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FF vs AS vs FV 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)
vsAS×B-Spec+EP+FA+FC+FE2+FF×FP+vsFV×FX+GT1+GT2+GTX+HP+P+P2+SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 51 inactive classes
Series
Reference · what % is measured against, 12 events
Tracks · untick to narrow

Closest to the field: FF 100.0% of FF Rick Payne, Daytona International Speedway Runoffs 2015 race · AS 88.2% of FF James Jost, Virginia International Raceway Runoffs 2019 race · FV 98.4% of FF Zachary Whitston, Virginia International Raceway Runoffs 2019 race

1:402:002:202:4013 rule changes between Runoffs 2018 and Runoffs 201913 ▾26 rule changes between Runoffs 2019 and Runoffs 202026 ▾17 rule changes between Runoffs 2020 and Runoffs 202117 ▾13 rule changes between Runoffs 2021 and Runoffs 202213 ▾5 rule changes between Runoffs 2022 and Runoffs 20235 ▾15 rule changes between Runoffs 2023 and Runoffs 202415 ▾15 rule changes between Runoffs 2024 and Runoffs 202515 ▾15 rule changes between Runoffs 2025 and Runoffs 202615 ▾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)AS race best at Runoffs 2015: 2:02.922 (Andy McDermid)AS race best at Runoffs 2016: 1:33.424 (Edward Hosni)AS race best at Runoffs 2017: 1:51.507 (Bryan Long)AS race best at Runoffs 2018: 1:50.345 (John Heinricy)AS race best at Runoffs 2019: 2:03.900 (James Jost)AS race best at Runoffs 2020: 2:27.668 (Gregory Eaton)AS race best at Runoffs 2021: 1:50.606 (Gregory Eaton)AS race best at Runoffs 2022: 2:04.578 (Gregory Eaton)AS race best at Runoffs 2023: 2:04.120 (Gregory Eaton)AS race best at Runoffs 2024: 2:26.429 (Gregory Eaton)AS race best at Runoffs 2025: 2:29.232 (Gregory Eaton)AS race best at Runoffs 2026: 2:28.471 (Andrew McDermid)AS qualifying best at Runoffs 2015: 2:01.746 (Tom Sloe)AS qualifying best at Runoffs 2016: 1:30.651 (Tom Sloe)AS qualifying best at Runoffs 2017: 1:45.220 (James Jost)AS qualifying best at Runoffs 2018: 1:47.782 (Andrew McDermid)AS qualifying best at Runoffs 2019: 2:02.938 (Gregory Eaton)AS qualifying best at Runoffs 2020: 2:27.045 (Gregory Eaton)AS qualifying best at Runoffs 2021: 1:50.427 (Drew Cattell)AS qualifying best at Runoffs 2022: 2:02.162 (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 2:03.082 (Daniel Richardson)AS qualifying best at Runoffs 2024: 2:26.578 (Gregory Eaton)AS qualifying best at Runoffs 2025: 2:26.792 (Andrew McDermid)AS qualifying best at Runoffs 2026: 2:26.911 (Andrew McDermid)FV race best at Runoffs 2015: 2:21.142 (Andrew Whitston)FV race best at Runoffs 2016: 1:38.066 (Flinn Lazier)FV race best at Runoffs 2017: 1:55.923 (Michael Varacins)FV race best at Runoffs 2018: 1:53.639 (Alex Scaler)FV race best at Runoffs 2019: 2:18.289 (Zachary Whitston)FV race best at Runoffs 2020: 2:45.816 (Alex Scaler)FV race best at Runoffs 2021: 1:57.234 (Alex Scaler)FV race best at Runoffs 2022: 2:18.093 (Andrew Whitston)FV race best at Runoffs 2023: 2:16.611 (Andrew Abbott)FV race best at Runoffs 2024: 2:44.834 (Andrew Abbott)FV race best at Runoffs 2025: 2:46.736 (Zachary Whitston)FV race best at Runoffs 2026: 2:45.272 (Brian Farnham)FV qualifying best at Runoffs 2015: 2:21.167 (Roger Siebenaler)FV qualifying best at Runoffs 2016: 1:37.942 (Alex Scaler)FV qualifying best at Runoffs 2017: 1:55.759 (Michael Varacins)FV qualifying best at Runoffs 2018: 1:52.637 (Skip Streets)FV qualifying best at Runoffs 2019: 2:15.712 (Andrew Whitston)FV qualifying best at Runoffs 2020: 2:43.994 (Hunter Phelps-Barron)FV qualifying best at Runoffs 2021: 1:57.479 (Andrew Whitston)FV qualifying best at Runoffs 2022: 2:15.116 (Brian Farnham)FV qualifying best at Runoffs 2023: 2:15.639 (Andrew Whitston)FV qualifying best at Runoffs 2024: 2:42.643 (Andrew Whitston)FV qualifying best at Runoffs 2025: 2:44.101 (Andrew Abbott)FV qualifying best at Runoffs 2026: 2:46.536 (Zachary Whitston)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
FFASFVsolid race · dashed qualifying · slower is lower
95%100%105%110%115%13 rule changes between Runoffs 2018 and Runoffs 201913 ▾26 rule changes between Runoffs 2019 and Runoffs 202026 ▾17 rule changes between Runoffs 2020 and Runoffs 202117 ▾13 rule changes between Runoffs 2021 and Runoffs 202213 ▾5 rule changes between Runoffs 2022 and Runoffs 20235 ▾15 rule changes between Runoffs 2023 and Runoffs 202415 ▾15 rule changes between Runoffs 2024 and Runoffs 202515 ▾15 rule changes between Runoffs 2025 and Runoffs 202615 ▾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)AS race best at Runoffs 2015: 99.6% of FF's (Andy McDermid)AS race best at Runoffs 2016: 103.7% of FF's (Edward Hosni)AS race best at Runoffs 2017: 106.7% of FF's (Bryan Long)AS race best at Runoffs 2018: 108.1% of FF's (John Heinricy)Off the chart: AS race best at Runoffs 2019: 88.2% of FF's (James Jost)AS race best at Runoffs 2020: 102.4% of FF's (Gregory Eaton)AS race best at Runoffs 2021: 95.6% of FF's (Gregory Eaton)Off the chart: AS race best at Runoffs 2022: 90.0% of FF's (Gregory Eaton)AS race best at Runoffs 2023: 102.9% of FF's (Gregory Eaton)AS race best at Runoffs 2024: 103.1% of FF's (Gregory Eaton)AS race best at Runoffs 2025: 102.5% of FF's (Gregory Eaton)AS race best at Runoffs 2026: 103.3% of FF's (Andrew McDermid)AS qualifying best at Runoffs 2015: 99.4% of FF's (Tom Sloe)AS qualifying best at Runoffs 2016: 101.6% of FF's (Tom Sloe)AS qualifying best at Runoffs 2017: 100.6% of FF's (James Jost)AS qualifying best at Runoffs 2018: 106.1% of FF's (Andrew McDermid)AS qualifying best at Runoffs 2019: 102.8% of FF's (Gregory Eaton)AS qualifying best at Runoffs 2020: 102.9% of FF's (Gregory Eaton)AS qualifying best at Runoffs 2021: 105.8% of FF's (Drew Cattell)AS qualifying best at Runoffs 2022: 102.5% of FF's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 103.2% of FF's (Daniel Richardson)AS qualifying best at Runoffs 2024: 102.8% of FF's (Gregory Eaton)AS qualifying best at Runoffs 2025: 101.3% of FF's (Andrew McDermid)AS qualifying best at Runoffs 2026: 102.7% of FF's (Andrew McDermid)FV race best at Runoffs 2015: 114.4% of FF's (Andrew Whitston)FV race best at Runoffs 2016: 108.8% of FF's (Flinn Lazier)FV race best at Runoffs 2017: 110.9% of FF's (Michael Varacins)FV race best at Runoffs 2018: 111.4% of FF's (Alex Scaler)FV race best at Runoffs 2019: 98.4% of FF's (Zachary Whitston)FV race best at Runoffs 2020: 114.9% of FF's (Alex Scaler)FV race best at Runoffs 2021: 101.3% of FF's (Alex Scaler)FV race best at Runoffs 2022: 99.8% of FF's (Andrew Whitston)FV race best at Runoffs 2023: 113.3% of FF's (Andrew Abbott)FV race best at Runoffs 2024: 116.0% of FF's (Andrew Abbott)FV race best at Runoffs 2025: 114.6% of FF's (Zachary Whitston)FV race best at Runoffs 2026: 115.0% of FF's (Brian Farnham)FV qualifying best at Runoffs 2015: 115.2% of FF's (Roger Siebenaler)FV qualifying best at Runoffs 2016: 109.8% of FF's (Alex Scaler)FV qualifying best at Runoffs 2017: 110.7% of FF's (Michael Varacins)FV qualifying best at Runoffs 2018: 110.9% of FF's (Skip Streets)FV qualifying best at Runoffs 2019: 113.5% of FF's (Andrew Whitston)FV qualifying best at Runoffs 2020: 114.7% of FF's (Hunter Phelps-Barron)FV qualifying best at Runoffs 2021: 112.6% of FF's (Andrew Whitston)FV qualifying best at Runoffs 2022: 113.3% of FF's (Brian Farnham)FV qualifying best at Runoffs 2023: 113.7% of FF's (Andrew Whitston)FV qualifying best at Runoffs 2024: 114.1% of FF's (Andrew Whitston)FV qualifying best at Runoffs 2025: 113.2% of FF's (Andrew Abbott)FV qualifying best at Runoffs 2026: 116.4% of FF's (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
FFASFVsolid 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
EventFFASFV
Qual best Race best Trap 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%)2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)151.0Andrew McDermid-0.6 mph (-0.4%)+4.785squal +3.864s103.3%qual 102.7%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%)+21.586squal +23.489s115.0%qual 116.4%
15 rule changes (FF: 2, AS: 13)5 weight · 4 engine · 3 tyres & wheels · 1 induction · 1 removed · 1 othershowhide
  • AS 2016+ Camaro Spec Line Full Prep #39646tyres & wheels
  • AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheels
  • AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094other
  • AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239weight
  • AS Errors and Omissions #40532weight
  • FF Clarification in FF Kent 1600 Compression Ratio Paragraph #40293engine
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • FF Formula F Alternative Tire Rule Proposed Clarifications #39281tyres & wheels
  • AS 1994 Mustang Spec Line Request #39104engine
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
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%)2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)151.5Andrew McDermid+1.9 mph (+1.3%)+3.691squal +1.887s102.5%qual 101.3%2:44.101Andrew Abbott · fastest of 34 · top 5 within 1.3s+1.458s (+0.90%)2:46.736Zachary Whitston · fastest of 29 · top 5 within 0.6s+1.902s (+1.15%)117.2Zachary Whitston+0.7 mph (+0.6%)+21.195squal +19.196s114.6%qual 113.2%
15 rule changes (FF: 4, AS: 11)5 engine · 5 weight · 2 induction · 2 tyres & wheels · 1 othershowhide
  • AS RE: Previous Letter 37695 Update #38245weight -75 lbs
  • AS Errors and Omissions #38234engine
  • AS Errors and Omission #38055induction
  • AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197engine
  • FF Page 228, FF tire rule 9.1.1.10.e #38251tyres & wheels
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • AS Race memo #37902engine
  • FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change #37802tyres & wheels
  • AS Increase Coyote Engine Restrictor to 80mm #36177induction
  • AS Performance Pack for 2015+ Mustang #36867weight
  • AS Gear Ratios #37131engine
  • AS ECU specs for LS engine #37208engine
  • 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%)2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)149.6Gregory Eaton+0.4 mph (+0.3%)+4.372squal +4.026s103.1%qual 102.8%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%)+22.777squal +20.091s116.0%qual 114.1%
15 rule changes (FF: 2, AS: 11, FV: 2)6 cars added · 2 engine · 2 tyres & wheels · 1 suspension & brakes · 4 othershowhide
  • FF Update to FF EGR Blanking Plate Rule #36633engine
  • FV Disc Brakes #36822suspension & brakes
  • AS Mustang transmission ratios #36662engine
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • AS 6th gen Camaro limited prep #35733cars added
  • AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars added
  • AS Full Prep Head #35891other
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars added
  • AS Fuel Cell 12 #34194other
  • AS Please Classify the 6th Gen Into AS. #35448cars added
  • AS spec lines #35713cars added
  • FF Honda Fit Oversize Piston Rings #35305other
  • FV FV Wheel Bearing Clarification #35150tyres & wheels
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%)2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)154.6James Jost+3.7 mph (+2.5%)+3.537squal +3.833s102.9%qual 103.2%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%)+16.028squal +16.390s113.3%qual 113.7%
5 rule changes (FF: 1, AS: 4)3 engine · 1 suspension & brakes · 1 tyres & wheelsshowhide
  • AS Crate Motor Part Numbers #32944engine
  • AS Request wheel size change #33007tyres & wheels
  • AS Alternative Upper Front Control Arms for Dodge Challenger #33352engine
  • AS Front Brake Caliper Adapters for Dodge Challenger #33353suspension & brakes
  • FF Add Fast Forward Part Numbers for Honda Fit Engine #33752engine
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%)2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)150.9James Jost-3.0 mph (-2.0%)-13.780squal +2.947s90.0%qual 102.5%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%)-0.265squal +15.901s99.8%qual 113.3%
13 rule changes (AS: 9, FV: 4)6 weight · 1 engine · 1 suspension & brakes · 2 wording · 3 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • 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
  • AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295other
  • AS specification line consolidation and correction #31846wording
  • AS correction of SMG specification line #31847suspension & brakes
  • AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engine
  • FV Update direct replacement connecting rod information #31843weight
  • FV Formula V Connecting Rod Replacement #31448weight
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
Indianapolis Motor Speedway Runoffs 20212021-09-251:44.359Jonathan 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 Sheppard1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)153.8James Jost-5.070squal +6.068s95.6%qual 105.8%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+1.558squal +13.120s101.3%qual 112.6%
17 rule changes (FF: 3, AS: 14)6 weight · 5 engine · 3 cars added · 3 wordingshowhide
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428cars added
  • AS American Sedan Transmission Rule Change Request #30595weight
  • AS Correction to specifications inadvertently deleted #30691wording
  • AS weight adjustments #30700weight +50 lbs
  • FF Kent crankshaft clarification #30426wording
  • AS AS Mustang LP 4.6 3V Classification Transmission Request #29886weight
  • AS Request CF driveshaft on CTS-V for durability improvement #30117engine
  • AS Adjustment to model years of 5th generation RP Camaro #30348engine
  • AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars added
  • AS Request Trunk lid / Rear Hatch clarification #29591wording
  • AS Common Weight for CTS-V Tire #29759weight
  • AS Correction to specifications inadvertently deleted #30041cars added
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
  • FF Allow Optional Coolant Bleed Line to Correct a Known Problem #29673engine
  • FF Clarification regarding Honda LC1 ECU implementation date #29684engine
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 Bartz2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton+3.400squal +4.129s102.4%qual 102.9%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+21.548squal +21.078s114.9%qual 114.7%
26 rule changes (FF: 4, AS: 16, FV: 6)9 tyres & wheels · 6 engine · 2 cars added · 2 induction · 2 suspension & brakes · 2 weight · 1 aero · 2 othershowhide
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • FF Clarification regarding Honda LC1 ECU implementation #29135engine
  • AS Support for R-Type Specification Tires #27450tyres & wheels
  • AS Spec Tire Request #27519tyres & wheels
  • AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675induction
  • AS 2005-2009 Restricted Prep 4.6 3V #27908engine
  • AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engine
  • AS Request for Full Preparation Classification for 2010-2014 Camaro #28030other
  • AS Cylinder Heads #28696engine
  • AS Request for Max Rotor Diameter Change #28748suspension & brakes
  • AS Request increase rotor diameter #28797other
  • FV Support for Recommended Item - 4 bolt wheels in FV #29084tyres & wheels
  • FV Support for 4-bolt pattern wheels #28955 #29118tyres & wheels
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • FF E&O FF Kent Engine alternator language #28204engine
  • FF Honda Racing HPD low cost ECU proposal #27563engine
  • FF Update rain tire designation #28443tyres & wheels
  • FV Update rain tire designation #28444tyres & wheels
  • AS Rear Trailing Arms #28007suspension & brakes
  • AS Weight reduction for cars running iron heads #28010weight
  • AS 05-10 Mustang with HR cam classification #28226cars added
  • AS 10-15 Camaro Full Prep classification #28227cars added
  • 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
  • FV Clarification on Wheel Bolt Pattern #27603tyres & wheels
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 Ketchie2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost-16.574squal +3.375s88.2%qual 102.8%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-2.185squal +16.149s98.4%qual 113.5%
13 rule changes (FF: 3, AS: 4, FV: 6)2 engine · 2 induction · 2 suspension & brakes · 1 cars added · 1 tyres & wheels · 1 weight · 4 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • FV Allowed Modifications E&O #27398other
  • FV E&O Wheels #27230tyres & wheels
  • AS Request Ride Height Clarification #26598suspension & brakes
  • AS Request to Revert to 2017 Weights #25885weight
  • FV Exhaust termination rule E&O #26702other
  • FV E&O Dimensions #26674other
  • FV Request to clarify Disc Brake rules bearing retainer & weights #26262suspension & brakes
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • FF Request for Oversize Honda Fit Pistons #25810engine
  • FF Heat Shield - Fit Intake #26102induction
  • FF Request catch cans/tanks clarification #26158engine
  • FV FV Intake Manifold Clarification #26008induction
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 Renfrow1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi+8.296squal +6.170s108.1%qual 106.1%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+11.590squal +11.025s111.4%qual 110.9%
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 0.5s1:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s+6.983squal +0.619s106.7%qual 100.6%1:55.759Michael Varacins · fastest of 39 · top 5 within 1.0s1:55.923Michael Varacins · fastest of 32 · top 5 within 1.3s+11.399squal +11.158s110.9%qual 110.7%
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 1.4s1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s+3.291squal +1.438s103.7%qual 101.6%1:37.942Alex Scaler · fastest of 41 · top 5 within 0.3s1:38.066Flinn Lazier · fastest of 38 · top 5 within 0.7s+7.933squal +8.729s108.8%qual 109.8%
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 0.8s2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s-0.461squal -0.743s99.6%qual 99.4%2:21.167Roger Siebenaler · fastest of 31 · top 5 within 0.8s2:21.142Andrew Whitston · fastest of 30 · top 5 within 1.1s+17.759squal +18.678s114.4%qual 115.2%

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.