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.
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 → IM1 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 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
Elan DP02/Mazda
P
1
1:32.576Jim Devenport
1:32.872Jim Devenport
1:33.972Jim Devenport
171.9Jim Devenport
25.461Jim Devenport
26.606Jim Devenport
40.217Jim Devenport
Dauntless Stohr
P
2
1:36.516Johnnie Crean
1:36.516Johnnie Crean
1:37.287John Manfroy
160.4John Manfroy
25.956Johnnie Crean
27.257John Manfroy
42.386John Manfroy
Dauntless Stohr
P
1
1:36.516Johnnie Crean
1:36.516Johnnie Crean
1:39.209Johnnie Crean
157.4Johnnie Crean
25.956Johnnie Crean
28.143Johnnie Crean
42.417Johnnie Crean
Dauntless-Stohr P07d
P
1
1:37.287John Manfroy
1:41.818John Manfroy
1:37.287John Manfroy
160.4John Manfroy
26.696John Manfroy
27.257John Manfroy
42.386John Manfroy
Stohr WF1
P
1
1:38.716Kevin Mitz
1:38.716Kevin Mitz
1:39.638Kevin Mitz
155.4Kevin Mitz
26.934Kevin Mitz
28.397Kevin Mitz
43.336Kevin Mitz
Penton Norma M20FC
P
1
1:39.296Joseph Moran
1:39.296Joseph Moran
1:40.832Joseph Moran
149.0Joseph Moran
27.106Joseph Moran
28.111Joseph Moran
43.651Joseph Moran
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
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.
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."
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
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.
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
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.”
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
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.”
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."
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
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.
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."
wordingPrototype Staudacher and unrestricted engine notes corrected for minimum weight wording.
As printed in Fastrack
In Prototype Engine Table, Spec Line B, change the notes as follows: "Staudacher cars may run 950 lb min. wt. minimum weight with 38.5mm flat plate intake restrictor." In Prototype Engine Table, Spec Line D, change the notes as follows: "No restrictor required at 1150 lb min. wt. minimum weight."
wordingPrototype class renamed from P1 to P, affecting designation throughout rules with no performance changes.
As printed in Fastrack
In Categories and Classes, GCR section 9.1, change as follows: "9.1.8. SPORTS RACING CATEGORY CLASSES A Sports Racing (ASR) Regional Class Prototype 1 (P1)" In Homologation Requirements, GCR section 9.2.2, change as follows: "All Formula, Sports Racing, and P1, and P2 cars must be constructed in strict accordance with the rules and regulations contained in the current GCR unless specifically excepted." In Non-Metallic Wheel/Chassis Construction, GCR section 9.3.37, change as follows:
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"Non-metallic wheel construction is prohibited. Non-metallic chassis construction is prohibited, except in ASR, P1, FS and FA." In Appendix B, GCR section 1.4.2.G, change as follows: "It is preferable not to combine GT1, AS, T1, T2, T3, and STU with P1, P2, SRF, FP, HP, or GTL." In Appendix C, GCR section 2.6.G, change as follows: "A 14 or 15 year-old must complete his first SCCA driver school in a car not classed in GT1, GT2, FA, FB, F S, ITR, ASR, P1, P2, or T1." In Appendix E, section 1, change as follows: "Depending on the length and banking of the oval course being used, it is recommended that Regions consider restricting the faster classes (GT1, FA, and P 1) from competition at oval track events." In Sports Racing Category, GCR section 9.1.8.1, change as follows: "The SCCA Sports Racing Category shall be for automobiles which are designed and constructed for road racing competition, offering provisions for a driver and passenger, or a driver alone (single-seater). They shall conform to the following requirements. Sports Racers Cars except SRF & SRF3 homologated prior to 1-1-2014 are eligible to compete as P1 or P2 as long as they meet applicable class rules,; no re-homologation is required." "Single seat Formula car chassis (Ex.: FA, FC, FF, FV) fitted with enclosed bodies (as specified in these rules) may run in a Sports Racing/Prototype Class (ASR, P 1, P2) provided they comply with the requirements of the Classification Specification and GCR Section 9." In Sports Racing Category, GCR section 9.1.8.2, change as follows: "In an effort to control shock/damper technology and cost to a level reasonable for Road Racing, in ASR, P1, and P2, any fluid dampers are allowed with the following restrictions:"
Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21
wordingClass P adds clarification notes on restrictor requirements, throttle bodies, Mazda 12A engine spec, and P2 auto-based engine rules.
As printed in Fastrack
In P Engine Table, Spec Line D notes, add the following: "No restrictor required at 1150 lbs. minimum weight." In P Engine Table, Spec Line G notes, add the following: "Group CN non-composite chassis with Honda K20A-FD2 may use unrestricted individual throttle bodies at 1500 lbs. minimum weight." In P Table 1, Beasley B2 spec line notes, add the following: "Engine must be Mazda 12A rotary with 40.5mm venturi. Car must comply with all other Prototype requirements." In P Table 1, P2 cars built to 2000cc auto-based specification spec line notes, add the following:
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"Car must comply with all other P2 rules applicable to cars using stock production-based four-cylinder automotive engines. Note: Competitors are also free to modify their cars to comply with the general Prototype rules and Engine Table Spec Line H instead."
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."
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."
P RM 25-05 - Prototype Engine Table A, 2 Cycle Restrictor Change
unclearP class 13B rotary engine restrictor changes to 40mm SIR fuel injection or 41.5mm venturi carburetor.
As printed in Fastrack
Effective 9/1/25 in Prototype Engine Table, Spec Line K, change the restrictor as follows: "40mm SIR with fuel injection or 41.5mm venturi with carburetor"
P Add Radical Cup series Radical SR3 spec line to Table 1
wordingPrototype P2 cars may now run P2 spec or modified Prototype spec in Prototype class; clarified language and added Radical Cup series table.
As printed in Fastrack
Effective 9/1/25, in Prototype, GCR section 9.1.8.B.K, change as follows: "P2 cars may compete in either the Prototype class or the P2 class but must participate in the Prototype class to the extent necessary to qualify for an invitation to the Runoffs in Prototype. P2 cars may be modified to comply with the general Prototype rules and Prototype Engine Table or may continue to run in P2 specification in the Prototype class as permitted in Table 1 below." Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
suspension & brakesPrototype carbon-carbon and carbon-ceramic brake rotors now permitted instead of prohibited.
As printed in Fastrack
In Prototype, GCR section 9.1.8.B.F.2, change as follows: "Brake calipers may be ferrous or aluminum alloy. Effective 1/1/2026, carbon-carbon and carbon-ceramic brake rotors are prohibited and rotors must be ferrous. Brake rotor material is unrestricted."
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.