the dash pad may be parted to ease installation around roll cage. Any such parting shall be done in such a way as to minimize the appearance that they have been separated once pieces of dash pad are installed."
Parity in the Class
#39279 from Peter Federlin · Not recommended · Minutes (2026-01 Fastrack)
TCR cars are no longer in STU. Adjustments have been made and will continue to be made throughout the year.
STU TCR GT3U Solution.
#39147 from Eric Heinrich · Not recommended · Minutes (2026-01 Fastrack)
TCR cars are no longer in STU. Adjustments have been made and will continue to be made throughout the year.
GT3 into STU for 2026
#38953 from Armen Megregian · Not recommended · Minutes (2026-01 Fastrack)
We will be collecting data throughout the season and will make adjustments as needed.
STU GT3 Integration
#38838 from Douglas Hillmann · Taken care of · Minutes (2026-01 Fastrack)
TCR cars have been removed from STU and placed in T2 and are no longer an issue.
Aftermarket ABS Module
#39234 from Jose Pena · Recommended to the Board · Minutes (2025-12 Fastrack)
In GCR, Section 9.1.4.1.E., add the following: "7. Delta Motorsports ABS system is allowed. Other aftermarket ABS systems will be considered on a case by case basis."
Committee Resume
#39198 from Benjamin Slechta · Recommended to the Board · Minutes (2025-12 Fastrack)
Benjamin Slechta has been added to the STAC.
S54 Competition Adjustments
#39087 from Jill Urso · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. The TCR cars are no longer running with STU. The BoP between GT3U cars and STU cars will continue to be evaluated. Please continue to run your car so we can obtain data to include in our evaluation.
Traditional STU Cars - Dashboards
#39061 from Eric Heinrich · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. Your request is not within class philosophy.
STU BMW BOP
#39026 from Macey Urso · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. The TCR cars are no longer running with STU. The BoP between GT3U cars and STU cars will continue to be evaluated. Please continue to run your car so we can obtain data to include in our evaluation.
Wider Wheels for Honda S2000
#38939 from Will Clark · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. Not consistent with class Philosophy.
LOTUS EXIGE ADJUSTMENT
#38683 from Alex Krugman · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. Car is competitive as it is with latest adjustments.
MOVE TCR to T2-TCR
#39275 from Club Racing Board · Recommended to the Board · Minutes (2025-11 Fastrack)
In GCR, Section 9.1.4.1.H.7., change as follows: "All current STU cars, except TCR car s, may reduce their weight by 4% after all other modifiers." In STU Spec Lines, remove Chart STU-TCR in its entirety. In T2 Spec Lines, classify T2-TCR Chart as follows:
TB 25-08 Weight Error
#38885 from Terry Hanushek · Taken care of · Minutes (2025-09 Fastrack)
Thank you for your letter. Please see letter #38919 in current Fastrack.
Wheel/Tire allowance for STU
#38771 from Matt Busby · Not recommended · Minutes (2025-09 Fastrack)
Thank you for your letter.
Oppose 275 Tires for Heavier Cars
#38638 from Darin Treakle · No action required · Minutes (2025-09 Fastrack)
Thank you for your letter.
Cars Unable to Make Weight in STU
#38590 from Eric Heinrich · No action required · Minutes (2025-09 Fastrack)
Thank you for your letter.
Re #38007: 275 Tires in STU
#38588 from Eric Heinrich · No action required · Minutes (2025-09 Fastrack)
Thank you for your letter.
Oppose TCR cars in STU
#38637 from Darin Treakle · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR cars in STU
#38589 from Eric Heinrich · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR Cars in STU
#38586 from Peter Federlin · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR Cars in STU for 2025
#38578 from Paul Azan · No action required · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR Car Concern
#38560 from Jose Osiris Pena · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR Honda in STU
#38556 from Peter St Pierre · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
TCR in STU
#38535 from John Weisberg · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
Request for Approval of Alternate Intake Manifold for Mazda MZR
#38424 from Jorge A Nazario · Taken care of · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see letter #38422 in current Fastrack.
STU Tire Size Adjustment Request
#38143 from Jill Urso · Taken care of · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see letter #38007 in current Fastrack.
Request for BMW S54 B32 Weight Reduction
#38025 from Macey Urso · Taken care of · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see letter #38007 in current Fastrack.
Rear Wing Measurements
#38091 from Ethan Swindel · Not recommended · Minutes (2025-05 Fastrack)
Thank you for your letter. The rule is adequate as written.
Addition of 3L BMW N54/N55 Turbo engine
#38035 from David Mead · Not recommended · Minutes (2025-05 Fastrack)
Thank you for your letter. Without sufficient data we are not able to justify an adjustment. If the car comes, we would be happy to consider adjustments.
Drivetrain Error Correction/Language Cleanup
#37991 from Eric Heinrich · Recommended to the Board · Minutes (2025-05 Fastrack)
In GCR, Section 9.1.4.L.6., change as follows: "(Effective 6/1/2025) 6. Any limited-slip or locking differential is permitted"
4% Modifier for Table B Cars?
#37989 from Oscar Jackson · No action required · Minutes (2025-05 Fastrack)
Thank you for your letter. The 4% modifier does apply to all STU cars, including Table B cars.
Alt differential housings
#37032 from Super Touring Committee · Recommended to the Board · Minutes (2025-05 Fastrack)
In GCR, Section 9.1.4.1.C. add the following: "(Effective 6/1/25) 3. Front engine rear drive cars may use a Ford 8.8 IRS differential housing in place of the original housing. Rear subframes may be modified or replaced for fitment but cannot alter the mounting points of the rear suspension greater than what is allowed in 9.1.4.1.D."
DI Limited Prep Rule
#37909 from John Weisberg · No action required · Minutes (2025-04 Fastrack)
Thank you for your letter. Rules are adequate as written.
Request for Adjustment in Aerodynamic Regulations STU/GT3
#37816 from Jill Urso · Not recommended · Minutes (2025-04 Fastrack)
Thank you for your letter. As we work on the consolidation of these classes scheduled for 2026, we will evaluate aerodynamics as well as other performance parameters based on data we collect in 2025.
Classification Request - 1995-8 Eagle Talon Tsi AWD
#37784 from Daniel Malm · No action required · Minutes (2025-04 Fastrack)
Thank you for your letter. The 1995-1998 Eagle Talon Tsi AWD is eligible to run in STU without a spec line but must comply with all STU rules.
Body Parts Interchangeability
#37474 from Super Touring Committee · Recommended to the Board · Minutes (2025-04 Fastrack)
In GCR, Section 9.1.4.C.1., change as follows: "(Effective 6/1/2025) Unless otherwise allowed, standard body appearance must be strictly maintained. Different models of the same generation chassis may interchange body panels, trim and lights."
TCR in STU/GT3
#37368 from Taz Harvey · Not recommended · Minutes (2025-04 Fastrack)
Thank you for your letter. Please bring your car out so we can collect data.
Request for Weight Adjustment for BMW S54 Engine in STU Class
#37798 from Macey Urso · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. The engine is competitive as classed.
Weight Reduction
#37710 from Jose Osiris Pena · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. The GT3-U and STU merge is currently a work in progress. We are working to balance BoP.
BMW N54/N55 Engine Allowance follow up
#37641 from Martin Sarukhanyan · Taken care of · Minutes (2025-02 Fastrack)
Thank you for your letter. Please see letter #37447 in the current Fastrack.
2025/2026 BoP Consideration
#37553 from Ben Slechta · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. We will continue to monitor.
Standalone ABS in STU
#37461 from Anthony Piselli · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. With the changes being made, we will monitor and make changes as needed.
BMW N54 Engine Allowance Follow Up
#37456 from Martin Sarukhanyan · Taken care of · Minutes (2025-02 Fastrack)
Thank you for your letter. Please see letter #37447 in the current Fastrack.
Request for Lotus Exige
#37449 from Alex Krugman · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. Car is adequate as classified. We will continue to monitor.
Mazda Miata 13 B Turbo
#37445 from Raymond Philibert · Not recommended · Minutes (2025-02 Fastrack)
Thank you for your letter. Turbo sizes are adequate as written.
Sunroof Wording
#37402 from John Weisberg · No action required · Minutes (2025-01 Fastrack)
Thank you for your letter. Please see GCR Section 9.3.17. DETACHABLE PANELS/SUNROOFS for clarification.
Clarification on STU Differential Allowance
#37225 from David Fiorelli · Recommended to the Board · Minutes (2025-01 Fastrack)
In GCR, Section 9.1.4.L., add the following: "5. Any final drive ratio is permitted provided it fits the differential/transaxle housing without modification to the housing. 6. Any limited-slip or locking differential is permitted." In GCR, Section 9.1.4.2.C., change as follows: "3. Any final drive ratio is permitted provided it fits the differential/transaxle housing without modification to the housing. 4. Any limited-slip or locking differential is permitted. 5 3. Short shift kits are allowed."
Gasoline Direct Injection (GDI) to Port Injection Conversion
#37218 from Tim Pitts · No action required · Minutes (2025-01 Fastrack)
Thank you for your letter. We would consider this on a spec line for a specific engine. Please submit a parts list for us to consider.
Fender Flare Language Revisited
#37088 from Eric Heinrich · Not recommended · Minutes (2024-12 Fastrack)
Thank you for your letter. Rule language is adequate, no action required.
Allow a weight break for competitors using 180+ treadwear tires
#36636 from John Weisberg · Not recommended · Minutes (2024-12 Fastrack)
Thank you for your letter.
Merger GT3 to STU
#36958 from Club Racing Board · Recommended to the Board · Minutes (2024-10 Fastrack)
In STU, Table C, create new STU-GT3 classification as follows: In GCR, Section 9.1.4.1.F,, change as follows: ”Vehicles over 2950 2850” In GCR, Section 9.1.4.1.H., add the following: "7. All current STU cars may reduce their weight by 4% after all other modifiers."
Addendum to letter #36737
#36776 from Aaron Fitzsimmons · Taken care of · Minutes (2024-10 Fastrack)
Thank you for your letter. Please see response to letter #36737 in current Fastrack.
Boxster PCA Spec Boxster (SPB) Jongbloed Wheels
#36752 from Edwin Soto-Q · No action required · Minutes (2024-10 Fastrack)
Thank you for your letter. Future changes are coming that may address this issue after the runoffs. If they do not address your specific request, please resubmit your letter.
STU Mini R53 15% pulley with weight penalty
#36737 from Aaron Fitzsimmons · Not recommended · Minutes (2024-10 Fastrack)
Thank you for your letter. We have no data currently to support your request. Please provide us with JCW advertised power increases with the requested pulley. It would be helpful to have you participate at a HST event where data is frequently collected so we can obtain data on the car.
Tires Allowances
#36696 from Derek Ketchie · No action required · Minutes (2024-10 Fastrack)
Thank you for your letter. This is a topic we are considering and are currently discussing.
Front End Bodywork Swaps
#36190 from Ethan Swindel · Not recommended · Minutes (2024-07 Fastrack)
Thank you for your letter. Request is not consistent with class philosophy.
Tires Used in STU
#36006 from Peter Federlin · Not recommended · Minutes (2024-05 Fastrack)
Thank you for your letter. At this time there is no evidence that this change is needed, however we will continue to monitor data from the class. The GR86 Cup is a Spec Car and cannot take advantage of the STU preparation potential.
Subaru EJ20X/Y
#35735 from Anthony Piselli III · Not recommended · Minutes (2024-04 Fastrack)
Thank you for your letter. For consideration, please see GCR Section 9.1.4.G.2. for procedure to have the engine to be reviewed for classification. Please submit a new letter with required documentation.
Against Proposed Super Touring Light Changes in Feb Prelim TB
#35499 from Jose de Miguel · No action required · Minutes (2024-03 Fastrack)
Thank you for your letter. Please see letter #35492 in current Fastrack.
Fastrack TB 24-02
#35497 from Eliezer Torres · No action required · Minutes (2024-03 Fastrack)
Thank you for your letter. Please see letter #35492 in current Fastrack.
STU Weights
#35465 from Rodney King · Not recommended · Minutes (2024-03 Fastrack)
Thank you for your letter. The objective of what you requested was accommodated when the weight table was adjusted.
Request to class 3.4 Porsche Motor in STU
#35451 from Coyote Black · Not recommended · Minutes (2024-03 Fastrack)
Thank you for your letter. This car exceeds the displacement limits and performance envelope of STU. The STAC would recommend the author investigate the Touring rule set to determine if Touring would be a better fit for this application.
Please allow larger intercooler hood scoop
#35397 from Aaron Fitzsimmons · Taken care of · Minutes (2024-03 Fastrack)
Thank you for your letter. Please see letter #35397 in current Fastrack.
2022 BRZ Supercharged
#35279 from Kevin Anderson · No action required · Minutes (2024-01 Fastrack)
Thank you for your letter. Please provide STAC the TCA ruleset that the car will be prepared to, specifics regarding the HKS Supercharger with model number and the pulley sizes and compressor map as we requested previously.
Request for Inclusion of Spoiler in Rules for Wings
#35090 from Bill Damron · Not recommended · Minutes (2023-12 Fastrack)
Thank you for your letter.
Class Parity
#35014 from Chris Childs · No action required · Minutes (2023-12 Fastrack)
#34978 from Kevin Anderson · No action required · Minutes (2023-12 Fastrack)
Thank you for your letter. Please provide STAC the TCA ruleset that the car will be prepared to, specifics regarding the HKS Supercharger with model number and the pulley sizes and compressor map.
STU VTS Documentation
#34953 from Steve Davis · No action required · Minutes (2023-12 Fastrack)
Thank you for your letter. The car in question was running on the STU Spec Line, not the VTS ruleset.
STU Power to Weight Change
#34952 from Steve Davis · Not recommended · Minutes (2023-12 Fastrack)
Thank you for your letter. We will take it in to consideration as we move forward.
Allow Vents on Front Fenders for Mid/Rear Engined Cars
#34908 from Cameron Wagner · Recommended to the Board · Minutes (2023-12 Fastrack)
In GCR, STU Specific Technical Regulations, Section 9.1.4.1.A.2., add the following: "Hoods may have a maximum of 2 vents installed for cooling purposes. Cars with mid or rear engines may have a maximum of 2 vents located in the hood or fenders for cooling purposes. The maximum combined total area of the vents shall not exceed 200 square inches. The 200 Square inches includes any area that deviates from the factory hood or fender(s) profile. Louvers within the 200 sq. inch are allowed. Louver vents that are OEM do not count in the number of vents allowed or 200 square inch allowance.
Request Porsche 944 BOP Adjustment
#33811 from Joe Moser · Not recommended · Minutes (2023-12 Fastrack)
Thank you for your letter. Data does not currently support BoP adjustments at this time. We will continue to watch the performance of this car through 2024.
H Pattern Dog Box Clarification
#34734 from Super Touring Committee · Recommended to the Board · Minutes (2023-09 Fastrack)
In GCR, Section 9.1.4.1.C.2., add the following: "(Effective 1/1/2024) Cars equipped with Alternate H-Pattern Transmission w/non-stock type syncros (dog-ring) will increase the required minimum weight by 1.25%."
Clarification on Dogbox Gears in H-Pattern Transmission
#34634 from BILL DAMRON · Taken care of · Minutes (2023-09 Fastrack)
Thank you for your letter. Please see letter #34734 in current Fastrack.
STU Horsepower/Weight Analyzation
#34597 from Steve Davis · Not recommended · Minutes (2023-09 Fastrack)
Thank you for your letter. We continue to gather and review data to make BoP changes, as needed.
Larger Brakes for Larger Cars
#34227 from John Weisberg · Not recommended · Minutes (2023-09 Fastrack)
Thank you for your letter. At this time, your request is not recommended.
BMW N52B25 Engine
#34226 from John Weisberg · Not recommended · Minutes (2023-09 Fastrack)
Thank you for your letter. At this time, this request is not recommended.
Alternate Drive Shaft Material
#34160 from Peter Federlin · Not recommended · Minutes (2023-09 Fastrack)
Thank you for your letter. Carbon Fiber Driveshafts are not allowed in STU.
Wheel Width
#34313 from Skylar McKnight · Not recommended · Minutes (2023-06 Fastrack)
Thank you for your letter. We have found that 8” wheels are available for your car. Allowing 8.5” wheels would have a negative impact on other competitors in this class.
Wheel Width
#33974 from Skylar McKnight · Not recommended · Minutes (2023-05 Fastrack)
Thank you for your letter. Not consistent with class philosophy.
STU split into STU and STO
#33484 from Nick Leverone · Not recommended · Minutes (2023-05 Fastrack)
Thank you for your letter.
Clarify Base Weight Usage vs Minimum Weight Usage
#33457 from David Fiorelli · Taken care of · Minutes (2023-05 Fastrack)
Thank you for your letter. Please see letter #33888 in April 2023 Fastrack.
Change the wheel rule in STU to be based on minimum weight reathe
#33386 from David Fiorelli · Taken care of · Minutes (2023-05 Fastrack)
Thank you for your letter. Please see letter #33888 in April 2023 Fastrack.
Eagle Talon TSI AWD Classification for STU
#33750 from Sean Benson · No action required · Minutes (2023-04 Fastrack)
Thank you for your letter. Please refer to GCR Section 9.1.4.H.3. for rules for Turbo charged vehicles in STU.
Request Dash panel rule change
#33512 from George Marsanick · Not recommended · Minutes (2023-01 Fastrack)
Thank you for your letter. Your request is not consistent with ST class philosophy.
Help for Mustang to Run T3 and STU Affordably and Competitively
#33388 from Ryan Sprehe · No action required · Minutes (2023-01 Fastrack)
Thank you for your letter. Run the cars under current STU rules, allowing us to collect data and we will review for potential BoP adjustments.
Heavy Cars
#33344 from Scotty B White · No action required · Minutes (2023-01 Fastrack)
Thank you for your letter. Run the cars under current STU rules, allowing us to collect data and we will review for potential BoP adjustments.
Request for BMW N54 Intake Manifold on M50
#33398 from Hugh Stewart · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. The N54 Intake Manifold on M50 is not approved. Regarding drive by wire capabilities, please see 9.1.4.G.8.
Composite Roof
#33367 from Hugh Stewart · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. Request is not consistent with class philosophy.
LS-VTEC Conversion Honda B-Series
#33285 from Deacon Greenfield · No action required · Minutes (2022-12 Fastrack)
Thank you for your letter. Please see GCR, STU Table B: Alternate Vehicle and Engine Allowances, Honda/Acura B20.
Allow EP cars in STU
#33284 from Bill Lamkin · Taken care of · Minutes (2022-12 Fastrack)
Thank you for your letter. A survey will be sent to STU and EP participants to see what interest there would be in allowing EP to double-dip in STU.
Request to clarify front bumper rule
#33245 from David Mead · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. Rule is adequate as written.
Remove 9.1.4.1.E.6 as Redundant
#33055 from Greg Amy · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. The two lines of the GCR are found not to be redundant, as one allows for the existence of portioning valves and the other allows for driver adjustability of brake force balance.
Questions about Electronic Throttle Usage
#33090 from Robert Rosa · Recommended to the Board · Minutes (2022-10 Fastrack)
In STU, GCR Section 9.1.4.1.B.3., change as follows: "3. All cars shall use the installed engine’s or vehicle’s stock air throttling device (e.g., throttle body, carburetor) and intake manifold, unless noted otherwise. Alternate intake manifolds will be permitted on a case-by-case basis."
32393 Response - Overly Favors MX-5
#32470 from Eric Heinrich · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. The change was made based on collected data and we will continue to monitor data and adjust as necessary.
STU Add 5% Weight to MX-5/Miata
#32463 from Greg Amy · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. The change was made based on collected data and we will continue to monitor data and adjust as necessary.
STU wheel width rule
#32409 from Super Touring Committee · Recommended to the Board · Minutes (2022-04 Fastrack)
In STU, GCR Section 9.1.4.1.F., change as follows: "Wheels may not exceed 18 inches in diameter and or 8.0 inches in width for vehicles under 2950 lbs. and under base minimum allowed race weight. Vehicles over 2951 0 base minimum allowed race weight may use a 9 inch wide wheel."
March 2022 Fastrack STU Weight Modifiers Changes
#32389 from Antonio Llona · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. The change was made based on collected data and we will continue to monitor data and adjust as necessary.
Clarification on OEM crankshaft interchangeability
#32306 from Bill Damron · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. An alternate crankshaft must be of identical dimensions.
Reinstate the 33mm Restrictor in STU
#32298 from Tim Pitts · Recommended to the Board · Minutes (2022-04 Fastrack)
In STU, GCR Section 9.1.4.1.H.6., add to chart the following: Inlet Restrictor (mm): "33" Minimum Weight (lbs): "2380"
Proposed weight change to Porsche 944/ Audi 1.8T spec. line
#32297 from Tim Pitts · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. The available data has shown the Audi/VW 1.8T is competitive as specified.
Rule 9.1.4.F.1 - Adjust Wheel Width Min Weight
#32282 from Cameron Wagner · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. We would like to see the effect of the new weight chart before making adjustments to the wheel width rule.
STU 9.1.4.H Chart Weights Adjustments
#31976 from Christopher Childs · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Weight Reduction Request for Dual Throttle Body Cars
#31699 from James Slechta · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
31449 single TB weight modifiers
#31696 from Ron Olsen · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
10% Weight Reduction Letter
#31673 from Jose Osiris Pena · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Reconsider Weight Break for Single Throttle Body Cars.
#31671 from Jeronimo Esteve · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Weight Reduction for NA Cars
#31670 from James Slechta · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Letter #31449 NA Engine Weight Breaks
#31664 from Eric Heinrich · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Request to Adjust Weight Adders for Large Displacement NA Engines
#31649 from Eric Heinrich · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
Request to Adjust Honda b20 Vtech and k20 Weight to Create Parity
#31529 from John Weisberg · Not recommended · Minutes (2022-03 Fastrack)
Thank you for your letter. Request is not recommended at this time.
9.1.4.H Revisions
#31876 from Greg Amy · No action required · Minutes (2022-02 Fastrack)
Thank you for your letter.
ABS Clarification Request
#31872 from Jeronimo Esteve · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. Power assisted brake systems and ABS systems are not the same. Currently there are no provisions for changing systems, even within same manufacturer.
Follow up to Letter 31824 AWD TIR Change Concerns
#31826 from Eric Thompson · No action required · Minutes (2022-02 Fastrack)
Thank you for your letter. There are currently no changes planned for AWD.
AWD TIR Change Concerns
#31824 from Eric Thompson · No action required · Minutes (2022-02 Fastrack)
Thank you for your letter. There are currently no changes planned for AWD.
Request to Remove BMW S54B32 OEM from STU Table B
#31647 from Eric Heinrich · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. At this time it is not recommended.
Remove Restrictor from TCA Cars
#31644 from Chris Taylor · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. Not consistent with class philosophy.
Rules Stability
#31735 from Robert Verenna · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter.
Stop Eroding the Philosophy of the Class!
#31731 from Matt Blehm · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter.
Opposes STU rules changes
#31722 from Darin Treakle · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter.
10% weight reduction
#31720 from Dennis Fernandez · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter.
Additional to #31712
#31713 from Oscar Jackson · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. Your request is not consistent with class philosophy.
Remove Engine Manufacturer Match Requirement
#31712 from Oscar Jackson · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. Your request is not consistent with class philosophy.
Requesting Super Touring U
#31710 from Greg Amy · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter.
Throttle Body Inlet Equality
#31704 from John Weisberg · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. Not recommended at this time.
Request to Remove 9 Inch Wheels
#31650 from Eric Heinrich · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. In the interest of class stability, your request is not recommended.
Request for Intake Porting Clarification
#31646 from Eric Heinrich · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see letter #31323 in current Fastrack.
Mazda 13B Bridge Port Throttle Body Request
#31471 from Raymond Philibert · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. The rule currently allows any dual throttle bodies or auto type 2BBL with any dual wide manifold. Must run 42mm chokes.
Request for Elimination of 9.1.4.E.6. for STU
#31470 from Scott Peterson · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. Your request is against class philosophy.
Electric Assist Steering
#31441 from John Weisberg · Recommended to the Board · Minutes (2022-01 Fastrack)
Effective 03/01/2022 In GCR, Section 9.1.4.16.e, add as follows: "An OEM hydraulic-assisted steering system may be used."
Traction Control Resubmission
#31397 from Mark Liller · Recommended to the Board · Minutes (2022-01 Fastrack)
Effective 03/01/2022 In GCR, Section 9.1.4.G.10. change as follows: "Engine calibration (spark and fuel) including Traction Control is free."
Runoffs DSQ STU 3rd Place/ Throttle Body
#31328 from Axel Cabrera · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see letter #31323 in current Fastrack.
Air Intake for Throttle
#31322 from Jose de Miguel · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see response to letter #31328 in current Fastrack.
Request alternate Miata hubs
#31158 from Christopher Childs · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Front hub was submitted in the General Rules so that it applied to both STL and STU.
Water Cooling
#31074 from John Weisberg · Recommended to the Board · Minutes (2021-10 Fastrack)
In GCR, Section 901.4.H. change as follows: "1. Water Cooling Provided that the stock method of cooling is retained, the cooling system is free, including cooling fans, but. Water radiator(s) must remain in the approximate OEM location or removed. The mounting angle may be changed."
STU Wheel change request
#30886 from Darin Treakle · Not recommended · Minutes (2021-08 Fastrack)
Thank you for your letter. This request is not recommended at this time.
Request to Classify Honda Accord 2014 3.5 V6 in STU
#30704 from Hermogenes Ramirez · No action required · Minutes (2021-07 Fastrack)
Thank you for your letter. The car is already allowed, refer to Table B Alternate Table Allowance, must meet PWC VTS dated 2/5/16.
Request Clarification
#30694 from Jeff Cripe · Not recommended · Minutes (2021-07 Fastrack)
Thank you for your letter. This is a change from a single throttle body to individual throttle body, which does not meet class philosophy. Please refer to GCR section 9.1.4.1.B.3.
Request to add 2004 Mazda Protégé World Challenge Car
#29575 from Jose De Miguel · Not recommended · Minutes (2021-06 Fastrack)
Thank you for your letter. At this time, we do not have enough information to classify the car in STU. If more information is available, we would be happy to review.
Request to Classify the Hyundai Veloster Turbo TCA
#27895 from Kyle Compton · Not recommended · Minutes (2021-06 Fastrack)
Thank you for your letter. At this time, we do not have enough information to classify the car in STU. If more information is available, we would be happy to review.
BMW 2.5 Intake Option
#30440 from Jeff Cripe · Not recommended · Minutes (2021-05 Fastrack)
Thank you for your letter. Your request is not consistent with class philosophy.
Colorado Region
#30418 from William Goodro · No action required · Minutes (2021-05 Fastrack)
Thank you for your letter. Your request is compliant with procedures as outlined in GCR.
Request to allow reproduction fenders for VW Corrado
#30411 from Paul Stephan · Not recommended · Minutes (2021-04 Fastrack)
Thank you for your letter. We do not allow alternate material from the OEM to be used.
Classification Request
#30404 from Tom Rogers · Not recommended · Minutes (2021-04 Fastrack)
Thank you for your letter. The ST class is built around widely available components, not designed for specialty engines.
Honda S2000 Block and Crankshaft
#30402 from Hermogenes Ramirez · No action required · Minutes (2021-04 Fastrack)
Thank you for your letter. Please refer to letter #30342 in current Fastrack.
Oil coolers in STU
#30396 from David Fiorelli · No action required · Minutes (2021-04 Fastrack)
Thank you for your letter. Please refer to letter #30388 in current Fastrack.
Please fix E&O for oil coolers in ST*
#30394 from Matt Blehm · No action required · Minutes (2021-04 Fastrack)
Thank you for your letter. Please refer to letter #30388 in current Fastrack.
Move Letter #21441 to ST General
#30069 from Eric Thompson · Not recommended · Minutes (2021-04 Fastrack)
Thank you for your letter. If you have an issue with a specific model, we would consider considering issues specifically, not in general.
Alternate Miata Hubs
#30052 from Michael Kamalian · Not recommended · Minutes (2021-04 Fastrack)
Thank you for your letter. Request is not recommended due to being outside of class philosophy. Alternate material hubs are not an approved modification.
Request clarifications on ABS
#29831 from Bill Lamkin · No action required · Minutes (2021-04 Fastrack)
Thank you for your letter. The committee has reached out to the letter writer with no response. We feel the rule is clear as written.
Competitive Adjustment - <3.0L Engine/Cars
#30128 from Joe Moser · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. We will be analyzing data to see if changes need to be made in the future.
Opposition Letter to 13B Changes in STU
#30084 from David Mead · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. Please see January GCR for clarification.
AWD W/Front Struts 2.5% Weight Reduction
#30068 from Eric Thompson · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. We are taking your request under consideration. We would like to see the car race, requesting to collect data so that we can evaluate BoP adjustments.
ABS Brakes
#29989 from Christopher Childs · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. ABS systems may be added to cars not originally equipped. The ABS system must be of the same manufacturer as the car it is being added to and be a street car production system. Non ABS weight break does not apply.".
Adjust the Weight Reduction Percentage for the Larger Engines
#29988 from Christopher Childs · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. We will be analyzing data to see if changes need to be made in the future.
Re WDYT #26402 ITB's
#29972 from Eric Heinrich · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. We will take your suggestions into consideration.
RE: STU WDYT #26402 FPR's
#29971 from Eric Heinrich · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. We will take your suggestions into consideration.
Request adjustments for 2021 Toyota Supra
#29659 from Ryan Saari · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. Your request is not consistent with the ST rule package.
Request wheel size change
#29857 from Skylar McKnight · Not recommended · Minutes (2021-01 Fastrack)
Thank you for your letter. Request is not consistent with class philosophy.
Request For Weight and Choke Adjustment of 13B Street Port
#29562 from Raymond Philibert · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. Please reference letter #29333 in the current Fastrack.
Request Car /classification
#29146 from Raphael Assuncao · No action required · Minutes (2021-01 Fastrack)
Thank you for your letter. We attempted to reach the letter writer with no response.
Request for Dive Planes
#29511 from Mark Crellin · Not recommended · Minutes (2020-12 Fastrack)
Thank you for your letter. Your request is against class philosophy.
Request rule clarification
#29474 from Alan Orban · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Bolt on flares are allowed within perimeters established in GCR.
Request to create a flat plate restrictor size/engine displ table
#26402 from John Weisberg · Member feedback requested · Minutes (2020-12 Fastrack)
The Club Racing Board requests class stakeholder input on considered throttle body changes in the ST class. Please reply via the CRB letter log system. 1. Should ST standardize a throttle body size per displacement? Or per class? 2. Should individual throttle bodies be allowed in all STU engines with a weight penalty?
Sequential Shift Transmission Clarification
#29446 from Peter Federlin · Not recommended · Minutes (2020-10 Fastrack)
Thank you for your letter. The change you have requested would require a penalty.
Request for Stand Alone 1% Weight Penalty for 2
#29138 from Eric Thompson · No action required · Minutes (2020-09 Fastrack)
Thank you for your letter. Please see letter #29124 in current Fastrack.
Volvo TIR Placement
#27655 from Tim Hunter · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter. There is no need for the change, your request can be accomplished within the current rule set.
Request BoP for Renesys 13B Rotary engine
#26899 from Robert Tanon · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter. We will continue to monitor and make BoP adjustments as necessary.
Request to remove Mercedes CLK classification
#28784 from David Mead · Recommended to the Board · Minutes (2020-06 Fastrack)
In STU, remove Mercedes CLK classification.
Request to add a list of eligible Manufacturer partners
#28782 from John Weisberg · Not recommended · Minutes (2020-06 Fastrack)
Thank you for your letter. The rule as written is sufficient.
Request to classify 12-15 Audi S5 Supercharged in STU
#28504 from Eric Heinrich · Not recommended · Minutes (2020-06 Fastrack)
Thank you for your letter. After a discussion on 3 separate calls, it has been determined it is too much for STU.
2008 Subaru Impreza WRX STI
#28099 from Thomas Wiegner · No action required · Minutes (2020-06 Fastrack)
Thank you for your letter. All wheel and rear wheel drive cars are treated as a rear wheel drive car.
Request response to letter 27735
#28552 from Jim Drago · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. Please see letter #27735 in current Fastrack.
Re: #27532 tire widths - smart call, support response
#28549 from Eric Heinrich · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter.
Request for Honda NA K24 Intake Manifold
#27843 from John Schmitt · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. The STU Honda K24 is competitive as classified.
Request for Traction Control Systems
#27817 from Mark Liller · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. Traction control is not legal in the Super Touring classes.
Direct injection Penalties
#27735 from Jim Drago · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. There is no change to the current TIR chart.
Request to adjust NA chart to graduated
#27631 from Eric Heinrich · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. The current STU weight chart is sufficient as written.
Adapting Rules to Attract
#27013 from Eric Heinrich · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter.
Alternate Turbo Allowance Modernization
#26957 from Eric Thompson · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. The requested turbo is outside the current STU turbocharger capabilities.
Request to classify a 2006 E90 325 with S54 driveline
#26821 from Andrew Conner · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. The BMW E90 chassis and S54 engine are currently allowed in STU.
Request classification of a RealTime Racing V6 TSX
#24146 from John Whitaker · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. Car does not comply with the STU regulations in the current configuration.
Request to clarify wicker height
#28224 from SCCA Staff · Recommended to the Board · Minutes (2020-03 Fastrack)
In ST, GCR section 9.1.4.D.4.d., add as follows: "Maximum allowable wicker height is 0.50 inches."
Request to allow polycarbonate for sunroof replacement
#28188 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Sun roof replacement rules are adequate as written.
Request for STU Car Adjustment (Approved Turbo)
#28071 from Thomas Green · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Please refer to 9.1.4.1.H.5 the STU alternate turbo list.
Strut Car Weight Reduction (Existing Rule) Question
#27806 from Bill Lamkin · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. With the allowable STU suspension pick up point modifications, the CRB believes a front strut weight reduction is necessary. The CRB will continue to monitor performance.
Aftermarket Intake Manifolds and Throttle Bodies
#27644 from Christopher DeShong · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. STU aftermarket intake manifolds are approved on a case by case basis. Aftermarket throttle bodies are not within the STU class philosophy.
Request to fix the TIR chart errors
#27636 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU FWD weights need to be adjusted. The CRB will continue to monitor performance.
Request FWD weight adjustment
#27635 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU FWD weights need to be adjusted. The CRB will continue to monitor performance.
Request a mid-engine placement adjuster
#27634 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU mid engines chassis need to be adjusted. The CRB will continue to monitor performance.
Request advanced aero changes
#27633 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Current advanced aero rules are adequately written.
Request small displacement NA engines intake/tb
#27632 from Eric Heinrich · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. STU aftermarket intake manifolds are approved on a case by case basis.
Request small displacement NA engines need help
#27630 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU small displacement engines need to be adjusted. The CRB will continue to monitor performance.
Request to Classify Nissan 350Z in STU
#27620 from David Muramoto · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The Nissan VQ30 engine is eligible for STU.
Request to Change Tire Section Width to Weight Based
#27532 from Michael Kritikos · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Current STU tire rules are adequately written.
Request for PWC TC MX5 2.5 Weight Revision
#27458 from Robert Tanon · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. PWC TC MX5 rule set is no longer available to the SCCA.
Request for RX8 Window Framework Removal
#27430 from Dale Shoemaker · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Current window removal rules are adequately written.
STU DI turbocharged engine changes
#27733 from SCCA Staff · Recommended to the Board · Minutes (2019-12 Fastrack)
In STU, GCR section 9.1.4.1.H., add DI section and renumber as follows: "7. All Direct Injected Turbocharged engines will be limited in preparation. DI Turbo engines must use OEM compression ratios, OEM camshaft lift, and may not port the cylinder head."
Request for Headlights Covers with Openings for Air Ducts
#27389 from Juan Catala · Not recommended · Minutes (2019-10 Fastrack)
Thank you for your letter. The STAC does not recommend this change at this time.
Request non ABS modifier in STU
#27161 from John Schmitt · No action required · Minutes (2019-10 Fastrack)
Thank you for your letter. The GCR already allows STU a non-ABS modifier. Please reference GCR Section 9.1.4.N.10 - Vehicles not equipped with ABS brakes may reduce their weight by 2%.
Supporting letter 26908 - Rules freeze
#27105 from Y. Roger Maeda · No action required · Minutes (2019-10 Fastrack)
Thank you for your letter. Please see the response to letter #26908 in this Fastrack.
Request a Rule Freeze
#26908 from Mark Liller · Not recommended · Minutes (2019-10 Fastrack)
Thank you for your letter. The STAC does not anticipate any major STU changes in 2020.
Request to change eligibility allowances for ST
#27020 from Dave Mead · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. This change is not recommended. The Club Racing Board feels that the rules are adequate as written.
Are all wheel drive vehicles allowed to run in any ST class?
#26962 from Jeremy Tanner · No action required · Minutes (2019-07 Fastrack)
Thank you for your letter. All Wheel Drive is permitted in Super Touring.
Request a Rule Freeze
#26908 from Mark Liller · Member feedback requested · Minutes (2019-07 Fastrack)
The Club Racing Board is requesting member input regarding freezing the rules in STU through the end of 2020. This would not include any prudent BOP changes including weight and restrictor.
Request to approve alternate turbocharger on Subaru WRX/STI
#26884 from Joel Baez · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. This change is not recommended at this time. There is a list of approved alternate turbos for STU. Please choose either the stock turbo or one from the approved list.
Request to classify Acura TL car approval
#26878 from Rich Lee · No action required · Minutes (2019-07 Fastrack)
Thank you for your letter. There is no requirement to class a car in STU if it is under 3.2L. You may compete with the TL as long as it meets all other STU regulations.
Request BRZ 100m Jackson pulley
#26667 from Kevin Koelemeyer · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. Your request is not recommended at this time. Author is asking for more horsepower and it is not warranted. The Club Racing Board will continue to monitor performance.
Request to allow K20 Honda Rotrex c38-81 S/C
#26397 from David Mead · Not recommended · Minutes (2019-07 Fastrack)
NR: Thank you for your letter. BOM for S/C Kit was requested multiple times. Competitor nor Jackson provided requested information. S/C Kits will not be permitted without BOM for kit.
Request to add Rotrex s/c to supercharged S2000 list
#26396 from David Mead · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. BOM for S/C Kit was requested multiple times. Competitor nor Jackson provided requested information. S/C Kits will not be permitted without BOM for kit.
Request Procedural feedback regarding category rule vs. spec line
#26811 from Timothy Myers · Not recommended · Minutes (2019-06 Fastrack)
Thank you for your letter. The Club Racing Board currently does not wish to classify this car for consistency. Currently the ST category has many hard lines regarding tire size, brake size, number of forward speeds. This car exceeds those hardlines. There are currently pending rules changes that may allow for this car in 2020. The Club Racing Board has chosen not to spec line the car due to lack of relative performance data.
Request 9
#26810 from Allan Ferragonio · Not recommended · Minutes (2019-06 Fastrack)
Thank you for your request. CRB doesn't recommend changing the weight based on wheel size.
Request to Clarify Manifold allowances
#26780 from Jose De Miguel · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. 9.1.4.G.1.e Is a general category rule and applies to both STL and STU. 9.1.4.1.B.3 is a STU specific rule applying only to STU and over riding 9.1.4.g.1.e.
Request to remove RWD Turbo 1% penalty
#26754 from Dave Mead · Not recommended · Minutes (2019-06 Fastrack)
Thank you for your letter. The Club Racing Board decided to remove the 1 mm of TIR from AWD due to driveline loss. The Club Racing Board decided that RWD will retain the -1mm of TIR from chart weight until further data supports its removal.
Request to Allow BMW M50B25 Engine
#25786 from Chris Itterly · Not recommended · Minutes (2019-06 Fastrack)
Thank you for your letter. Currently the Club Racing Board will not consider alternate individual throttle body (ITB) type manifolds in STU.
Opposition to recent rule changes and class direction
#26720 from Matt Wolfe · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Request to remove S54 spec line from STU
#26681 from Eric Heinrich · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Opposes BMW S54 engine
#26677 from Jose De Miguel · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Opposes BMW S54/E46 for STU
#26675 from John Weisberg · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Opposes S54 in STU
#26670 from Luis Rivera · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Request to remove BMW S54 listing from approval
#26668 from Dave Mead · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Mazda 13B Injection Throttle Body
#26650 from Raymond Philibert · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend non OE fuel injection.
Oil Pan Protective Skid Plate Allowance
#26641 from Patrick Waligore · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend. Competitor may modify pan to add ground clearance.
S54 BMW Engine
#26624 from Kevin Koelemeyer · No action required · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.
Request to Classify Subaru Turbo
#26608 from Dennis Troemel · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The club racing board does not recommend. Competitor may choose a turbo from the approved list per 9.1.4.1 H.5.
Request for update 2015 VW GTI TCA world challenge
#26473 from Travis Washay · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. Please see response to letter #25487.
Request to Classify BMW 235iR in STU
#26454 from Tim Myers · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will consider classification of the 235/240IR pending approval of rules changes for 2020.
Request for 13B Bridgeport Weight Reduction
#26568 from Luis Rivera · Not recommended · Minutes (2019-04 Fastrack)
Thank you for your letter. With recent changes to the Rotary allowances in the STU, no further changes are recommended at this time.
Request for Mazda 12A Weight Reduction
#26567 from Luis Rivera · Not recommended · Minutes (2019-04 Fastrack)
Thank you for your letter. With recent changes to the Rotary allowances in the STU, no further changes are recommended at this time.
Request for Mazda 13B Weight Reduction
#26566 from Luis Rivera · Not recommended · Minutes (2019-04 Fastrack)
Thank you for your letter. With recent changes to the Rotary allowances in the STU, no further changes are recommended at this time.
Did You Really Mean To Add Flares to STL And STU?
#26561 from Harley Kaplan · No action required · Minutes (2019-04 Fastrack)
Thank you for your letter. Please see response to Letter #26564.
Request to Classify BMW E46 M3 in STU
#26531 from Glen McCready · No action required · Minutes (2019-04 Fastrack)
Thank you for your letter. Please see response to Letter #25126 in Feb 2019 Fastrack.
Request to be added to STAC
#26519 from Kevin Boehm · No action required · Minutes (2019-04 Fastrack)
Adding Kevin Boehm to the STAC
Recommend changing the number of forward gears
#26423 from Super Touring Committee · Recommended to the Board · Minutes (2019-04 Fastrack)
In GCR section 9.1.4.1.C.2, add as follows: “Transmission and ratios are free. Forward gears are limited to 6 speeds. Cars equipped with automatic transmissions using a torque converter are limited to 8 forward speeds. Cars with sequential shift transmissions including factory DCT-type systems shall increase the required minimum weight by 3.5%.”
Recommend 6 Piston Calipers for 2020
#26422 from Super Touring Committee · Recommended to the Board · Minutes (2019-04 Fastrack)
In GCR section 9.1.4.1.E.2, add as follows: “Calipers- The standard production calipers or any 4-piston or fewer calipers may be used. 6 piston calipers may be used with a 1% weight penalty.”
Request an aftermarket turbo k24
#25519 from kevin koelemeyer · Not recommended · Minutes (2019-04 Fastrack)
Thank you for your letter. Currently the Club Racing Board does not recommend the addition of a turbo to the K24 in STU.
Request to classify a 2015 VW GTI TCA PWC
#25487 from Travis Washay · Not recommended · Minutes (2019-04 Fastrack)
Thank you for your letter. There is no requirement to specifically class cars in STU. Your car can run freely per STU regulations. Please choose a TIR and appropriate weight from the STU chart.
DI turbo prep changes for 2020
#26390 from Super Touring Committee · Member advisory · Minutes (2019-03 Fastrack)
Thank you for your letter. Starting in 2020, all Direct Injected Turbo engines will be limited in preparation. The new limits will include; stock compression, stock camshaft lift, and no porting.
13B-RE intake request
#26363 from Luis Rivera · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Please see response to letter #25564. March 2019 Technical Bulletin.
Request a 20b engine
#26362 from Luis Rivera · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The 20B engine exceeds the performance envelope of STU
Opposed to STU Advanced Aero additions
#26331 from Will Clark · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Request 9 inch wheel
#26274 from Kevin Koelemeyer · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Club Racing Board does not consider this necessary at this time.
Request Gen 2 2010 MINI Cooper S
#26139 from Ben Marouski · Member advisory · Minutes (2019-03 Fastrack)
Thank you for your letter. All turbo charged engines running either their stock or approved alternate turbo must run at chart weight for turbocharged engines. The weight is set based on turbo inlet size. You may choose a restrictor size and weight from the chart. GCR 9.1.4.1.H.6
In Favor of #25830
#26115 from Scott Peterson · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Request for Mazda Renesis Engine Street Port
#26005 from Dale Shoemaker · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Renesis engine already has ports larger than the street port template. There would be no reason to allow street porting specifically on a Renesis.
Opposes Wing and Aero Rules
#25983 from Jose De Miguel · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Opposed to Advanced Aero
#25974 from Kevin Koelemeyer · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Request to Use VTEC Cylinder Heads on All Honda B Series Engines
#25953 from Juan Catala · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. VTEC cylinder heads are not a direct install on a B20 block.
Request for 20B 2.0L Rotary Engine Classification
#25951 from Luis Rivera · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Please response to letter #26362. March 2019 Fastrack.
Request for 18x9.5 Wheel On Pontiac Solstice GXP
#25908 from William Goodro · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend increasing wheel size at this time.
Request to Classify BMW E46 M3
#25904 from David Palfenier · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Please response to letter #25126. March 2019 Technical Bulletin.
Request for Roofless EP Car Allowance
#25854 from Alex Phelps · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Club Racing Board does not feel that removing windscreen on Super Touring cars is appropriate at this time.
Request to better define (porting allowed) in 9.1.4.1 B.4
#25836 from DAVID MEAD · No action required · Minutes (2019-03 Fastrack)
Thank you for your letter. Per GCR Appendix F, ports do not include the combustion chamber.
Request to Remove 9.1.4.1.B.3 Intake Manifold Restriction
#25808 from david mead · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Please see Jan Fastrack 2019 Letter #25829
Request to classify S2000 with K24 crank
#25798 from david mead · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The Club Racing Board doesn’t support mixing and matching parts from different engine families.
Support of Advanced Aero Proposal.
#25795 from James Clay · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Support for #25785
#25788 from Christopher DeShong · No action required · Minutes (2019-03 Fastrack)
Thank you for your letter. You are permitted to make necessary modifications to body work in order to mount an air dam.
Request to Change Turbo Rules
#25787 from Chris Itterly · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. Per your request regarding 9.1.4.1.B. The Club Racing Board does not recommend this option for DI turbo charged engines at this time. Per your request regarding 9.1.4.1.H.6 Please see response to letter #26398 Per your request regarding 9.1.4.1.H.5 The TD05HR-15GK2 turbocharger was specifically permitted on the Dodge SRT4 due to it being a factory available dealer installed part. This turbo would not fit any manifold other than the SRT4 Stage 3.
Bumper Cover Clarification
#25785 from DAVID MEAD · No action required · Minutes (2019-03 Fastrack)
Thank you for your letter. The advisory committee feels the rule is clear as written.
Request for removal of class fillers in STU
#25782 from DAVID MEAD · Recommended to the Board · Minutes (2019-03 Fastrack)
In STU, remove vehicles from 9.1.4.1 table B as follows: Note from the Club Racing Board: Cars can enter under the IT allowances.
Request modification of driver’s floor pan for taller drivers
#25779 from Rob Hines · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. The Miata already has allowances for floor modification in Super Touring.
Request for Clarification on 9.1.4.c.12
#25778 from Austin Hilliard · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. Please see 9.1.4 C. Bodywork 1. Unless otherwise allowed, standard body appearance must be strictly maintained.
Opposed to Changing Aero Rules
#25776 from Austin Hilliard · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Response to letter #25540 - Please Delay New Aero Allowances
#25755 from Kevin Boehm · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
Opposed to proposed aero changes in letter #24504
#25741 from DAVID MEAD · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Your response has been logged.
24504 Amendment
#25830 from Super Touring Committee · Recommended to the Board · Minutes (2019-01 Fastrack)
Effective 1/1/19: Add to 9.1.4.1.A.3.b.: The wing may be no higher than roof height. In 9.1.4.1.A.3.a.: Adjust weight penalty for advanced aero from 3% to 5%. Change: 9.1.4. Super Touring Category Specifications C. Bodywork… 10. Fenders and wheel openings shall remain unmodified. OEM base model body fenders may be flared to allow for tire clearance up to 2” with a weight penalty of 1%. They must maintain the OEM profile and appearance, seamlessly around the wheel arch. It is permitted
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to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with plastic/ composite fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner than the basic fender material thickness. Non-metallic inner fender liners may be removed
STU Intake Manifolds
#25829 from Super Touring Committee · Recommended to the Board · Minutes (2019-01 Fastrack)
Effective 1/1/19: Add: 9.1.4.1 B. Engines 3. All cars shall use the installed engine’s stock air throttling device (e.g., throttle body, carburetor) and intake manifold, unless noted otherwise. Alternate intake manifolds will be permitted on a case-by-case basis.
Turbo Inlet Restrictor Option
#25744 from Angelica Sprehe · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your request. All turbo cars in STU have a weight based on the inlet size of their turbo. If you would like to run without a TIR, your turbo inlet diameter must be equivalent to a size on the chart. The vehicle base weight would then be the chart weight. Otherwise you must choose a restrictor size from the chart.
Request to Allow Alternate Turbos
#25725 from Jim Drago · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your letter. Please select a turbo from the approved list.