In GCR, change as follows: 9.1.2 Page 68: "GT-3U (GT3U)" 9.1.2.F page 320: "9.1.2.F. GT-2, 3, 3U LI TE CATEGORY SPECIFICATIONS" 9.1.3.9 Page 320: "9. 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 including the 225 lbs. TCR cars are ineligible for GT3/GT3U. Table B: Alternate Vehicle and Engine Allowances Page 461:
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“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."
GT3U Ride Height
#39637 from Grand Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)
In GCR, Section 9.1.2.F.3., add the following: "10. 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."
Declassify TCR Cars from GT3/GT3U
#38569 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)
In GCR Section 9.1.2.F.3.9, add 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 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 including the 225 lbs. TCR cars are ineligible for GT3/GT3U."
Clarification of GT3U
#38266 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)
In GCR 9.1.2.F.3.9., change as follows: "All GT3U (Majors and Runoffs) cars shall run at current GT3 race weight plus 150lbs. All GT3U cars shall run one of the following tire and wheel combinations: A Dot approved tire with maximum section width of 245. GT3U cars base wheel is a maximum of 15”x9”. “18”x9” wheels are allowed with a 3% weight addition. GT3 U cars utilizing 15”x7” wheels are limited to a 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 including the 225 lbs."
Correct language regarding OEM Areo Devices
#37137 from Christopher Childs · Rule change · TB 25-01 (2025-01 Fastrack)
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, B.2.c., change as follows: "B. Aerodynamic Devices 2. Rear wing c. The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level with, or below, the peak of the roof. OEM aerodynamic devices do not need to adhere to the height rule."
A specification table follows in the original; it is not shown here.
VW Funcap weight
#37217 from John Mills · Rule change · TB 25-01 (2025-01 Fastrack)
In GT3 Spec Lines, GT3 Engines - VOLKSWAGON, “Fun Cup” Beetle Sealed, add to Weight (lbs) as follows: "Shall be exempt from consolidation add-on weight of 150 lbs."
Pontiac Weight and Chassis Adjustment Request
#36938 from Andrew Lott · Rule change · TB 24-12 (2024-12 Fastrack)
In GT3 Engines - PONTIAC Spec Lines, LE5 Ecotech, change Weight as follows: "2345 lbs. 2195 lbs."
GCR GT3 Disfranchised GT2
#36291 from Richard Smith · Rule change · TB 24-09 (2024-09 Fastrack)
In GT3 Spec Lines, Engines - MAZDA, Engine Family 13B Bridgeport, change as follows: Weight: "(Effective 11/1/2024) 2350 2275" Notes: "(Effective 11/1/2024) Disfranchised GT2*add 75 lbs." In GT3 Spec Lines, Engines - MAZDA, Engine Family 13B Peripheral Port, change as follows: Weight: "(Effective 11/1/2024) 2350 2275" Notes: "(Effective 11/1/2024) Disfranchised GT2*add 75 lbs."
Nissan MR20DE Engine Classification Request for GT3
In GT3-TCR Spec Lines, Mazda, classify 3TC as follows: TCR - MAZDA Make Model Trans Power
A specification table follows in the original; it is not shown here.
Adding Datsun B110 to List of Approved Cars
#36198 from Vaughn Cooper · Rule change · TB 24-08 (2024-08 Fastrack)
In GT3 Spec Lines, classify GT3 Cars - Nissan 1200 (B110) as follows: GT3 Cars - Nissan Model Years Body Style Drive- line Wheel- base (in) Notes 1200 (B110) 70-73 2dr RWD 90.6 Must use an engine that is already classified to run in GT3 or may request an alternate Nissan (Datsun)
In GT3-TCR Spec Lines, change Weight as follows: Audi RS3 LMS (16-20) SEQ: "31773077" Audi RS3 LMS (16-20) DSG: "31003000" Honda Civic Type R (16-20) SEQ: "32103110" Hyundai I30N (16-20) SEQ: "3254 3154" Volkswagen GTI (16-20) SEQ: "3177 3077"
Correct missed Disenfranchised weight reduction
#36237 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)
In GT3 Cars - PONTIAC, Sunfire GT, change Notes as follows: "150 75"
errors & omissions on GT3 Mazda MZR spec lines
#36241 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)
In GT3 Spec Lines, GT3 Engines - MAZDA, MZR, eliminate 2nd DOHC in its entirety and change Fuel Induction as follows: "Unrestricted"
GT3 +1mm SIR add 175lbs. In
#36098 from Grand Touring Committee · Rule change · TB 24-06 (2024-06 Fastrack)
GCR, Section 9.1.2.F.7. add the following: "m. GT3 Rules Concerning Alternate Weights and SIRs. 1. Traditional GT3 cars that that are currently required to run an SIR may run +1mm above spec line listed size size with a 175lb. weight penalty. 2. Competitors running the alternate SIR must display "+1.mm" on the side of their car next to the new weight."
Revised GT3 Built Turbocharged chart
#36100 from Grand Touring Committee · Rule change · TB 24-06 (2024-06 Fastrack)
In GCR, Section GT3 9.1.2.13.h.6. GT3 Turbocharger Built Engines, update Chart as follows: "Engine Displacement Valves / cyl Restrictor Weight Notes <1400 4 33 mm 2100 1401-1850 4 35 mm 34 mm 2350 2250 1401-1850 4 35 mm 2350"
In GCR Section 9.1.2.G (GTA Category Specifications), change as follows: “9.1.2.G.III.I The single-plane rear spoiler must be mounted at an angel angle from 50 to 75 degrees (perpendicular to the ground being 90 degrees) and may not extend beyond the rear bumper when viewed from directly above the rear bumper. Spoilers must be a minimum of .063 aluminum or Lexan and may vary in overall height to match the contours of the bodywork. The rear spoiler dimensions shall not exceed 59.0 inches wide by 5.0 inches in height, (measured on the material surface) , or 295.0 square inches total surface area. Braces to prevent spoiler deflection are allowed, but may serve no other purpose.”
GT Direct Injection allowance and rules
#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR, Section 9.1.2.F.7.5.E. change as follows: “Direct Injection is not permitted only if it came OE and must be installed using only OE high pressure pump(s), hard and soft hoses and injectors.”
Request to Include Toyota FA24D Engine for use in GT3
#35199 from Erik Madsen Madsen · Rule change · TB 24-02 (2024-02 Fastrack)
In GT3 Engines - Toyota, classify the FA24D as follows: see attachment GT3 Engines - TOYOTA
A specification table follows in the original; it is not shown here.
GT2/3 remove Direction Injection not allowed in Spec line notes
#35439 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)
In GT2/3 modify Spec Line notes as follows: GT2: Nissan: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” GT3: Mazda: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” Mitsubishi 4G93: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E. ” Nissan QR25DE/DD 1988cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” Nissan QE25DE/DD 2489cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
Edit GT3 Nissan QR25DE/DD spec line
#35442 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)
In GT3 Engines - Nissan QR25DE/DD, change as follows: 11111’QR25 0DE/DD”
Disenfranchised GT2 RX7.
#35028 from Richard Smith · Rule change · TB 24-01 (2024-01 Fastrack)
In GT3 Spec Lines, reduce all disenfranchised GT2 cars from 150 lbs to 75 lbs.GT3 MAZDA: Body: RX7 NA 2 DR. RWD 95.3 / 95.5 / 95.7 SP – Please review and provide appropriate layout for GCR. In GT3 Spec Lines, Engines - MAZDA, add to Notes as follows: 12A Peripheral Port at 2300 lbs.: "Disenfranchised GT2* add 75 lbs." 13B Bridgeport: "Disfranchised GT2 add 75 lbs." 13B Peripheral Port: "Disfranchised GT2 add 75 lbs."
Turbo Help
#35042 from Chris Edens · Rule change · TB 24-01 (2024-01 Fastrack)
In GT3 Engines - Mazda Spec Lines, Mazda BP4W Turbocharged OEM engine, change Weight as follows: "2060 1960"
Competition Adjustment Request for 13B Peripheral Port
In GT3 Engines - MAZDA Spec Lines, 13B Peripheral Port, change Weight as follows: "2200 2100"
Request to Include Toyota GR 86 in GT3
#35197 from Erik Madsen Madsen · Rule change · TB 24-01 (2024-01 Fastrack)
In GT3 Cars - TOYOTA Spec Lines, classify DR86 as follows: GT3 Cars - TOYOTA Model Years Body Style Driveline Wheelbase (in) Notes DR86 2021-2024 2 DR RWD 101.3
In GT3 TOYOTA Engines, classify Toyota 3S as follows: GT3 TOYOTA Engines -
A specification table follows in the original; it is not shown here.
GT3 2.0L SIR & weight
#35171 from Grand Touring Committee · Rule change · TB 23-12 (2023-09 Fastrack)
In GT3 Spec Lines, GT3 Cars, change as follows: "Acura F20C 1997cc 32mm SIR May run unrestricted at 2195lbs. K20A 1988cc 32mm SIR May run unrestricted at 2195lbs. Audi 1984cc 32mm SIR May run unrestricted at 2195lbs. BMW 1895cc 32mm SIR May run unrestricted at 2195lbs. Chevrolet 1998cc 32mm SIR May run unrestricted at 2195lbs. Chrysler/Dodge/Plymouth 1997cc 32mm SIR May run unrestricted at 2195lbs. Ginetta MZR 1999cc 32mm SIR May run unrestricted at 2195lbs.
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Honda F20C 1997cc 32mm SIR May run unrestricted at 2195lbs. K20A 1988cc 32mm SIR May run unrestricted at 2195lbs. Mazda MZR 1999cc 32mm SIR May run unrestricted at 2195lbs. Mitsubishi/Eagle 1997cc 32mm SIR May run unrestricted at 2195lbs. Nissan QR25DE/DD 1988cc 32mm SIR May run unrestricted at 2195lbs. SAAB 1985cc 32mm SIR May run unrestricted at 2195lbs. VOLKSWAGON 1984cc 32mm SIR May run unrestricted at 2195lbs.
Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules
#34453 from David Gomberg · Rule change · TB 23-12 (2023-12 Fastrack)
from the current (or before) Table of Contents (TOC), to what is shown in the after TOC. GTL spec lines will now be contiguous with GT2 and 3 spec lines. GTA category and spec lines will be moved and renumbered behind GTL. GTA Section will not change but page numbers will, (as shown in Red italics). 9.1.2.F. GT-2, 3, LITE Category Specifications 314 GT2 Cars 327 GT2/ST 341 GT3 Cars 348
In GT3 Engines - HONDA, classify B20 as follows: GT3 Engines - HONDA
A specification table follows in the original; it is not shown here.
Addendum to letter 33913, GT3 DOT tires.
#34627 from Grand Touring Committee · Rule change · TB 23-08 (2023-05 Fastrack)
In GCR section 9.1.2.F.7.c.10.b, add the following: "Any racing tire including DOT is allowed in GT3. Cars using 15” American Racer 23.5-10.0-15, bias ply, non-belted tire may do so without the weight penalty."
Please classify Fields Cardinal V8
#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)
In GT Spec Lines, GT1 Cars - Fields Cardinal, classify Fields Cardinal V8 as follows: GT1 Cars – Fields Cardinal Model Years Body Style Drive- line Wheel- base (in) Notes Fields Cardinal V8 2023 2 Dr. RWD 92.0 Roll Cage MUST be modified to comply with
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GCR Section 9.4. In GT Spec Lines, GT1Engines - classify Ford V8 as follows: GT1 Engines - Ford Engine Family Engine Type Bore x
A specification table follows in the original; it is not shown here.
Remove Nissan VG30 engine from GT3
#33609 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT3 Spec Lines, Engines - NISSAN, VG30, remove Spec Line in its entirety.
GT3 Choke option effective 1-01-2023
#33669 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2, 3, LITE Category Specifications, GCR Section 9.1.2.F.13.m., add the following: " For GT3 only: 1. As an option, induction system "Chokes" may be used where a SIR is required. Said chokes shall be fitted to each barrel of carburetor/throttle body and all airflow into engine must pass through them. Choke size will be the same as listed SIR unless noted. This option is for normally aspirated cars with SIRs only and does not apply to turbo cars with TIRs."
GT3 2.0L choke/weight option
#33670 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2, 3, LITE Category Specifications, GCR Section 9.1.2.F.13.m., add the following: “2. All 2.0 liter 4-valve non-turbo engines currently listed in GT3 shall be permitted to run without any restriction (SIR or chokes) at 2060lbs.”
Turbocharged Engine Rules
#33145 from Michael Heintzman · Rule change · TB 22-12 (2022-12 Fastrack)
In GT3 Engines - Mazda Spec Lines, Mazda BP4W Turbocharged OEM engine, add the following: GT3 Engines - Mazda
A specification table follows in the original; it is not shown here.
In GCR Appendix L-TA2 rules, Addendum A, change A.2. as follows: "The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or #3870." In GTA, GCR Section 9.1.2.G.3., change as follows: "The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or #3870."
GT3 Nissian SR20VET unrestricted ECU change
#33432 from Grand Touring Committee · Rule change · TB 22-12 (2022-12 Fastrack)
#33091 from James Rogerson · Rule change · TB 22-11 (2022-11 Fastrack)
In GT3 Spec Lines, HONDA GT3 Cars, add as follows: HONDA GT3 Cars - Model Years Body Style Drive-line Wheel-base (in) Notes Civic 84-87 3dr FWD 86.6 Hood bulge allowed, no openings.
GT3 Turbo Displacement Clarification
#32952 from Chris Edens · Rule change · TB 22-10 (2022-10 Fastrack)
In GT Category Specifications, GCR Section 9.1.2.E.13.l.3., change Engine Displacement (cc) as follows: "1401-1800 50"
Tail lights on all GT category race cars.
#32799 from John Mills · Rule change · TB 22-09 (2022-09 Fastrack)
In GT, GCR Section 9.1.2.F.7.a.6: "Glass and/or plastic headlights, front parking lights, front signal lights, lenses, and bulbs shall be removed. Headlight openings shall be covered with a wire mesh screen or panel having the same contour as the original lens, mounted so that the headlight bezel/rim remains in place, maintaining the standard appearance of the Production automobile. Side marker light assemblies shall be removed and the resulting openings covered with a plate whose dimensions do not exceed those of the original parts; side marker lights that are an integral part of the taillight assembly cannot be removed. Other lighting parts and operating mechanisms may be removed. In the case of pop-up headlights, the entire assembly may be removed and the opening covered with a screen or plate (as above, without the headlight bezel/rim requirement) which provides a stock appearance. It is not
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permitted to relocate the standard headlight, parking light, signal light, etc., openings. Traditional GT cars only. Not allowed with any "Spec Car, GT2-ST, or any other added non Traditional GT car. Taillights shall be in the original location and shall may be the original style/type of taillight for the make, model, and year of car. A rear body panel having the same contour as the original lens area and in the original location, may be fitted with a tail-light graphic of the original style/type frame/lens adhered to it. If side marker lights are an integral part of the tail-light assembly they must be represented by the panel graphic. These panel/graphics shall have a functioning red LED lamp assembly fitted through them on both sides of the car to serve as brake lights. A 15-watt or equivalent rain light may be included with-in this LED assembly or may be a separately mounted single or dual LED assembly."
SR20VET Engine Option Request
#32648 from David Muramoto · Rule change · TB 22-08 (2022-08 Fastrack)
In GT3 Engines, Nissan, classify SR20VET Limited Prep-Turbocharged OEM Engine as follows: GT3 Engines - NISSAN Engine Family Engine
A specification table follows in the original; it is not shown here.
Correct Model GT3 - Fiat
#32776 from Club Racing Board · Rule change · TB 22-07 (2022-07 Fastrack)
In GT3 Spec Lines, Cars - Fiat, change model as follows: "124 Spider Pinnafarina Pininfarina Spider"
Correct Fiat Spider Years
#32149 from Daniel Snow · Rule change · TB 22-06 (2022-06 Fastrack)
In GT3 Cars - FIAT Spec Lines, classify 124 Spider Pinnafarina Spider as follows: GT3 Cars - FIAT Model Years Body Style Drive-line Wheel-base (in) Notes
wheel size addition
#32247 from Grand Touring Committee · Rule change · TB 22-05 (2022-04 Fastrack)
In Grand Touring Category Specifications, GCR Section 9.1.2.F.10.b, change as follows: "The maximum wheel size for GT3 cars is 15 x 7”. Alternatively: GT3 cars may run up to a maximum 17" x 9" wheel with a weight penalty equal to three (3) percent of the car's weight as listed on the specification line. The maximum vehicle weight shall be rounded to the nearest pound. Alternatively, a Additionally: Any wheel up to 18” with a maximum tire cross section of 12.0” and a maximum tire diameter of 26.0” may be used with a weight penalty equal to eight five (5) percent of the car’s weight as listed on the specification line. The minimum vehicle weight shall be rounded to the nearest pound. A maximum brake rotor diameter of 13.0” may be used with alternate wheels. Cars using 15” American Racer 23.5- 10.0-15, bias ply, non-belted tire may do so without the weight penalty."
GT3 TCR Car Feedback
#31677 from Tim Myers · Rule change · TB 22-04 (2022-04 Fastrack)
In GT3 Spec Lines, GT3-TCR, change as follows: Make/Model Audi RS3 LMS (2016-2020) SEQ: Power Level: "100% 90%" Weight: "3175 3177" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only." Make/Model Audi RS3 LMS (2016-2020) DSG: Power Level: "100% 90%" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only."
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Make/Model Honda Civic Type R (2016-2020): Power Level: "100% 90%" Weight: "3200 3210" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only." Make/Model Hyundai I30N (2016-2020): Power Level: "100% 90%" Weight: "3200 3254" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only." Make/Model Volkswagen Golf GTI (2016-2020) SEQ: Power Level: "100% 90%" Weight: "3175 3177" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only." Make/Model Volkswagen Golf GTI (2016-2020) DSG: Power Level: "100% 97.5%" Notes: "Must use 200 tread wear tires. No tire shaving permitted. Stock TCR wheels only."
Request to Classify Ginetta G40 in GT3
#31598 from Richard Gray · Rule change · TB 22-03 (2022-03 Fastrack)
In GT3 Cars - Ginetta, classify Ginetta G40 as follows: GT3 Cars - GINETTA Model Years Body Style Drive- line Wheel- base (in) Notes Ginetta G40 2010-
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Present 2 Door Coupe RWD 88.6 Must comply with all GT3 rules except as noted on spec line. May use FIA roll cage. Must have complete build specs in possession at all race events. In GT3 Engines - Ginetta (Ford/Mazda), as follows: GT3 Engines – GINETTA (Ford/Mazda) Engine Family Bore x Stroke (mm) Disp. (CC) Head Type Valves / Cyl. Fuel Induction Weight (lbs) Notes
A specification table follows in the original; it is not shown here.
Normally Aspirated 2.0L DOHC MZR Motor
#31733 from Michael Heintzman · Rule change · TB 22-03 (2022-03 Fastrack)
In GT3 Engines, classify MAZDA MZR as follows:
A specification table follows in the original; it is not shown here.
Volvo S60 in GT3
#31970 from Sam Moore · Rule change · TB 22-03 (2022-03 Fastrack)
In GT3 Cars - Volvo, classify Volvo S60 as follows: GT3 Cars - VOLVO Model Years Body Style Drive-line Wheel-base (in) Notes Volvo S60 2000-2009 4 Door Sports Coupe FWD 106.9
GT3 2.0L 4V engines now unrestricted.
#32190 from Grand Touring Committee · Rule change · TB 22-03 (2022-03 Fastrack)
In GT3 Engines Spec Lines, add to Notes the following: Acura F20C 1997cc: "May run unrestricted at 2195 lbs." Acura K20A 1998cc: "May run unrestricted at 2195 lbs." Audi 1984cc: "May run unrestricted at 2195 lbs." BMW 1895cc: "May run unrestricted at 2195 lbs." Chevrolet 1998cc: "May run unrestricted at 2195 lbs." Chrysler/Dodge/Plymouth 1997cc: "May run unrestricted at 2195 lbs." "Ginetta 1999cc: May run unrestricted at 2195 lbs."
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Honda F20C 1997cc: "May run unrestricted at 2195 lbs." Honda K20A 1998cc: "May run unrestricted at 2195 lbs." Mazda 1999cc: "May run unrestricted at 2195 lbs." Mitsubishi/Eagle 1997cc: "May run unrestricted at 2195 lbs." Nissan QR25DE/DD 1998cc: "May run unrestricted at 2195 lbs." Nissan SR20-DE/VE: "May run unrestricted at 2195 lbs." Saab 1985cc: "May run unrestricted at 2195 lbs." Volkswagen1984cc: "May run unrestricted at 2195 lbs."
TB correction to wing wording
#32191 from Grand Touring Committee · Rule change · TB 22-03 (2022-03 Fastrack)
In GCR, Section 9.1.2.F.7.b.12.E., change the following: "A single element, single plane airfoil scaled up to a maximum chord length of 10.75 inches."
Request to add Fiat to GT3 CARS
#31803 from Daniel Snow · Rule change · TB 22-02 (2022-02 Fastrack)
In GT3 Spec Lines, classify Fiat Spider 2000, Years 79-81, as follows: GT3 Cars - FIAT Model Years Body Style Drive-line Wheel-base (in) Notes Fiat Spider 2000 79-81 RWD 89.76”
Request to add Fiat to GT3 CARS
#31804 from Daniel Snow · Rule change · TB 22-02 (2022-02 Fastrack)
In GT3 Spec Lines, classify Fiat X-19, Years 72-89, as follows: GT3 Cars - Model Years Body Style Drive-line Wheel-base (in) Notes
31032 correction to weight
#31525 from Grand Touring Committee · Rule change · TB 21-12 (2021-12 Fastrack)
In GT3 Spec Lines, Engines - Volkswagen, “Fun Cup” Beetle Sealed, change weight as follows: "2060 1850"
Add TCR cars to GT3
#31540 from Grand Touring Committee · Rule change · TB 21-12 (2021-12 Fastrack)
In GT3 Spec Lines, classify TCR cars as follows: GT3-TCR Make Model Trans Power Level Weight (lbs) Notes Audi RS3 LMS (2016-2020) SEQ 100% 3175 Must use 200 tread wear tires Audi RS3 LMS (2016-2020)
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DSG 100% 3100 Must use 200 tread wear tires Honda Civic Type R (2016-2020) SEQ 100% 3200 Must use 200 tread wear tires Hyundai I30N (2016-2020) SEQ 100% 3200 Must use 200 tread wear tires Volkswagen Golf GTI (2016-2020) SEQ 100% 3175 Must use 200 tread wear tires Volkswagen Golf GTI (2016-2020) DSG 100% 3100 Must use 200 tread wear tires
Please approve 1964-1968 Ford Cortina GT for competition in GT#
In GT3 Cars - Ford, classify Ford Cortina GT as follows effective 11/1/2021: GT3 Cars - Ford Model Years Body Style Drive- line Wheel- base (in) Notes Ford Cortina GT 64-68 2dr. RWD 98.0 “
In GCR, Section 9.1.2.G.16., change as follows: "0-80541-1 0-80541-2" In GCR, Section 9.1.2.G., Appendix Z 5.a. change as follows: "0-80541-1 0-80541-2" In GCR, TA2 Appendix B.3.4, change as follows: "#6010 6014X"
Request to Permit FP cars in GT3
#30611 from Matt Wolfe · Rule change · TB 21-07 (2021-07 Fastrack)
In GCR, Section 9.1.2.F.3. add the following: "8. Current FP spec line cars may compete in GT3 as long as they maintain their full FP rule set."
Mazda MZR 2.0L Engine
#30455 from Michael Heintzman · Rule change · TB 21-05 (2021-05 Fastrack)
In GT3 Engines - MAZDA, MZR DOHC 87.38, change Fuel Induction as follows: "31 32"
Disfranchised GT3 Mazda, correct choke size
#30570 from Grand Touring Committee · Rule change · TB 21-05 (2021-05 Fastrack)
In GT3 Engines - MAZDA, Renesis Bridgeport, change Fuel Induction as follows: "44 2mm" In GT3 Engines - MAZDA, 13B Bridgeport, change Fuel Induction as follows: "44 2mm"
Mazda MZR SIR Sizing
#29555 from Christopher Howard · Rule change · TB 20-12 (2020-12 Fastrack)
In GT3, GT3 Engines - MAZDA, MZR, change Fuel Induction as follows: "31 32" In GT3, GT3 Engines - MAZDA, MZR/L5-VE, change Fuel Induction as follows: "31 32"
Request to Classify 1992-1997 Honda Prelude
#29687 from Keith Gillespie · Rule change · TB 20-12 (2020-12 Fastrack)
In GT3 Cars - HONDA, classify Honda Prelude as follows: GT3 Cars - HONDA Model Years Body Style Drive-line Wheel-base (in) Notes Prelude 1992-1997 2dr FWD 104”
In Appendix L TA2 Rules, clarify wording as follows: “4.8.4.1.10.1.1: The maximum height of the wing, including end plates and wicker Gurney flap, can be no greater than the highest point on the roof. The roof may not be altered or pushed up to increase its height.” “4.8.4.1.10.1.5: The wing end plates must fit within a rectangle measuring 11.00 inches long by 4.00 inches tall. All wing elements, including the wicker bill Gurney flap, must be kept within the profile of the end plates. The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground. Endplates must be flat, with no curvature or Gurney tabs flap. “
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“4.8.4.1.10.1.6: A wicker bill (Gurney) Gurney flap may be added to the wing element. It must be a uniform shape across the complete width of the wing. No air may pass between the wicker bill Gurney flap and the wing. It must form a 90 degree angle with the wing surface. The size of the wicker bill Gurney flap cannot exceed 0.50 inch high as measured from the wing surface. The thickness of the wicker Gurney flap material must be 0.625 inch.” “4.8.4.1.10.2.4: The dog leg style Howe endplates must be used without modification. All wing elements, including the wicker bill Gurney flap, must be kept within the profile of the end plates. The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground. Endplates must be flat, with no curvature or Gurney tabs flap. “ “4.8.4.1.10.2.5: A wicker bill (Gurney) Gurney flap may be added to the upper wing element. It must be a uniform shape across the complete width of the wing. No air may pass between the wicker bill Gurney flap and the wing. It must form a 90 degree angle with the wing surface. The size of the wicker bill Gurney flap cannot exceed 0.375 inch. The thickness of the wicker bill Gurney flap must be 0.0625 inches.” “4.8.4.2.10.3.4: The dog leg style Howe endplates must be used without modification. All wing elements, including the wicker bill Gurney flap, must be kept within the profile of the end plates. The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground. Endplates must be flat, with no curvature or Gurney tabs flap. “ “4.8.4.2.10.3.5: A wicker bill (Gurney flap) Gurney flap may be added to the upper wing element. It must be a uniform shape across the complete width of the wing, and must be kept within the profile of the end plates. It must form a 90 degree angle with the wing surface. The size of the wicker bill Gurney flap cannot exceed 0.375 inch high as measured from the wing surface. The thickness of the wicker Gurney flap material must be 0.0625 inch.”
In Appendix K, STO, clarify wording as follows: B.2.a.: "Wings shall be a single element with a maximum chord length of 12.00 inches, including any wicker Gurney flap." B.2.c.: "The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be mounted level with, or below, the peak of the roof."
In GT, GCR section 9.1.2.F.7.b.12., clarify Gurney flap as follows: "D. The use of fences, end rails, Gurney flaps, wickerbills,or other forward facing lips or aerodynamic devices is prohibited." "E. A maximum 0.50 inch Gurney tab flap is allowed at the trailing edge of the wing element. The tab must be mounted 90 degrees to the upper wing surface. No air may pass between the tab and the wing. The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground. Endplates must be flat, with no curvature or Gurney tabs flaps." "GT3: The maximum width of the entire wing assembly (wing element, endplates, Gurney tab flap and
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mounting hardware) is 64.00 inches, but no wider than the rear body width including fender flares." In GT, GCR section 9.1.2.F.7.b.13., clarify Gurney flap as follows: "A. Endplates must be flat, with no curvature or Gurney tabs flap. A maximum 0.5-inch wicker- bill Gurney flap may be employed." In GT, GCR section 9.1.2.F.7.b.15.D., clarify Gurney flap as follows: "2. Rear Wing: Wings shall be a single element with a maximum chord length of 12.00 inches, including any wicker Gurney flap." "4. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be mounted level with, or below, the peak of the roof."
GT3 4v SIR size increase.
#28931 from Grand Touring Committee · Rule change · TB 20-07 (2020-07 Fastrack)
In GT3, Spec Lines, 4v, 4 cylinder pistons engines with SIR, change Fuel Induction as follows: ACURA F20C: "31 32" K20A: "31 32" K24: "31 32" AUDI DOHC w/1984cc: "31 32" BMW
A specification table follows in the original; it is not shown here.
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 Nissan KA24E specifications
#28808 from Roger Welling · Rule change · TB 20-06 (2020-06 Fastrack)
In GT3, Engines - NISSAN, KA24E, change as follows: "For 2011-2012 only, may use 32mm chokes at 2280 lbs.'
Error Regarding Mazda Engine Listing
#28119 from Sam Fouse · Rule change · TB 20-03 (2020-03 Fastrack)
In GT3, Mazda MZR L5-VE, Fuel Induction, change spec line as follows: "Unrestricted 31mm SIR" In GT3, Mazda MZR L5-VE, Weight, change spec line as follows: "1950 2195" In GT3, Mazda MZR L5-VE, Notes, change spec line as follows: "Limited to GT2 engine prep levels based on standard bore and stroke - no direct Injection. Direct injection not permitted. Allow 2.3L 94.0 mm stroke crankshaft with displacement of 2339cc." In GT2 Engines - Mazda, classify the MZR/L5-VE engine as follows:
A specification table follows in the original; it is not shown here.
In GCR section 9.1.2.F.6.c.1, add as follows: Alternatively, the bottom may be captured in a channel. "No clips or straps are required if bonded-glass factory windshields and/or rear windows are attached to chassis per original specifications (i.e., glass-bonding adhesive).”
Request Factory Five Daytona coupe classification
#26308 from Andrew Wickline · Rule change · TB 20-01 (2020-01 Fastrack)
In GTX - MISC., Classify and add as follows: GTX – MISC. Make Model Engine Restrictor mm Weight (lbs) Notes Factory Five Type 65 Coupe R Ford 302/351
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NA 2600 Factory Five Type 65
A specification table follows in the original; it is not shown here.
Request restrictor size change request
#26958 from Chad BACON · Rule change · TB 20-01 (2020-01 Fastrack)
In GT3 Engine Table, Mazda 13B Bridgeport, change Fuel Induction as follows: "44mm 42mm"
In GT3, classify the Alfa 4C as follows: GT3 Turbocharged OEM Engines:
A specification table follows in the original; it is not shown here.
Request for Mazda 2.5l MZR/L5-VE
#27570 from Alex Phelps · Rule change · TB 20-01 (2020-01 Fastrack)
In GT3 Engines, Mazda MZR/L5-VE, change Fuel Induction as follows: "31mm SIR Unrestricted" In GT3 Engines, Mazda MZR/L5-VE, change Weight as follows: "2195 1950" In GT3 Engines, Mazda MZR/L5-VE, change Notes as follows: "Direct injection not permitted. Allow 2.3L 94.0 mm stroke crankshaft with displacement of 2339cc Limited to GT2 engine prep levels based on standard bore and stroke - no direct Injection."
GT3 turbo engines add Honda
#28033 from Grand Touring Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In GT3, classify the Honda K20C1 as follows: GT3 Turbocharged OEM Engines:
A specification table follows in the original; it is not shown here.
GT3 wing end plate
#28035 from Grand Touring Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In GCR, section 9.1.2.F.7.b.12.E., make changes as follows: "The wing end plates must fit within a rectangle measuring 11.00 inches long by 4.00 inches tall. may be no more than 64 square inches."
Request to Add SR16VE to GT-3 Spec Lines
#27357 from Dan Wold · Rule change · TB 19-12 (2019-12 Fastrack)
In GT3, Nissan, add new engine as follows: GT3 Engines - Nissan
A specification table follows in the original; it is not shown here.
Requesting Increase in Choke Diameter for Mazda 12A Bridgeport
#27043 from Guy Laidig · Rule change · TB 19-09 (2019-09 Fastrack)
In GT3, Mazda 12A Bridge Port, add to the notes as follows: "Optional choke size 42mm @2010lbs."
Request GTX Fuel injection for previous GT-1 tube frame cars
#26141 from Michael Major · Rule change · TB 19-05 (2019-05 Fastrack)
In GTX, GCR section 9.1.2.H.I.3, add throttle body size as follows: “GTX tube frame cars may install fuel injection system, maximum throttle body size TBD 90mm.”
In GTX, classify the Ligier JS2 R as follows: GTX- MISCModel Homologation Model Restrictor Weight Notes
26076 revised Spec line chart
#26528 from Grand Touring Committee · Rule change · TB 19-04 (2019-04 Fastrack)
In GT3, delete Mazda 13B and Renesis spec lines and replace with new spec lines as follows: GT3 Engines - Engine Family Engine Type Disp. (cc) Fuel Induction Weight (lbs) Notes 13B Peripheral Port
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2616 37mm SIR 2400 Disenfranchised GT2 13B Bridgeport 2616 (1) Auto-Type 2 bbl. w/44mm choke(s) 2400 Disenfranchised GT2 Renesis Peripheral Port 2626 37mm SIR 2450 Renesis Bridgeport 2616 (1) Auto-Type 2 bbl. w/44mm choke(s) 2450 GT3 Engines - Engine Family Engine Type Disp. (cc) Fuel Induction Weight (lbs) Notes 13B Streetport 2616 Unrestricted 2080 13B Bridgeport 2616 (1) Auto-Type 2 bbl. w/44mm choke(s) 2200 13B Peripheral Port 2616 37mm SIR 2200 Renesis Street Port 2616 Unrestricted 2130 Renesis Bridgeport 2616 (1) Auto-Type 2 bbl. w/44mm choke(s) 2250 Renesis Peripheral Port 2616 37mm SIR 2250 13B Bridgeport 2616 (1) Auto-Type 2 bbl. w/44mm choke(s) 2350 Disenfranchised GT2* 13B Peripheral Port 2616 37mm SIR 2350 Disenfranchised GT2*
In GT1, GCR section 9.1.2.D.5.a.1, omit ride height and re-number section as follows: “a. Ride Height 1. No part of the car to the rear of the front tire opening, including the exhaust, may touch the ground when two (2) tires on the same side of the vehicle are deflated.” In GT-2, 3, LITE, GCR section 9.1.2.F.7.b, remove and re-number section as follows: “3. No part of the bodywork or chassis, to the rear of the front wheel opening, shall touch the ground when both tires on the same side of the car are deflated.”
Request clarification on bridge porting for rotary
#26076 from Luis Rivera · Rule change · TB 19-03 (2019-03 Fastrack)
In GT3, delete 13B and Renesis spec lines and replace with new spec lines as follows: GT3 Engines - MazdaEngine
A specification table follows in the original; it is not shown here.
A specification table follows in the original; it is not shown here.
GTX Homologation table update
#26034 from Club Racing Board · Rule change · TB 19-01 (2019-01 Fastrack)
In GTX, FIA GT3, classify the Audi R8, BMW Z4, and Ferrari 488 Challenge as follows: FIA GT3 - Make Homologation Model Restrictor mm Weight (lbs) Notes Acura GT3- 047 NSX (2) 35 TIR 3015 Aston Martin GT3-O32 Vantage (2) 41.5 2980 Audi GT3-017 R8 (2) 40 TIR 2900 Audi GT3-038 R8 LMS (2) 39 TIR 2980
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Bentley GT3-035 Continental (2) 38 TIR 3070 BMW GT3-043 M6 (2) 34 TIR TBD BMW GT3-023 Z4 70 2800 Chevrolet GT3-045 Corvette C7 52 3070 Dodge GT3-036 Viper (2) 39 3120 Ferrari GT3-029 458 (2) 40 3025 Ferrari GT3-044 488 (2) 35 TIR 3025 Lamborghini GT3-040 Huracan (2) 39 TIR 3015 Mclaren GT3-037 650S (2) 36 TIR 2915 Mercedes GT3-042 AMG GT (2) 34.5 TIR 3090 Porsche GT3-041 991 (2) 41.5 2960 Nissan GT3-030 GT-R (2) 40 TIR 3050
A specification table follows in the original; it is not shown here.
Other letters
Rule Changes
#39635 from Warren Montague · Not recommended · Minutes (2026-08 Fastrack)
The 75 lbs. STU using GT3U rule set cannot be removed. The RRCC will continue to monitor this class. GT3 Regional does not have the 75lb. weight add-on for the 2.0 Liter.
Response to letter 37919
#37950 from Armen Megregian · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. The balance of performance (BOP) is based on the performance potential of any car in any given class.
12/11/24- Racing Memo RM 24-09 GT3 Regional Class, GT3U Majors R
#37636 from Joseph Steinman · Taken care of · Minutes (2025-06 Fastrack)
Thank you for your letter. Please see letter #38268 in May 2025 Fastrack.
Rename it GTU
#36703 from Taz Harvey · Taken care of · Minutes (2025-02 Fastrack)
Thank you for your letter. The CRB has designated this class as GT3U Majors/Runoffs Class for 2025
Add choke size wording to GCR
#36511 from Ken Gassin · Recommended to the Board · Minutes (2024-09 Fastrack)
In GCR, Section 9.1.2.F.7.k., change the following: "k. GTLite Rules Concerning Alternate Weights, Chokes and SIRs" In GCR, Section 9.1.2.F.7.k., add the following: "Competitors running the alternate choke option must display the word "CHOKE" as well as size in mm next to the weight."
GT3 Mazda Weight Reduction
#36461 from George Cichon · Not recommended · Minutes (2024-09 Fastrack)
Thank you for your letter. The CRB believes the current weight to be correct and will continue to monitor the class.
Pontiac Sunfire GT3
#36180 from Andrew Lott · Taken care of · Minutes (2024-07 Fastrack)
Thank you for your letter. We recently reduced the weights on Disenfranchised GT2 cars and yours got missed! We are truly sorry!
Request to Classify Mitsubishi 4G69 Unrestricted
#36115 from Ricardo Velez · Not recommended · Minutes (2024-07 Fastrack)
Thank you for your letter. This car is allowed to run the "Choke Option" rather than an SIR. The CRB believes the listed weight to be correct.
Allow the Civic TCR a Chance
#35806 from Taz Harvey · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. Please see the CRB response to your earlier request letter #35482 in current Fastrack.
Honda TCR Weight
#35482 from Taz Harvey · Not recommended · Minutes (2024-05 Fastrack)
Thank you for your letter. The CRB will continue to monitor SCCA collected data.
Honda Civic SI 2007 SIR Restrictor Size
#35480 from Carlos Colon · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. Please see the CRB response to letter #36098 in current Fastrack.
Adding BSPEC cars and engines to GTL
#35228 from Jonathan Stalzer · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. As an already classified SCCA class with rules of their own the Bspec cars do not comply with the GTL rules.
9.1.2.10 Sequential Shifted Transmission Request
#35196 from Erik Madsen Madsen · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The CRB feels that this request is inappropriate for the class.
GT Committee Application and Resume
#35118 from Ken Gassin · Member feedback requested · Minutes (2024-01 Fastrack)
Thank you for your resume. The GTAC would like to accept your offer to join the GT Advisory Committee. DATE: December 20, 2023
Public Data
#34954 from Steve Davis · Not recommended · Minutes (2024-01 Fastrack)
Steve- The "data" that is compiled from the SOLO boxes is available only to the Data Team who prepare reports for review by the AC's and CRB. We do not believe that putting that information into the public domain would result in any appreciable improvement in the road racing program. Thank you for your interest in the program.
Follow-up on Letter 34453
#35170 from David Gomberg · Taken care of · Minutes (2023-12 Fastrack)
Thank you for your letter. Please see letter #34453 in current Fastrack.
Unibody Car Considerations in GT3, GTL
#35012 from Armen Megregian · Recommended to the Board · Minutes (2023-12 Fastrack)
In GCR, Section 9.1.2.F.5., change as follows: "Cars classified in GT2-Lite running front engine, rear wheel drive (RWD) may use independent rear suspension (IRS), by choice at a weight increase equal to 2.5 1.25% of the car’s specified weight."
Request to Withdraw Letter #34803
#34815 from Philip Di Pippo · No action required · Minutes (2023-11 Fastrack)
Thank you for your letter. Unfortunately, this is that time when a car just does not fit within the given rule sets of any GT class, and it would be unfair to the rest of the competitors to allow "one off" rules to make an accommodation. The CRB is very sorry that we were unable to classify your Ginetta GTA.
Ginetta GTA Alternate engine
#34803 from Philip Di Pippo · No action required · Minutes (2023-11 Fastrack)
Thank you for your letter. Please see letter #34815 in current Fastrack.
Makes no sense
#34713 from Philip Di Pippo · No action required · Minutes (2023-11 Fastrack)
Thank you for your letter. Please see letter #34815 in current Fastrack.
Request for reconsideration of prior classification
#34425 from Philip Di Pippo · Not recommended · Minutes (2023-08 Fastrack)
Thank you for your letter. The CRB would like to suggest that you request that this car be classified in GT2 rather than GT2- ST. The GT2 rules would allow modifications of the engine and chassis etc.
Audi TCR help GT3
#33913 from Tim Myers · Not recommended · Minutes (2023-04 Fastrack)
Thank you for your letter. The GT3 class Audi TCR will continue to be monitored in order to evaluate any spec changes.
Request to Classify 93 Eagle Talon TSI Turbo
#33655 from Sean Benson · Not recommended · Minutes (2023-02 Fastrack)
Thank you for your letter. AWD is not consistent with GT3 class philosophy.
GT3 Choke option
#33478 from Grand Touring Committee · Taken care of · Minutes (2023-02 Fastrack)
Thank you for your letter. Please see letter #33669 and 33670 in January 2023 Fastrack.
ABS Request
#33224 from Chris Edens · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. Your request is not recommended.
More data on Ginetta GTA G56
#33219 from Philip Di Pippo · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your letter. Your request is not recommended.
9.1.2.F.7.n.4.D
#33170 from Peter Zekert · Recommended to the Board · Minutes (2022-12 Fastrack)
In GT-2, 3, LITE CATEGORY SPECIFICATIONS, GCR section 9.1.2.F.7.n.4.D, add as follows: "Carburetors shall incorporate a butterfly-type throttle plate for engine speed control. For GTLite only: Carburetors shall incorporate a butterfly or slide-type throttle plate for engine speed control."
9.1.2.F.7.c.1
#33169 from Peter Zekert · Not recommended · Minutes (2022-11 Fastrack)
Thank you for your letter. The CRB feels that the current method of competitors requesting an alternate wheel base be added to their "spec line" is the best way to deal with this!
GT3 Steering Committee Document
#33144 from Joe Harlans · No action required · Minutes (2022-11 Fastrack)
Thank you for your letter. When the CRB and GTAC received the GT3 Steering Committee Document, the GTAC was advised by the CRB that any changes to SIR's and Chokes would not be effective until 1-01-2023! With that date in front of use, the GTAC has be watching, listening and waiting until after the 2022 Runoff's before acting on that phase of the Steering Document! We do continue to discuss the document during every monthly conference call!
Supplement and Correction to letter #32699 (Ginetta G56)
#32702 from Philip Di Pippo · No action required · Minutes (2022-11 Fastrack)
Thank you for your letter. Please see letter #33076 in September 2022 Fastrack.
Request allowance of proper race tires for Audi TCR car for GT3.
#33012 from Alex Mayer · Not recommended · Minutes (2022-10 Fastrack)
Thank you for your letter. Currently we have very little collected data on this car at this time. Going forward the CRB will make a point to do so to review and make adjustments as appropriate.
Response and Further Request Following Letter 32514 (Ginetta G56)
#32699 from Philip Di Pippo · No action required · Minutes (2022-10 Fastrack)
Thank you for your letter. Please see letter #33076 in September 2022 Fastrack.
12A Peripheral Port SIR Requirements
#32547 from Craig Bowers · Not recommended · Minutes (2022-10 Fastrack)
Thank you for your letter. The CRB will continue to monitor the class data.
Lack of Mirrors on GT cars
#32837 from Andrew Aquilante · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter. The wording as shown in 9. Cars and Equipment: 9.3.35 is satisfactory wording for all GT car mirror placement if used and enforced!
Carburetor weight break
#32548 from Craig Bowers · Not recommended · Minutes (2022-06 Fastrack)
Thank you for your letter. To date, SCCA collected data has not shown a distinct advantage when using fuel injection over carburation.
Request to Classify Ginetta G56 GTA in GT3 w/VTS
#32514 from Philip Di Pippo · Not recommended · Minutes (2022-06 Fastrack)
Thank you for your letter. GT3 is 4 cylinder class with a maximum displacement of 2992cc with inlet restrictors on the largest of the engines! The newest trend is to slowly blend Turbo's into the class! The foreseeable plan is to have GT3 remain within these perimeters! The recent group of TCR race car classifications into GT3 are all 4 cylinder with a turbo and restricted "Power Sticks" as well as a spec tire! Your request for classifying a 3.7L V6 far exceeds the established GT3 perimeters.
More feedback for TCR Cars From Fastrack posting
#32504 from Tim Myers · No action required · Minutes (2022-06 Fastrack)
Thank you for your letter. Thank you also for the data and related information that you have supplied us.
Allow Toyota 4AC - Unrestricted
#31953 from Scott Twomey · Not recommended · Minutes (2022-03 Fastrack)
Thank you for your letter. Engines under 2.0L are no longer being classified in GT3.
Fiat 124 Spider Engines
#31821 from Daniel Snow · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. Engines under 2.0L are no longer being classified into GT3.
Fiat X/19 1.5 Weight
#31820 from Daniel Snow · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. This weight request is not believed to be appropriate.
Fiat weight reduction
#31806 from Daniel Snow · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. This weight reduction is not felt to be justified.
Fiat Spider 2000 turbo engine
#31805 from Daniel Snow · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. This engine is not recommended at this time.
K24 Alternate Weight Allowance
#31707 from Greg Amy · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. This request is not within the GT3 philosophy.
Request to clarify IRS contradiction
#31372 from Michael Heintzman · Recommended to the Board · Minutes (2021-11 Fastrack)
In GCR, Section 9.1.2.F.7.e.12, change as shown below: "GT cars registered after January 1, 1990 or GT cars converted to Section F.2., specifications, using the front engine/rear drive configuration, shall use a "closed tube" rear axle housing. or may use independent rear suspension (IRS), by choice, at weight increase equal to 2.5% of the car's specified weight."
37mm SIR for 13B Peripheral Port
#31245 from Richard A Smith · Not recommended · Minutes (2021-11 Fastrack)
Thank you for your letter. Additional data is necessary to support a change such as this.
Weight Change Request for Disenfranchised GT2 RX7 in GT3
#31221 from Richard Smith · Not recommended · Minutes (2021-11 Fastrack)
Thank you for your letter. All disenfranchised GT2 cars running in GT3 share the same weight penalty. The CRB will begin installing SCCA data boxes in disenfranchised GT2 cars in order to see if there is a need to make any adjustment.
Black) Requesting Clarity of Turbo Rules
#30685 from Anthony (Coyote · No action required · Minutes (2021-07 Fastrack)
Thank you for your letter. In answer to your GT3 turbo clarification questions, it is permissible to run an intercooler, wastegate, and a blow-off valve.
Request aftermarket ECU allowance
#30593 from Nathan McBride · No action required · Minutes (2021-06 Fastrack)
Thank you for your letter. All GT2 and ST cars with the exception of various GT2 "spec" classifications can already have an ECU of their choice!
Request to Require OEM Sized Side Mirrors
#29840 from Andrew Aquilante · Not recommended · Minutes (2021-01 Fastrack)
Thank you for your letter. The rule is adequate as written "Mirrors shall provide driver visibility to the rear of both sides of the car."
Disenfranchised Weight Penalty and Porting Clarification
#26510 from Luis Rivera · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. Please refer to Technical Forms and Downloads on the SCCA website.
Request for Clarification on Bridge Porting for Rotary
#26004 from Luis Rivera · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. Please refer to Technical Forms and Downloads on the SCCA website.
Addendum to Letter #29560
#29667 from Michael Heintzman · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see response for Letter 29555 in current Fastrack.
GT3 4-valve SIR Size Increases Concern
#29560 from Michael Heintzman · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter.
Request Venting for Transmission Cooler
#29342 from Stephen Lamana · No action required · Minutes (2020-10 Fastrack)
Thank you for your letter. We would like to direct you to GTCS section 9.1.2.F.6.c.4 where your request has already been covered: 4. Ducts may be installed in the side windows or window openings for the purpose of supplying cooling air to the driver and/or differential/transmission coolers and/or the rear brakes. Air passing through the differential/transmission coolers may be exhausted through an opening identical in size and location to the rear license plate frame.
Request GT3 hood venting
#29211 from Rivera Luis · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter, we would advise you to read the GTCS and take advantage of the various ways that ventilation is already allowed particularly within the cockpit.
Restore original Mazda specs to GT3 Spec Line
#28376 from Grand Touring Committee · Taken care of · Minutes (2020-03 Fastrack)
Thank you for your letter. Please see letter 28119 that has corrected the error in the GT3 Mazda MZR spec line.
Request Nissan 200 SX Classification
#28183 from Mark Crellin · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. Car and engine are already classified in GT3.
Resume for GT
#28181 from Samuel Fouse · Member feedback requested · Minutes (2020-03 Fastrack)
Thank you for your resume. We will keep your resume on file for future needs on the GTAC AdCom. DATE: February 20, 2020
GT3 Nissan Inlet Restrictors
#28097 from Jim Froula · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The car is competitive as classed and the CRB will continue to monitor performance at the Super Tour and Runoffs for all drivers/car combinations in class.
Disenfranchised GT2 Mazda RX7 Restrictor Size
#27667 from Richard Smith · Not recommended · Minutes (2020-01 Fastrack)
Thank you for your letter. Disenfranchised GT2 running in GT3 penalties are appropriate as currently written.
Disenfranchised GT2 Mazda RX7 Weight Penalty
#27666 from Richard Smith · Not recommended · Minutes (2020-01 Fastrack)
Thank you for your letter. The disenfranchised GT2 cars running in GT3 penalties are appropriate as currently written.
Request BoP clarification
#27625 from Michael Lewis · No action required · Minutes (2020-01 Fastrack)
Thank you for your letter. Please see the response to letter #26958 in this Fastrack's Technical Bulletin.
Windshield Clips
#27323 from Todd Oppermann · Recommended to the Board · Minutes (2020-01 Fastrack)
In GCR section 9.1.2.F.6.c.1, add as follows: Alternatively, the bottom may be captured in a channel. "No clips or straps are required if bonded-glass factory windshields and/or rear windows are attached to chassis per original specifications (i.e., glass-bonding adhesive).”
Request to Allow E85 Race Fuel
#27058 from Joe Harlan · Not recommended · Minutes (2019-08 Fastrack)
Thank you for your letter. Allowing alternate fuel sources is beyond the GTAC's ability.
Request to approve turbos
#26987 from Chris Edens · Taken care of · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board has added a list of applicable Turbo rules in GT3.
Request weight change for Disenfranchised GT2
#26820 from Richard Smith · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. The Club Racing Board feels that the weight specs for disfranchised GT2 cars are correct as listed.
Request to change SIR for GT2 RX7
#26819 from Richard Smith · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. The Club Racing Board feels that induction specs for disfranchised GT2 cars is correct as listed.
Request Peripheral Port carb and choke change
#26818 from Richard Smith · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. The Club Racing Board feels that induction specs for disfranchised GT2 cars is correct as listed.
Request for list of turbo engine cars in GT3
#25695 from Armen Megregian · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. Specification has been given for full prep turbo motors and limited prep motors will be specified as manufacturers provide their information to the Club Racing Board.
Bridgeport 12a Adjustment
#28665 from Luis Rivera · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The GTAC feels there are adequate engine/SIR/choke and weight options for the 12A Mazda Rotary in the class.
Request to classify the 2014 WC Honda Accord
#26261 from Steve Kohli · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. This car is over the potential abilities for GT3. It is recommend that Touring Committee review to be placed in T1.
Request for RX7 Turbo/Follow up to letter #25695
#26028 from Armen Megregian · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your request. The 13B rotary has a displacement of 2.6l and is beyond the 2.0l limit for turbo consideration for a GT3 engine.
Request to Classify Mercedes Benz AMG in GT3
#25958 from Matt Jensen · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your letter. The CRB does not plan to classify this car in GT3. It is currently classified in GTX.
Request to Classify Ferrari 488 Challenge Car
#25957 from Matt Jensen · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your request. This car is being classified in GTX in letter #26034, Technical Bulletin.
Request to Classify 2016+ Shelby 5.2 350GTR
#23944 from Scotty B White · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your request. Please see the response to letter #21466, Technical Bulletin.