BoP Labbeta

BoP Lab / Classes / T1

T1 vs FE2 vs AS vs FV pace at every track

Lap times across years say as much about the weather as the class. % of T1 is each class's best lap as a share of T1'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: remove one to add another)
vsAS×B-SpecEPFAFCvsFE2×FFFPvsFV×FXGT1GT2GTXHPPP2SMSMXSRF3STLSTUT1×T2T3T4Show 51 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: T1 100.0% of T1 Andrew Aquilante, Daytona International Speedway Runoffs 2015 race · FE2 83.4% of T1 Liam Snyder, Virginia International Raceway Runoffs 2019 race · AS 91.6% of T1 Gregory Eaton, Virginia International Raceway Runoffs 2022 race · FV 101.5% of T1 Andrew Whitston, Virginia International Raceway Runoffs 2022 race

1:402:002:202:4029 rule changes between Runoffs 2018 and Runoffs 201929 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾32 rule changes between Runoffs 2020 and Runoffs 202132 ▾24 rule changes between Runoffs 2021 and Runoffs 202224 ▾23 rule changes between Runoffs 2022 and Runoffs 202323 ▾26 rule changes between Runoffs 2023 and Runoffs 202426 ▾31 rule changes between Runoffs 2024 and Runoffs 202531 ▾26 rule changes between Runoffs 2025 and Runoffs 202626 ▾T1 race best at Runoffs 2015: 1:55.494 (Andrew Aquilante)T1 race best at Runoffs 2016: 1:29.309 (Ross Murray)T1 race best at Runoffs 2017: 1:42.871 (Andrew Aquilante)T1 race best at Runoffs 2018: 1:41.125 (Kristofer Olson)T1 race best at Runoffs 2019: 2:14.413 (Andrew Aquilante)T1 race best at Runoffs 2020: 2:18.701 (Mark Boden)T1 race best at Runoffs 2021: 1:43.752 (Mark Boden)T1 race best at Runoffs 2022: 2:16.067 (Andrew Aquilante)T1 race best at Runoffs 2023: 1:55.488 (Andrew Aquilante)T1 race best at Runoffs 2024: 2:16.131 (Andrew Aquilante)T1 race best at Runoffs 2025: 2:21.612 (Drew Delmonico)T1 qualifying best at Runoffs 2015: 1:53.562 (Andrew Aquilante)T1 qualifying best at Runoffs 2016: 1:28.656 (Ross Murray)T1 qualifying best at Runoffs 2017: 1:41.793 (Andrew Aquilante)T1 qualifying best at Runoffs 2018: 1:39.970 (Kristofer Olson)T1 qualifying best at Runoffs 2019: 1:54.771 (Andrew Aquilante)T1 qualifying best at Runoffs 2020: 2:17.646 (Andrew Aquilante)T1 qualifying best at Runoffs 2021: 1:42.292 (Andrew Aquilante)T1 qualifying best at Runoffs 2022: 1:54.890 (Andrew Aquilante)T1 qualifying best at Runoffs 2023: 1:54.520 (Andrew Aquilante)T1 qualifying best at Runoffs 2024: 2:16.578 (Andrew Aquilante)T1 qualifying best at Runoffs 2025: 2:20.677 (James Candelaria)FE2 race best at Runoffs 2018: 1:35.563 (Flinn Lazier)FE2 race best at Runoffs 2019: 1:52.154 (Liam Snyder)FE2 race best at Runoffs 2020: 2:13.271 (Owen McAllister)FE2 race best at Runoffs 2021: 1:36.655 (Max Grau)FE2 race best at Runoffs 2022: 2:12.045 (Jason Conzo)FE2 race best at Runoffs 2023: 1:51.098 (Franklin Futrelle)FE2 race best at Runoffs 2024: 2:12.748 (Porter Aiken)FE2 race best at Runoffs 2025: 2:13.339 (Franklin Futrelle)FE2 race best at Runoffs 2026: 2:11.881 (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 1:35.040 (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 1:51.062 (Liam Snyder)FE2 qualifying best at Runoffs 2020: 2:12.806 (Scott Rettich)FE2 qualifying best at Runoffs 2021: 1:36.395 (Max Grau)FE2 qualifying best at Runoffs 2022: 1:50.853 (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 1:50.665 (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 2:11.506 (Porter Aiken)FE2 qualifying best at Runoffs 2025: 2:12.475 (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 2:12.326 (Franklin Futrelle)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)FV race best at Runoffs 2015: 2:21.142 (Andrew Whitston)FV race best at Runoffs 2016: 1:38.066 (Flinn Lazier)FV race best at Runoffs 2017: 1:55.923 (Michael Varacins)FV race best at Runoffs 2018: 1:53.639 (Alex Scaler)FV race best at Runoffs 2019: 2:18.289 (Zachary Whitston)FV race best at Runoffs 2020: 2:45.816 (Alex Scaler)FV race best at Runoffs 2021: 1:57.234 (Alex Scaler)FV race best at Runoffs 2022: 2:18.093 (Andrew Whitston)FV race best at Runoffs 2023: 2:16.611 (Andrew Abbott)FV race best at Runoffs 2024: 2:44.834 (Andrew Abbott)FV race best at Runoffs 2025: 2:46.736 (Zachary Whitston)FV race best at Runoffs 2026: 2:45.272 (Brian Farnham)FV qualifying best at Runoffs 2015: 2:21.167 (Roger Siebenaler)FV qualifying best at Runoffs 2016: 1:37.942 (Alex Scaler)FV qualifying best at Runoffs 2017: 1:55.759 (Michael Varacins)FV qualifying best at Runoffs 2018: 1:52.637 (Skip Streets)FV qualifying best at Runoffs 2019: 2:15.712 (Andrew Whitston)FV qualifying best at Runoffs 2020: 2:43.994 (Hunter Phelps-Barron)FV qualifying best at Runoffs 2021: 1:57.479 (Andrew Whitston)FV qualifying best at Runoffs 2022: 2:15.116 (Brian Farnham)FV qualifying best at Runoffs 2023: 2:15.639 (Andrew Whitston)FV qualifying best at Runoffs 2024: 2:42.643 (Andrew Whitston)FV qualifying best at Runoffs 2025: 2:44.101 (Andrew Abbott)FV qualifying best at Runoffs 2026: 2:46.536 (Zachary Whitston)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
T1FE2ASFVsolid race · dashed qualifying · slower is lower
90%100%110%120%29 rule changes between Runoffs 2018 and Runoffs 201929 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾32 rule changes between Runoffs 2020 and Runoffs 202132 ▾24 rule changes between Runoffs 2021 and Runoffs 202224 ▾23 rule changes between Runoffs 2022 and Runoffs 202323 ▾26 rule changes between Runoffs 2023 and Runoffs 202426 ▾31 rule changes between Runoffs 2024 and Runoffs 202531 ▾26 rule changes between Runoffs 2025 and Runoffs 202626 ▾T1 race best at Runoffs 2015: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2016: 100.0% of T1's (Ross Murray)T1 race best at Runoffs 2017: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2018: 100.0% of T1's (Kristofer Olson)T1 race best at Runoffs 2019: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2020: 100.0% of T1's (Mark Boden)T1 race best at Runoffs 2021: 100.0% of T1's (Mark Boden)T1 race best at Runoffs 2022: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2023: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2024: 100.0% of T1's (Andrew Aquilante)T1 race best at Runoffs 2025: 100.0% of T1's (Drew Delmonico)T1 qualifying best at Runoffs 2015: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2016: 100.0% of T1's (Ross Murray)T1 qualifying best at Runoffs 2017: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2018: 100.0% of T1's (Kristofer Olson)T1 qualifying best at Runoffs 2019: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2020: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2021: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2022: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2023: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2024: 100.0% of T1's (Andrew Aquilante)T1 qualifying best at Runoffs 2025: 100.0% of T1's (James Candelaria)FE2 race best at Runoffs 2018: 94.5% of T1's (Flinn Lazier)Off the chart: FE2 race best at Runoffs 2019: 83.4% of T1's (Liam Snyder)FE2 race best at Runoffs 2020: 96.1% of T1's (Owen McAllister)FE2 race best at Runoffs 2021: 93.2% of T1's (Max Grau)FE2 race best at Runoffs 2022: 97.0% of T1's (Jason Conzo)FE2 race best at Runoffs 2023: 96.2% of T1's (Franklin Futrelle)FE2 race best at Runoffs 2024: 97.5% of T1's (Porter Aiken)FE2 race best at Runoffs 2025: 94.2% of T1's (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 95.1% of T1's (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 96.8% of T1's (Liam Snyder)FE2 qualifying best at Runoffs 2020: 96.5% of T1's (Scott Rettich)FE2 qualifying best at Runoffs 2021: 94.2% of T1's (Max Grau)FE2 qualifying best at Runoffs 2022: 96.5% of T1's (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 96.6% of T1's (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 96.3% of T1's (Porter Aiken)FE2 qualifying best at Runoffs 2025: 94.2% of T1's (Franklin Futrelle)AS race best at Runoffs 2015: 106.4% of T1's (Andy McDermid)AS race best at Runoffs 2016: 104.6% of T1's (Edward Hosni)AS race best at Runoffs 2017: 108.4% of T1's (Bryan Long)AS race best at Runoffs 2018: 109.1% of T1's (John Heinricy)AS race best at Runoffs 2019: 92.2% of T1's (James Jost)AS race best at Runoffs 2020: 106.5% of T1's (Gregory Eaton)AS race best at Runoffs 2021: 106.6% of T1's (Gregory Eaton)AS race best at Runoffs 2022: 91.6% of T1's (Gregory Eaton)AS race best at Runoffs 2023: 107.5% of T1's (Gregory Eaton)AS race best at Runoffs 2024: 107.6% of T1's (Gregory Eaton)AS race best at Runoffs 2025: 105.4% of T1's (Gregory Eaton)AS qualifying best at Runoffs 2015: 107.2% of T1's (Tom Sloe)AS qualifying best at Runoffs 2016: 102.3% of T1's (Tom Sloe)AS qualifying best at Runoffs 2017: 103.4% of T1's (James Jost)AS qualifying best at Runoffs 2018: 107.8% of T1's (Andrew McDermid)AS qualifying best at Runoffs 2019: 107.1% of T1's (Gregory Eaton)AS qualifying best at Runoffs 2020: 106.8% of T1's (Gregory Eaton)AS qualifying best at Runoffs 2021: 108.0% of T1's (Drew Cattell)AS qualifying best at Runoffs 2022: 106.3% of T1's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 107.5% of T1's (Daniel Richardson)AS qualifying best at Runoffs 2024: 107.3% of T1's (Gregory Eaton)AS qualifying best at Runoffs 2025: 104.3% of T1's (Andrew McDermid)FV race best at Runoffs 2015: 122.2% of T1's (Andrew Whitston)FV race best at Runoffs 2016: 109.8% of T1's (Flinn Lazier)FV race best at Runoffs 2017: 112.7% of T1's (Michael Varacins)FV race best at Runoffs 2018: 112.4% of T1's (Alex Scaler)FV race best at Runoffs 2019: 102.9% of T1's (Zachary Whitston)FV race best at Runoffs 2020: 119.5% of T1's (Alex Scaler)FV race best at Runoffs 2021: 113.0% of T1's (Alex Scaler)FV race best at Runoffs 2022: 101.5% of T1's (Andrew Whitston)FV race best at Runoffs 2023: 118.3% of T1's (Andrew Abbott)FV race best at Runoffs 2024: 121.1% of T1's (Andrew Abbott)FV race best at Runoffs 2025: 117.7% of T1's (Zachary Whitston)FV qualifying best at Runoffs 2015: 124.3% of T1's (Roger Siebenaler)FV qualifying best at Runoffs 2016: 110.5% of T1's (Alex Scaler)FV qualifying best at Runoffs 2017: 113.7% of T1's (Michael Varacins)FV qualifying best at Runoffs 2018: 112.7% of T1's (Skip Streets)FV qualifying best at Runoffs 2019: 118.2% of T1's (Andrew Whitston)FV qualifying best at Runoffs 2020: 119.1% of T1's (Hunter Phelps-Barron)FV qualifying best at Runoffs 2021: 114.8% of T1's (Andrew Whitston)FV qualifying best at Runoffs 2022: 117.6% of T1's (Brian Farnham)FV qualifying best at Runoffs 2023: 118.4% of T1's (Andrew Whitston)FV qualifying best at Runoffs 2024: 119.1% of T1's (Andrew Whitston)FV qualifying best at Runoffs 2025: 116.7% of T1's (Andrew Abbott)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
T1FE2ASFVsolid race · dashed qualifying · each class's best lap as a share of T1's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventT1FE2ASFV
Qual best Race best Trap Qual best Race best Trap vs T1 % of T1 Qual best Race best Trap vs T1 % of T1 Qual best Race best Trap vs T1 % of T1 
Road America Runoffs 20262026-09-282:12.326Franklin Futrelle · fastest of 8 · top 5 within 1.9s-0.149s (-0.11%)2:11.881Franklin Futrelle · fastest of 8 · top 5 within 1.6s-1.458s (-1.09%)143.5Steve Whitston-5.5 mph (-3.7%)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%)2:46.536Zachary Whitston · fastest of 37 · top 5 within 1.7s+2.435s (+1.48%)2:45.272Brian Farnham · fastest of 34 · top 5 within 1.3s-1.464s (-0.88%)117.4Rick Shields+0.2 mph (+0.1%)
26 rule changes (T1: 12, FE2: 1, AS: 13)8 weight · 4 induction · 4 tyres & wheels · 3 engine · 2 removed · 5 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
  • T1 Tire Equality #40342tyres & wheels
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • T1 Trunk Lid Wording #40177tyres & wheels
  • T1 Clarification on Request #39716 T1 (Spec Line #1139) #39924induction
  • T1 Mistake in Line 1430 #39958other
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • T1 Spec line #1139 Restrictor Change Request #39922induction
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • T1 Replace OEM Heat Exchanger (Intercooler) With Aftermarket #39542other
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • T1 LS1 into Corvette C6 Spec Line Request #39716weight
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • T1 additional T1 adjustment #39520induction
  • AS 1994 Mustang Spec Line Request #39104engine
  • T1 Keep S2000 Classification #39344other
  • T1 Correcting and updating T1 GT4 spec lines #39394weight
  • T1 BOP adjustments to non GT4 T1 cars #39406weight +100 lbs
  • T1 Remove T1 Spec Line #39407removed
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
  • FE2 FE & FE2 Bubble Tail #38978other
Road America Runoffs 20252025-09-292:20.677James Candelaria · fastest of 5 · top 5 within 5.9s+4.099s (+3.00%)2:21.612Drew Delmonico · fastest of 5 · top 5 within 11.8s+5.481s (+4.03%)163.6Drew Delmonico+5.7 mph (+3.6%)2:12.475Franklin Futrelle · fastest of 11 · top 5 within 1.4s+0.969s (+0.74%)2:13.339Franklin Futrelle · fastest of 10 · top 5 within 0.6s+0.591s (+0.45%)149.0Steve Whitston+3.7 mph (+2.6%)-8.273squal -8.202s94.2%qual 94.2%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%)+7.620squal +6.115s105.4%qual 104.3%2:44.101Andrew Abbott · fastest of 34 · top 5 within 1.3s+1.458s (+0.90%)2:46.736Zachary Whitston · fastest of 29 · top 5 within 0.6s+1.902s (+1.15%)117.2Zachary Whitston+0.7 mph (+0.6%)+25.124squal +23.424s117.7%qual 116.7%
31 rule changes (T1: 19, FE2: 1, AS: 11)10 weight · 8 engine · 4 cars added · 3 induction · 3 tyres & wheels · 3 othershowhide
  • 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
  • T1 Acceptance of Porsche 981 GT4 Clubsport into T1 #36664cars added
  • T1 Request to Restore T1 Honda S2000 to Proper Weights #37644weight -50 lbs
  • T1 DCT Transmission in E46 #37964other
  • T1 Reduce E92 M3 Minimum Weight to 3050 #38092weight
  • T1 Finalize Spec Line for T1 Darkhorse #38106weight
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • FE2 Driver Safety & Comfort #37965other
  • T1 Cadillac CT4-V Blackwing #38003cars added
  • AS Race memo #37902engine
  • T1 Correct and make new T1 BOP adjustments. #37737weight +75 lbs
  • T1 T1 Parity Compared to GT4 #37170weight +125 lbs
  • T1 Clarification of Request Approval #37273 #37399engine
  • T1 C8 Corvette Facts #37400weight -100 lbs
  • T1 Camaro Gen 5 Competitive Disadvantage #37440induction
  • T1 Tire Changes in the Rules for GT4 #37497tyres & wheels
  • 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
  • T1 Changes to T1 Tires for GT4 and Other Cars #35383tyres & wheels
  • T1 G82 M4 GT4 inclusion in T1 #35864cars added
  • T1 Alt. Clutch Allowance #36606engine
  • T1 BOP Changes Need Updates #36667weight -150 lbs
  • T1 Request Ford Performance Darkhorse R in T1 #37136cars added
  • T1 Car Mods for T1 Corvette under line item 1150 #37173tyres & wheels
  • T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine #37273engine
Road America Runoffs 20242024-10-012:16.578Andrew Aquilante · fastest of 8 · top 5 within 4.8s-1.068s (-0.78%)2:16.131Andrew Aquilante · fastest of 7 · top 5 within 4.0s-2.570s (-1.85%)157.9Andrew Aquilante-0.8 mph (-0.5%)2:11.506Porter Aiken · fastest of 18 · top 5 within 0.5s-1.300s (-0.98%)2:12.748Porter Aiken · fastest of 17 · top 5 within 2.0s-0.523s (-0.39%)145.3Porter Aiken+1.9 mph (+1.3%)-3.383squal -5.072s97.5%qual 96.3%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%)+10.298squal +10.000s107.6%qual 107.3%2:42.643Andrew Whitston · fastest of 27 · top 5 within 2.3s-1.351s (-0.82%)2:44.834Andrew Abbott · fastest of 27 · top 5 within 0.9s-0.982s (-0.59%)116.5Brian Farnham-0.7 mph (-0.6%)+28.703squal +26.065s121.1%qual 119.1%
26 rule changes (T1: 13, AS: 11, FV: 2)12 cars added · 2 engine · 2 induction · 2 tyres & wheels · 2 weight · 1 suspension & brakes · 5 othershowhide
  • FV Disc Brakes #36822suspension & brakes
  • AS Mustang transmission ratios #36662engine
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • 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
  • T1 Please Expedite classing the C63 Mercedes #35987cars added
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • T1 Honda S2000 #35582cars added
  • 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
  • T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023 #35411cars added
  • T1 C8 Corvette T1 Restrictor Plate Request #35213induction
  • T1 The Cars Have Expired #35379induction
  • T1 GT4 batch adjustment in T1 #35162weight -85 lbs
  • T1 Remove T1 spec lines #35192other
  • FV FV Wheel Bearing Clarification #35150tyres & wheels
  • T1 New T1 add spec line for C5 corvette LS2 engines (Copy from C6) #33764engine
  • T1 C7 Corvette Rule Change Request #34897cars added
  • T1 Camaro Gen 5 Weight Reduction Due to Competitive Disadvantage #35092weight -75 lbs
  • T1 Addendum to Letter #35022: Drivetrain Rule #35105other
  • T1 2004 - 2006 Pontiac GTO Re-Integration Back Into T1 #34403cars added
  • T1 Request to Classify Porsche 997-1 GT3 Cup #34561cars added
Virginia International Raceway Runoffs 20232023-09-231:54.520Andrew Aquilante · fastest of 12 · top 5 within 3.7s-0.370s (-0.32%)1:55.488Andrew Aquilante · fastest of 12 · top 5 within 2.7s-20.579s (-15.12%)159.2James Candelaria+1.6 mph (+1.0%)1:50.665Charles Russell Turner · fastest of 26 · top 5 within 2.3s-0.188s (-0.17%)1:51.098Franklin Futrelle · fastest of 19 · top 5 within 1.4s-20.947s (-15.86%)141.3Franklin Futrelle-0.6 mph (-0.4%)-4.390squal -3.855s96.2%qual 96.6%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%)+8.632squal +8.562s107.5%qual 107.5%2:15.639Andrew Whitston · fastest of 27 · top 5 within 1.4s+0.523s (+0.39%)2:16.611Andrew Abbott · fastest of 23 · top 5 within 1.6s-1.482s (-1.07%)115.6Brian Farnham-0.2 mph (-0.2%)+21.123squal +21.119s118.3%qual 118.4%
23 rule changes (T1: 19, AS: 4)4 engine · 3 cars added · 3 tyres & wheels · 3 weight · 2 induction · 1 aero · 1 removed · 1 suspension & brakes · 2 wording · 3 othershowhide
  • 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
  • T1 Why no Camaro? #34421cars added
  • T1 Request to Remove Expiration from T1 spec lines #1350 & #1370 #34470other
  • T1 Remove #34475other
  • T1 Error in T1 GT4 numbering scheme- #34578wording
  • T1 C5 Approved Aero That Was Mistakenly Deleted #34374aero
  • T1 Viper Cleanup #34107induction
  • T1 Viper 8300 OEM FPR Size #34268induction
  • T1 Ford Mustang S197 (05-14) Clarification #34450wording
  • T1 Gen 5 Camaro Engine #33875engine
  • T1 Inquiry to letter #33682 #34071engine
  • T1 Request to reinstate T1 S197 Mustang #34048cars added
  • T1 T1 GT4 adjustments #33786other
  • T1 Touring 1 Tire Sizes #34191tyres & wheels
  • T1 Clarification for Camaro Gen5 2010-2015 #33739cars added
  • T1 Sequential Gearbox Limitations in T1 #33691weight
  • T1 T1 GT4 adjustments #33786weight
  • T1 Sunset of pre 2023 Touring 1 Rules. #33916removed
  • T1 Corrections to T1 Spec Lines #33678tyres & wheels
  • T1 GT4 section to Current T1 Rules. #33632weight
Virginia International Raceway Runoffs 20222022-09-241:54.890Andrew Aquilante · fastest of 10 · top 5 within 3.2s+0.119s (+0.10%)2:16.067Andrew Aquilante · fastest of 8 · top 5 within 15.9s+1.654s (+1.23%)157.5Mark Boden+1.3 mph (+0.8%)1:50.853Charles Russell Turner · fastest of 25 · top 5 within 1.1s-0.209s (-0.19%)2:12.045Jason Conzo · fastest of 22 · top 5 within 1.8s+19.891s (+17.74%)141.9Eric Cruz-0.6 mph (-0.5%)-4.022squal -4.037s97.0%qual 96.5%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%)-11.489squal +7.272s91.6%qual 106.3%2:15.116Brian Farnham · fastest of 29 · top 5 within 1.1s-0.596s (-0.44%)2:18.093Andrew Whitston · fastest of 28 · top 5 within 1.2s-0.196s (-0.14%)115.8Jonathan Weisheit+1.1 mph (+0.9%)+2.026squal +20.226s101.5%qual 117.6%
24 rule changes (T1: 11, AS: 9, FV: 4)11 weight · 2 cars added · 2 suspension & brakes · 1 engine · 1 induction · 3 wording · 4 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs #32824weight -25 lbs
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • T1 Fix FP350S limited prep and Shelby 350 full prep issues #31680induction
  • T1 Request to Classify AMG GT4 #32610cars added
  • T1 Viper/Z06 Parity #31942weight -50 lbs
  • T1 Discrepancy in T1 allowances #32293other
  • T1 T1 RX7 classification #32352cars added
  • FV Connecting Rod Update Request for 9.1.1.C Formula Vee (FV) 5.C.6 #32160weight
  • FV E&O clarification of connecting rod center-to-center length #32183weight
  • T1 Weight reduction E&O #30791weight -25 lbs
  • T1 Performance Adjustment Request for Camaro #31521weight -50 lbs
  • T1 Remove 33m Brake rotor thickness rule #31954suspension & brakes
  • 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
  • FV Update direct replacement connecting rod information #31843weight
  • FV Formula V Connecting Rod Replacement #31448weight
  • T1 Turbo Miata Help #31315weight +200 lbs
  • T1 Fix the T1 Corvette heading #31528wording
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
Indianapolis Motor Speedway Runoffs 20212021-09-251:42.292Andrew Aquilante · fastest of 22 · top 5 within 1.3s+0.499s (+0.49%)1:43.752Mark Boden · fastest of 22 · top 5 within 1.0s+0.881s (+0.86%)159.2Mark Boden1:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler-7.097squal -5.897s93.2%qual 94.2%1:50.427Drew 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+6.854squal +8.135s106.6%qual 108.0%1:57.479Andrew Whitston · fastest of 48 · top 5 within 0.8s+1.720s (+1.49%)1:57.234Alex Scaler · fastest of 47 · top 5 within 1.0s+1.311s (+1.13%)124.0Mark Edwards+13.482squal +15.187s113.0%qual 114.8%
32 rule changes (T1: 18, AS: 14)9 weight · 7 cars added · 6 engine · 1 aero · 1 induction · 1 suspension & brakes · 3 wording · 4 othershowhide
  • T1 T1 E46 BOP E&O for Letter # 29970 #30934weight +100 lbs
  • T1 Request BoP for the Viper in 1 LP #29968other
  • T1 LS6 Alternative Head Question #30074engine
  • 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
  • T1 T1-LP - Add Performance Pack, Bullet, Mach 1 to 18+ Mustang #29849induction
  • T1 Request BoP for the Viper in 1 LP #29968other
  • T1 Request to classify C7 and 13Viper in T1 LP #29969cars added
  • T1 Request LP Z06 steel chassis #30589other
  • T1 Request For Reduction in Weight/Penalties for Camaro #30443weight
  • T1 Fix dry sump Contradictions in T1-LP vs T2 #30596suspension & brakes
  • 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
  • T1 T1 LP Aero adjustments #30196aero
  • T1 Request to Clarify Miller Mustang Classification #28728engine
  • T1 BMW E46 Carbon Dash #29806engine
  • T1 Request to Update T1 Mustang Spec Line #30001other
  • T1 Dodge Viper 8400 OEM??? #30174cars added
  • T1 Class BMW M2CS Club Sport #30195cars added
  • T1 997.1 GT3 Cup #30229cars added
  • 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
  • T1 Correct T1 Limited Prep Years #29708wording
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
  • T1 Changes to Corvette C8 #29898weight -100 lbs
Road America Runoffs 20202020-10-022:17.646Andrew Aquilante · fastest of 15 · top 5 within 3.7s2:18.701Mark Boden · fastest of 14 · top 5 within 3.0s158.8James Candelaria2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister-5.430squal -4.840s96.1%qual 96.5%2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton+8.967squal +9.399s106.5%qual 106.8%2:43.994Hunter Phelps-Barron · fastest of 28 · top 5 within 0.6s2:45.816Alex Scaler · fastest of 24 · top 5 within 1.5s117.1Hunter Phelps-Barron+27.115squal +26.348s119.5%qual 119.1%
37 rule changes (T1: 13, FE2: 2, AS: 16, FV: 6)9 tyres & wheels · 5 suspension & brakes · 5 weight · 4 aero · 4 engine · 3 cars added · 3 induction · 2 wording · 2 othershowhide
  • FE2 FE/FE2 Oil Cooler #29293wording
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • T1 Touring Gurney flap wicker clarification #29013aero
  • 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
  • FV Support for Recommended Item - 4 bolt wheels in FV #29084tyres & wheels
  • FV Support for 4-bolt pattern wheels #28955 #29118tyres & wheels
  • T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • T1 Additional Clarification on 996 Cup in T1 From Letter #28040 #28060wording
  • T1 Request SPEC Corvette Rear Spolier #28182aero
  • T1 T1 Rear Brake Rotor Size Exemption for Gen 5 Camaro #28402suspension & brakes
  • T1 Request 996 GT3 Trunk for Wing Allowance. #28153aero
  • T1 All Touring, Change DOT Tire Language 9.1.9.1, 9.3.45 #28452tyres & wheels
  • FV Update rain tire designation #28444tyres & wheels
  • T1 Request for E46 wagon with S54 engine in T1 #27427engine
  • 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
  • T1 Request to include Subaru WRX/STI 02-18 in T1 #24916induction
  • T1 Request Ford Mustang FP350S T1-LP weight and restrictor change #26662weight +100 lbs
  • T1 Request to classify Ford Coyote 3rd Gen OEM #27145cars added
  • T1 Request alternate dashboard #27276weight
  • T1 Request for Allowance of Coil Springs on Limited Prep C6 Corvette #27713suspension & brakes
  • FV FV Allow non-spec tire in Regional competition #26284tyres & wheels
  • FV Request to Allow Rear Tires on the Front of Formula Vee #26537tyres & wheels
  • FE2 FE / FE2 Update Rules #27624weight
  • FV Clarification on Wheel Bolt Pattern #27603tyres & wheels
Virginia International Raceway Runoffs 20192019-10-051:54.771Andrew Aquilante · fastest of 19 · top 5 within 3.1s2:14.413Andrew Aquilante · fastest of 15 · top 5 within 4.8s156.2Mark Boden1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman-22.259squal -3.709s83.4%qual 96.8%2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost-10.513squal +8.167s92.2%qual 107.1%2:15.712Andrew Whitston · fastest of 26 · top 5 within 1.5s2:18.289Zachary Whitston · fastest of 19 · top 5 within 0.4s114.8Roger Siebenaler+3.876squal +20.941s102.9%qual 118.2%
29 rule changes (T1: 19, AS: 4, FV: 6)7 cars added · 7 weight · 4 suspension & brakes · 2 induction · 2 tyres & wheels · 1 aero · 1 wording · 5 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • FV Allowed Modifications E&O #27398other
  • FV E&O Wheels #27230tyres & wheels
  • T1 T1 LP 2016 Camaro and Later #27198weight -100 lbs
  • AS Request Ride Height Clarification #26598suspension & brakes
  • T1 Request to return Ford Mustang Challenge Car to T1 #26751cars added
  • T1 Correct years in T1 FP Corvette spec #27023wording
  • T1 Request BoP Baten - T1 Camaro - Follow up to Letter # 26145 #26900induction
  • AS Request to Revert to 2017 Weights #25885weight
  • FV Exhaust termination rule E&O #26702other
  • T1 Clarify DOT tires touring #26556tyres & wheels
  • FV E&O Dimensions #26674other
  • T1 Request to Classify EcoBoost Mustang #25841cars added
  • T1 Request Corvette aerodynamic aids #26265aero
  • T1 Audi TTRS VTS Documentation Revision #26578other
  • T1 Request Ride Height Clarification #26599suspension & brakes
  • T1 Opposes Unfair weight and throttle restrictor #26719weight -300 lbs
  • FV Request to clarify Disc Brake rules bearing retainer & weights #26262suspension & brakes
  • T1 Request to classify the Porsche 928GTS/S4 in Touring 1 #26315cars added
  • T1 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • FV FV Intake Manifold Clarification #26008induction
  • T1 Class 2015+ Mustang GT350(R) #21466weight
  • T1 Request to Classify Ford FP350S in T1-LP #25341cars added
  • T1 Amendment to Request #25555 #25556suspension & brakes
  • T1 Request to balance 996 v 997 T1 weight #25658weight
  • T1 Request to Add PDK Transmission to 997 Porsche Spec Line #25668cars added
  • T1 T1 World Challenge/Grand AM Spec Cars #25687weight
  • T1 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
Sonoma Raceway Runoffs 20182018-10-101:39.970Kristofer Olson · fastest of 16 · top 5 within 3.8s1:41.125Kristofer Olson · fastest of 15 · top 5 within 3.0s108.6Brad McCall1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich-5.562squal -4.930s94.5%qual 95.1%1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi+9.220squal +7.812s109.1%qual 107.8%1:52.637Skip Streets · fastest of 29 · top 5 within 1.6s1:53.639Alex Scaler · fastest of 28 · top 5 within 0.4s106.3Skip Streets+12.514squal +12.667s112.4%qual 112.7%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:41.793Andrew Aquilante · fastest of 22 · top 5 within 2.9s1:42.871Andrew Aquilante · fastest of 21 · top 5 within 2.9s1:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s+8.636squal +3.427s108.4%qual 103.4%1:55.759Michael Varacins · fastest of 39 · top 5 within 1.0s1:55.923Michael Varacins · fastest of 32 · top 5 within 1.3s+13.052squal +13.966s112.7%qual 113.7%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:28.656Ross Murray · fastest of 17 · top 5 within 1.4s1:29.309Ross Murray · fastest of 15 · top 5 within 1.1s1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s+4.115squal +1.995s104.6%qual 102.3%1:37.942Alex Scaler · fastest of 41 · top 5 within 0.3s1:38.066Flinn Lazier · fastest of 38 · top 5 within 0.7s+8.757squal +9.286s109.8%qual 110.5%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:53.562Andrew Aquilante · fastest of 12 · top 5 within 2.5s1:55.494Andrew Aquilante · fastest of 12 · top 5 within 2.1s2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s+7.428squal +8.184s106.4%qual 107.2%2:21.167Roger Siebenaler · fastest of 31 · top 5 within 0.8s2:21.142Andrew Whitston · fastest of 30 · top 5 within 1.1s+25.648squal +27.605s122.2%qual 124.3%

By track

TrackEvents Typical % of T1 Best Latest 
Road America4100.0%3 of 4 with T1100.0%Runoffs 2020100.0%Runoffs 2025
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 T1'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.