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BoP Lab / Classes / T1

T1 vs FF vs SM vs FP 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-SpecEPFAFCFE2vsFF×vsFP×FVFXGT1GT2GTXHPPP2vsSM×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 · FF 100.6% of T1 Neil Verhagen, Mid-Ohio Sports Car Course Runoffs 2016 qualifying · SM 101.5% of T1 Elivan Goulart, Virginia International Raceway Runoffs 2019 race · FP 95.3% of T1 Eric Prill, Virginia International Raceway Runoffs 2019 race

1:402:002:202:4035 rule changes between Runoffs 2018 and Runoffs 201935 ▾38 rule changes between Runoffs 2019 and Runoffs 202038 ▾43 rule changes between Runoffs 2020 and Runoffs 202143 ▾37 rule changes between Runoffs 2021 and Runoffs 202237 ▾27 rule changes between Runoffs 2022 and Runoffs 202327 ▾40 rule changes between Runoffs 2023 and Runoffs 202440 ▾44 rule changes between Runoffs 2024 and Runoffs 202544 ▾50 rule changes between Runoffs 2025 and Runoffs 202650 ▾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)FF race best at Runoffs 2015: 2:03.383 (Rick Payne)FF race best at Runoffs 2016: 1:30.133 (Neil Verhagen)FF race best at Runoffs 2017: 1:44.524 (Jonathon Kotyk)FF race best at Runoffs 2018: 1:42.049 (Jonathon Kotyk)FF race best at Runoffs 2019: 2:20.474 (Jonathan Kotyk)FF race best at Runoffs 2020: 2:24.268 (Jeffrey Bartz)FF race best at Runoffs 2021: 1:55.676 (Jonathan Kotyk)FF race best at Runoffs 2022: 2:18.358 (Jonathan Kotyk)FF race best at Runoffs 2023: 2:00.583 (Jonathan Kotyk)FF race best at Runoffs 2024: 2:22.057 (Sebastian Mateo Naranjo)FF race best at Runoffs 2025: 2:25.541 (Calvin Kautz)FF race best at Runoffs 2026: 2:23.686 (Nathan Down)FF qualifying best at Runoffs 2015: 2:02.489 (Tim Kautz)FF qualifying best at Runoffs 2016: 1:29.213 (Neil Verhagen)FF qualifying best at Runoffs 2017: 1:44.601 (Zach Holden)FF qualifying best at Runoffs 2018: 1:41.612 (Jonathon Kotyk)FF qualifying best at Runoffs 2019: 1:59.563 (Tyler O'Connor)FF qualifying best at Runoffs 2020: 2:22.916 (Simon Sikes)FF qualifying best at Runoffs 2021: 1:44.359 (Jonathan Kotyk)FF qualifying best at Runoffs 2022: 1:59.215 (Jonathan Kotyk)FF qualifying best at Runoffs 2023: 1:59.249 (Nolan Allaer)FF qualifying best at Runoffs 2024: 2:22.552 (Calvin Kautz)FF qualifying best at Runoffs 2025: 2:24.905 (Jonathan Kotyk)FF qualifying best at Runoffs 2026: 2:23.047 (David Ybarra)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)FP race best at Runoffs 2015: 2:12.419 (Kevin Ruck)FP race best at Runoffs 2016: 1:36.399 (John Walker)FP race best at Runoffs 2017: 1:53.007 (Eric Prill)FP race best at Runoffs 2018: 1:48.481 (Joe Huffaker)FP race best at Runoffs 2019: 2:08.076 (Eric Prill)FP race best at Runoffs 2020: 2:34.033 (Kevin Ruck)FP race best at Runoffs 2021: 1:59.933 (Cliff Ira)FP race best at Runoffs 2022: 2:17.641 (Mason Workman)FP race best at Runoffs 2023: 2:07.787 (Cliff Ira)FP race best at Runoffs 2024: 2:33.246 (Kevin Ruck)FP race best at Runoffs 2025: 2:34.271 (Chris Bovis)FP race best at Runoffs 2026: 2:33.240 (David Strittmatter)FP qualifying best at Runoffs 2015: 2:11.009 (Kevin Ruck)FP qualifying best at Runoffs 2016: 1:35.938 (John Walker)FP qualifying best at Runoffs 2017: 1:52.091 (Eric Prill)FP qualifying best at Runoffs 2018: 1:47.588 (Joe Huffaker)FP qualifying best at Runoffs 2019: 2:07.436 (Eric Prill)FP qualifying best at Runoffs 2020: 2:31.414 (Ethan Shippert)FP qualifying best at Runoffs 2021: 1:51.082 (Craig Chima)FP qualifying best at Runoffs 2022: 2:06.217 (Eric Prill)FP qualifying best at Runoffs 2023: 2:08.248 (Cliff Ira)FP qualifying best at Runoffs 2024: 2:32.327 (Cliff Ira)FP qualifying best at Runoffs 2025: 2:32.395 (David Strittmatter)FP qualifying best at Runoffs 2026: 2:33.275 (Stephen Simonds)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
T1FFSMFPsolid race · dashed qualifying · slower is lower
100%105%110%115%120%35 rule changes between Runoffs 2018 and Runoffs 201935 ▾38 rule changes between Runoffs 2019 and Runoffs 202038 ▾43 rule changes between Runoffs 2020 and Runoffs 202143 ▾37 rule changes between Runoffs 2021 and Runoffs 202237 ▾27 rule changes between Runoffs 2022 and Runoffs 202327 ▾40 rule changes between Runoffs 2023 and Runoffs 202440 ▾44 rule changes between Runoffs 2024 and Runoffs 202544 ▾50 rule changes between Runoffs 2025 and Runoffs 202650 ▾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)FF race best at Runoffs 2015: 106.8% of T1's (Rick Payne)FF race best at Runoffs 2016: 100.9% of T1's (Neil Verhagen)FF race best at Runoffs 2017: 101.6% of T1's (Jonathon Kotyk)FF race best at Runoffs 2018: 100.9% of T1's (Jonathon Kotyk)FF race best at Runoffs 2019: 104.5% of T1's (Jonathan Kotyk)FF race best at Runoffs 2020: 104.0% of T1's (Jeffrey Bartz)FF race best at Runoffs 2021: 111.5% of T1's (Jonathan Kotyk)FF race best at Runoffs 2022: 101.7% of T1's (Jonathan Kotyk)FF race best at Runoffs 2023: 104.4% of T1's (Jonathan Kotyk)FF race best at Runoffs 2024: 104.4% of T1's (Sebastian Mateo Naranjo)FF race best at Runoffs 2025: 102.8% of T1's (Calvin Kautz)FF qualifying best at Runoffs 2015: 107.9% of T1's (Tim Kautz)FF qualifying best at Runoffs 2016: 100.6% of T1's (Neil Verhagen)FF qualifying best at Runoffs 2017: 102.8% of T1's (Zach Holden)FF qualifying best at Runoffs 2018: 101.6% of T1's (Jonathon Kotyk)FF qualifying best at Runoffs 2019: 104.2% of T1's (Tyler O'Connor)FF qualifying best at Runoffs 2020: 103.8% of T1's (Simon Sikes)FF qualifying best at Runoffs 2021: 102.0% of T1's (Jonathan Kotyk)FF qualifying best at Runoffs 2022: 103.8% of T1's (Jonathan Kotyk)FF qualifying best at Runoffs 2023: 104.1% of T1's (Nolan Allaer)FF qualifying best at Runoffs 2024: 104.4% of T1's (Calvin Kautz)FF qualifying best at Runoffs 2025: 103.0% of T1's (Jonathan Kotyk)Off the chart: 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)Off the chart: 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)FP race best at Runoffs 2015: 114.7% of T1's (Kevin Ruck)FP race best at Runoffs 2016: 107.9% of T1's (John Walker)FP race best at Runoffs 2017: 109.9% of T1's (Eric Prill)FP race best at Runoffs 2018: 107.3% of T1's (Joe Huffaker)Off the chart: FP race best at Runoffs 2019: 95.3% of T1's (Eric Prill)FP race best at Runoffs 2020: 111.1% of T1's (Kevin Ruck)FP race best at Runoffs 2021: 115.6% of T1's (Cliff Ira)FP race best at Runoffs 2022: 101.2% of T1's (Mason Workman)FP race best at Runoffs 2023: 110.6% of T1's (Cliff Ira)FP race best at Runoffs 2024: 112.6% of T1's (Kevin Ruck)FP race best at Runoffs 2025: 108.9% of T1's (Chris Bovis)FP qualifying best at Runoffs 2015: 115.4% of T1's (Kevin Ruck)FP qualifying best at Runoffs 2016: 108.2% of T1's (John Walker)FP qualifying best at Runoffs 2017: 110.1% of T1's (Eric Prill)FP qualifying best at Runoffs 2018: 107.6% of T1's (Joe Huffaker)FP qualifying best at Runoffs 2019: 111.0% of T1's (Eric Prill)FP qualifying best at Runoffs 2020: 110.0% of T1's (Ethan Shippert)FP qualifying best at Runoffs 2021: 108.6% of T1's (Craig Chima)FP qualifying best at Runoffs 2022: 109.9% of T1's (Eric Prill)FP qualifying best at Runoffs 2023: 112.0% of T1's (Cliff Ira)FP qualifying best at Runoffs 2024: 111.5% of T1's (Cliff Ira)FP qualifying best at Runoffs 2025: 108.3% of T1's (David Strittmatter)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
T1FFSMFPsolid 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
EventT1FFSMFP
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 20262026-09-282:23.047David Ybarra · fastest of 20 · top 5 within 1.4s-1.858s (-1.28%)2:23.686Nathan Down · fastest of 20 · top 5 within 1.6s-1.855s (-1.27%)138.9Tazio Stefanelli+0.5 mph (+0.3%)2:42.173Brett 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%)2:33.275Stephen Simonds · fastest of 26 · top 5 within 1.0s+0.880s (+0.58%)2:33.240David Strittmatter · fastest of 25 · top 5 within 1.7s-1.031s (-0.67%)132.4David Strittmatter±0.0 mph (±0.0%)
50 rule changes (T1: 12, FF: 2, SM: 2, FP: 34)13 weight · 10 engine · 10 induction · 4 tyres & wheels · 2 cars added · 1 removed · 1 suspension & brakes · 5 wording · 4 othershowhide
  • FP Mini Cooper Compression Ratio #40517engine
  • FF Clarification in FF Kent 1600 Compression Ratio Paragraph #40293engine
  • FP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • FP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • FP HP Honda Civic (92-95) #40464weight -70 lbs
  • SM Rear Toe Link #40271other
  • T1 Tire Equality #40342tyres & wheels
  • T1 Trunk Lid Wording #40177tyres & wheels
  • FP Miata track width - errors and omissions #39976wording
  • FP GCR Spec Line Correction #39977induction
  • FP CGR Spec Line Weight Correction #39978weight
  • FP Triumph GT6 Spec Change. #40098induction
  • FP Request to Classify BMW E21 320i #40110cars added
  • FP BMW 318is 84-85 engine displacement correction #40116engine
  • 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
  • FP Correct Valve Sizes on FP Fiat x19 1300 and 1500 #39850engine
  • FP Dual Carburetor Adjustments #39851induction
  • T1 Replace OEM Heat Exchanger (Intercooler) With Aftermarket #39542other
  • FP Request Toyota 5E Series Engines #38208engine
  • FP Request for Toyota 4E Series Engines #38209engine
  • FP Dual Carbs for the Fiat X1/9 #39593induction
  • T1 LS1 into Corvette C6 Spec Line Request #39716weight
  • FF Formula F Alternative Tire Rule Proposed Clarifications #39281tyres & wheels
  • T1 additional T1 adjustment #39520induction
  • FP TR2 Notes E&O #39180weight
  • FP Balance of Power #39187weight +50 lbs
  • FP Competition Adjustment Request #39259weight -80 lbs
  • FP Factory Roll Bar Removal on VW Convertible #39268wording
  • FP FP Parity Request #39325weight +50 lbs
  • FP Adjust former-GTL Honda's with B/D-Series Engines #39374engine
  • 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
  • FP Please Lower Weight of 280Z #38871weight -160 lbs
  • FP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • FP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • FP HP Volvo 142 spec omission #38994engine
  • FP HP Mini DOHC 1.6 #38996engine
  • FP 83-88 FP Scirocco Spec Line Creation #38997cars added
  • FP Add to Rabbit description #39019wording
  • FP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • FP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • FP Correct Existing VW Scirocco Spec Line #39140weight
  • FP HP Plymouth Arrow spec omission #38995wording
  • FP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • FP Add TB ID tolerance to general Prod rules #39009induction
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%)2:24.905Jonathan Kotyk · fastest of 17 · top 5 within 1.1s+2.353s (+1.65%)2:25.541Calvin Kautz · fastest of 16 · top 5 within 0.5s+3.484s (+2.45%)138.4Tazio Stefanelli-2.3 mph (-1.6%)+3.929squal +4.228s102.8%qual 103.0%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%2:32.395David Strittmatter · fastest of 20 · top 5 within 2.9s+0.068s (+0.04%)2:34.271Chris Bovis · fastest of 19 · top 5 within 1.8s+1.025s (+0.67%)132.4David Strittmatter-1.1 mph (-0.8%)+12.659squal +11.718s108.9%qual 108.3%
44 rule changes (T1: 19, FF: 4, SM: 4, FP: 17)16 weight · 6 cars added · 6 tyres & wheels · 5 induction · 4 engine · 1 wording · 6 othershowhide
  • FP BMW Z4 update #38490induction
  • FP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • FP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • FF Page 228, FF tire rule 9.1.1.10.e #38251tyres & wheels
  • 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
  • FP Request for Classification of Chevrolet Spark #37755cars added
  • FP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • T1 Cadillac CT4-V Blackwing #38003cars added
  • FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change #37802tyres & wheels
  • FP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • FP FP Class Adjustments #37458weight
  • FP Interpretation of Production Rules on Mirrors #37235other
  • FP Weight Reduction for Honda S2000 #37466weight
  • FP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • FP Errors & Omissions #37648cars added
  • FP GTL/FP consolidation 2025 Rules #37659induction
  • T1 Correct and make new T1 BOP adjustments. #37737weight +75 lbs
  • FP Effective date for Jan 2025 GCR updates #37654induction
  • 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
  • FP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • FP Fix Error in Spridget Spec Line #37437engine
  • FP Create ruleset that allows GTL cars to run in FP #37485other
  • 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
  • FF Change FF/FC Weight with Sequential Gearbox #36651weight
  • FF Alternative Oversize Honda Fit Pistons #37064weight
  • FP 1275 HP Spridget Level 2 Only #36518other
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%)2:22.552Calvin Kautz · fastest of 13 · top 5 within 1.1s-0.364s (-0.25%)2:22.057Sebastian Mateo Naranjo · fastest of 13 · top 5 within 0.6s-2.211s (-1.53%)140.7Calvin Kautz+2.6 mph (+1.9%)+5.926squal +5.974s104.4%qual 104.4%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%2:32.327Cliff Ira · fastest of 26 · top 5 within 2.1s+0.913s (+0.60%)2:33.246Kevin Ruck · fastest of 24 · top 5 within 1.4s-0.787s (-0.51%)133.5David Strittmatter+0.3 mph (+0.2%)+17.115squal +15.749s112.6%qual 111.5%
40 rule changes (T1: 13, FF: 2, SM: 4, FP: 21)11 weight · 8 cars added · 5 engine · 5 induction · 1 suspension & brakes · 4 wording · 6 othershowhide
  • FF Update to FF EGR Blanking Plate Rule #36633engine
  • FP Errors/emissions Honda Civic/CRX #36700wording
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • FP Errant entry in HP production line item #36231other
  • FP NIssan 300ZX Z31 to EP #35830cars added
  • FP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • FP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • FP Request to Replace CRX Plastic Panels #35876wording
  • FP FP data and parity #35896induction
  • T1 Please Expedite classing the C63 Mercedes #35987cars added
  • T1 Honda S2000 #35582cars added
  • FP GCR Correction - Redundant HP Spec Lines #35623engine
  • FP Update FP Protege (01-03) Model Info #35715other
  • T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023 #35411cars added
  • FP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • T1 C8 Corvette T1 Restrictor Plate Request #35213induction
  • T1 The Cars Have Expired #35379induction
  • FF Honda Fit Oversize Piston Rings #35305other
  • FP FP data #35060weight +25 lbs
  • FP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • FP Corrections to Honda Spec Lines in FP #35250induction
  • FP Miata Alternate Head #35253weight -50 lbs
  • FP Triumph GT6 Adjustments #35255weight
  • FP Honda S2000 throttle body #35272induction
  • FP Correction within Triumph TR8 Spec Line #35315engine
  • FP Correction to EP 924S/944 Spec Line #35317weight
  • T1 GT4 batch adjustment in T1 #35162weight -85 lbs
  • T1 Remove T1 spec lines #35192other
  • FP Porsche 944/924S Rule Change Request #35002weight
  • FP FP and HP Toyota Corolla #35030weight -43 lbs
  • FP Triumph GT6 Adjustments #35054weight -30 lbs
  • 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%)1:59.249Nolan Allaer · fastest of 8 · top 5 within 2.8s+0.034s (+0.03%)2:00.583Jonathan Kotyk · fastest of 8 · top 5 within 0.4s-17.775s (-12.85%)138.4Calvin Kautz+0.1 mph (+0.1%)+5.095squal +4.729s104.4%qual 104.1%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%2:08.248Cliff Ira · fastest of 21 · top 5 within 1.0s+2.031s (+1.61%)2:07.787Cliff Ira · fastest of 20 · top 5 within 0.8s-9.854s (-7.16%)133.7Cliff Ira+1.1 mph (+0.9%)+12.299squal +13.728s110.6%qual 112.0%
27 rule changes (T1: 19, FF: 1, SM: 1, FP: 6)5 cars added · 4 induction · 4 weight · 3 engine · 2 tyres & wheels · 1 aero · 1 removed · 2 wording · 5 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
  • FP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • FP ITC to FP? #34286other
  • 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
  • FP Request to Classify Sonic and Fiesta in HP #34264cars added
  • T1 Request to reinstate T1 S197 Mustang #34048cars added
  • FP Classification Request for 1978 Toyota Celica #34097cars added
  • T1 T1 GT4 adjustments #33786other
  • T1 Touring 1 Tire Sizes #34191tyres & wheels
  • T1 Clarification for Camaro Gen5 2010-2015 #33739cars added
  • FF Add Fast Forward Part Numbers for Honda Fit Engine #33752engine
  • T1 Sequential Gearbox Limitations in T1 #33691weight
  • T1 T1 GT4 adjustments #33786weight
  • T1 Sunset of pre 2023 Touring 1 Rules. #33916removed
  • FP Request to Add Mazda Protege P5 to FP #33664other
  • T1 Corrections to T1 Spec Lines #33678tyres & wheels
  • FP Review Limited Prep Port Matching Rules #33600induction
  • 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%)1:59.215Jonathan Kotyk · fastest of 13 · top 5 within 1.2s-0.348s (-0.29%)2:18.358Jonathan Kotyk · fastest of 12 · top 5 within 2.4s-2.116s (-1.51%)138.3Tim Kautz+2.2 mph (+1.6%)+2.291squal +4.325s101.7%qual 103.8%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%2:06.217Eric Prill · fastest of 18 · top 5 within 1.5s-1.219s (-0.96%)2:17.641Mason Workman · fastest of 15 · top 5 within 3.2s+9.565s (+7.47%)132.5Cliff Ira+1.2 mph (+0.9%)+1.574squal +11.327s101.2%qual 109.9%
37 rule changes (T1: 11, SM: 1, FP: 25)10 induction · 8 weight · 6 cars added · 4 engine · 2 suspension & brakes · 2 tyres & wheels · 2 wording · 3 othershowhide
  • FP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • FP Request Rotary Injection on Dual Y manifold #32775engine
  • FP Request for Corrado Stroke & Displacement Correction #32985engine
  • T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs #32824weight -25 lbs
  • FP Subaru BRZ Model Years #32500other
  • T1 Fix FP350S limited prep and Shelby 350 full prep issues #31680induction
  • T1 Request to Classify AMG GT4 #32610cars added
  • FP Weight Adjustment of Lotus 7 #32213weight +50 lbs
  • FP EP MX-5 Global Cup Car #32218weight
  • FP Please Class BMW 128i in EP #32370cars added
  • FP Inconsistency in Body Work Descriptions #32396other
  • FP Request to classify the 1999-2000 Mazda Protege in FP #32398cars added
  • FP Mazda RX8 with 13b Rotary #32170induction
  • FP Request Idle control valve clarification #32178engine
  • FP Correct FP BMW 325e/es Displacement #32394engine
  • 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
  • FP EP Adjustments #31858induction
  • FP 1999 3.8L Ford Mustang to EP? #31635weight
  • FP Improved Touring Tires #32064tyres & wheels
  • FP VW Golf Jetta 2.0L intake and exhaust size correction. #32173induction
  • 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
  • FP Throttle Body and Idle Air #31800induction
  • FP Porsche 968 Engine Questions #31478induction
  • FP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • FP BMW Z3 2.5L Spec Line #31724induction
  • FP FP Del Sol VTEC #31859induction
  • FP Standardize Level 2 Classifications in FP #31868induction
  • FP 944S2 Restrictor #31396induction
  • FP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • T1 Turbo Miata Help #31315weight +200 lbs
  • T1 Fix the T1 Corvette heading #31528wording
  • FP E&O; MR2 Track #31120wording
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 Boden1:44.359Jonathan Kotyk · fastest of 24 · top 5 within 1.1s-0.242s (-0.23%)1:55.676Jonathan Kotyk · fastest of 23 · top 5 within 1.8s+11.152s (+10.67%)141.6Nicholas Sheppard+11.924squal +2.067s111.5%qual 102.0%1:57.695Brian 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%1:51.082Craig Chima · fastest of 39 · top 5 within 1.2s-1.009s (-0.90%)1:59.933Cliff Ira · fastest of 33 · top 5 within 5.4s+6.926s (+6.13%)131.8Cliff Ira+16.181squal +8.790s115.6%qual 108.6%
43 rule changes (T1: 18, FF: 3, SM: 1, FP: 21)11 cars added · 10 weight · 8 engine · 3 suspension & brakes · 2 induction · 1 aero · 2 wording · 6 othershowhide
  • FP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • FP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • T1 T1 E46 BOP E&O for Letter # 29970 #30934weight +100 lbs
  • FP Lotus/Caterham 7 America Request #30392engine
  • FP Request to classify ITC Plymouth Arrow #30588cars added
  • FP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added
  • FP Fiat x1/9 Competition Adjustments #30711weight -50 lbs
  • FP Reclassify Daimler SP 250 #30721cars added
  • T1 Request BoP for the Viper in 1 LP #29968other
  • T1 LS6 Alternative Head Question #30074engine
  • FP Move Porsche 924 in Level 1 Prep From EP to FP #30135cars added
  • FP Clarify Application of Percentage Based Weight Penalties #30669weight
  • 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
  • FP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • FP Fiat X1/9 brake rotors #30423suspension & brakes
  • T1 Request For Reduction in Weight/Penalties for Camaro #30443weight
  • T1 Fix dry sump Contradictions in T1-LP vs T2 #30596suspension & brakes
  • FF Kent crankshaft clarification #30426wording
  • FP Please Classify Mazda3 in FP #30165cars added
  • FP Golf MkIII Valve Size Request #30268engine
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • 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
  • FP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • FP Request VW weight break #29963weight -50 lbs
  • T1 Correct T1 Limited Prep Years #29708wording
  • FF Allow Optional Coolant Bleed Line to Correct a Known Problem #29673engine
  • FF Clarification regarding Honda LC1 ECU implementation date #29684engine
  • FP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • FP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • FP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • FP EP TR8 Adjustment #29512weight -100 lbs
  • FP Request to Classify 1996-2000 Honda Civic EX #29515cars added
  • FP FAJS Carburetor #29576other
  • 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 Candelaria2:22.916Simon Sikes · fastest of 14 · top 5 within 1.6s2:24.268Jeffrey Bartz · fastest of 14 · top 5 within 0.4s138.1Jeffrey Bartz+5.567squal +5.270s104.0%qual 103.8%2:42.209Kyle 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%2:31.414Ethan Shippert · fastest of 23 · top 5 within 2.2s2:34.033Kevin Ruck · fastest of 21 · top 5 within 2.3s133.2Sam Henry+15.332squal +13.768s111.1%qual 110.0%
38 rule changes (T1: 13, FF: 4, SM: 2, FP: 19)9 engine · 6 cars added · 5 induction · 5 weight · 4 suspension & brakes · 3 aero · 3 tyres & wheels · 3 wordingshowhide
  • FP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • SM Radiator E&O Clarifications #29294engine
  • FF Clarification regarding Honda LC1 ECU implementation #29135engine
  • FP EP BMW Z3 Rule Clarification #28998engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T1 Touring Gurney flap wicker clarification #29013aero
  • FP Request to Classify Porsche 911 2.0L #28456cars added
  • FP Request to change to Carburetor Spec Line 84-87 Mazda 626 #28926induction
  • FP BMW Cylinder Head Casting and Part Numbers #28708engine
  • FP Correct Scirocco Spec line E&O #28892weight
  • T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • FP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • FP Error in Mini Cooper Spec Line #28713wording
  • 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
  • FF E&O FF Kent Engine alternator language #28204engine
  • FP Caterham 7 Spec Line #28498engine
  • FP Request to classify SOHC 1989-90 240SX in F prod L2 #28553cars added
  • 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
  • FF Honda Racing HPD low cost ECU proposal #27563engine
  • FF Update rain tire designation #28443tyres & wheels
  • FP VW Weight and Valve Size Request #27886weight
  • FP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • FP Request to classify Porsche 914 2L in LPrep FProd #28231cars added
  • FP Request Ford Fiesta Weight Adjustment #28336weight
  • T1 Request for E46 wagon with S54 engine in T1 #27427engine
  • FP Request for Help for Datsun 1200 #27934induction
  • 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
  • FP Request to List Mazda Miata Throttle Body Size #27907induction
  • FP Request to Classify 2001-2003 Mazda Protege ES in FP #27922cars added
  • FP Request to Correct Track of 1988-91 Honda Civic #27487wording
  • FP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
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 Boden1:59.563Tyler O'Connor · fastest of 14 · top 5 within 1.4s2:20.474Jonathan Kotyk · fastest of 14 · top 5 within 6.3s136.2Derek Ketchie+6.061squal +4.792s104.5%qual 104.2%2:14.552Todd 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%2:07.436Eric Prill · fastest of 19 · top 5 within 0.6s2:08.076Eric Prill · fastest of 18 · top 5 within 0.8s131.4Ken Kannard-6.337squal +12.665s95.3%qual 111.0%
35 rule changes (T1: 19, FF: 3, SM: 4, FP: 9)8 weight · 7 cars added · 4 induction · 3 engine · 3 suspension & brakes · 3 tyres & wheels · 1 aero · 3 wording · 3 othershowhide
  • FP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • FP Request to classify the GMX5 2019 #27263cars added
  • FP level one susp. component rule #27270suspension & brakes
  • FP Clarification of Carb Rules - Prep 1 #27300induction
  • FP Clarification of Carb Rules - Prep 2 #27301induction
  • T1 T1 LP 2016 Camaro and Later #27198weight -100 lbs
  • FP Request Miata Eligibility - 2003 #27121other
  • 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
  • T1 Clarify DOT tires touring #26556tyres & wheels
  • 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
  • FP Rollcenter Correction Clarification #25873tyres & wheels
  • FP Hardtops #26476wording
  • T1 Request to classify the Porsche 928GTS/S4 in Touring 1 #26315cars added
  • FP Request Classification of Dodge Daytona in F Production #26259weight -150 lbs
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T1 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • FF Request for Oversize Honda Fit Pistons #25810engine
  • FF Heat Shield - Fit Intake #26102induction
  • FF Request catch cans/tanks clarification #26158engine
  • 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
  • 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 McCall1:41.612Jonathon Kotyk · fastest of 22 · top 5 within 1.7s1:42.049Jonathon Kotyk · fastest of 22 · top 5 within 1.3s115.7Denny Renfrow+0.924squal +1.642s100.9%qual 101.6%1:54.355Ken 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%1:47.588Joe Huffaker · fastest of 15 · top 5 within 3.0s1:48.481Joe Huffaker · fastest of 14 · top 5 within 2.2s109.1Joe Huffaker+7.356squal +7.618s107.3%qual 107.6%
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 2.9s1:44.601Zach Holden · fastest of 36 · top 5 within 1.2s1:44.524Jonathon Kotyk · fastest of 36 · top 5 within 0.5s+1.653squal +2.808s101.6%qual 102.8%1:58.306Chris 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%1:52.091Eric Prill · fastest of 42 · top 5 within 1.2s1:53.007Eric Prill · fastest of 40 · top 5 within 0.7s+10.136squal +10.298s109.9%qual 110.1%
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 1.1s1:29.213Neil Verhagen · fastest of 14 · top 5 within 2.1s1:30.133Neil Verhagen · fastest of 14 · top 5 within 1.4s+0.824squal +0.557s100.9%qual 100.6%1:40.514Justin 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%1:35.938John Walker · fastest of 33 · top 5 within 0.4s1:36.399John Walker · fastest of 27 · top 5 within 0.3s+7.090squal +7.282s107.9%qual 108.2%
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 2.1s2:02.489Tim Kautz · fastest of 25 · top 5 within 1.1s2:03.383Rick Payne · fastest of 22 · top 5 within 0.8s+7.889squal +8.927s106.8%qual 107.9%2:18.661Andrew 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%2:11.009Kevin Ruck · fastest of 20 · top 5 within 1.6s2:12.419Kevin Ruck · fastest of 18 · top 5 within 1.1s+16.925squal +17.447s114.7%qual 115.4%

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.