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BoP Lab / Classes / T1

T1 vs SM vs P2 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)
ASB-SpecEPFAFCFE2FFFPvsFV×FXGT1GT2GTXHPPvsP2×vsSM×SMXSRF3STLSTUT1×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 · SM 101.5% of T1 Elivan Goulart, Virginia International Raceway Runoffs 2019 race · P2 82.0% of T1 Greg Gyann, Virginia International Raceway Runoffs 2019 race · FV 101.5% of T1 Andrew Whitston, Virginia International Raceway Runoffs 2022 race

1:201:402:002:202:4038 rule changes between Runoffs 2018 and Runoffs 201938 ▾27 rule changes between Runoffs 2019 and Runoffs 202027 ▾27 rule changes between Runoffs 2020 and Runoffs 202127 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾28 rule changes between Runoffs 2022 and Runoffs 202328 ▾24 rule changes between Runoffs 2023 and Runoffs 202424 ▾24 rule changes between Runoffs 2024 and Runoffs 202524 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾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)SM race best at Runoffs 2015: 2:24.067 (Todd Lamb)SM race best at Runoffs 2016: 1:40.764 (Michael Carter)SM race best at Runoffs 2017: 1:59.100 (Michael Gagliardo)SM race best at Runoffs 2018: 1:55.278 (Michael Carter)SM race best at Runoffs 2019: 2:16.459 (Elivan Goulart)SM race best at Runoffs 2020: 2:43.748 (Preston Pardus)SM race best at Runoffs 2021: 1:58.837 (Brian Henderson)SM race best at Runoffs 2022: 2:19.107 (Travis Wiley)SM race best at Runoffs 2023: 2:16.229 (Julian DaCosta)SM race best at Runoffs 2024: 2:41.486 (Brett Kowalski)SM race best at Runoffs 2025: 2:44.430 (Kyle Greenhill)SM race best at Runoffs 2026: 2:42.725 (Francisco Barroso)SM qualifying best at Runoffs 2015: 2:18.661 (Andrew Carbonell)SM qualifying best at Runoffs 2016: 1:40.514 (Justin Hille)SM qualifying best at Runoffs 2017: 1:58.306 (Chris Haldeman)SM qualifying best at Runoffs 2018: 1:54.355 (Ken Sutherland)SM qualifying best at Runoffs 2019: 2:14.552 (Todd Buras)SM qualifying best at Runoffs 2020: 2:42.209 (Kyle Greenhill)SM qualifying best at Runoffs 2021: 1:57.695 (Brian Henderson)SM qualifying best at Runoffs 2022: 2:14.664 (Danny Steyn)SM qualifying best at Runoffs 2023: 2:14.986 (Danny Steyn)SM qualifying best at Runoffs 2024: 2:41.106 (Ethan Goulart)SM qualifying best at Runoffs 2025: 2:43.111 (Bobby Gossett)SM qualifying best at Runoffs 2026: 2:42.173 (Brett Kowalski)P2 race best at Runoffs 2015: 1:52.355 (Jeff Shafer)P2 race best at Runoffs 2016: 1:20.904 (Jeff Shafer)P2 race best at Runoffs 2017: 1:32.481 (Jeff Shafer)P2 race best at Runoffs 2018: 1:32.071 (Chuck Bona)P2 race best at Runoffs 2019: 1:50.258 (Greg Gyann)P2 race best at Runoffs 2020: 2:09.793 (Robert Iversen)P2 race best at Runoffs 2021: 1:35.322 (Tim Day Jr)P2 race best at Runoffs 2022: 2:15.834 (Greg Gyann)P2 race best at Runoffs 2023: 1:48.829 (Lucian Pancea)P2 race best at Runoffs 2024: 2:08.322 (Bart Wolf)P2 race best at Runoffs 2026: 2:09.441 (Mike Reupert)P2 qualifying best at Runoffs 2015: 1:51.825 (Chris Farrell)P2 qualifying best at Runoffs 2016: 1:20.188 (Jeff Shafer)P2 qualifying best at Runoffs 2017: 1:31.826 (Jeff Shafer)P2 qualifying best at Runoffs 2018: 1:28.784 (Tim Day Jr)P2 qualifying best at Runoffs 2019: 1:49.111 (Robert Iversen)P2 qualifying best at Runoffs 2020: 2:08.514 (Robert Iversen)P2 qualifying best at Runoffs 2021: 1:33.235 (Tim Day Jr)P2 qualifying best at Runoffs 2022: 1:47.566 (Tim Day Jr)P2 qualifying best at Runoffs 2023: 1:48.590 (Greg Gyann)P2 qualifying best at Runoffs 2024: 2:07.405 (Bart Wolf)P2 qualifying best at Runoffs 2026: 2:10.606 (Greg Gyann)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
T1SMP2FVsolid race · dashed qualifying · slower is lower
90%100%110%120%38 rule changes between Runoffs 2018 and Runoffs 201938 ▾27 rule changes between Runoffs 2019 and Runoffs 202027 ▾27 rule changes between Runoffs 2020 and Runoffs 202127 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾28 rule changes between Runoffs 2022 and Runoffs 202328 ▾24 rule changes between Runoffs 2023 and Runoffs 202424 ▾24 rule changes between Runoffs 2024 and Runoffs 202524 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾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)SM race best at Runoffs 2015: 124.7% of T1's (Todd Lamb)SM race best at Runoffs 2016: 112.8% of T1's (Michael Carter)SM race best at Runoffs 2017: 115.8% of T1's (Michael Gagliardo)SM race best at Runoffs 2018: 114.0% of T1's (Michael Carter)SM race best at Runoffs 2019: 101.5% of T1's (Elivan Goulart)SM race best at Runoffs 2020: 118.1% of T1's (Preston Pardus)SM race best at Runoffs 2021: 114.5% of T1's (Brian Henderson)SM race best at Runoffs 2022: 102.2% of T1's (Travis Wiley)SM race best at Runoffs 2023: 118.0% of T1's (Julian DaCosta)SM race best at Runoffs 2024: 118.6% of T1's (Brett Kowalski)SM race best at Runoffs 2025: 116.1% of T1's (Kyle Greenhill)SM qualifying best at Runoffs 2015: 122.1% of T1's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 113.4% of T1's (Justin Hille)SM qualifying best at Runoffs 2017: 116.2% of T1's (Chris Haldeman)SM qualifying best at Runoffs 2018: 114.4% of T1's (Ken Sutherland)SM qualifying best at Runoffs 2019: 117.2% of T1's (Todd Buras)SM qualifying best at Runoffs 2020: 117.8% of T1's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 115.1% of T1's (Brian Henderson)SM qualifying best at Runoffs 2022: 117.2% of T1's (Danny Steyn)SM qualifying best at Runoffs 2023: 117.9% of T1's (Danny Steyn)SM qualifying best at Runoffs 2024: 118.0% of T1's (Ethan Goulart)SM qualifying best at Runoffs 2025: 115.9% of T1's (Bobby Gossett)P2 race best at Runoffs 2015: 97.3% of T1's (Jeff Shafer)P2 race best at Runoffs 2016: 90.6% of T1's (Jeff Shafer)P2 race best at Runoffs 2017: 89.9% of T1's (Jeff Shafer)P2 race best at Runoffs 2018: 91.0% of T1's (Chuck Bona)Off the chart: P2 race best at Runoffs 2019: 82.0% of T1's (Greg Gyann)P2 race best at Runoffs 2020: 93.6% of T1's (Robert Iversen)P2 race best at Runoffs 2021: 91.9% of T1's (Tim Day Jr)P2 race best at Runoffs 2022: 99.8% of T1's (Greg Gyann)P2 race best at Runoffs 2023: 94.2% of T1's (Lucian Pancea)P2 race best at Runoffs 2024: 94.3% of T1's (Bart Wolf)P2 qualifying best at Runoffs 2015: 98.5% of T1's (Chris Farrell)P2 qualifying best at Runoffs 2016: 90.4% of T1's (Jeff Shafer)P2 qualifying best at Runoffs 2017: 90.2% of T1's (Jeff Shafer)P2 qualifying best at Runoffs 2018: 88.8% of T1's (Tim Day Jr)P2 qualifying best at Runoffs 2019: 95.1% of T1's (Robert Iversen)P2 qualifying best at Runoffs 2020: 93.4% of T1's (Robert Iversen)P2 qualifying best at Runoffs 2021: 91.1% of T1's (Tim Day Jr)P2 qualifying best at Runoffs 2022: 93.6% of T1's (Tim Day Jr)P2 qualifying best at Runoffs 2023: 94.8% of T1's (Greg Gyann)P2 qualifying best at Runoffs 2024: 93.3% of T1's (Bart Wolf)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
T1SMP2FVsolid 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
EventT1SMP2FV
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 20262026-09-282:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)2:10.606Greg Gyann · fastest of 11 · top 5 within 5.3s+3.201s (+2.51%)2:09.441Mike Reupert · fastest of 11 · top 5 within 4.2s+1.119s (+0.87%)155.0Matt Strand+2.4 mph (+1.6%)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%)
14 rule changes (T1: 12, SM: 2)3 induction · 3 weight · 2 tyres & wheels · 1 removed · 1 wording · 4 othershowhide
  • SM Rear Toe Link #40271other
  • T1 Tire Equality #40342tyres & wheels
  • T1 Trunk Lid Wording #40177tyres & wheels
  • T1 Clarification on Request #39716 T1 (Spec Line #1139) #39924induction
  • T1 Mistake in Line 1430 #39958other
  • SM Part Number Change Request #39914wording
  • T1 Spec line #1139 Restrictor Change Request #39922induction
  • T1 Replace OEM Heat Exchanger (Intercooler) With Aftermarket #39542other
  • T1 LS1 into Corvette C6 Spec Line Request #39716weight
  • T1 additional T1 adjustment #39520induction
  • 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
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%)2:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)119.3Francisco Barroso-0.6 mph (-0.5%)+22.818squal +22.434s116.1%qual 115.9%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%
24 rule changes (T1: 19, SM: 4, P2: 1)8 weight · 4 cars added · 4 tyres & wheels · 3 engine · 1 induction · 1 wording · 3 othershowhide
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • 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
  • T1 Cadillac CT4-V Blackwing #38003cars added
  • 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
  • P2 2000 cc Pinto Engine Car Weight #37187weight
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • 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%)2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)119.9Alex Bertagnoli-1.4 mph (-1.2%)+25.355squal +24.528s118.6%qual 118.0%2:07.405Bart Wolf · fastest of 14 · top 5 within 3.0s-1.109s (-0.86%)2:08.322Bart Wolf · fastest of 13 · top 5 within 0.6s-1.471s (-1.13%)152.5Lucian Pancea-0.6 mph (-0.4%)-7.809squal -9.173s94.3%qual 93.3%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%
24 rule changes (T1: 13, SM: 4, P2: 5, FV: 2)6 cars added · 6 engine · 2 induction · 2 suspension & brakes · 2 tyres & wheels · 2 weight · 1 wording · 3 othershowhide
  • FV Disc Brakes #36822suspension & brakes
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • P2 CN Spec ECU #35835engine
  • P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels
  • T1 Please Expedite classing the C63 Mercedes #35987cars added
  • T1 Honda S2000 #35582cars 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
  • P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine
  • P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine
  • T1 GT4 batch adjustment in T1 #35162weight -85 lbs
  • T1 Remove T1 spec lines #35192other
  • FV FV Wheel Bearing Clarification #35150tyres & wheels
  • P2 Correct Table 1 for Engine Date Range Specifications #35182engine
  • 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%)2:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)120.3Jim Drago+1.1 mph (+0.9%)+20.741squal +20.466s118.0%qual 117.9%1:48.590Greg Gyann · fastest of 12 · top 5 within 1.7s+1.024s (+0.95%)1:48.829Lucian Pancea · fastest of 11 · top 5 within 0.9s-27.005s (-19.88%)150.9Lucian Pancea-0.2 mph (-0.2%)-6.659squal -5.930s94.2%qual 94.8%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%
28 rule changes (T1: 19, SM: 1, P2: 8)7 weight · 4 cars added · 4 engine · 3 tyres & wheels · 2 induction · 1 aero · 1 removed · 3 wording · 3 othershowhide
  • 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
  • P2 Clarify minimum side body height requirement #34143tyres & wheels
  • P2 Clarify closed cockpit single seat car allowance #34144wording
  • T1 T1 GT4 adjustments #33786other
  • T1 Touring 1 Tire Sizes #34191tyres & wheels
  • P2 Remove redundant effective date language and update engine table #34012engine
  • P2 E&O - Correct dimensional equivalents #34038weight
  • 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
  • P2 Request to Classify Sebeco NP01 #33378cars added
  • P2 Radical spec line clarifications #33485weight
  • P2 E&O original class intent #33519weight
  • P2 Update Engine Table Spec Line B.1 #33608engine
  • SM BOP for NB1 and NB2 #32309weight
  • 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%)2:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)119.2Jonathan Neudorf-0.6 mph (-0.5%)+3.040squal +19.774s102.2%qual 117.2%1:47.566Tim Day Jr · fastest of 12 · top 5 within 3.0s-1.545s (-1.42%)2:15.834Greg Gyann · fastest of 12 · top 5 within 10.1s+25.576s (+23.20%)151.1Robert Iversen+1.8 mph (+1.2%)-0.233squal -7.324s99.8%qual 93.6%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%
26 rule changes (T1: 11, SM: 1, P2: 10, FV: 4)10 weight · 3 tyres & wheels · 2 cars added · 2 engine · 2 suspension & brakes · 1 aero · 1 induction · 2 wording · 3 othershowhide
  • T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs #32824weight -25 lbs
  • T1 Fix FP350S limited prep and Shelby 350 full prep issues #31680induction
  • T1 Request to Classify AMG GT4 #32610cars added
  • P2 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels
  • P2 Clean up P2 wording #32525wording
  • P2 After Market to Aftermarket #32373other
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • 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
  • P2 Add spec line for Beasley B2 #32147weight
  • P2 E&O Table 1 spec line wing terminology #32148aero
  • P2 E&O class name #32196other
  • 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
  • P2 E&O Engine section #31969engine
  • FV Update direct replacement connecting rod information #31843weight
  • P2 E&O letter #31539 – Control Area definition #31783tyres & wheels
  • FV Formula V Connecting Rod Replacement #31448weight
  • P2 BoP adjustment effective 1-1-22 #31538engine
  • P2 E&O clarification of "Control Area" definition #31539tyres & wheels
  • T1 Turbo Miata Help #31315weight +200 lbs
  • T1 Fix the T1 Corvette heading #31528wording
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 Boden1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)119.8Kyle Greenhill+15.085squal +15.403s114.5%qual 115.1%1:33.235Tim Day Jr · fastest of 16 · top 5 within 3.3s+1.409s (+1.53%)1:35.322Tim Day Jr · fastest of 10 · top 5 within 4.8s+2.841s (+3.07%)150.3Robert Iversen-8.430squal -9.057s91.9%qual 91.1%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%
27 rule changes (T1: 18, SM: 1, P2: 8)6 engine · 4 cars added · 3 weight · 2 induction · 1 aero · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 8 othershowhide
  • P2 P2 CN Engine Rebuild Clarification #31000engine
  • P2 F5 P2 Conversion #30856other
  • P2 Clarify minimum body width requirement #30859tyres & wheels
  • 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
  • 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
  • P2 E&O tonneau cover provision in cockpit opening section #30459other
  • P2 Remove effective dates in Table 1 #30468other
  • P2 E&O Maximum Valves Per Cylinder #30560engine
  • T1 Request For Reduction in Weight/Penalties for Camaro #30443weight
  • T1 Fix dry sump Contradictions in T1-LP vs T2 #30596suspension & brakes
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine
  • 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
  • T1 Correct T1 Limited Prep Years #29708wording
  • P2 Balance of Performance adjustments effective 01-01-2021 #29822induction
  • 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 Candelaria2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill+25.047squal +24.563s118.1%qual 117.8%2:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s153.1Robert Iversen-8.908squal -9.132s93.6%qual 93.4%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%
27 rule changes (T1: 13, SM: 2, P2: 6, FV: 6)7 tyres & wheels · 4 aero · 4 engine · 4 suspension & brakes · 3 induction · 2 cars added · 2 weight · 1 wordingshowhide
  • SM Radiator E&O Clarifications #29294engine
  • P2 E&O clarification of P2 rear wing requirements #29205aero
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T1 Touring Gurney flap wicker clarification #29013aero
  • FV Support for Recommended Item - 4 bolt wheels in FV #29084tyres & wheels
  • FV Support for 4-bolt pattern wheels #28955 #29118tyres & wheels
  • P2 Classify Elan NP01 in P2 Table 1 #28812cars added
  • T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction
  • 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
  • P2 Add ESR inlet restrictor #27869induction
  • 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
  • P2 Request for Fly by Wire Rule Wording Change #28247engine
  • T1 Request for E46 wagon with S54 engine in T1 #27427engine
  • 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
  • P2 Request for addition of BMW Engine in P2 Engine Table #27821engine
  • 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 Boden2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago+2.046squal +19.781s101.5%qual 117.2%1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s149.4Robert Iversen-24.155squal -5.660s82.0%qual 95.1%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%
38 rule changes (T1: 19, SM: 4, P2: 9, FV: 6)9 weight · 6 cars added · 5 engine · 4 induction · 4 tyres & wheels · 3 suspension & brakes · 1 aero · 2 wording · 4 othershowhide
  • FV Allowed Modifications E&O #27398other
  • P2 Update Engine Table Line E notes #27414engine
  • FV E&O Wheels #27230tyres & wheels
  • P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine
  • T1 T1 LP 2016 Camaro and Later #27198weight -100 lbs
  • T1 Request to return Ford Mustang Challenge Car to T1 #26751cars added
  • T1 Correct years in T1 FP Corvette spec #27023wording
  • P2 E&O Transmissions #27006tyres & wheels
  • T1 Request BoP Baten - T1 Camaro - Follow up to Letter # 26145 #26900induction
  • P2 Request to restrict all cars #26246weight
  • 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
  • P2 Change Engine Table Lines B.1 & B.5 #25777engine
  • P2 Change Line A.1 restrictor size #26429induction
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T1 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • FV FV Intake Manifold Clarification #26008induction
  • SM Request 99-00 replacement Wire harnesses #25602engine
  • SM Organize and Clarify 9.1.7.C.1.o. #25913weight
  • SM Strike Tire Tread Language #26123tyres & wheels
  • P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine
  • P2 Change CN inlet restrictor implementation date #25816induction
  • P2 Clarify Honda K20A-FD2 parts requirement #25950weight
  • 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 McCall1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn+14.153squal +14.385s114.0%qual 114.4%1:28.784Tim Day Jr · fastest of 17 · top 5 within 5.0s1:32.071Chuck Bona · fastest of 18 · top 5 within 0.9s144.4Tim Day Jr-9.054squal -11.186s91.0%qual 88.8%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 2.9s1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+16.229squal +16.513s115.8%qual 116.2%1:31.826Jeff Shafer · fastest of 26 · top 5 within 4.9s1:32.481Jeff Shafer · fastest of 24 · top 5 within 3.8s-10.390squal -9.967s89.9%qual 90.2%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 1.1s1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+11.455squal +11.858s112.8%qual 113.4%1:20.188Jeff Shafer · fastest of 18 · top 5 within 4.0s1:20.904Jeff Shafer · fastest of 16 · top 5 within 2.2s-8.405squal -8.468s90.6%qual 90.4%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 2.1s2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+28.573squal +25.099s124.7%qual 122.1%1:51.825Chris Farrell · fastest of 17 · top 5 within 3.6s1:52.355Jeff Shafer · fastest of 17 · top 5 within 2.8s-3.139squal -1.737s97.3%qual 98.5%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.