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GT2 vs AS vs SRF3 pace at every track

Lap times across years say as much about the weather as the class. % of GT2 is each class's best lap as a share of GT2's on the same day, so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.

Class · click a class to switch, + to compare alongside (up to 4)
vsAS×B-Spec+EP+FA+FC+FE2+FF+FP+FV+FX+GT1+GT2×GTX+HP+P+P2+SM+SMX+vsSRF3×STL+STU+T1+T2+T3+T4+Show 51 inactive classes
Series
Reference · what % is measured against, 12 events
Tracks · untick to narrow

Closest to the field: GT2 100.0% of GT2 Jordan Bupp, Daytona International Speedway Runoffs 2015 race · AS 89.6% of GT2 Gregory Eaton, Indianapolis Motor Speedway Runoffs 2021 race · SRF3 89.1% of GT2 John Black, Indianapolis Motor Speedway Runoffs 2021 race

1:402:002:2028 rule changes between Runoffs 2018 and Runoffs 201928 ▾49 rule changes between Runoffs 2019 and Runoffs 202049 ▾36 rule changes between Runoffs 2020 and Runoffs 202136 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾27 rule changes between Runoffs 2022 and Runoffs 202327 ▾34 rule changes between Runoffs 2023 and Runoffs 202434 ▾21 rule changes between Runoffs 2024 and Runoffs 202521 ▾28 rule changes between Runoffs 2025 and Runoffs 202628 ▾GT2 race best at Runoffs 2015: 1:53.543 (Jordan Bupp)GT2 race best at Runoffs 2016: 1:26.847 (Andrew Aquilante)GT2 race best at Runoffs 2017: 1:40.976 (Andrew Aquilante)GT2 race best at Runoffs 2018: 1:38.524 (R Spencer Trenery)GT2 race best at Runoffs 2019: 1:52.475 (Andrew Aquilante)GT2 race best at Runoffs 2020: 2:14.279 (Andrew Aquilante)GT2 race best at Runoffs 2021: 2:03.513 (Tim Kezman)GT2 race best at Runoffs 2022: 1:53.048 (Daniel Bender)GT2 race best at Runoffs 2023: 1:52.865 (Jared Odrick)GT2 race best at Runoffs 2024: 2:13.311 (John Atwell)GT2 race best at Runoffs 2025: 2:13.447 (John Atwell)GT2 race best at Runoffs 2026: 2:10.650 (John Atwell)GT2 qualifying best at Runoffs 2015: 1:53.652 (Jordan Bupp)GT2 qualifying best at Runoffs 2016: 1:25.405 (Andrew Aquilante)GT2 qualifying best at Runoffs 2017: 1:39.919 (Andrew Aquilante)GT2 qualifying best at Runoffs 2018: 1:37.203 (Andrew Aquilante)GT2 qualifying best at Runoffs 2019: 1:50.182 (Andrew Aquilante)GT2 qualifying best at Runoffs 2020: 2:12.298 (Andrew Aquilante)GT2 qualifying best at Runoffs 2021: 1:39.665 (Andrew Aquilante)GT2 qualifying best at Runoffs 2022: 1:51.086 (Andrew Aquilante)GT2 qualifying best at Runoffs 2023: 1:52.004 (Barry Boes)GT2 qualifying best at Runoffs 2024: 2:11.860 (Charlie Peter)GT2 qualifying best at Runoffs 2025: 2:11.807 (Brad McAllister)GT2 qualifying best at Runoffs 2026: 2:09.634 (John Atwell)AS race best at Runoffs 2015: 2:02.922 (Andy McDermid)AS race best at Runoffs 2016: 1:33.424 (Edward Hosni)AS race best at Runoffs 2017: 1:51.507 (Bryan Long)AS race best at Runoffs 2018: 1:50.345 (John Heinricy)AS race best at Runoffs 2019: 2:03.900 (James Jost)AS race best at Runoffs 2020: 2:27.668 (Gregory Eaton)AS race best at Runoffs 2021: 1:50.606 (Gregory Eaton)AS race best at Runoffs 2022: 2:04.578 (Gregory Eaton)AS race best at Runoffs 2023: 2:04.120 (Gregory Eaton)AS race best at Runoffs 2024: 2:26.429 (Gregory Eaton)AS race best at Runoffs 2025: 2:29.232 (Gregory Eaton)AS race best at Runoffs 2026: 2:28.471 (Andrew McDermid)AS qualifying best at Runoffs 2015: 2:01.746 (Tom Sloe)AS qualifying best at Runoffs 2016: 1:30.651 (Tom Sloe)AS qualifying best at Runoffs 2017: 1:45.220 (James Jost)AS qualifying best at Runoffs 2018: 1:47.782 (Andrew McDermid)AS qualifying best at Runoffs 2019: 2:02.938 (Gregory Eaton)AS qualifying best at Runoffs 2020: 2:27.045 (Gregory Eaton)AS qualifying best at Runoffs 2021: 1:50.427 (Drew Cattell)AS qualifying best at Runoffs 2022: 2:02.162 (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 2:03.082 (Daniel Richardson)AS qualifying best at Runoffs 2024: 2:26.578 (Gregory Eaton)AS qualifying best at Runoffs 2025: 2:26.792 (Andrew McDermid)AS qualifying best at Runoffs 2026: 2:26.911 (Andrew McDermid)SRF3 race best at Runoffs 2015: 2:10.215 (Chad Galloway)SRF3 race best at Runoffs 2016: 1:34.947 (Cliff White)SRF3 race best at Runoffs 2017: 1:49.782 (Tray Ayres)SRF3 race best at Runoffs 2018: 1:47.053 (TJ Acker)SRF3 race best at Runoffs 2019: 2:04.755 (Bobby Sak)SRF3 race best at Runoffs 2020: 2:31.038 (Justin Hille)SRF3 race best at Runoffs 2021: 1:50.095 (John Black)SRF3 race best at Runoffs 2022: 2:22.066 (Franklin Futrelle)SRF3 race best at Runoffs 2023: 2:04.911 (David Ogburn)SRF3 race best at Runoffs 2024: 2:28.129 (S Sandy Satullo III)SRF3 race best at Runoffs 2025: 2:29.839 (Morgan Burkhard)SRF3 race best at Runoffs 2026: 2:29.257 (Peyton Long)SRF3 qualifying best at Runoffs 2015: 2:08.557 (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 1:34.363 (John Black)SRF3 qualifying best at Runoffs 2017: 1:49.824 (John Black)SRF3 qualifying best at Runoffs 2018: 1:46.117 (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 2:04.624 (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 2:29.786 (TJ Acker)SRF3 qualifying best at Runoffs 2021: 1:49.520 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 2:03.716 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 2:03.842 (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 2:27.773 (Denny Stripling)SRF3 qualifying best at Runoffs 2025: 2:28.226 (Bobby Sak)SRF3 qualifying best at Runoffs 2026: 2:27.443 (Tyler Stephens)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
GT2ASSRF3solid race · dashed qualifying · slower is lower
100%105%110%115%28 rule changes between Runoffs 2018 and Runoffs 201928 ▾49 rule changes between Runoffs 2019 and Runoffs 202049 ▾36 rule changes between Runoffs 2020 and Runoffs 202136 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾27 rule changes between Runoffs 2022 and Runoffs 202327 ▾34 rule changes between Runoffs 2023 and Runoffs 202434 ▾21 rule changes between Runoffs 2024 and Runoffs 202521 ▾28 rule changes between Runoffs 2025 and Runoffs 202628 ▾GT2 race best at Runoffs 2015: 100.0% of GT2's (Jordan Bupp)GT2 race best at Runoffs 2016: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2017: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2018: 100.0% of GT2's (R Spencer Trenery)GT2 race best at Runoffs 2019: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2020: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2021: 100.0% of GT2's (Tim Kezman)GT2 race best at Runoffs 2022: 100.0% of GT2's (Daniel Bender)GT2 race best at Runoffs 2023: 100.0% of GT2's (Jared Odrick)GT2 race best at Runoffs 2024: 100.0% of GT2's (John Atwell)GT2 race best at Runoffs 2025: 100.0% of GT2's (John Atwell)GT2 race best at Runoffs 2026: 100.0% of GT2's (John Atwell)GT2 qualifying best at Runoffs 2015: 100.0% of GT2's (Jordan Bupp)GT2 qualifying best at Runoffs 2016: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2017: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2018: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2019: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2020: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2021: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2022: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2023: 100.0% of GT2's (Barry Boes)GT2 qualifying best at Runoffs 2024: 100.0% of GT2's (Charlie Peter)GT2 qualifying best at Runoffs 2025: 100.0% of GT2's (Brad McAllister)GT2 qualifying best at Runoffs 2026: 100.0% of GT2's (John Atwell)AS race best at Runoffs 2015: 108.3% of GT2's (Andy McDermid)AS race best at Runoffs 2016: 107.6% of GT2's (Edward Hosni)AS race best at Runoffs 2017: 110.4% of GT2's (Bryan Long)AS race best at Runoffs 2018: 112.0% of GT2's (John Heinricy)AS race best at Runoffs 2019: 110.2% of GT2's (James Jost)AS race best at Runoffs 2020: 110.0% of GT2's (Gregory Eaton)Off the chart: AS race best at Runoffs 2021: 89.6% of GT2's (Gregory Eaton)AS race best at Runoffs 2022: 110.2% of GT2's (Gregory Eaton)AS race best at Runoffs 2023: 110.0% of GT2's (Gregory Eaton)AS race best at Runoffs 2024: 109.8% of GT2's (Gregory Eaton)AS race best at Runoffs 2025: 111.8% of GT2's (Gregory Eaton)AS race best at Runoffs 2026: 113.6% of GT2's (Andrew McDermid)AS qualifying best at Runoffs 2015: 107.1% of GT2's (Tom Sloe)AS qualifying best at Runoffs 2016: 106.1% of GT2's (Tom Sloe)AS qualifying best at Runoffs 2017: 105.3% of GT2's (James Jost)AS qualifying best at Runoffs 2018: 110.9% of GT2's (Andrew McDermid)AS qualifying best at Runoffs 2019: 111.6% of GT2's (Gregory Eaton)AS qualifying best at Runoffs 2020: 111.1% of GT2's (Gregory Eaton)AS qualifying best at Runoffs 2021: 110.8% of GT2's (Drew Cattell)AS qualifying best at Runoffs 2022: 110.0% of GT2's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 109.9% of GT2's (Daniel Richardson)AS qualifying best at Runoffs 2024: 111.2% of GT2's (Gregory Eaton)AS qualifying best at Runoffs 2025: 111.4% of GT2's (Andrew McDermid)AS qualifying best at Runoffs 2026: 113.3% of GT2's (Andrew McDermid)SRF3 race best at Runoffs 2015: 114.7% of GT2's (Chad Galloway)SRF3 race best at Runoffs 2016: 109.3% of GT2's (Cliff White)SRF3 race best at Runoffs 2017: 108.7% of GT2's (Tray Ayres)SRF3 race best at Runoffs 2018: 108.7% of GT2's (TJ Acker)SRF3 race best at Runoffs 2019: 110.9% of GT2's (Bobby Sak)SRF3 race best at Runoffs 2020: 112.5% of GT2's (Justin Hille)Off the chart: SRF3 race best at Runoffs 2021: 89.1% of GT2's (John Black)Off the chart: SRF3 race best at Runoffs 2022: 125.7% of GT2's (Franklin Futrelle)SRF3 race best at Runoffs 2023: 110.7% of GT2's (David Ogburn)SRF3 race best at Runoffs 2024: 111.1% of GT2's (S Sandy Satullo III)SRF3 race best at Runoffs 2025: 112.3% of GT2's (Morgan Burkhard)SRF3 race best at Runoffs 2026: 114.2% of GT2's (Peyton Long)SRF3 qualifying best at Runoffs 2015: 113.1% of GT2's (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 110.5% of GT2's (John Black)SRF3 qualifying best at Runoffs 2017: 109.9% of GT2's (John Black)SRF3 qualifying best at Runoffs 2018: 109.2% of GT2's (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 113.1% of GT2's (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 113.2% of GT2's (TJ Acker)SRF3 qualifying best at Runoffs 2021: 109.9% of GT2's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 111.4% of GT2's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 110.6% of GT2's (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 112.1% of GT2's (Denny Stripling)SRF3 qualifying best at Runoffs 2025: 112.5% of GT2's (Bobby Sak)SRF3 qualifying best at Runoffs 2026: 113.7% of GT2's (Tyler Stephens)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
GT2ASSRF3solid race · dashed qualifying · each class's best lap as a share of GT2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventGT2ASSRF3
Qual best Race best Trap Qual best Race best Trap vs GT2 % of GT2 Qual best Race best Trap vs GT2 % of GT2 
Road America Runoffs 20262026-09-282:09.634John Atwell · fastest of 18 · top 5 within 4.3s-2.173s (-1.65%)2:10.650John Atwell · fastest of 18 · top 5 within 4.1s-2.797s (-2.10%)163.0Jack Stanford-0.3 mph (-0.2%)2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)151.0Andrew McDermid-0.6 mph (-0.4%)+17.821squal +17.277s113.6%qual 113.3%2:27.443Tyler Stephens · fastest of 44 · top 5 within 0.3s-0.783s (-0.53%)2:29.257Peyton Long · fastest of 42 · top 5 within 0.3s-0.582s (-0.39%)134.1Bobby Sak+0.4 mph (+0.3%)+18.607squal +17.809s114.2%qual 113.7%
28 rule changes (GT2: 13, AS: 13, SRF3: 2)7 weight · 4 engine · 4 tyres & wheels · 3 cars added · 2 induction · 2 removed · 6 othershowhide
  • AS 2016+ Camaro Spec Line Full Prep #39646tyres & wheels
  • AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheels
  • AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094other
  • AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239weight
  • AS Errors and Omissions #40532weight
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584tyres & wheels
  • GT2 Appendix L Update #39923tyres & wheels
  • GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125other
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838weight -100 lbs
  • GT2 GT2 Porsche 997.2 GT3 Cup #39936weight
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • GT2 Classification Request - Ginetta G56 GT4 (V8) #39625cars added
  • GT2 Remove GT3U from GCR as it is now in STU #39862removed
  • GT2 Audi R8 GT4 remove spec line notes #39864other
  • SRF3 SRF3 Spark Plugs #39899other
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249engine
  • GT2 Classify T1 BMW in GT2 #39408cars added
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • GT2 Additional Body Options to Replace Older Stock Car Bodies #39086other
  • GT2 GT3 Turbo to GT2? #39365induction
  • GT2 Tech Bulletins for GT2 and GT2-ST #39537cars added -100 lbs
  • AS 1994 Mustang Spec Line Request #39104engine
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
  • SRF3 Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:11.807Brad McAllister · fastest of 16 · top 5 within 3.4s-0.053s (-0.04%)2:13.447John Atwell · fastest of 13 · top 5 within 3.6s+0.136s (+0.10%)163.3Charlie Peter-1.0 mph (-0.6%)2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)151.5Andrew McDermid+1.9 mph (+1.3%)+15.785squal +14.985s111.8%qual 111.4%2:28.226Bobby Sak · fastest of 43 · top 5 within 0.6s+0.453s (+0.31%)2:29.839Morgan Burkhard · fastest of 42 · top 5 within 0.3s+1.710s (+1.15%)133.7Bobby Sak-1.5 mph (-1.1%)+16.392squal +16.419s112.3%qual 112.5%
21 rule changes (GT2: 7, AS: 11, SRF3: 3)6 engine · 5 weight · 3 aero · 3 induction · 1 cars added · 3 othershowhide
  • SRF3 SRF Rule Updates #38853weight
  • GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506aero
  • AS RE: Previous Letter 37695 Update #38245weight -75 lbs
  • AS Errors and Omissions #38234engine
  • AS Errors and Omission #38055induction
  • AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197engine
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • SRF3 Driver Safety & Comfort #37966other
  • SRF3 Update SADEV transmission specs #37992other
  • AS Race memo #37902engine
  • GT2 Hood Bulge allowed #37000engine
  • GT2 OEM Wing Adjustment #37590aero
  • GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538weight
  • AS Increase Coyote Engine Restrictor to 80mm #36177induction
  • AS Performance Pack for 2015+ Mustang #36867weight
  • AS Gear Ratios #37131engine
  • AS ECU specs for LS engine #37208engine
  • GT2 Panoz Esperante GTS BOP #36686cars added
  • GT2 Correct language regarding OEM Areo Devices #37137aero
  • GT2 GT2 Sunbeam Tiger Alternate Carburetor #37198induction
Road America Runoffs 20242024-10-012:11.860Charlie Peter · fastest of 23 · top 5 within 1.1s-0.438s (-0.33%)2:13.311John Atwell · fastest of 23 · top 5 within 0.9s-0.968s (-0.72%)164.3Jonathan Start+2.1 mph (+1.3%)2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)149.6Gregory Eaton+0.4 mph (+0.3%)+13.118squal +14.718s109.8%qual 111.2%2:27.773Denny Stripling · fastest of 57 · top 5 within 0.3s-2.013s (-1.34%)2:28.129S Sandy Satullo III · fastest of 52 · top 5 within 0.7s-2.909s (-1.93%)135.2Denny Stripling+3.4 mph (+2.6%)+14.818squal +15.913s111.1%qual 112.1%
34 rule changes (GT2: 13, AS: 11, SRF3: 10)8 cars added · 6 weight · 4 tyres & wheels · 3 engine · 3 suspension & brakes · 2 induction · 1 aero · 2 wording · 5 othershowhide
  • SRF3 Update SRF3 Air Filter Rule #36681other
  • SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF3 Hoosier Tire Decal Placement #36739tyres & wheels
  • AS Mustang transmission ratios #36662engine
  • SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels
  • SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • GT2 GT2-ST Rule Clarification #36093wording
  • GT2 GT4 cars may run in GT2-ST #36235weight
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • SRF3 SRF3 Alternator Pulley Update In #36095weight
  • AS 6th gen Camaro limited prep #35733cars added
  • AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars added
  • AS Full Prep Head #35891other
  • GT2 Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878induction
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars added
  • AS Fuel Cell 12 #34194other
  • AS Please Classify the 6th Gen Into AS. #35448cars added
  • AS spec lines #35713cars added
  • GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759cars added
  • GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408cars added
  • GT2 Rear Blade Spoiler Clarification #35261aero
  • GT2 GT Direct Injection allowance and rules #35437engine
  • GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385weight -150 lbs
  • GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine
  • GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200induction
  • SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF3 SRF / SRF3 Rule Updates #35268weight
  • GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight
  • GT2 Late E & O #34966wording
  • SRF3 SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-231:52.004Barry Boes · fastest of 15 · top 5 within 1.6s+0.918s (+0.83%)1:52.865Jared Odrick · fastest of 15 · top 5 within 1.0s-0.183s (-0.16%)164.0Tom Patton-0.2 mph (-0.1%)2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)154.6James Jost+3.7 mph (+2.5%)+11.255squal +11.078s110.0%qual 109.9%2:03.842Morgan Burkhard · fastest of 40 · top 5 within 0.2s+0.126s (+0.10%)2:04.911David Ogburn · fastest of 39 · top 5 within 0.3s-17.155s (-12.08%)134.5Bobby Sak+0.1 mph (+0.0%)+12.046squal +11.838s110.7%qual 110.6%
27 rule changes (GT2: 19, AS: 4, SRF3: 4)8 induction · 5 tyres & wheels · 4 engine · 4 weight · 2 aero · 2 cars added · 2 suspension & brakesshowhide
  • GT2 GT2 Mazda 20B 3 rotor ENO #34765weight -220 lbs
  • AS Crate Motor Part Numbers #32944engine
  • AS Request wheel size change #33007tyres & wheels
  • AS Alternative Upper Front Control Arms for Dodge Challenger #33352engine
  • AS Front Brake Caliper Adapters for Dodge Challenger #33353suspension & brakes
  • GT2 appendix letter #33635 #34206weight
  • GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342weight
  • SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • GT2 Request to class 2011 Porsche Cayman S #33771cars added
  • GT2 Please classify Fields Cardinal V8 #33784cars added
  • SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825engine
  • SRF3 Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels
  • GT2 GT2 Mazda 13B Turbo #33729induction
  • GT2 Request Permission to Use a Substitute Turbo #33337induction
  • GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342induction
  • GT2 Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine
  • GT2 GT2 Mazda 13b turbocharger part # update #33437induction
  • GT2 GT2-ST BMW E36/46 spec line remove #33610aero
  • GT2 GT3 Choke option effective 1-01-2023 #33669induction
  • GT2 GT3 2.0L choke/weight option #33670weight
  • GT2 BOP adjustment for GT2 & GT2-ST #33681induction
  • GT2 GT2 (TA2)/GTA Part Number Update #33315induction
  • GT2 Ginetta G56 GTA - Optional Wheels #33357tyres & wheels
  • GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447aero
  • GT2 Request for C5/C6 Corvette Restrictor Size Review #32982induction
Virginia International Raceway Runoffs 20222022-09-241:51.086Andrew Aquilante · fastest of 23 · top 5 within 1.1s+0.904s (+0.82%)1:53.048Daniel Bender · fastest of 17 · top 5 within 3.1s+0.573s (+0.51%)164.2Scotty B White+1.4 mph (+0.9%)2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)150.9James Jost-3.0 mph (-2.0%)+11.530squal +11.076s110.2%qual 110.0%2:03.716Franklin Futrelle · fastest of 44 · top 5 within 0.6s-0.908s (-0.73%)2:22.066Franklin Futrelle · fastest of 40 · top 5 within 1.2s+17.311s (+13.88%)134.5David Ogburn+2.1 mph (+1.6%)+29.018squal +12.630s125.7%qual 111.4%
26 rule changes (GT2: 14, AS: 9, SRF3: 3)5 cars added · 4 suspension & brakes · 4 weight · 3 induction · 1 engine · 1 tyres & wheels · 4 wording · 4 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • GT2 Tail lights on all GT category race cars. #32799suspension & brakes
  • GT2 Addendum to letter #32514 Ginetta GTA G56 #33076cars added
  • GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682wording
  • GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698other
  • GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805cars added
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • SRF3 SRF Tire Rule Update #32614tyres & wheels
  • SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes
  • GT2 Typo in rules for shocks #32308suspension & brakes
  • GT2 additional response to letters #31898 & 32083 #32424weight +140 lbs
  • GT2 Request to Classify Ginetta G40 in GT2 #31597cars added
  • GT2 2021 Supra GR GT4 #31737cars added
  • GT2 Proposed Technical Bulletin #31900induction
  • GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991wording
  • AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295other
  • AS specification line consolidation and correction #31846wording
  • AS correction of SMG specification line #31847suspension & brakes
  • AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engine
  • GT2 Restrictor Clarification for 2015 Cayman #31451induction
  • SRF3 Three Updates to SRF Rules #31523weight
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
  • GT2 Turbo Request for 13B Engine #30656induction
  • GT2 Request car classification #31032cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:39.665Andrew Aquilante · fastest of 22 · top 5 within 1.8s-0.254s (-0.25%)2:03.513Tim Kezman · fastest of 18 · top 5 within 9.6s+22.537s (+22.32%)163.7Jonathan Start1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)153.8James Jost-12.907squal +10.762s89.6%qual 110.8%1:49.520Franklin Futrelle · fastest of 84 · top 5 within 0.5s-0.304s (-0.28%)1:50.095John Black · fastest of 82 · top 5 within 0.2s+0.313s (+0.29%)132.1Matthew Horst-13.418squal +9.855s89.1%qual 109.9%
36 rule changes (GT2: 16, AS: 14, SRF3: 6)13 weight · 10 engine · 5 cars added · 2 tyres & wheels · 1 suspension & brakes · 3 wording · 2 othershowhide
  • GT2 Correct letter 30565 GT2/ST #31088weight
  • GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339cars added
  • GT2 Request to Update GTA Obsolete Part Numbers #30615wording
  • GT2 GTX class correction to GT2/ST #30973cars added
  • SRF3 SRF Wet Tires #30849tyres & wheels
  • SRF3 SADEV-SRF3 Transmission #30926other
  • SRF3 SRF Update Maintenance, Repairs and Seals #30961engine
  • GT2 Porsche Cayman Engine Modification and Engine Request #30472engine
  • GT2 Request weight clarification Viper CC #30565weight
  • GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641weight
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428cars added
  • AS American Sedan Transmission Rule Change Request #30595weight
  • AS Correction to specifications inadvertently deleted #30691wording
  • AS weight adjustments #30700weight +50 lbs
  • SRF3 SRF3 Alternator Pulley #30684weight
  • GT2 GT2 tiger firing order #30421engine
  • AS AS Mustang LP 4.6 3V Classification Transmission Request #29886weight
  • AS Request CF driveshaft on CTS-V for durability improvement #30117engine
  • AS Adjustment to model years of 5th generation RP Camaro #30348engine
  • GT2 GT2-ST CORVETTE CHANGES #30029weight +100 lbs
  • GT2 Request underfloor clarification #30121tyres & wheels
  • GT2 29742 Change new wording to read as: #30329engine
  • SRF3 Mandatory identification: #30223engine
  • GT2 ABS Restrictions #30064other
  • GT2 RM 21-01 C6 & C7 clarification #30192weight
  • AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars added
  • AS Request Trunk lid / Rear Hatch clarification #29591wording
  • AS Common Weight for CTS-V Tire #29759weight
  • AS Correction to specifications inadvertently deleted #30041cars added
  • GT2 Request change to engine firing order rule #29742engine
  • GT2 Request E-46 BMW M3 balance of performance #29833weight -100 lbs
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
  • GT2 Request for Bigger Engine in Plymouth Breeze #29380engine
  • SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
Road America Runoffs 20202020-10-022:12.298Andrew Aquilante · fastest of 20 · top 5 within 2.9s2:14.279Andrew Aquilante · fastest of 19 · top 5 within 2.4s162.2Scotty B White2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton+13.389squal +14.747s110.0%qual 111.1%2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s131.9Charles Russell Turner+16.759squal +17.488s112.5%qual 113.2%
49 rule changes (GT2: 26, AS: 16, SRF3: 7)10 weight · 6 engine · 6 induction · 6 suspension & brakes · 5 aero · 4 cars added · 3 tyres & wheels · 2 wording · 7 othershowhide
  • GT2 rescind GT2 stock car bodies removal #29219other
  • GT2 E&O Typos in Appendix L #29447wording
  • GT2 GT2 wing width wording correction #29469aero
  • GT2 GT Category Wording #29193induction
  • GT2 Corvette GT2-ST intake manifold #29221induction
  • GT2 997.2 E&O link to 27915 #29373other
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • GT2 Request for allowance Trans Am SGT #28951weight
  • GT2 Omitted GT2 fender/hood openings #29171other
  • AS Support for R-Type Specification Tires #27450tyres & wheels
  • AS Spec Tire Request #27519tyres & wheels
  • AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675induction
  • AS 2005-2009 Restricted Prep 4.6 3V #27908engine
  • AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engine
  • AS Request for Full Preparation Classification for 2010-2014 Camaro #28030other
  • AS Cylinder Heads #28696engine
  • AS Request for Max Rotor Diameter Change #28748suspension & brakes
  • AS Request increase rotor diameter #28797other
  • GT2 TA2 Gurney flap wicker clarification #28874aero
  • GT2 STO Gurney flap wicker clarification #28883aero
  • GT2 GT Gurney flap wicker clarification #28909aero
  • GT2 Request to Adjust Weight of OEM 8.4 Viper #28739weight -50 lbs
  • GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896weight -50 lbs
  • SRF3 SRF Shocks #28791suspension & brakes
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • GT2 Request Corvette engine parity #28576engine
  • SRF3 Update Bump Stop Rule #28712suspension & brakes
  • SRF3 SRF Bump Stop Correction #27019suspension & brakes
  • GT2 Request to revisit Panoz GT-S BoP #28280engine
  • GT2 GT2-ST Corvette LS2 & L76 #28583weight
  • GT2 GT2-ST Corvette L76 #28584weight
  • GT2 Request 991.2 Porsche engine displacement verify typo #28194engine
  • AS Rear Trailing Arms #28007suspension & brakes
  • AS Weight reduction for cars running iron heads #28010weight
  • AS 05-10 Mustang with HR cam classification #28226cars added
  • AS 10-15 Camaro Full Prep classification #28227cars added
  • GT2 Windshield Clips #27323other
  • GT2 Request to Add Chevrolet SS Body to Appendix L #27898wording
  • GT2 Request Factory Five Daytona coupe classification #26308cars added
  • GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701cars added
  • GT2 Request for Acura NSX Spec Line Changes #27755weight
  • GT2 GT2 991.1 restrictor size change #27914induction
  • GT2 GT2 996/997.1 weight change #27915weight -100 lbs
  • GT2 GT2/ST Corvette comp adjustment #27920induction
  • SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • SRF3 SRF Tire Warmer Rule #27622tyres & wheels
  • SRF3 SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF3 SRF / SRF3 Majors & Regional Class Updates #27723other
Virginia International Raceway Runoffs 20192019-10-051:50.182Andrew Aquilante · fastest of 24 · top 5 within 4.5s1:52.475Andrew Aquilante · fastest of 19 · top 5 within 3.3s162.8Tom Patton2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost+11.425squal +12.756s110.2%qual 111.6%2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s132.4Bobby Sak+12.280squal +14.442s110.9%qual 113.1%
28 rule changes (GT2: 21, AS: 4, SRF3: 3)8 cars added · 8 weight · 4 engine · 3 suspension & brakes · 1 wording · 4 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • AS Request Ride Height Clarification #26598suspension & brakes
  • GT2 TA2 Weight Clarification #27077weight
  • SRF3 SRF Dash Windscreen Kit #27028other
  • AS Request to Revert to 2017 Weights #25885weight
  • GT2 Request to classify Toyota Supra with 3SGTE engine #25185cars added
  • GT2 Request to Classify Acura NSX from T1 to GT2? #26121cars added
  • GT2 Request for TA2 BOP in GT2 #26509weight
  • SRF3 New SRF Sectional Nose Rule Addition #26914other
  • GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106engine
  • GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine
  • GT2 Request to Classify Ligier JS2 R #26535cars added
  • SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes
  • GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159engine
  • GT2 Request Ride Height Clarification #26600suspension & brakes
  • GT2 Request Porsche Cayman year classification #26241other
  • GT2 GT2/ST Porsche Cayman engine #26250engine
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • GT2 ST/GT2 BMW Flossman Kit Clarification #22138wording
  • GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110weight
  • GT2 Request to classify BMW E82 (1 series) into GT2 #25539cars added
  • GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545weight
  • GT2 Request - Classify Ford Performance 5.2l #25716cars added
  • GT2 Add missing displacement, minimum weight. Remove #25765weight
  • GT2 Request for Ford FP 350s Weight Reduction #25806weight
  • GT2 Request to Classify EcoBoost Mustang #25842cars added
  • GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024weight
  • GT2 GTX Homologation table update #26034cars added
Sonoma Raceway Runoffs 20182018-10-101:37.203Andrew Aquilante · fastest of 22 · top 5 within 2.1s1:38.524R Spencer Trenery · fastest of 19 · top 5 within 1.3s133.8Michael McAleenan1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi+11.821squal +10.579s112.0%qual 110.9%1:46.117Robeson Clay Russell · fastest of 36 · top 5 within 0.5s1:47.053TJ Acker · fastest of 35 · top 5 within 0.2s110.2Steve Fogg+8.529squal +8.914s108.7%qual 109.2%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:39.919Andrew Aquilante · fastest of 36 · top 5 within 2.9s1:40.976Andrew Aquilante · fastest of 35 · top 5 within 2.6s1:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s+10.531squal +5.301s110.4%qual 105.3%1:49.824John Black · fastest of 101 · top 5 within 0.5s1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s+8.806squal +9.905s108.7%qual 109.9%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:25.405Andrew Aquilante · fastest of 21 · top 5 within 2.8s1:26.847Andrew Aquilante · fastest of 19 · top 5 within 1.5s1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s+6.577squal +5.246s107.6%qual 106.1%1:34.363John Black · fastest of 41 · top 5 within 0.5s1:34.947Cliff White · fastest of 39 · top 5 within 0.3s+8.100squal +8.958s109.3%qual 110.5%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:53.652Jordan Bupp · fastest of 27 · top 5 within 1.2s1:53.543Jordan Bupp · fastest of 22 · top 5 within 1.7s2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s+9.379squal +8.094s108.3%qual 107.1%2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s+16.672squal +14.905s114.7%qual 113.1%

By track

TrackEvents Typical % of GT2 Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%Runoffs 2018
About this data
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of GT2's best on the same day: the weather and the day cancel out, so one figure compares across years where lap times cannot; a class that suits one track more than another still reads differently there. It still moves when the yardstick's own balance changes or its field thins, and an event the yardstick did not run has no point. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.