BoP Lab / Watkins Glen International

STU at Watkins Glen International

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	Lotus Exige	Richard Astacio	STU	80	1:54.135 A-P	1:54.135	2:02.958 A-Q2	2:05.262 B-R1	2:05.812 B-R2	+2.521 B-R2	139.3 A-Q2	33.209 A-Q2	42.158 A-Q2	47.591 A-Q2
2	Mazda Miata	Jorge Nazario	STU	165	1:54.541 A-P	1:54.541	2:03.947 A-Q2	2:06.460 A-R2			137.2 A-Q1, A-Q2	33.547 A-Q2	42.171 A-Q2	48.229 A-Q2
3	BMW 325	Darin Treakle	STU	70	2:03.591 A-Q2	2:03.448	2:03.591 A-Q2	2:04.491 A-R1	2:05.003 A-R2	+1.966 A-R2	142.4 A-R1	33.083 A-Q2	42.242 A-Q2	48.123 A-Q2
4	Lotus Exige	Anthony Geraci	STU	1, 31	2:04.050 A-Q1	2:03.520	2:04.050 A-Q1	2:04.574 A-R1	2:05.308 A-R1	+1.022 A-R1	142.7 A-Q2	32.874 A-Q1	42.440 A-R1	48.206 A-Q2
5	Lotus Exige	David Brand	STU	3	2:05.595 C-Q	2:04.995	2:05.595 C-Q	2:06.490 C-R1	2:07.233 C-R1	+1.018 C-R1	136.6 B-P	33.644 C-Q	42.629 A-Q2	48.722 C-R1
6	Honda Civic	Joe Kristensen	STU	144	2:05.890 A-R2	2:05.867	2:06.241 A-Q2	2:05.890 A-R2	2:06.287 A-R2	+1.436 A-R2	137.0 A-Q2	34.116 A-Q2	43.004 A-Q2	48.747 A-R2
7	Lotus Exige	David Nagler	STU	15, 51	2:06.006 A-R2	2:05.414	2:06.108 B-Q1	2:06.006 A-R2	2:06.448 A-R2	+1.239 A-R2	139.8 A-Q2, A-R1	33.977 A-Q2	43.104 A-R1	48.333 B-Q1
8	BMW M3	Hugh Stewart	STU	23	2:06.458 A-R1	2:06.066	2:06.830 A-Q2	2:06.458 A-R1	2:07.851 A-R1	+1.870 A-R1	142.7 A-R1	33.252 A-R1	43.790 A-R1	49.024 A-Q2
9	BMW Z4	John Weisberg	STU	40	2:07.058 A-R1	2:06.575	2:07.161 A-Q2	2:07.058 A-R1	2:07.849 A-R1	+1.657 A-R1	138.7 C-P	33.902 B-Q2	43.438 A-R1	49.235 A-R2
10	BMW 325	Matthew Rooke	STU	16	2:09.449 C-R1	2:09.138	2:09.878 C-Q	2:09.449 C-R1	2:10.513 C-R1	+1.984 C-R1	135.7 C-P, C-Q	34.979 C-Q	43.938 C-R1	50.221 C-R1
11	Nissan 300ZX	James Slechta	STU	75	2:09.468 A-P	2:09.158	2:10.153 B-Q1	2:09.943 C-R2	2:10.645 C-R2	+2.512 C-R2	132.0 B-R2	35.028 B-R2	44.089 B-R1	50.041 B-P
12	BMW M3	Michal Kuna	STU	74	2:09.488 B-R1	2:08.426	2:10.527 B-Q2	2:09.488 B-R1	2:09.972 B-R1	+1.205 B-R1	141.1 B-R1	33.699 B-R1	44.619 B-R1	50.108 B-R1
13	BMW 325	Matt Rooke	STU	16	2:10.587 A-R1	2:10.474	2:11.370 A-Q2	2:10.587 A-R1	2:11.229 A-R2	+1.583 A-R2	135.1 A-R1	35.276 A-Q2	44.366 A-R1	50.832 A-R2
14	Mazda Miata	Whitfield Gregg >115%	STU	17, 93	2:14.490 A-Q2	2:14.057	2:14.490 A-Q2	2:15.285 B-R1	2:16.438 B-R1	+2.226 B-R1	128.0 A-Q2	35.834 A-Q2	46.350 A-Q2	51.873 B-Q1
15	Honda S2000	Michael Reece >115%	STU	69	2:17.399 A-R1	2:16.498	2:18.228 A-Q1	2:17.399 A-R1	2:19.067 A-R1	+3.505 A-R1	124.8 A-Q1	36.903 A-R1	46.794 A-R1	52.801 A-Q1

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

S1 SF → In
S2 In → IM3
S3 IM3 → SF
Spd In → Out 0.02 mi

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3
Lotus Exige	STU	4	1:54.135Richard Astacio	2:02.958Richard Astacio	2:04.574Anthony Geraci	142.7Anthony Geraci	32.874Anthony Geraci	42.158Richard Astacio	47.591Richard Astacio
Mazda Miata	STU	2	1:54.541Jorge Nazario	2:03.947Jorge Nazario	2:06.460Jorge Nazario	137.2Jorge Nazario	33.547Jorge Nazario	42.171Jorge Nazario	48.229Jorge Nazario
BMW 325	STU	3	2:03.591Darin Treakle	2:03.591Darin Treakle	2:04.491Darin Treakle	142.4Darin Treakle	33.083Darin Treakle	42.242Darin Treakle	48.123Darin Treakle
Honda Civic	STU	1	2:05.890Joe Kristensen	2:06.241Joe Kristensen	2:05.890Joe Kristensen	137.0Joe Kristensen	34.116Joe Kristensen	43.004Joe Kristensen	48.747Joe Kristensen
BMW M3	STU	2	2:06.458Hugh Stewart	2:06.830Hugh Stewart	2:06.458Hugh Stewart	142.7Hugh Stewart	33.252Hugh Stewart	43.790Hugh Stewart	49.024Hugh Stewart
BMW Z4	STU	1	2:07.058John Weisberg	2:07.161John Weisberg	2:07.058John Weisberg	138.7John Weisberg	33.902John Weisberg	43.438John Weisberg	49.235John Weisberg
Nissan 300ZX	STU	1	2:09.468James Slechta	2:10.153James Slechta	2:09.943James Slechta	132.0James Slechta	35.028James Slechta	44.089James Slechta	50.041James Slechta
Honda S2000	STU	1	2:17.399Michael Reece	2:18.228Michael Reece	2:17.399Michael Reece	124.8Michael Reece	36.903Michael Reece	46.794Michael Reece	52.801Michael Reece

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Finger Lakes Region Hoosier SCCA Super Tour @ Watkins Glen International → Glen Region SCCA Hoosier Super Tour @ Watkins Glen International 2024-05-31 to 2025-06-27

2024-08-01 STU RWD Turbo Disadvantage

#36255 from David Fiorelli · Rule change · TB 24-08 (2024-08 Fastrack)

fasterSTU RWD turbo cars no longer required to reduce restrictor by 1 mm from table.

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~~"

2024-11-01 STU R53 15% Pulley Request

#36980 from Aaron Fitzsimmons · Rule change · TB 24-11 (2024-11 Fastrack)

slowerSTU Mini Cooper S SC 1900 restricts to 2.565 diameter pulley; 2100 allows 2.285 diameter pulley.

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."

2024-12-01 STU Request to Remove Miata Hubs from General category

#37138 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)

neutralSTL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval.

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~~."

2024-12-01 STU BMW N54/N55 Engine Allowance

#37146 from Martin Sarukhanyan · Rule change · TB 24-12 (2024-12 Fastrack)

slowerSTU BMW N54/N55 turbo inlet restrictors now required per GCR definition; turbo swapping prohibited.

"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.

2025-01-01 STU Audi 1.8t Wagon STU Table B

#36685 from Mike McLaughlin · Rule change · TB 25-01 (2025-01 Fastrack)

fasterSTU Audi 1.8T wagon deleted; Porsche 944 1800 weight to Chart, turbo inlet restrictor removed.

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 permitted~~inlet restrictor required~~."

2025-01-01 STU Merger GT3 to STU

#37486 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

neutralSTU-GT3 reclassified as STU-GT3U effective January 1, 2026.

In STU, Table C, change STU-GT3 charge as follows:
"(Effective January 1, 2026) TABLE C: STU-GT3U"

2025-01-01 STU GT3 TCR Tire allowance

#37494 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

slowerSTU GT3 TCR gains 275-width tire option with 100 lb weight penalty, but not in A compound.

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."

2025-03-01 STU BMW N54/N55 Engine Allowance Follow Up

#37447 from Martin Sarukhanyan · Rule change · TB 25-03 (2025-03 Fastrack)

neutralSTU BMW N54/N55 3.0L classified at Chart +3% minimum weight; N54 twin turbo not allowed.

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

2025-03-01 STU STU Mini Cooper pulley size clarification re: letter #36980

#37717 from Aaron Fitzsimmons · Rule change · TB 25-03 (2025-03 Fastrack)

fasterSTU Mini Cooper S SC supercharger pulley diameter reduced from 2.285 to 2.185.

In STU Spec Lines, Mini Cooper S SC, add to notes:
2100: "May run a ~~2.285~~ 2.185 diameter pulley."

2025-03-01 STU Question About a Weight Modifier

#37782 from Peter St Pierre · Rule change · TB 25-03 (2025-03 Fastrack)

fasterSTU Honda K20C1 Turbo I4 exempted from 3% DI weight adder in Spec Lines Table A.

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."

2025-03-01 STU Increase Minimum Weight

#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)

slowerSTU GT3U minimum weight increases 150 to 250 pounds.

In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows:
"~~150~~ 250 pounds"

2025-05-01 STU Wheel Size Inconsistency

#38018 from David Fiorelli · Rule change · TB 25-05 (2025-05 Fastrack)

neutralSTU wheel width rules clarified: cars ≤2,850 lbs max 8 inches, cars >2,850 lbs max 9 inches.

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."

2025-05-01 STU Table C: STU-GT3U Clarification

#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

fasterSTU Spec Line GT3U minimum weight reduced from plus 250 to plus 225 pounds; wheel and tire options clarified with weight adjustments.

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."

Glen Region SCCA Hoosier Super Tour @ Watkins Glen International → Finger Lakes Region SCCA Hoosier Super Tour @ Watkins Glen International 2025-06-27 to 2026-06-19

2025-07-01 STU 2.8-3.2L N/A Engine Allowances

#38007 from Ben Slechta · Rule change · TB 25-07 (2025-07 Fastrack)

unclearSTU 2.8-3.2L N/A engines now allow 245 max tire width; over 3150 lbs may run 275 with 2% weight penalty.

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."

2025-07-01 STU 2006-2015 Mazda Miata Intake Manifold

#38422 from German Candelario Candelario · Rule change · TB 25-07 (2025-07 Fastrack)

neutralSTU Mazda MZR may use Goodwin 61-2510 or Gato Performance 31972 intake manifold.

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 . "

2025-07-01 STU Requesting Approval of the JDM Honda h23a

#38489 from Eric Fiest · Rule change · TB 25-07 (2025-07 Fastrack)

neutralSTU Honda JDM H23a added, 2259cc displacement, minimum weight per Chart, must meet ST engine regulations.

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.

2025-08-01 STU STU-TCR Adjustments

#38723 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

slowerSTU-TCR tire width increases to 275 with weight adder raised from 100 to 150 pounds.

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."

2025-08-01 STU Lotus Weight Reduction

#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

fasterSTL/STU Lotus weight reduced: Evora GT4 to 2700 lbs, Elise Cup R to 2250 lbs, Elise/Exige SC to 2450-2550 lbs.

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"

2025-09-01 STU Lotus Weight Reduction E&O

#38919 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

fasterSTU Lotus Elise SC and Exige SC weight reduced from 2450 to 2250 lbs.

In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise SC/ Lotus Exige SC: ~~"2450~~ 2250"

2025-11-01 STU Non-Homologated Engine Swaps - Specifically K24A2 w/ Honda CRZ

#38746 from William Rori · Rule change · TB 25-09 (2025-09 Fastrack)

slowerSTU Honda K24 engine swap weight increases by 2% effective November 1, 2025.

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, Honda K24, change Weight as follows:
"(Effective 11/1/2025) Chart ~~+ 2%~~"

2025-12-01 STU Turbo Inlet Restrictor Table

#38961 from John Weisberg · Rule change · TB 25-12 (2025-12 Fastrack)

slowerSTU 36mm restrictor allows 2830 lbs (up 10 lbs from 2820); 37mm allows 2980 lbs (down 5 lbs from 2985).

In GCR, Section 9.1.4.H.3, change chart as follows:

A specification table follows in the original; it is not shown here.

2025-12-01 STU 275 Tire Rule

#38983 from Peter Federlin · Rule change · TB 25-12 (2025-12 Fastrack)

slowerSTU cars over 3150 lbs lose 275-tire option with 2% weight adder.

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.~~"

2025-12-01 STU STU Honda Engine weight penalty

#39375 from Super Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

fasterSTU Honda K20 and K24 engines lose 2% minimum weight penalty.

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Minimum Weight as follows:
Honda K20: "Chart ~~+ 2%~~"
Honda K24: "Chart ~~+ 2%~~"

2026-01-01 STU Request for Permission on Aftermarket Turbo Kit and Intake

#39529 from John Grim · Rule change · TB 26-01 (2026-01 Fastrack)

fasterSTU Mazda MZR (LF, L3, L5) Turbo classified; Jack Spania Racing 70 mm intake manifold and Fab9 Tuning bottom-mount turbo kit approved.

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.

2026-03-01 STU Fab 9 Racing Intake Manifold in STU

#39767 from Marc Hoover · Rule change · TB 26-03 (2026-03 Fastrack)

neutralSTU Mazda MZR (LF, L3, L5) adds Fab 9 Elite NC MX5 Performance Intake manifold as approved option.

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."

2026-04-01 STU Mazda Rx-8 Renesis - Streetported Variant & Added Weight

#39785 from Kyle Bolden · Rule change · TB 26-04 (2026-04 Fastrack)

neutralSTU Mazda Renesis Street Port added to Table B with 2450 lbs minimum weight, street porting allowed.

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."

2026-04-01 STU Eliminate 33 and 34 mm TIRs

#39872 from Super Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)

unclearSTU eliminates 33 and 34 mm restrictor options, removing 2380 and 2525 lb minimum weight entries.

In STU, GCR Section 9.1.4.H.3., change chart as follows:
Inlet Restrictor (mm): "33"
Minimum Weight (lbs): "~~2380~~"
Inlet Restrictor (mm): "34"
Minimum Weight (lbs): "~~2525~~"

2026-05-01 STU Turbo Restrictor Size Increase Request

#40008 from Peter St Pierre · Rule change · TB 26-05 (2026-05 Fastrack)

fasterSTU Honda K20C1 turbo restrictor increases from 35mm to 36mm TIR.

In STU Spec Lines, Table A: Alternate Vehicle and Engine Requirements, Honda K20C1 Turbo I4, change Notes as follows:
"35 36mm TIR required."

2026-05-01 STU GT86 Cups Car in STU

#40028 from Peter Federlin · Rule change · TB 26-05 (2026-05 Fastrack)

neutralSTU GT86 Cups Car must meet 2022 Toyota GR Cup rules, including DOT tires with maximum section width of 245.

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.

2026-06-01 STU Request to allow BMW M50B20TU engine in STU

#40202 from Bjorn Stange · Rule change · TB 26-06 (2026-06 Fastrack)

neutralSTU BMW M50B20TU engine 1991cc added, minimum weight per chart, must meet all STU engine regulations.

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."

2026-06-01 STU Calculating Weight

#40224 from David Wessel · Rule change · TB 26-06 (2026-06 Fastrack)

neutralSTL and STU weight calculation wording clarified; percentage adjustments combined before applying fixed weight adjustments.

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 c~~hassis~~ 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."

What the rules allowed changed as listed; this does not say what any particular car ran.