Quickest here:P2 1:08.991 Tim Day Jr, Cal Club 2023 qualifying
GT3P2solid race · dashed qualifying · slower is lower
Event
GT3
P2
Qual best
Race best
Trap
Qual best
Race best
Trap
vs GT3
% of GT3
Cal Club 2026 CALCL262026-02-21
1:37.278Tim Day Jr · only car+28.287s (+41.00%)
1:39.758Tim Day Jr · only car
155.4Tim Day Jr
52 rule changes (GT3: 42, P2: 10)17 weight · 8 cars added · 6 engine · 3 induction · 2 aero · 2 tyres & wheels · 1 suspension & brakes · 13 wording · GT3U cars must maintain 3.0" minimum ride height on frame rails and 2" minimum on front spoiler and splitter. · GT3U cars with 15×7" wheels add 225 lbs to GT3 weight; wider wheels allowed with weight penalties up to 3.0%. · GT3U with 15x7 wheels and 225 tires gains 75 lbs to 225 lbs over GT3 weight; wheel weight penalties clarified. · TA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof requirement. · GT3 VW Fun Cup Beetle Sealed exempt from 150 lbs consolidation add-on weight. · GT3 Pontiac LE5 Ecotech minimum weight drops 150 lbs to 2195. · P2 2000cc Pinto engine car minimum weight set to 1335 lbs. · GT3 Mazda 13B Bridgeport and Peripheral Port both drop to 2275 lbs minimum weight. · GT3 Nissan MR20DE DOHC engine classified with 1997cc displacement, 32mm restrictor, 2060 lbs minimum weight. · GT3 Mazda 13B minimum weight drops 175 lbs to 2175 lbs. · GT3 Mazda 12A peripheral port minimum weight reduced to 2100 lbs. · GT3 Mazda 3TC classified in TCR with 2950 lbs minimum weight, effective 11/1/2024. · GT3 adds Datsun 1200 B110 (70–73), 90.6 in wheelbase, engine per GT3 spec or alternate Nissan request. · GT3-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. · GT3 Pontiac Sunfire GT weight reduction corrected from 150 lbs to 75 lbs. · GT3 Mazda MZR removes second DOHC option, fuel induction now unrestricted. · GT3 cars may run +1mm SIR above spec with 175 lb weight penalty added. · GT3 turbocharged 1401-1850cc four-valve engine with 35mm restrictor reduced to 34mm, weight to 2250 lbs. · GT2-ST Acura NSX minimum weight raised to 3000 lbs, restrictor increased to 45mm TIR. · GT3 Ford Duratech now allows hood bulge with no openings. · GT3 Acura K20A RSX body disenfranchised from GT2 adds 75 lbs weight penalty. · GT3 Toyota 4Y engine classified at 2030 lbs with unrestricted fuel induction. · GT3 Toyota model designation changes from DR86 to GR86. · GT3 Honda spec lines change engine family designation from bore/displacement to K20C1 and K24 model numbers. · GT3 Mazda spec line numbering changed from 4 to Model, unrestricted to 323, and 2195 to 626. · P2 Spec ECU engine modifications clarified: oil system, ECU, and exhaust unrestricted only. · P2 FIA Group CN spec notes clarified: Series changed to Challenge, documentation requirement moved to online link. · GT3 Miata Turbo restrictor increases to 35 mm, minimum weight rises to 2350 lbs. · GT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed. · GT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors. · GT3 Toyota FA24D engine classified: 2387cc DOHC, 2195 lbs, 32mm SIR, direct injection permitted. · GT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E. · GT3 Nissan QR25DE/DD spec line edit; text unreadable due to formatting corruption. · GT3 Mazda RX7 12A, 13B Bridgeport, 13B Peripheral Port: disenfranchised GT2 adds 75 lbs. · GT3 Mazda BP4W turbocharged OEM engine weight reduced from 2060 to 1960 lbs. · GT3 Mazda 13B peripheral port weight reduced to 2100 lbs. · GT3 adds Toyota GR 86 (DR86) 2021–2024, 2-door RWD, 101.3 in wheelbase. · GT3 Toyota 3S bore increases to 86.0mm, stroke decreases to 86.0mm. · P2 AMAC modified engine range clarified to 2008 and older stock engines only, restrictor 38mm, weight 1025 lbs. · P2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840. · GT3 Toyota 3S DOHC engine classified at 1998 cc, 1960 lbs minimum weight, unrestricted fuel induction. · GT3 2.0L SIR cars lose 32mm unrestricted option, now require restrictor at 2195lbs minimum. · GTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL. · P2 Table 1 corrects engine date ranges and brand specifications for Stock and Modified engines across multiple car models. · GT3-TCR Audi RS3 LMS, Honda Civic Type R, Hyundai i30 N, VW Golf GTi must use 200 tread wear tires only. · GT3 Honda B20 engine newly classified for use in CRX, 1973cc displacement, aluminum head, DOHC. · GT3 cars using 15" American Racer 23.5-10.0-15 bias ply tires avoid weight penalty. · Fields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight. · P2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height. · P2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1. · P2 engine table wording updated; redundant effective date language removed. · P2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.showhide
GT3 GT3U Ride Height #39637suspension & brakessuspension & brakesGT3U cars must maintain 3.0" minimum ride height on frame rails and 2" minimum on front spoiler and splitter.
GT3 Declassify TCR Cars from GT3/GT3U #38569weightslowerGT3U cars with 15×7" wheels add 225 lbs to GT3 weight; wider wheels allowed with weight penalties up to 3.0%.
GT3 Clarification of GT3U #38266weightslowerGT3U with 15x7 wheels and 225 tires gains 75 lbs to 225 lbs over GT3 weight; wheel weight penalties clarified.
GT3 Correct language regarding OEM Areo Devices #37137wordingwordingTA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof requirement.
GT3 VW Funcap weight #37217weightfasterGT3 VW Fun Cup Beetle Sealed exempt from 150 lbs consolidation add-on weight.
GT3 Pontiac Weight and Chassis Adjustment Request #36938weight -150 lbsfasterGT3 Pontiac LE5 Ecotech minimum weight drops 150 lbs to 2195.
P2 2000 cc Pinto Engine Car Weight #37187weightslowerP2 2000cc Pinto engine car minimum weight set to 1335 lbs.
GT3 GCR GT3 Disfranchised GT2 #36291weight -75 lbsfasterGT3 Mazda 13B Bridgeport and Peripheral Port both drop to 2275 lbs minimum weight.
GT3 GT3 Mazda12A PP Correction #37058weight -200 lbsfasterGT3 Mazda 12A peripheral port minimum weight reduced to 2100 lbs.
GT3 2024 Mazda 3 TC request for GT3 #36517cars addedcars addedGT3 Mazda 3TC classified in TCR with 2950 lbs minimum weight, effective 11/1/2024.
GT3 Adding Datsun B110 to List of Approved Cars #36198cars addedcars addedGT3 adds Datsun 1200 B110 (70–73), 90.6 in wheelbase, engine per GT3 spec or alternate Nissan request.
GT3 Honda Civic Type R TCR Weight Reduction Request #36550weightfasterGT3-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.
GT3 Correct missed Disenfranchised weight reduction #36237weightfasterGT3 Pontiac Sunfire GT weight reduction corrected from 150 lbs to 75 lbs.
GT3 errors & omissions on GT3 Mazda MZR spec lines #36241enginefasterGT3 Mazda MZR removes second DOHC option, fuel induction now unrestricted.
GT3 GT3 +1mm SIR add 175lbs. In #36098weightslowerGT3 cars may run +1mm SIR above spec with 175 lb weight penalty added.
GT3 Revised GT3 Built Turbocharged chart #36100inductionslowerGT3 turbocharged 1401-1850cc four-valve engine with 35mm restrictor reduced to 34mm, weight to 2250 lbs.
GT3 Request for Spec Line 1010 Reconsideration #35009weight +300 lbsslowerGT2-ST Acura NSX minimum weight raised to 3000 lbs, restrictor increased to 45mm TIR.
GT3 Mazda MZR Engines #35753aeroaeroGT3 Ford Duratech now allows hood bulge with no openings.
GT3 Disenfranchised GT2 Acura RSX to Run GT3 #35773weightslowerGT3 Acura K20A RSX body disenfranchised from GT2 adds 75 lbs weight penalty.
GT3 Toyota 4Y Engine Request #35885cars addedcars addedGT3 Toyota 4Y engine classified at 2030 lbs with unrestricted fuel induction.
GT3 GT3 spec lines clean-up #36008wordingwordingGT3 Toyota model designation changes from DR86 to GR86.
GT3 GT3 Honda spec line clean-up x 2 #36009wordingwordingGT3 Honda spec lines change engine family designation from bore/displacement to K20C1 and K24 model numbers.
GT3 GT3 Mazda spec line clean-up x2 #36010wordingwordingGT3 Mazda spec line numbering changed from 4 to Model, unrestricted to 323, and 2195 to 626.
P2 E&O - Correct FIA Group CN spec line notes #35900wordingwordingP2 FIA Group CN spec notes clarified: Series changed to Challenge, documentation requirement moved to online link.
GT3 Miata Turbo Clarification #35386weight +100 lbsslowerGT3 Miata Turbo restrictor increases to 35 mm, minimum weight rises to 2350 lbs.
GT3 Rear Blade Spoiler Clarification #35261aerofasterGT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed.
GT3 GT Direct Injection allowance and rules #35437enginefasterGT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors.
GT3 Request to Include Toyota FA24D Engine for use in GT3 #35199cars addedcars addedGT3 Toyota FA24D engine classified: 2387cc DOHC, 2195 lbs, 32mm SIR, direct injection permitted.
GT3 GT2/3 remove Direction Injection not allowed in Spec line notes #35439inductionfasterGT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E.
GT3 Edit GT3 Nissan QR25DE/DD spec line #35442wordingunclearGT3 Nissan QR25DE/DD spec line edit; text unreadable due to formatting corruption.
GT3 Turbo Help #35042weight -100 lbsfasterGT3 Mazda BP4W turbocharged OEM engine weight reduced from 2060 to 1960 lbs.
GT3 Competition Adjustment Request for 13B Peripheral Port #35100weight -100 lbsfasterGT3 Mazda 13B peripheral port weight reduced to 2100 lbs.
GT3 Request to Include Toyota GR 86 in GT3 #35197cars addedcars addedGT3 adds Toyota GR 86 (DR86) 2021–2024, 2-door RWD, 101.3 in wheelbase.
GT3 Fastrack Toyota 3S Correction #35258engineunclearGT3 Toyota 3S bore increases to 86.0mm, stroke decreases to 86.0mm.
P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225wordingwordingP2 AMAC modified engine range clarified to 2008 and older stock engines only, restrictor 38mm, weight 1025 lbs.
P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engineunclearP2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840.
GT3 Toyota Engine Classification Request #35019engineengineGT3 Toyota 3S DOHC engine classified at 1998 cc, 1960 lbs minimum weight, unrestricted fuel induction.
GT3 GT3 2.0L SIR & weight #35171inductionslowerGT3 2.0L SIR cars lose 32mm unrestricted option, now require restrictor at 2195lbs minimum.
GT3 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453wordingwordingGTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL.
P2 Correct Table 1 for Engine Date Range Specifications #35182wordingwordingP2 Table 1 corrects engine date ranges and brand specifications for Stock and Modified engines across multiple car models.
GT3 GT3 TCR 200 TW tires #34993tyres & wheelsslowerGT3-TCR Audi RS3 LMS, Honda Civic Type R, Hyundai i30 N, VW Golf GTi must use 200 tread wear tires only.
GT3 Classify Honda B20 engine in GT3 CRX #34781cars addedcars addedGT3 Honda B20 engine newly classified for use in CRX, 1973cc displacement, aluminum head, DOHC.
GT3 Addendum to letter 33913, GT3 DOT tires. #34627tyres & wheelsfasterGT3 cars using 15" American Racer 23.5-10.0-15 bias ply tires avoid weight penalty.
GT3 Please classify Fields Cardinal V8 #33784cars addedcars addedFields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight.
P2 Clarify minimum side body height requirement #34143wordingwordingP2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height.
P2 Clarify closed cockpit single seat car allowance #34144wordingwordingP2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1.
P2 Remove redundant effective date language and update engine table #34012wordingwordingP2 engine table wording updated; redundant effective date language removed.
P2 E&O - Correct dimensional equivalents #34038engineslowerP2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.
Cal Club 2023 CALCL232023-02-24
1:08.991Tim Day Jr · fastest of 2
93 earlier rule changes on record, in force before Cal Club 2023 (from 2019)26 cars added · 19 induction · 10 engine · 4 aero · 3 weight · 1 removed · 1 tyres & wheels · 28 wording · 1 other · GT3 Nissan VG30 engine removed from class entirely. · GT3 normally aspirated cars may use intake chokes instead of SIRs, fitted to each carburetor barrel, same size as required SIR. · GT3 2.0L 4-valve non-turbo engines may run unrestricted at 2060 lbs instead of with a choke restriction. · Sebeco NP01-EVO and Elan NP01 Mazda 2.0L MZR added to P2, 1600 lb minimum, no restrictor required. · P2 Radical SR3/SR4/Cup/Club Sport/Pro-Sport/PR6 removes assisted shifting requirement across all spec lines. · P2 chassis rules clarified to allow composite materials in non-fully-composite construction; anti-intrusion panel attachment standardized; Stohr and converted F600 cars added with specific allowances. · Unable to summarize: the change to P2 Engine Table Spec Line B.1 is not detailed in the provided text. · GT3 Mazda BP4W Turbocharged OEM engine added at 2060 lbs with 34mm TIR and IHI RHF5 VJ35 turbocharger. · GT2 TA2 and GTA throttle body part numbers updated to GM 90mm electronic #12570790 or Edelbrock 90mm mechanical #33869 or #3870. · GT3 Nissan SR20VET turbo changes to GT2860RS and allows open ECU instead of OEM stock. · GT3 adds 84-87 Civic 3dr FWD, hood bulge allowed, no openings. · GT3 Turbo maximum displacement increases from 1800 cc to 1850 cc. · GT taillights may now be original style or a panel graphic with functioning red LED brake lamps; wording change only. · GT3 Nissan SR20VET Limited Prep-Turbocharged OEM engine classified, 1998cc DOHC with Garrett GT2560LS turbo, 2060 lbs. · GT3 Fiat 124 Spider model name corrected from Pininfarina to Pininfarina Spider. · GT3 Fiat 124 Spider Pininfarina reclassified by model year, body style, drivetrain, and wheelbase. · GT3 cars can use up to 18" wheels with 12.0" tire cross section and 26.0" diameter at 5% weight penalty, down from 8%. · P2 chassis construction rules clarified: fully composite or partially composite requiring composite for mobility allowed; partial composite must roll without composite parts. · P2 classification wording cleaned up in GCR section 9.1.8.C and Contents. · GT3-TCR: Audi RS3 LMS SEQ power to 90%, weight to 3177 lbs; RS3 LMS DSG power to 90%; Honda Civic Type R power to 90%, weight to 3210 lbs; Hyundai i30N power to 90%, weight to 3254 lbs; VW Golf GTI SEQ power to 90%, weight to 3177 lbs; Gol… · P2 Oldsmobile cam rules clarify aftermarket manufacturer requirements; wording only. · GT3 Ginetta G40 classified with Mazda MZR 1999cc at 2060 lbs or Ford Duratec 2260cc at 2195 lbs. · GT3 Mazda MZR DOHC 1999cc classified with 2195 lbs minimum weight, unrestricted fuel induction. · Volvo S60 2000-2009 classified in GT3. · GT3 2.0L 4V engines now unrestricted at 2195 lbs minimum weight across all makes. · GT3 wing wording corrected: single element airfoil scaled changed to up to maximum chord 10.75 inches. · P2 adds Beasley B2 spec line with 1350 lbs, Mazda 12A, 40.5mm venturi, 16.5in wing. · P2 wing specs correct terminology from 'cord' to 'chord' for 16.5in single or dual element wings. · P2 Converted F5 cars reclassified as Converted F500 cars; suspension must comply with F500 requirements, minimum width 55 inches. · GT3 adds Fiat Spider 2000, Years 79-81, RWD, 89.76" wheelbase. · GT3 adds Fiat X-19, years 72-89. · P2 motorcycle engines increase to 1505cc max, two-stroke to 1205cc max; automotive engines gain 50 lbs minimum weight to 1350. · P2 Control Area definition narrowed; aerodynamic attachments and vertical structures like turning vanes now prohibited. · GT3 Fun Cup Beetle Sealed weight reduced 210 lbs, to 1850. · GT3-TCR class added: Audi RS3 LMS, Honda Civic Type R, Hyundai i30N, VW Golf GTI at 3100–3200 lbs with 200 tread wear tires. · P2 Engine Table Spec Line B.1 changed effective 1-1-22, details not provided in excerpt. · P2 Control Area definition clarified: floor extensions and aerodynamic attachments on bottom or top side now explicitly included. · GT3 Ford Cortina GT 1964-1968 newly classified for competition. · GT3 Fun Cup Beetle EVO3 classified with 1984 cc sealed SOHC engine, 2060 lbs minimum weight. · P2 CN Honda K20A-FD2 engine rebuild rules clarified: machining prohibition replaced with specific restrictions on balancing, porting, polishing, valve jobs, cylinder honing. · GTA part numbers updated: 0-80541-1 to 0-80541-2 in two sections and 6010 to 6014X in TA2 Appendix. · Converted F5 cars in P2 minimum width reduced to 55 inches from F5 spec. · P2 clarifies minimum body width requirement between front and rear wheels for Ralt RT40, RT41, Swift 008, 014. · GT3 now permits current FP spec line cars to compete while maintaining their full FP rule set. · GT3 Mazda MZR 2.0L fuel induction restrictor increases from 31 to 32 mm. · GT3 Mazda Renesis and 13B Bridgeport choke reduced from 44mm to 42mm. · P2 tonneau covers now allowed to meet minimum dimensions; equipment attachment requirements clarified. · P2 multiple chassis models remove effective dates from Table 1 specifications. · P2 engines limited to 4 valves per cylinder maximum across all three spec lines. · P2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front and 14-15 rear wheel width. · GT3 Mazda MZR and MZR/L5-VE fuel induction sizing changes from 31 to 32. · GT3 Honda Prelude 1992-1997 classified, 2dr FWD, 104 inch wheelbase. · P2 Honda K20A-FD2 intake restrictor reduced from 55mm to 50mm, making cars faster. · GT1, GT2, GT3, GTL, GTX now permit turbocharging/supercharging if listed on spec line. · P2 rear wing requirements clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 110cm width wing 9×18 inches, end plates 14×18 inches. · GT3 Mazda 12A Peripheral Port added to rule set, 2300 cc, 2292 lbs. · TA2 Gurney flap wording clarified: terminology standardized to 'Gurney flap', height limits and thickness specifications remain 0.50 inch / 0.625 inch or 0.375 inch / 0.0625 inch depending on configuration. · STO rear wing wording clarified: 'wicker' changed to 'Gurney flap' in maximum chord and mounting height rules. · GT classes clarify Gurney flap wording, replacing wickerbill/tab terminology with flap; specifications unchanged. · GT3 4v SIR 4-cylinder engines across multiple brands increase fuel induction from 31 to 32. · GT3 and STU add Borg-Warner EFR6258 to approved turbocharger list. · GT3 Nissan KA24E loses permission to use 32mm chokes at 2280 lbs for 2011-2012 only. · Elan NP01 classified in P2 Table 1 as Spec Line car with 2000cc displacement and P2 Engine Table restrictor. · P2 Enterprises Sports Racer adds 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR. · P2 Enterprise Sports Racer 2.3L engine now requires SIR or Flat Plate restrictor sized in 0.5mm increments. · GT3 Mazda MZR L5-VE gets 31mm SIR restrictor, weight up from 1950 to 2195 lbs, direct injection banned. · P2 fly-by-wire throttle control wording clarified: stock ECUs with drive-by-wire must activate original throttle shaft mechanism. · GT1, GT2, GT3, GTL, GTX may omit windshield clips if factory glass is bonded per original specifications. · Factory Five Type 65 Coupe R with Ford 302/351 or 5.0/5.2L NA added to GTX-MISC at 2600 lbs. · GT3 Mazda 13B Bridgeport restrictor reduced from 44mm to 42mm. · GT3 Alfa Romeo 4C classified with 1742cc engine, 33mm TIR restrictor, 2325 lbs minimum weight. · GT3 Mazda MZR/L5-VE gets unrestricted induction, drops 245 lbs to 1950, limited to GT2 prep. · GT3 Honda K20C1 turbocharged engine added with 33 mm TIR restrictor, 2350 lbs minimum weight. · GT3 wing end plates change from 11.00 by 4.00 inches rectangle to maximum 64 square inches. · P2 adds BMW to motorcycle-based engine options in 4-cycle line alongside Kawasaki, Suzuki, Yamaha, Honda. · GT3 Nissan adds SR16VE engine, 1596cc, 1690 lbs, unrestricted induction. · P2 Honda K20A-FD2 non-composite chassis must use 55mm flat plate intake restrictor at 1500 lbs minimum weight. · GT3 Mazda 12A Bridgeport gains optional 42mm choke at 2010 lbs minimum weight. · P2 motorcycle engines: Stock restrictor 36.5mm to 35mm, modified 37.5mm to 34mm; B.5 restrictor 37.5mm to 33mm. All weights increase 25 lbs. · P2 cars limited to power application on maximum two wheels, effective 2019-07-01. · P2 Enterprise minimum weight increases to 1375 lbs; peak horsepower of sealed ESR engine reduced per CRB specification. · GTX tube frame cars gain fuel injection with 90mm maximum throttle body size. · Ligier JS2 R classified in GTX, no performance parameters specified in filing. · GT3 Mazda 13B and Renesis engines reclassified with new weight specs ranging 2080–2350 lbs. · GT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b. · GT3 13B and Renesis rotaries gain 200 lbs minimum weight; 13B Peripheral Port to 2400, Bridge Port to 2400, Renesis Peripheral Port to 2450, Bridge Port to 2450. · GT3 adds Mitsubishi 4G69 SOHC 2378cc engine, 2195 lbs minimum weight, 31mm SIR. · P2 stock engine restrictor shrinks to 35.0mm and weight rises to 1025 lbs; modified engine restrictor to 34.0mm, weight to 1125 lbs; line B.5 restrictor to 33.0mm, weight to 1185 lbs. · P2 Line A.1 restrictor reduced from 40mm to 38mm. · GTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified. · P2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lbs with 30mm restrictor. · P2 Group CN Honda K20A-FD2 55mm restrictor implementation delayed from 1/1/2019 to 3/1/2019. · P2 Honda K20A-FD2 in CN chassis must use stock intake manifold with 64mm throttle body and 55mm restrictor at 1500 lbs minimum weight.showhide
GT3 Remove Nissan VG30 engine from GT3 #33609removedremovedGT3 Nissan VG30 engine removed from class entirely.
GT3 GT3 Choke option effective 1-01-2023 #33669inductioninductionGT3 normally aspirated cars may use intake chokes instead of SIRs, fitted to each carburetor barrel, same size as required SIR.
GT3 GT3 2.0L choke/weight option #33670inductionfasterGT3 2.0L 4-valve non-turbo engines may run unrestricted at 2060 lbs instead of with a choke restriction.
P2 Request to Classify Sebeco NP01 #33378cars addedcars addedSebeco NP01-EVO and Elan NP01 Mazda 2.0L MZR added to P2, 1600 lb minimum, no restrictor required.
P2 Radical spec line clarifications #33485wordingwordingP2 Radical SR3/SR4/Cup/Club Sport/Pro-Sport/PR6 removes assisted shifting requirement across all spec lines.
P2 E&O original class intent #33519wordingwordingP2 chassis rules clarified to allow composite materials in non-fully-composite construction; anti-intrusion panel attachment standardized; Stohr and converted F600 cars added with specific allowances.
P2 Update Engine Table Spec Line B.1 #33608engineunclearUnable to summarize: the change to P2 Engine Table Spec Line B.1 is not detailed in the provided text.
GT3 Turbocharged Engine Rules #33145cars addedcars addedGT3 Mazda BP4W Turbocharged OEM engine added at 2060 lbs with 34mm TIR and IHI RHF5 VJ35 turbocharger.
GT3 GT2 (TA2)/GTA Part Number Update #33315wordingwordingGT2 TA2 and GTA throttle body part numbers updated to GM 90mm electronic #12570790 or Edelbrock 90mm mechanical #33869 or #3870.
GT3 GT3 Nissian SR20VET unrestricted ECU change #33432enginefasterGT3 Nissan SR20VET turbo changes to GT2860RS and allows open ECU instead of OEM stock.
GT3 GT3 Turbo Displacement Clarification #32952enginefasterGT3 Turbo maximum displacement increases from 1800 cc to 1850 cc.
GT3 Tail lights on all GT category race cars. #32799wordingwordingGT taillights may now be original style or a panel graphic with functioning red LED brake lamps; wording change only.
GT3 Correct Model GT3 - Fiat #32776wordingwordingGT3 Fiat 124 Spider model name corrected from Pininfarina to Pininfarina Spider.
GT3 Correct Fiat Spider Years #32149wordingwordingGT3 Fiat 124 Spider Pininfarina reclassified by model year, body style, drivetrain, and wheelbase.
GT3 wheel size addition #32247tyres & wheelsfasterGT3 cars can use up to 18" wheels with 12.0" tire cross section and 26.0" diameter at 5% weight penalty, down from 8%.
P2 E&O Clarification of Chassis Construction Requirements #32469wordingwordingP2 chassis construction rules clarified: fully composite or partially composite requiring composite for mobility allowed; partial composite must roll without composite parts.
P2 Clean up P2 wording #32525wordingwordingP2 classification wording cleaned up in GCR section 9.1.8.C and Contents.
GT3 GT3 TCR Car Feedback #31677engine +2 lbsslowerGT3-TCR: Audi RS3 LMS SEQ power to 90%, weight to 3177 lbs; RS3 LMS DSG power to 90%; Honda Civic Type R power to 90%, weight to 3210 lbs; Hyundai i30N power to 90%, weight to 3254 lbs; VW Golf GTI SEQ power to 90%, weight to 3177 lbs; Gol…
P2 After Market to Aftermarket #32373wordingwordingP2 Oldsmobile cam rules clarify aftermarket manufacturer requirements; wording only.
GT3 Request to Classify Ginetta G40 in GT3 #31598cars addedcars addedGT3 Ginetta G40 classified with Mazda MZR 1999cc at 2060 lbs or Ford Duratec 2260cc at 2195 lbs.
GT3 Volvo S60 in GT3 #31970cars addedcars addedVolvo S60 2000-2009 classified in GT3.
GT3 GT3 2.0L 4V engines now unrestricted. #32190enginefasterGT3 2.0L 4V engines now unrestricted at 2195 lbs minimum weight across all makes.
GT3 TB correction to wing wording #32191wordingwordingGT3 wing wording corrected: single element airfoil scaled changed to up to maximum chord 10.75 inches.
P2 Add spec line for Beasley B2 #32147cars addedcars addedP2 adds Beasley B2 spec line with 1350 lbs, Mazda 12A, 40.5mm venturi, 16.5in wing.
P2 E&O Table 1 spec line wing terminology #32148wordingwordingP2 wing specs correct terminology from 'cord' to 'chord' for 16.5in single or dual element wings.
P2 E&O class name #32196wordingwordingP2 Converted F5 cars reclassified as Converted F500 cars; suspension must comply with F500 requirements, minimum width 55 inches.
GT3 Request to add Fiat to GT3 CARS #31803cars addedcars addedGT3 adds Fiat Spider 2000, Years 79-81, RWD, 89.76" wheelbase.
GT3 Request to add Fiat to GT3 CARS #31804cars addedcars addedGT3 adds Fiat X-19, years 72-89.
P2 E&O Engine section #31969enginefasterP2 motorcycle engines increase to 1505cc max, two-stroke to 1205cc max; automotive engines gain 50 lbs minimum weight to 1350.
P2 E&O letter #31539 – Control Area definition #31783aeroslowerP2 Control Area definition narrowed; aerodynamic attachments and vertical structures like turning vanes now prohibited.
GT3 31032 correction to weight #31525weight -210 lbsfasterGT3 Fun Cup Beetle Sealed weight reduced 210 lbs, to 1850.
GT3 Add TCR cars to GT3 #31540cars addedcars addedGT3-TCR class added: Audi RS3 LMS, Honda Civic Type R, Hyundai i30N, VW Golf GTI at 3100–3200 lbs with 200 tread wear tires.
P2 BoP adjustment effective 1-1-22 #31538wordingunclearP2 Engine Table Spec Line B.1 changed effective 1-1-22, details not provided in excerpt.
P2 E&O clarification of "Control Area" definition #31539wordingwordingP2 Control Area definition clarified: floor extensions and aerodynamic attachments on bottom or top side now explicitly included.
GT3 Please approve 1964-1968 Ford Cortina GT for competition in GT# #30941cars addedcars addedGT3 Ford Cortina GT 1964-1968 newly classified for competition.
GT3 Request car classification #31032cars addedcars addedGT3 Fun Cup Beetle EVO3 classified with 1984 cc sealed SOHC engine, 2060 lbs minimum weight.
P2 P2 CN Engine Rebuild Clarification #31000wordingwordingP2 CN Honda K20A-FD2 engine rebuild rules clarified: machining prohibition replaced with specific restrictions on balancing, porting, polishing, valve jobs, cylinder honing.
GT3 Request to Update GTA Obsolete Part Numbers #30615wordingwordingGTA part numbers updated: 0-80541-1 to 0-80541-2 in two sections and 6010 to 6014X in TA2 Appendix.
P2 F5 P2 Conversion #30856aerofasterConverted F5 cars in P2 minimum width reduced to 55 inches from F5 spec.
P2 Clarify minimum body width requirement #30859wordingwordingP2 clarifies minimum body width requirement between front and rear wheels for Ralt RT40, RT41, Swift 008, 014.
GT3 Request to Permit FP cars in GT3 #30611cars addedcars addedGT3 now permits current FP spec line cars to compete while maintaining their full FP rule set.
GT3 Mazda MZR 2.0L Engine #30455inductionfasterGT3 Mazda MZR 2.0L fuel induction restrictor increases from 31 to 32 mm.
GT3 Disfranchised GT3 Mazda, correct choke size #30570inductionslowerGT3 Mazda Renesis and 13B Bridgeport choke reduced from 44mm to 42mm.
P2 E&O tonneau cover provision in cockpit opening section #30459wordingwordingP2 tonneau covers now allowed to meet minimum dimensions; equipment attachment requirements clarified.
P2 Remove effective dates in Table 1 #30468wordingwordingP2 multiple chassis models remove effective dates from Table 1 specifications.
P2 E&O Maximum Valves Per Cylinder #30560engineengineP2 engines limited to 4 valves per cylinder maximum across all three spec lines.
P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272cars addedcars addedP2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front and 14-15 rear wheel width.
GT3 Mazda MZR SIR Sizing #29555inductionfasterGT3 Mazda MZR and MZR/L5-VE fuel induction sizing changes from 31 to 32.
GT3 Request to Classify 1992-1997 Honda Prelude #29687cars addedcars addedGT3 Honda Prelude 1992-1997 classified, 2dr FWD, 104 inch wheelbase.
P2 Balance of Performance adjustments effective 01-01-2021 #29822inductionfasterP2 Honda K20A-FD2 intake restrictor reduced from 55mm to 50mm, making cars faster.
GT3 GT Category Wording #29193wordingunclearGT1, GT2, GT3, GTL, GTX now permit turbocharging/supercharging if listed on spec line.
P2 E&O clarification of P2 rear wing requirements #29205aeroaeroP2 rear wing requirements clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 110cm width wing 9×18 inches, end plates 14×18 inches.
GT3 Request to add Mazda 12A Peripheral Port to GT3 rule set #28842cars addedcars addedGT3 Mazda 12A Peripheral Port added to rule set, 2300 cc, 2292 lbs.
GT3 TA2 Gurney flap wicker clarification #28874wordingwordingTA2 Gurney flap wording clarified: terminology standardized to 'Gurney flap', height limits and thickness specifications remain 0.50 inch / 0.625 inch or 0.375 inch / 0.0625 inch depending on configuration.
GT3 STO Gurney flap wicker clarification #28883wordingwordingSTO rear wing wording clarified: 'wicker' changed to 'Gurney flap' in maximum chord and mounting height rules.
GT3 GT3 4v SIR size increase. #28931inductionfasterGT3 4v SIR 4-cylinder engines across multiple brands increase fuel induction from 31 to 32.
GT3 Request for Addition to GT3 Approved Turbo List #27576wordingwordingGT3 and STU add Borg-Warner EFR6258 to approved turbocharger list.
GT3 Request Nissan KA24E specifications #28808inductionslowerGT3 Nissan KA24E loses permission to use 32mm chokes at 2280 lbs for 2011-2012 only.
P2 Classify Elan NP01 in P2 Table 1 #28812cars addedcars addedElan NP01 classified in P2 Table 1 as Spec Line car with 2000cc displacement and P2 Engine Table restrictor.
P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669engineengineP2 Enterprises Sports Racer adds 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR.
P2 Add ESR inlet restrictor #27869inductionslowerP2 Enterprise Sports Racer 2.3L engine now requires SIR or Flat Plate restrictor sized in 0.5mm increments.
GT3 Error Regarding Mazda Engine Listing #28119induction +245 lbsslowerGT3 Mazda MZR L5-VE gets 31mm SIR restrictor, weight up from 1950 to 2195 lbs, direct injection banned.
P2 Request for Fly by Wire Rule Wording Change #28247wordingwordingP2 fly-by-wire throttle control wording clarified: stock ECUs with drive-by-wire must activate original throttle shaft mechanism.
GT3 Windshield Clips #27323wordingwordingGT1, GT2, GT3, GTL, GTX may omit windshield clips if factory glass is bonded per original specifications.
GT3 Request Factory Five Daytona coupe classification #26308cars addedcars addedFactory Five Type 65 Coupe R with Ford 302/351 or 5.0/5.2L NA added to GTX-MISC at 2600 lbs.
GT3 Request restrictor size change request #26958inductionslowerGT3 Mazda 13B Bridgeport restrictor reduced from 44mm to 42mm.
GT3 Request to Classify Alfa Romeo 4C #27322cars addedcars addedGT3 Alfa Romeo 4C classified with 1742cc engine, 33mm TIR restrictor, 2325 lbs minimum weight.
GT3 Request for Mazda 2.5l MZR/L5-VE #27570induction -245 lbsfasterGT3 Mazda MZR/L5-VE gets unrestricted induction, drops 245 lbs to 1950, limited to GT2 prep.
GT3 GT3 turbo engines add Honda #28033cars addedcars addedGT3 Honda K20C1 turbocharged engine added with 33 mm TIR restrictor, 2350 lbs minimum weight.
GT3 GT3 wing end plate #28035aerounclearGT3 wing end plates change from 11.00 by 4.00 inches rectangle to maximum 64 square inches.
P2 Request for addition of BMW Engine in P2 Engine Table #27821cars addedcars addedP2 adds BMW to motorcycle-based engine options in 4-cycle line alongside Kawasaki, Suzuki, Yamaha, Honda.
P2 Update Engine Table Line E notes #27414inductionslowerP2 Honda K20A-FD2 non-composite chassis must use 55mm flat plate intake restrictor at 1500 lbs minimum weight.
GT3 Requesting Increase in Choke Diameter for Mazda 12A Bridgeport #27043inductionfasterGT3 Mazda 12A Bridgeport gains optional 42mm choke at 2010 lbs minimum weight.
P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254inductionslowerP2 motorcycle engines: Stock restrictor 36.5mm to 35mm, modified 37.5mm to 34mm; B.5 restrictor 37.5mm to 33mm. All weights increase 25 lbs.
P2 E&O Transmissions #27006otherslowerP2 cars limited to power application on maximum two wheels, effective 2019-07-01.
P2 Request to restrict all cars #26246weightslowerP2 Enterprise minimum weight increases to 1375 lbs; peak horsepower of sealed ESR engine reduced per CRB specification.
GT3 Request GTX Fuel injection for previous GT-1 tube frame cars #26141inductionfasterGTX tube frame cars gain fuel injection with 90mm maximum throttle body size.
GT3 Request to Classify Ligier JS2 R #26535cars addedcars addedLigier JS2 R classified in GTX, no performance parameters specified in filing.
GT3 26076 revised Spec line chart #26528engineunclearGT3 Mazda 13B and Renesis engines reclassified with new weight specs ranging 2080–2350 lbs.
GT3 Request Ride Height Clarification #26600wordingwordingGT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b.
GT3 Request clarification on bridge porting for rotary #26076weightslowerGT3 13B and Renesis rotaries gain 200 lbs minimum weight; 13B Peripheral Port to 2400, Bridge Port to 2400, Renesis Peripheral Port to 2450, Bridge Port to 2450.
P2 Change Engine Table Lines B.1 & B.5 #25777inductionslowerP2 stock engine restrictor shrinks to 35.0mm and weight rises to 1025 lbs; modified engine restrictor to 34.0mm, weight to 1125 lbs; line B.5 restrictor to 33.0mm, weight to 1185 lbs.
P2 Change Line A.1 restrictor size #26429inductionslowerP2 Line A.1 restrictor reduced from 40mm to 38mm.
GT3 GTX Homologation table update #26034cars addedcars addedGTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified.
P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595enginefasterP2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lbs with 30mm restrictor.
P2 Change CN inlet restrictor implementation date #25816wordingwordingP2 Group CN Honda K20A-FD2 55mm restrictor implementation delayed from 1/1/2019 to 3/1/2019.
P2 Clarify Honda K20A-FD2 parts requirement #25950inductionslowerP2 Honda K20A-FD2 in CN chassis must use stock intake manifold with 64mm throttle body and 55mm restrictor at 1500 lbs minimum weight.
Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. "% of GT3" is the class's best as a share of GT3's best at the same event (100% is level, less is quicker): weather and track condition move every class together, so this compares across years where the raw times do not. It still breaks when GT3's own field changes or one session was wet and another dry. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.