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BoP Lab / Buttonwillow Raceway Park

GT3 + FC at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2026 (practice, qualifying, race) · Cal Club 2025 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
Track configuration
Events

This track has been raced on 4 configurations (The Circuit, 2.57 mi; 2.92 mi; 1.83 mi; 3.02 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.

GT3 has no laps in the events chosen. It ran at Cal Club 2024, Cal Club 2023: add those events.

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1Van Diemen RF05 (2005)Peter WestFC211:11.935 D-Q21:11.935 D-Q2
2Van Diemen RF99Troy ShooterFC871:12.478 D-Q21:12.478 D-Q2
3Van Diemen DP08 (2008)Gary PetersonFC91:14.576 D-Q21:14.576 D-Q2
4Van Diemen DP-08Robert Armington >115%FC111:45.137 A-Q21:44.9431:45.137 A-Q21:45.314 A-R21:46.641 A-R2+1.552 A-R2143.5 A-Q229.106 A-Q230.109 A-R145.728 A-Q2
5Van Diemen RF96Shawn Sarbacker >115%FC31:47.570 A-R21:47.2051:47.741 A-Q21:47.570 A-R21:48.139 A-R2+2.423 A-R2146.2 A-Q229.351 A-Q230.778 A-R247.076 A-R2
6Van Diemen RF97Bill Wallschlaeger >115%FC01:47.993 A-R21:47.7661:51.040 A-Q11:47.993 A-R21:48.553 A-R2+1.107 A-R2147.5 A-R229.638 A-R230.895 A-R247.233 A-R2
7Van Diemen RF01Paul MacFarlane >115%FC531:48.522 B-R11:48.4811:50.067 B-Q11:48.522 B-R11:49.143 B-R1+2.405 B-R1114.4 B-R229.050 B-R131.137 B-R148.294 B-R1
8Van Diemen RF (2000)Greg Pizzo >115%FC141:58.213 A-R21:57.3332:10.106 A-Q21:58.213 A-R22:01.052 A-R2+4.196 A-R2127.3 A-R232.045 A-R234.162 A-R251.126 A-R2

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

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

CarClassDriversLapQualRaceTrapS1S2S3
Van Diemen RF05FC11:11.935Peter West1:11.935Peter West
Van Diemen RF99FC11:12.478Troy Shooter1:12.478Troy Shooter
Van Diemen DP08FC11:14.576Gary Peterson1:14.576Gary Peterson
Van Diemen RF01FC21:45.137Robert Armington1:45.137Robert Armington1:45.314Robert Armington143.5Robert Armington29.050Paul MacFarlane30.109Robert Armington45.728Robert Armington
Van Diemen RF96FC11:47.570Shawn Sarbacker1:47.741Shawn Sarbacker1:47.570Shawn Sarbacker146.2Shawn Sarbacker29.351Shawn Sarbacker30.778Shawn Sarbacker47.076Shawn Sarbacker
Van Diemen RF97FC11:47.993Bill Wallschlaeger1:51.040Bill Wallschlaeger1:47.993Bill Wallschlaeger147.5Bill Wallschlaeger29.638Bill Wallschlaeger30.895Bill Wallschlaeger47.233Bill Wallschlaeger
Van Diemen RFFC11:58.213Greg Pizzo2:10.106Greg Pizzo1:58.213Greg Pizzo127.3Greg Pizzo32.045Greg Pizzo34.162Greg Pizzo51.126Greg Pizzo

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

Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23

GT3 Please classify Fields Cardinal V8

#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

cars addedFields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight.

As printed in 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.

FC USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC

#34329 from Formula/Sports Racing Committee · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

cars addedUSF2000 Van Diemen with Mazda MZR LF-DE 2.0L added as spec line car in FC; removed from FX.

As printed in Fastrack

RM 23-07, USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC, GCR section 9.1.1.B.1, add a new section and re-letter the
following sections accordingly:
"c. The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine is added as a "spec line" car in
Formula Continental. Additional "spec line" cars are disfavored, and Balance of Performance (BoP) adjustments to keep "spec
line" cars competitive with cars that meet the class formula are likewise disfavored."
In FC, GCR section 9.1.1.B.11, add the following:
"The only permitted engines are:
a. The Ford 2 liter single overhead camshaft "NE" series engine or the 1971-74 Pinto/Capri 2 liter single overhead camshaft

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engine. The specifications are contained in B.15.
b. The Ford Zetec ZX3 2 liter dual overhead camshaft engine. The specifications are contained in B.16.
c. The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."
In FC, GCR section 9.1.1.B, add the following:
In FX, GCR section 9.1.1.J.B, change as follows and renumber the remaining lines accordingly:
"3. USF2000 (tube frame) – Shall comply with FRP F2000 Technical Specifications (2018)
4. Pro Formula F2000 (tube frame) – Engine must be prepared to current FC rules."
In FX Table 1, remove the USF2000 Tube Frame and Pro Formula F2000 Tube Frame spec lines in their entirety.
Spec Line Cars Table

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

FC Review FC Runoffs Tire Marking Rule

#34274 from SCCA Staff · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingFC tire marking rule clarified: four dry and wet tires for Regionals, eight each for Runoffs; damaged tire replacement procedures revised.

As printed in Fastrack

In FC, GCR section 9.1.1.B.10.h, change as follows:
"FC shall be is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super Tour events;
eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This rule shall be is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for testing or practice. It is the competitor's responsibility to
ensure that the tires are declared, marked, and logged by Tech in advance of the tire(s) being used in a qualifying session or
race. Failure to participate on marked tires will result in a penalty.
1. Use of an undeclared tire shall automatically result in all times being disallowed in that session or finishing position in that
race.

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2. If a tire is damaged during a qualifying session or a race, the competitor may replace the damaged tire with a used tire upon
approval by the Chief Steward without loss of time or finishing position. Second or subsequent damaged tires may similarly be
replaced upon approval by the Chief Steward, however but such shall will result in the loss of grid position in the subsequent race
or session; the competitor shall will start at the back of the grid. Replacement of a damaged tire with a new tire upon approval by
the Chief Steward will result in loss of grid position in the subsequent race or session."

GT3 Addendum to letter 33913, GT3 DOT tires.

#34627 from Grand Touring Committee · Rule change · TB 23-08 (2023-05 Fastrack)

Summary

fasterGT3 cars using 15" American Racer 23.5-10.0-15 bias ply tires avoid weight penalty.

As printed in 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."

GT3 Classify Honda B20 engine in GT3 CRX

#34781 from Taz Harvey · Rule change · TB 23-10 (2023-10 Fastrack)

Summary

cars addedGT3 Honda B20 engine newly classified for use in CRX, 1973cc displacement, aluminum head, DOHC.

As printed in Fastrack

In GT3 Engines - HONDA, classify B20 as follows:
GT3 Engines - HONDA

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

GT3 GT3 TCR 200 TW tires

#34993 from Grand Touring Committee · Rule change · TB 23-11 (2023-11 Fastrack)

Summary

slowerGT3-TCR Audi RS3 LMS, Honda Civic Type R, Hyundai i30 N, VW Golf GTi must use 200 tread wear tires only.

As printed in Fastrack

In GT3 Spec Lines, GT3-TCR, change Notes as follows:
Audi RS3 LMS (16-20) @ 3170 lbs: "Must use 200 tread wear any DOT tires. No tire shaving permitted. Stock TCR wheels only."
Audi RS3 LMS (16-20) @ 3100 lbs: "Must use 200 tread wear any DOT tires."
Honda Civic Type R (16-20): "Must use 200 tread wear any DOT tires."
Hyundai 130 N (16-20): "Must use 200 tread wear any DOT tires."
Volkswagen Golf GTi (16-20) @ 3177 lbs: "Must use 200 tread wear any DOT tires."
Volkswagen Golf GTi (16-20) @ 3100 lbs: "Must use 200 tread wear any DOT tires."

GT3 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)

Summary

wordingGTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL.

As printed in 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

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GTL Cars 364
GTA Cars 377
P2 Engine Table B.1
2010 and older
Stock Kawasaki
38.5mm
minimum width 52 inches. AMAC-AM5:
minimum width 54 inches.
P2 Engine Table B.1
2008 and older
Stock Engine Suzuki,
Yamaha,
Honda, BMW
38.5mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 38.5mm
Modified Engine
950 lbs.
1005cc max
P2 Engine Table B.1 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.

GT3 Toyota Engine Classification Request

#35019 from warren Montague · Rule change · TB 23-12 (2023-09 Fastrack)

Summary

engineGT3 Toyota 3S DOHC engine classified at 1998 cc, 1960 lbs minimum weight, unrestricted fuel induction.

As printed in Fastrack

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 GT3 2.0L SIR & weight

#35171 from Grand Touring Committee · Rule change · TB 23-12 (2023-09 Fastrack)

Summary

slowerGT3 2.0L SIR cars lose 32mm unrestricted option, now require restrictor at 2195lbs minimum.

As printed in 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.

FC Please correct omitted punctuation

#34890 from Club Racing Board · Rule change · TB 23-10 (2023-09 Fastrack)

Summary

engineF600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional.

As printed in Fastrack

In Cars and Equipment, GCR section 9.3.33.B.2, add the following:
"(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open
wheel) and Sports Racing cars."
In Appendix F. Technical Glossary, Minimum Weight, change as follows:
"Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or
qualifying session."
In FA Table 1, Spec Line E notes, add the following:
"Any BD series iron or alloy cylinder block and alternate crankshaft permitted."

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In FC, GCR section 9.1.1.B.11.c, change as follows:
"The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below.""
In F600, GCR section 9.1.1.D.14, add the following:
"Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter;
an electric starter may be added."
In P1, GCR section 9.1.8.B.J.2, add the following:
"Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder
or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."

GT3 Disenfranchised GT2 RX7.

#35028 from Richard Smith · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

slowerGT3 Mazda RX7 12A, 13B Bridgeport, 13B Peripheral Port: disenfranchised GT2 adds 75 lbs.

As printed in 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."

GT3 Turbo Help

#35042 from Chris Edens · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterGT3 Mazda BP4W turbocharged OEM engine weight reduced from 2060 to 1960 lbs.

As printed in Fastrack

In GT3 Engines - Mazda Spec Lines, Mazda BP4W Turbocharged OEM engine, change Weight as follows:
"2060 1960"

GT3 Competition Adjustment Request for 13B Peripheral Port

#35100 from Richardo Hollingshead · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterGT3 Mazda 13B peripheral port weight reduced to 2100 lbs.

As printed in Fastrack

In GT3 Engines - MAZDA Spec Lines, 13B Peripheral Port, change Weight as follows:
"2200 2100"

GT3 Request to Include Toyota GR 86 in GT3

#35197 from Erik Madsen Madsen · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

cars addedGT3 adds Toyota GR 86 (DR86) 2021–2024, 2-door RWD, 101.3 in wheelbase.

As printed in 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

GT3 Fastrack Toyota 3S Correction

#35258 from warren Montague · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

unclearGT3 Toyota 3S bore increases to 86.0mm, stroke decreases to 86.0mm.

As printed in Fastrack

In GT3 Engines - Toyota, 3S, change as follows:
Bore: "84.2 86.0"
Stroke: "90.1 86.0"

GT3 Request to Include Toyota FA24D Engine for use in GT3

#35199 from Erik Madsen Madsen · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

cars addedGT3 Toyota FA24D engine classified: 2387cc DOHC, 2195 lbs, 32mm SIR, direct injection permitted.

As printed in 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.

GT3 Rear Blade Spoiler Clarification

#35261 from Butch Kummer · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

fasterGT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed.

As printed in Fastrack

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.”

GT3 GT Direct Injection allowance and rules

#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

fasterGT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors.

As printed in 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.”

GT3 GT2/3 remove Direction Injection not allowed in Spec line notes

#35439 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

fasterGT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E.

As printed in 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.”

GT3 Edit GT3 Nissan QR25DE/DD spec line

#35442 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

unclearGT3 Nissan QR25DE/DD spec line edit; text unreadable due to formatting corruption.

As printed in Fastrack

In GT3 Engines - Nissan QR25DE/DD, change as follows:
11111’QR25 0DE/DD”

Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22

GT3 Miata Turbo Clarification

#35386 from Chris Edens · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

slowerGT3 Miata Turbo restrictor increases to 35 mm, minimum weight rises to 2350 lbs.

As printed in Fastrack

In GCR, Section 9.1.2.F.7.i.3. GT3 Turbocharged Built Engines:, 1401-1850, change as follows:
Restrictor: "34 35 mm"
Weight (lbs): "2250 2350"
In GCR, Section 9.1.2.F.7.i.3. GT3 Turbocharged Built Engines:, relocate chart to 9.1.2.F.7.h.6.d., as follows:
"d. Borg-Warner EFR6258

FC Four Pot Calipers

#35481 from Steve Jenks · Rule change · TB 24-04 (2024-04 Fastrack)

Summary

cars addedFC adds F2000 Metrik ZF2 with Ford Zetec engine and four-piston Brembo calipers as spec-line car.

As printed in Fastrack

In FC Table FC Charts, add the following:
In FC, GCR section 9.1.1.B.1.c, change as follows:
"The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine and the F2000 Metrik ZF2 car
equipped with 4-piston calipers is are added as a "spec line" cars in Formula Continental. Additional "spec line" cars are
disfavored, and Balance of Performance (BoP) adjustments to keep "spec line" cars competitive with cars that meet the class
formula are likewise disfavored."
FC Charts
Car Engine Wheel Width

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(in) ± .060 Aero Transmission Weight Notes

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

GT3 Request for Spec Line 1010 Reconsideration

#35009 from Kristofer Olson · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

slowerGT2-ST Acura NSX minimum weight raised to 3000 lbs, restrictor increased to 45mm TIR.

As printed in Fastrack

In GT2-ST Spec Lines, Acura NSX, change as follows:
Minimum Weight: "2700 3000"
Restrictor: "43 45mm TIR"

GT3 Mazda MZR Engines

#35753 from Sam Fouse · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

aeroGT3 Ford Duratech now allows hood bulge with no openings.

As printed in Fastrack

In GT3 Engines-FORD, Duratech, add to Notes as follows:
"Hood bulge allowed w/ no openings."

GT3 Disenfranchised GT2 Acura RSX to Run GT3

#35773 from Robert Stratos · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

slowerGT3 Acura K20A RSX body disenfranchised from GT2 adds 75 lbs weight penalty.

As printed in Fastrack

In GT3 Engines -ACURA Spec Lines, K20A, add to Notes as follows:
"RSX body only. Disenfranchised GT2* add 75 lbs."

GT3 Toyota 4Y Engine Request

#35885 from Scott Schick · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

cars addedGT3 Toyota 4Y engine classified at 2030 lbs with unrestricted fuel induction.

As printed in Fastrack

In GT3 Engines - TOYOTA, classify 4Y as follows:
GT3 Engines - TOYOTA
Engine
Family
Engine Type Bore x Stroke

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

GT3 GT3 spec lines clean-up

#36008 from Grand Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingGT3 Toyota model designation changes from DR86 to GR86.

As printed in Fastrack

In GT3 Cars - TOYOTA, change Model as follows:
"DR86 GR86"

GT3 GT3 Honda spec line clean-up x 2

#36009 from Grand Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingGT3 Honda spec lines change engine family designation from bore/displacement to K20C1 and K24 model numbers.

As printed in Fastrack

In GT3 Engines - HONDA Spec Lines, change Engine Family as follows:
"89mm K20C1"
"1973cc K24"

GT3 GT3 Mazda spec line clean-up x2

#36010 from Grand Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingGT3 Mazda spec line numbering changed from 4 to Model, unrestricted to 323, and 2195 to 626.

As printed in Fastrack

In GT3 Cars - MAZDA Spec Lines, change as follows:
Heading: "4 Model"
"Unrestricted 323"
"2195 626"

GT3 GT3 +1mm SIR add 175lbs. In

#36098 from Grand Touring Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

slowerGT3 cars may run +1mm SIR above spec with 175 lb weight penalty added.

As printed in 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."

GT3 Revised GT3 Built Turbocharged chart

#36100 from Grand Touring Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

slowerGT3 turbocharged 1401-1850cc four-valve engine with 35mm restrictor reduced to 34mm, weight to 2250 lbs.

As printed in 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"

GT3 Correct missed Disenfranchised weight reduction

#36237 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

fasterGT3 Pontiac Sunfire GT weight reduction corrected from 150 lbs to 75 lbs.

As printed in Fastrack

In GT3 Cars - PONTIAC, Sunfire GT, change Notes as follows:
"150 75"

GT3 errors & omissions on GT3 Mazda MZR spec lines

#36241 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

fasterGT3 Mazda MZR removes second DOHC option, fuel induction now unrestricted.

As printed in Fastrack

In GT3 Spec Lines, GT3 Engines - MAZDA, MZR, eliminate 2nd DOHC in its entirety and change Fuel Induction as
follows:
"Unrestricted"

GT3 Adding Datsun B110 to List of Approved Cars

#36198 from Vaughn Cooper · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

cars addedGT3 adds Datsun 1200 B110 (70–73), 90.6 in wheelbase, engine per GT3 spec or alternate Nissan request.

As printed in 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)

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engine for consideration.

GT3 Honda Civic Type R TCR Weight Reduction Request

#36550 from Nathan Bonneau · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

fasterGT3-TCR Honda Civic Type R, Audi RS3 LMS, Hyundai I30N, Volkswagen GTI weights adjusted; Hyundai down 100 lbs to 3154, VW down 100 lbs to 3077.

As printed in Fastrack

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"

GT3 2024 Mazda 3 TC request for GT3

#36517 from Derrick Ambrose · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

cars addedGT3 Mazda 3TC classified in TCR with 2950 lbs minimum weight, effective 11/1/2024.

As printed in Fastrack

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.

GT3 GCR GT3 Disfranchised GT2

#36291 from Richard Smith · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

fasterGT3 Mazda 13B Bridgeport and Peripheral Port both drop to 2275 lbs minimum weight.

As printed in 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."

FC 9.1.1.10.h. FC Tire Rule

#36533 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

slowerFC tire limit reduced to four dry and four wet for Regional/Major/Super Tour, eight for Runoffs.

As printed in Fastrack

In FC, GCR section 9.1.1.B.10.h, change as follows:
"(Effective 11/1/2024) FC is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super
Tour events; eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for The tire limit does not apply to testing or practice. It is the
competitor's responsibility to ensure that the tires are declared, marked, and logged by Tech immediately upon conclusion of the
first qualifying session, as provided in the event supplemental regulations, or per the instructions of the Race Director or Chief
Steward. in advance of the tire(s) being used in a qualifying session or race. Failure to participate on marked Use of tires in
excess of the number allowed will result in a penalty. Failure to participate on declared/marked/logged tires after the time

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prescribed for the same may result in a penalty. If a tire is damaged during a qualifying session or a race, the competitor may
replace the damaged tire with a used tire upon approval by the Race Director or Chief Steward without loss of time or finishing
position. Second or subsequent damaged tires may similarly be replaced upon approval by the Race Director or Chief Steward,
but such will result in the loss of grid position in the subsequent race or session; the competitor will start at the back of the grid.
Replacement of a damaged tire with a new tire upon approval by the Race Director or Chief Steward will result in loss of grid
position in the subsequent race or session; the competitor will start at the back of the grid."

FC Change FF/FC Weight with Sequential Gearbox

#36651 from Robert Wright · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.

As printed in Fastrack

In FF, GCR section 9.1.1.B.20.A.3, change as follows:
"Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
In FC, GCR section 9.1.1.B.20.B.4, change as follows:
"Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."

GT3 Nissan MR20DE Engine Classification Request for GT3

#36791 from Jerold Larson · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

cars addedGT3 Nissan MR20DE DOHC engine classified with 1997cc displacement, 32mm restrictor, 2060 lbs minimum weight.

As printed in Fastrack

In GT3 Engines - NISSAN Spec Lines, classify Engine Family MR20DE as follows:
GT3 Engines - NISSAN

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

GT3 GT3 Mazda 13B PP correction

#37057 from Grand Touring Committee · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

fasterGT3 Mazda 13B minimum weight drops 175 lbs to 2175 lbs.

As printed in Fastrack

In GT3 Engines - MAZDA Spec Lines, Engine Family 13B Disp. 2616, change as follows:
Weight (lbs): "2350 2175"
Notes: "Disfranchised GT2* add 75 lbs. Effective 11/1/2024 Disfranchised GT2* weight 2275 2175)"

GT3 GT3 Mazda12A PP Correction

#37058 from Grand Touring Committee · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

fasterGT3 Mazda 12A peripheral port minimum weight reduced to 2100 lbs.

As printed in Fastrack

In GT3 Engines - MAZDA Spec Lines, Engine Family 12A Peripheral Port Disp 2292, change Weight as follows:
"2300 2100"

GT3 Pontiac Weight and Chassis Adjustment Request

#36938 from Andrew Lott · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

fasterGT3 Pontiac LE5 Ecotech minimum weight drops 150 lbs to 2195.

As printed in Fastrack

In GT3 Engines - PONTIAC Spec Lines, LE5 Ecotech, change Weight as follows:
"2345 lbs. 2195 lbs."

GT3 Correct language regarding OEM Areo Devices

#37137 from Christopher Childs · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

wordingTA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof requirement.

As printed in 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.

GT3 VW Funcap weight

#37217 from John Mills · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

fasterGT3 VW Fun Cup Beetle Sealed exempt from 150 lbs consolidation add-on weight.

As printed in 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."

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

GT3 Clarification of GT3U

#38266 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

slowerGT3U with 15x7 wheels and 225 tires gains 75 lbs to 225 lbs over GT3 weight; wheel weight penalties clarified.

As printed in 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."

GT3 Declassify TCR Cars from GT3/GT3U

#38569 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

slowerGT3U cars with 15×7" wheels add 225 lbs to GT3 weight; wider wheels allowed with weight penalties up to 3.0%.

As printed in 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."

FC F2000 MZR Spec Line Clarity/Revision Requested

#38927 from Rock Beauchamp · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

wordingFC USF2000 Tube Frame may use Hewland LD200 4-speed H-pattern as alternative to Hewland JL-200 5-speed sequential.

As printed in Fastrack

In FC Charts table, USF2000 Tube Frame spec line, add the following to the Notes:
"Cars originally built with the Hewland LD200 4-speed H-pattern may use that transmission as an alternative to the Hewland JL-
200 5-speed sequential transmission."

FC Adjust F2000 Metrik ZF2 weight

#39612 from Club Racing Board · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

fasterFC F2000 Metrik ZF2 minimum weight reduced to 1220 lbs.

As printed in Fastrack

In FC Charts table, F2000 Metrik ZF2 spec line, change the Weight as follows:
"1240 1220"

GT3 GT3U Ride Height

#39637 from Grand Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

suspension & brakesGT3U cars must maintain 3.0" minimum ride height on frame rails and 2" minimum on front spoiler and splitter.

As printed in 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."

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