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BoP Lab / Classes / FF

FF vs FM vs T1 vs SM pace at every track

Lap times across years say as much about the weather as the class. % of FF is each class's best lap as a share of FF'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-SpecEPFAFCFE2FF×vsFM×FPFVFXGT1GT2GTXHPPP2vsSM×SMXSRF3STLSTUvsT1×T2T3T4Show 50 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: FF 100.0% of FF Rick Payne, Daytona International Speedway Runoffs 2015 race · FM 95.7% of FF Joseph Burton-Harris, Daytona International Speedway Runoffs 2015 race · T1 89.7% of FF Mark Boden, Indianapolis Motor Speedway Runoffs 2021 race · SM 97.1% of FF Elivan Goulart, Virginia International Raceway Runoffs 2019 race

1:201:402:002:202:4026 rule changes between Runoffs 2018 and Runoffs 201926 ▾19 rule changes between Runoffs 2019 and Runoffs 202019 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾12 rule changes between Runoffs 2021 and Runoffs 202212 ▾21 rule changes between Runoffs 2022 and Runoffs 202321 ▾19 rule changes between Runoffs 2023 and Runoffs 202419 ▾27 rule changes between Runoffs 2024 and Runoffs 202527 ▾16 rule changes between Runoffs 2025 and Runoffs 202616 ▾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)FM race best at Runoffs 2015: 1:58.029 (Joseph Burton-Harris)FM race best at Runoffs 2016: 1:27.922 (Jacob Loomis)FM race best at Runoffs 2017: 1:41.146 (Jarret Voorhies)FM race best at Runoffs 2018: 1:37.909 (Bryce Cornet)FM race best at Runoffs 2019: 2:15.816 (Bryce Cornet)FM qualifying best at Runoffs 2015: 1:57.804 (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 1:26.043 (Jacob Loomis)FM qualifying best at Runoffs 2017: 1:41.231 (Jarret Voorhies)FM qualifying best at Runoffs 2018: 1:37.598 (Bryce Cornet)FM qualifying best at Runoffs 2019: 1:55.124 (Bryce Cornet)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)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
FFFMT1SMsolid race · dashed qualifying · slower is lower
95%100%105%110%115%26 rule changes between Runoffs 2018 and Runoffs 201926 ▾19 rule changes between Runoffs 2019 and Runoffs 202019 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾12 rule changes between Runoffs 2021 and Runoffs 202212 ▾21 rule changes between Runoffs 2022 and Runoffs 202321 ▾19 rule changes between Runoffs 2023 and Runoffs 202419 ▾27 rule changes between Runoffs 2024 and Runoffs 202527 ▾16 rule changes between Runoffs 2025 and Runoffs 202616 ▾FF race best at Runoffs 2015: 100.0% of FF's (Rick Payne)FF race best at Runoffs 2016: 100.0% of FF's (Neil Verhagen)FF race best at Runoffs 2017: 100.0% of FF's (Jonathon Kotyk)FF race best at Runoffs 2018: 100.0% of FF's (Jonathon Kotyk)FF race best at Runoffs 2019: 100.0% of FF's (Jonathan Kotyk)FF race best at Runoffs 2020: 100.0% of FF's (Jeffrey Bartz)FF race best at Runoffs 2021: 100.0% of FF's (Jonathan Kotyk)FF race best at Runoffs 2022: 100.0% of FF's (Jonathan Kotyk)FF race best at Runoffs 2023: 100.0% of FF's (Jonathan Kotyk)FF race best at Runoffs 2024: 100.0% of FF's (Sebastian Mateo Naranjo)FF race best at Runoffs 2025: 100.0% of FF's (Calvin Kautz)FF race best at Runoffs 2026: 100.0% of FF's (Nathan Down)FF qualifying best at Runoffs 2015: 100.0% of FF's (Tim Kautz)FF qualifying best at Runoffs 2016: 100.0% of FF's (Neil Verhagen)FF qualifying best at Runoffs 2017: 100.0% of FF's (Zach Holden)FF qualifying best at Runoffs 2018: 100.0% of FF's (Jonathon Kotyk)FF qualifying best at Runoffs 2019: 100.0% of FF's (Tyler O'Connor)FF qualifying best at Runoffs 2020: 100.0% of FF's (Simon Sikes)FF qualifying best at Runoffs 2021: 100.0% of FF's (Jonathan Kotyk)FF qualifying best at Runoffs 2022: 100.0% of FF's (Jonathan Kotyk)FF qualifying best at Runoffs 2023: 100.0% of FF's (Nolan Allaer)FF qualifying best at Runoffs 2024: 100.0% of FF's (Calvin Kautz)FF qualifying best at Runoffs 2025: 100.0% of FF's (Jonathan Kotyk)FF qualifying best at Runoffs 2026: 100.0% of FF's (David Ybarra)FM race best at Runoffs 2015: 95.7% of FF's (Joseph Burton-Harris)FM race best at Runoffs 2016: 97.5% of FF's (Jacob Loomis)FM race best at Runoffs 2017: 96.8% of FF's (Jarret Voorhies)FM race best at Runoffs 2018: 95.9% of FF's (Bryce Cornet)FM race best at Runoffs 2019: 96.7% of FF's (Bryce Cornet)FM qualifying best at Runoffs 2015: 96.2% of FF's (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 96.4% of FF's (Jacob Loomis)FM qualifying best at Runoffs 2017: 96.8% of FF's (Jarret Voorhies)FM qualifying best at Runoffs 2018: 96.0% of FF's (Bryce Cornet)FM qualifying best at Runoffs 2019: 96.3% of FF's (Bryce Cornet)T1 race best at Runoffs 2015: 93.6% of FF's (Andrew Aquilante)T1 race best at Runoffs 2016: 99.1% of FF's (Ross Murray)T1 race best at Runoffs 2017: 98.4% of FF's (Andrew Aquilante)T1 race best at Runoffs 2018: 99.1% of FF's (Kristofer Olson)T1 race best at Runoffs 2019: 95.7% of FF's (Andrew Aquilante)T1 race best at Runoffs 2020: 96.1% of FF's (Mark Boden)Off the chart: T1 race best at Runoffs 2021: 89.7% of FF's (Mark Boden)T1 race best at Runoffs 2022: 98.3% of FF's (Andrew Aquilante)T1 race best at Runoffs 2023: 95.8% of FF's (Andrew Aquilante)T1 race best at Runoffs 2024: 95.8% of FF's (Andrew Aquilante)T1 race best at Runoffs 2025: 97.3% of FF's (Drew Delmonico)T1 qualifying best at Runoffs 2015: 92.7% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2016: 99.4% of FF's (Ross Murray)T1 qualifying best at Runoffs 2017: 97.3% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2018: 98.4% of FF's (Kristofer Olson)T1 qualifying best at Runoffs 2019: 96.0% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2020: 96.3% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2021: 98.0% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2022: 96.4% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2023: 96.0% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2024: 95.8% of FF's (Andrew Aquilante)T1 qualifying best at Runoffs 2025: 97.1% of FF's (James Candelaria)Off the chart: SM race best at Runoffs 2015: 116.8% of FF's (Todd Lamb)SM race best at Runoffs 2016: 111.8% of FF's (Michael Carter)SM race best at Runoffs 2017: 113.9% of FF's (Michael Gagliardo)SM race best at Runoffs 2018: 113.0% of FF's (Michael Carter)SM race best at Runoffs 2019: 97.1% of FF's (Elivan Goulart)SM race best at Runoffs 2020: 113.5% of FF's (Preston Pardus)SM race best at Runoffs 2021: 102.7% of FF's (Brian Henderson)SM race best at Runoffs 2022: 100.5% of FF's (Travis Wiley)SM race best at Runoffs 2023: 113.0% of FF's (Julian DaCosta)SM race best at Runoffs 2024: 113.7% of FF's (Brett Kowalski)SM race best at Runoffs 2025: 113.0% of FF's (Kyle Greenhill)SM race best at Runoffs 2026: 113.3% of FF's (Francisco Barroso)SM qualifying best at Runoffs 2015: 113.2% of FF's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 112.7% of FF's (Justin Hille)SM qualifying best at Runoffs 2017: 113.1% of FF's (Chris Haldeman)SM qualifying best at Runoffs 2018: 112.5% of FF's (Ken Sutherland)SM qualifying best at Runoffs 2019: 112.5% of FF's (Todd Buras)SM qualifying best at Runoffs 2020: 113.5% of FF's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 112.8% of FF's (Brian Henderson)SM qualifying best at Runoffs 2022: 113.0% of FF's (Danny Steyn)SM qualifying best at Runoffs 2023: 113.2% of FF's (Danny Steyn)SM qualifying best at Runoffs 2024: 113.0% of FF's (Ethan Goulart)SM qualifying best at Runoffs 2025: 112.6% of FF's (Bobby Gossett)SM qualifying best at Runoffs 2026: 113.4% of FF's (Brett Kowalski)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
FFFMT1SMsolid race · dashed qualifying · each class's best lap as a share of FF's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFFFMT1SM
Qual best Race best Trap Qual best Race best Trap vs FF % of FF Qual best Race best Trap vs FF % of FF Qual best Race best Trap vs FF % of FF 
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%)+19.039squal +19.126s113.3%qual 113.4%
16 rule changes (FF: 2, T1: 12, SM: 2)3 induction · 3 tyres & wheels · 3 weight · 1 engine · 1 removed · 1 wording · 4 othershowhide
  • FF Clarification in FF Kent 1600 Compression Ratio Paragraph #40293engine
  • 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
  • FF Formula F Alternative Tire Rule Proposed Clarifications #39281tyres & wheels
  • 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 20252025-09-292:24.905Jonathan 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%)2:20.677James 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%)-3.929squal -4.228s97.3%qual 97.1%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%)+18.889squal +18.206s113.0%qual 112.6%
27 rule changes (FF: 4, T1: 19, SM: 4)9 weight · 6 tyres & wheels · 4 cars added · 3 engine · 1 induction · 1 wording · 3 othershowhide
  • 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
  • T1 Cadillac CT4-V Blackwing #38003cars added
  • FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change #37802tyres & wheels
  • 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
  • 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
Road America Runoffs 20242024-10-012:22.552Calvin 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%)2:16.578Andrew 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%)-5.926squal -5.974s95.8%qual 95.8%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%)+19.429squal +18.554s113.7%qual 113.0%
19 rule changes (FF: 2, T1: 13, SM: 4)6 cars added · 3 engine · 2 induction · 2 weight · 1 suspension & brakes · 1 wording · 4 othershowhide
  • FF Update to FF EGR Blanking Plate Rule #36633engine
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • 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
  • FF Honda Fit Oversize Piston Rings #35305other
  • T1 GT4 batch adjustment in T1 #35162weight -85 lbs
  • T1 Remove T1 spec lines #35192other
  • 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 20232023-09-231:59.249Nolan 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%)1:54.520Andrew 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%)-5.095squal -4.729s95.8%qual 96.0%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%)+15.646squal +15.737s113.0%qual 113.2%
21 rule changes (FF: 1, T1: 19, SM: 1)4 weight · 3 cars added · 3 engine · 2 induction · 2 tyres & wheels · 1 aero · 1 removed · 2 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
  • 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
  • T1 Corrections to T1 Spec Lines #33678tyres & wheels
  • SM BOP for NB1 and NB2 #32309weight
  • T1 GT4 section to Current T1 Rules. #33632weight
Virginia International Raceway Runoffs 20222022-09-241:59.215Jonathan 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%)1:54.890Andrew 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%)-2.291squal -4.325s98.3%qual 96.4%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%)+0.749squal +15.449s100.5%qual 113.0%
12 rule changes (T1: 11, SM: 1)5 weight · 2 cars added · 2 suspension & brakes · 1 induction · 1 wording · 1 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
  • 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
  • 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
  • T1 Turbo Miata Help #31315weight +200 lbs
  • T1 Fix the T1 Corvette heading #31528wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:44.359Jonathan 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 Sheppard1:42.292Andrew 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 Boden-11.924squal -2.067s89.7%qual 98.0%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+3.161squal +13.336s102.7%qual 112.8%
22 rule changes (FF: 3, T1: 18, SM: 1)5 engine · 4 cars added · 3 weight · 1 aero · 1 induction · 1 suspension & brakes · 2 wording · 5 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
  • 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
  • FF Kent crankshaft clarification #30426wording
  • 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
  • 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
  • T1 Changes to Corvette C8 #29898weight -100 lbs
Road America Runoffs 20202020-10-022:22.916Simon Sikes · fastest of 14 · top 5 within 1.6s2:24.268Jeffrey Bartz · fastest of 14 · top 5 within 0.4s138.1Jeffrey Bartz2:17.646Andrew Aquilante · fastest of 15 · top 5 within 3.7s2:18.701Mark Boden · fastest of 14 · top 5 within 3.0s158.8James Candelaria-5.567squal -5.270s96.1%qual 96.3%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+19.480squal +19.293s113.5%qual 113.5%
19 rule changes (FF: 4, T1: 13, SM: 2)5 engine · 4 suspension & brakes · 3 aero · 2 tyres & wheels · 2 weight · 1 cars added · 1 induction · 1 wordingshowhide
  • SM Radiator E&O Clarifications #29294engine
  • FF Clarification regarding Honda LC1 ECU implementation #29135engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T1 Touring Gurney flap wicker clarification #29013aero
  • T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • 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
  • 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
  • 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
Virginia International Raceway Runoffs 20192019-10-051:59.563Tyler O'Connor · fastest of 14 · top 5 within 1.4s2:20.474Jonathan Kotyk · fastest of 14 · top 5 within 6.3s136.2Derek Ketchie1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s135.7Bryce Cornet-4.658squal -4.439s96.7%qual 96.3%1:54.771Andrew Aquilante · fastest of 19 · top 5 within 3.1s2:14.413Andrew Aquilante · fastest of 15 · top 5 within 4.8s156.2Mark Boden-6.061squal -4.792s95.7%qual 96.0%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-4.015squal +14.989s97.1%qual 112.5%
26 rule changes (FF: 3, T1: 19, SM: 4)7 weight · 6 cars added · 3 engine · 2 induction · 2 suspension & brakes · 2 tyres & wheels · 1 aero · 2 wording · 1 othershowhide
  • 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
  • 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
  • T1 Request to classify the Porsche 928GTS/S4 in Touring 1 #26315cars added
  • 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 20182018-10-101:41.612Jonathon Kotyk · fastest of 22 · top 5 within 1.7s1:42.049Jonathon Kotyk · fastest of 22 · top 5 within 1.3s115.7Denny Renfrow1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s124.1Melvin David Kemper Jr-4.140squal -4.014s95.9%qual 96.0%1:39.970Kristofer Olson · fastest of 16 · top 5 within 3.8s1:41.125Kristofer Olson · fastest of 15 · top 5 within 3.0s108.6Brad McCall-0.924squal -1.642s99.1%qual 98.4%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+13.229squal +12.743s113.0%qual 112.5%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:44.601Zach Holden · fastest of 36 · top 5 within 1.2s1:44.524Jonathon Kotyk · fastest of 36 · top 5 within 0.5s1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s-3.378squal -3.370s96.8%qual 96.8%1:41.793Andrew Aquilante · fastest of 22 · top 5 within 2.9s1:42.871Andrew Aquilante · fastest of 21 · top 5 within 2.9s-1.653squal -2.808s98.4%qual 97.3%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+14.576squal +13.705s113.9%qual 113.1%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:29.213Neil Verhagen · fastest of 14 · top 5 within 2.1s1:30.133Neil Verhagen · fastest of 14 · top 5 within 1.4s1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s-2.211squal -3.170s97.5%qual 96.4%1:28.656Ross Murray · fastest of 17 · top 5 within 1.4s1:29.309Ross Murray · fastest of 15 · top 5 within 1.1s-0.824squal -0.557s99.1%qual 99.4%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+10.631squal +11.301s111.8%qual 112.7%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:02.489Tim Kautz · fastest of 25 · top 5 within 1.1s2:03.383Rick Payne · fastest of 22 · top 5 within 0.8s1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s-5.354squal -4.685s95.7%qual 96.2%1:53.562Andrew Aquilante · fastest of 12 · top 5 within 2.5s1:55.494Andrew Aquilante · fastest of 12 · top 5 within 2.1s-7.889squal -8.927s93.6%qual 92.7%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+20.684squal +16.172s116.8%qual 113.2%

By track

TrackEvents Typical % of FF Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%Runoffs 2018
About this data
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of FF'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.