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FP vs FF vs FX pace at every track

Lap times across years say as much about the weather as the class. % of FP is each class's best lap as a share of FP'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)
AS+B-Spec+EP+FA+FC+FE2+vsFF×FP×FV+vsFX×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
Tracks · untick to narrow

Closest to the field: FP 100.0% of FP Kevin Ruck, Daytona International Speedway Runoffs 2015 race · FF 92.5% of FP Jonathon Kotyk, Indianapolis Motor Speedway Runoffs 2017 race · FX 82.4% of FP Vaughn Glace, Indianapolis Motor Speedway Runoffs 2021 race

1:402:002:202:4012 rule changes between Runoffs 2018 and Runoffs 201912 ▾29 rule changes between Runoffs 2019 and Runoffs 202029 ▾29 rule changes between Runoffs 2020 and Runoffs 202129 ▾34 rule changes between Runoffs 2021 and Runoffs 202234 ▾10 rule changes between Runoffs 2022 and Runoffs 202310 ▾27 rule changes between Runoffs 2023 and Runoffs 202427 ▾22 rule changes between Runoffs 2024 and Runoffs 202522 ▾37 rule changes between Runoffs 2025 and Runoffs 202637 ▾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)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)FX race best at Runoffs 2020: 2:17.553 (Jacob Loomis)FX race best at Runoffs 2021: 1:38.833 (Vaughn Glace)FX race best at Runoffs 2022: 2:08.711 (Dimitrios Tsesmetzis)FX qualifying best at Runoffs 2020: 2:16.968 (Jacob Loomis)FX qualifying best at Runoffs 2021: 1:38.596 (Vaughn Glace)FX qualifying best at Runoffs 2022: 1:51.480 (Trevor A Russell)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
FPFFFXsolid race · dashed qualifying · slower is lower
88%90%92%94%96%98%100%12 rule changes between Runoffs 2018 and Runoffs 201912 ▾29 rule changes between Runoffs 2019 and Runoffs 202029 ▾29 rule changes between Runoffs 2020 and Runoffs 202129 ▾34 rule changes between Runoffs 2021 and Runoffs 202234 ▾10 rule changes between Runoffs 2022 and Runoffs 202310 ▾27 rule changes between Runoffs 2023 and Runoffs 202427 ▾22 rule changes between Runoffs 2024 and Runoffs 202522 ▾37 rule changes between Runoffs 2025 and Runoffs 202637 ▾FP race best at Runoffs 2015: 100.0% of FP's (Kevin Ruck)FP race best at Runoffs 2016: 100.0% of FP's (John Walker)FP race best at Runoffs 2017: 100.0% of FP's (Eric Prill)FP race best at Runoffs 2018: 100.0% of FP's (Joe Huffaker)FP race best at Runoffs 2019: 100.0% of FP's (Eric Prill)FP race best at Runoffs 2020: 100.0% of FP's (Kevin Ruck)FP race best at Runoffs 2021: 100.0% of FP's (Cliff Ira)FP race best at Runoffs 2022: 100.0% of FP's (Mason Workman)FP race best at Runoffs 2023: 100.0% of FP's (Cliff Ira)FP race best at Runoffs 2024: 100.0% of FP's (Kevin Ruck)FP race best at Runoffs 2025: 100.0% of FP's (Chris Bovis)FP race best at Runoffs 2026: 100.0% of FP's (David Strittmatter)FP qualifying best at Runoffs 2015: 100.0% of FP's (Kevin Ruck)FP qualifying best at Runoffs 2016: 100.0% of FP's (John Walker)FP qualifying best at Runoffs 2017: 100.0% of FP's (Eric Prill)FP qualifying best at Runoffs 2018: 100.0% of FP's (Joe Huffaker)FP qualifying best at Runoffs 2019: 100.0% of FP's (Eric Prill)FP qualifying best at Runoffs 2020: 100.0% of FP's (Ethan Shippert)FP qualifying best at Runoffs 2021: 100.0% of FP's (Craig Chima)FP qualifying best at Runoffs 2022: 100.0% of FP's (Eric Prill)FP qualifying best at Runoffs 2023: 100.0% of FP's (Cliff Ira)FP qualifying best at Runoffs 2024: 100.0% of FP's (Cliff Ira)FP qualifying best at Runoffs 2025: 100.0% of FP's (David Strittmatter)FP qualifying best at Runoffs 2026: 100.0% of FP's (Stephen Simonds)FF race best at Runoffs 2015: 93.2% of FP's (Rick Payne)FF race best at Runoffs 2016: 93.5% of FP's (Neil Verhagen)FF race best at Runoffs 2017: 92.5% of FP's (Jonathon Kotyk)FF race best at Runoffs 2018: 94.1% of FP's (Jonathon Kotyk)Off the chart: FF race best at Runoffs 2019: 109.7% of FP's (Jonathan Kotyk)FF race best at Runoffs 2020: 93.7% of FP's (Jeffrey Bartz)FF race best at Runoffs 2021: 96.5% of FP's (Jonathan Kotyk)FF race best at Runoffs 2022: 100.5% of FP's (Jonathan Kotyk)FF race best at Runoffs 2023: 94.4% of FP's (Jonathan Kotyk)FF race best at Runoffs 2024: 92.7% of FP's (Sebastian Mateo Naranjo)FF race best at Runoffs 2025: 94.3% of FP's (Calvin Kautz)FF race best at Runoffs 2026: 93.8% of FP's (Nathan Down)FF qualifying best at Runoffs 2015: 93.5% of FP's (Tim Kautz)FF qualifying best at Runoffs 2016: 93.0% of FP's (Neil Verhagen)FF qualifying best at Runoffs 2017: 93.3% of FP's (Zach Holden)FF qualifying best at Runoffs 2018: 94.4% of FP's (Jonathon Kotyk)FF qualifying best at Runoffs 2019: 93.8% of FP's (Tyler O'Connor)FF qualifying best at Runoffs 2020: 94.4% of FP's (Simon Sikes)FF qualifying best at Runoffs 2021: 93.9% of FP's (Jonathan Kotyk)FF qualifying best at Runoffs 2022: 94.5% of FP's (Jonathan Kotyk)FF qualifying best at Runoffs 2023: 93.0% of FP's (Nolan Allaer)FF qualifying best at Runoffs 2024: 93.6% of FP's (Calvin Kautz)FF qualifying best at Runoffs 2025: 95.1% of FP's (Jonathan Kotyk)FF qualifying best at Runoffs 2026: 93.3% of FP's (David Ybarra)FX race best at Runoffs 2020: 89.3% of FP's (Jacob Loomis)Off the chart: FX race best at Runoffs 2021: 82.4% of FP's (Vaughn Glace)FX race best at Runoffs 2022: 93.5% of FP's (Dimitrios Tsesmetzis)FX qualifying best at Runoffs 2020: 90.5% of FP's (Jacob Loomis)FX qualifying best at Runoffs 2021: 88.8% of FP's (Vaughn Glace)FX qualifying best at Runoffs 2022: 88.3% of FP's (Trevor A Russell)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
FPFFFXsolid race · dashed qualifying · each class's best lap as a share of FP's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFPFFFX
Qual best Race best Trap Qual best Race best Trap vs FP % of FP Qual best Race best Trap vs FP % of FP 
Road America Runoffs 20262026-09-282:33.275Stephen 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%)2:23.047David 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%)-9.554squal -10.228s93.8%qual 93.3%
37 rule changes (FP: 34, FF: 2, FX: 1)11 engine · 10 weight · 7 induction · 2 cars added · 2 tyres & wheels · 1 suspension & brakes · 4 wordingshowhide
  • FP Mini Cooper Compression Ratio #40517engine
  • FX Update sealed engine teardown section #40622engine
  • 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
  • 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
  • FP Correct Valve Sizes on FP Fiat x19 1300 and 1500 #39850engine
  • FP Dual Carburetor Adjustments #39851induction
  • FP Request Toyota 5E Series Engines #38208engine
  • FP Request for Toyota 4E Series Engines #38209engine
  • FP Dual Carbs for the Fiat X1/9 #39593induction
  • FF Formula F Alternative Tire Rule Proposed Clarifications #39281tyres & wheels
  • 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
  • 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 20252025-09-292:32.395David 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%)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%)-8.730squal -7.490s94.3%qual 95.1%
22 rule changes (FP: 17, FF: 4, FX: 1)10 weight · 4 induction · 2 cars added · 2 tyres & wheels · 1 engine · 3 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
  • FF Page 228, FF tire rule 9.1.1.10.e #38251tyres & wheels
  • FP Request for Classification of Chevrolet Spark #37755cars added
  • FP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • 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
  • FP Effective date for Jan 2025 GCR updates #37654induction
  • 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
  • FX Request to Change to Weight for Ligier JS F422 #37124weight -15 lbs
  • 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 20242024-10-012:32.327Cliff 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%)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%)-11.189squal -9.775s92.7%qual 93.6%
27 rule changes (FP: 21, FF: 2, FX: 4)10 weight · 3 engine · 3 induction · 2 cars added · 1 tyres & wheels · 3 wording · 5 othershowhide
  • FF Update to FF EGR Blanking Plate Rule #36633engine
  • FP Errors/emissions Honda Civic/CRX #36700wording
  • FP Errant entry in HP production line item #36231other
  • FX Adjust minimum weights to align with pro F4 rules #36221weight -15 lbs
  • 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
  • FX Add Classification for 2nd Gen Ligier JS F422 #35844other
  • FP GCR Correction - Redundant HP Spec Lines #35623engine
  • FP Update FP Protege (01-03) Model Info #35715other
  • FX Clarify Formula 4 Rules in FX #35700tyres & wheels
  • FP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • 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
  • FP Porsche 944/924S Rule Change Request #35002weight
  • FP FP and HP Toyota Corolla #35030weight -43 lbs
  • FP Triumph GT6 Adjustments #35054weight -30 lbs
  • FX FM Rules Update #34841other
Virginia International Raceway Runoffs 20232023-09-232:08.248Cliff 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%)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%)-7.204squal -8.999s94.4%qual 93.0%
10 rule changes (FP: 6, FF: 1, FX: 3)2 cars added · 2 induction · 2 weight · 1 engine · 3 othershowhide
  • FP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • FP ITC to FP? #34286other
  • FP Request to Classify Sonic and Fiesta in HP #34264cars added
  • FX USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC #34329weight
  • FP Classification Request for 1978 Toyota Celica #34097cars added
  • FF Add Fast Forward Part Numbers for Honda Fit Engine #33752engine
  • FP Request to Add Mazda Protege P5 to FP #33664other
  • FX E&O - Remove references to FB and FM in GCR section 1.4.2.D #33725other
  • FP Review Limited Prep Port Matching Rules #33600induction
  • FX Reclassify 2010-2017 Formula Renault 2.0 as a spec line car in FA #33395weight
Virginia International Raceway Runoffs 20222022-09-242:06.217Eric 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%)1:59.215Jonathan 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%)+0.717squal -7.002s100.5%qual 94.5%1:51.480Trevor A Russell · fastest of 5 · top 5 within 9.7s2:08.711Dimitrios Tsesmetzis · fastest of 4 · top 4 within 6.8s137.2Trevor A Russell-8.930squal -14.737s93.5%qual 88.3%
34 rule changes (FP: 25, FX: 9)10 induction · 6 engine · 6 tyres & wheels · 5 weight · 4 cars added · 1 wording · 2 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
  • FX Pro Formula F2000/USF2000 Transmission E&O #32823weight
  • FX Formula Mazda Minimum Weight #33010weight
  • FX Formula Mazda Spec Line E&O Corrections #33011engine
  • FX Formula Renault 2.0 (10-17) Intake Restrictor #32745induction
  • FX Allow Performance Electronics PE3-8400 for USF2000 MZR #32767engine
  • FP Subaru BRZ Model Years #32500other
  • 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
  • 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
  • FP Throttle Body and Idle Air #31800induction
  • FX FM Rule Set Clarification #31881tyres & wheels
  • FX E&O F4 Tires #31940tyres & wheels
  • FX E&O USF2000 Tube Frame #31951tyres & wheels
  • FX URGENT - FX- Formula Renault Tire #32058tyres & wheels
  • 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
  • FP E&O; MR2 Track #31120wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:51.082Craig 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 Ira1:44.359Jonathan 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-4.257squal -6.723s96.5%qual 93.9%1:38.596Vaughn Glace · fastest of 15 · top 5 within 4.1s1:38.833Vaughn Glace · fastest of 15 · top 5 within 4.3s138.6Vaughn Glace-21.100squal -12.486s82.4%qual 88.8%
29 rule changes (FP: 21, FF: 3, FX: 5)9 cars added · 7 weight · 5 engine · 2 induction · 2 suspension & brakes · 2 tyres & wheels · 1 wording · 1 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
  • FX Rules Adjustment #30950tyres & wheels
  • 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
  • FP Move Porsche 924 in Level 1 Prep From EP to FP #30135cars added
  • FP Clarify Application of Percentage Based Weight Penalties #30669weight
  • FX FX/FRP Tire Rule #30723tyres & wheels
  • FP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • FP Fiat X1/9 brake rotors #30423suspension & brakes
  • FX Classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000 #30460cars added
  • FF Kent crankshaft clarification #30426wording
  • FP Please Classify Mazda3 in FP #30165cars added
  • FP Golf MkIII Valve Size Request #30268engine
  • FP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • FP Request VW weight break #29963weight -50 lbs
  • FX Request for Car Classification to Compete in Formula X #29933cars added
  • 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
  • FX Update specifications for FormulaSPEED cars #29674induction
Road America Runoffs 20202020-10-022:31.414Ethan Shippert · fastest of 23 · top 5 within 2.2s2:34.033Kevin Ruck · fastest of 21 · top 5 within 2.3s133.2Sam Henry2:22.916Simon Sikes · fastest of 14 · top 5 within 1.6s2:24.268Jeffrey Bartz · fastest of 14 · top 5 within 0.4s138.1Jeffrey Bartz-9.765squal -8.498s93.7%qual 94.4%2:16.968Jacob Loomis · fastest of 12 · top 5 within 2.7s2:17.553Jacob Loomis · fastest of 11 · top 5 within 3.5s139.3Brad Drew-16.480squal -14.446s89.3%qual 90.5%
29 rule changes (FP: 19, FF: 4, FX: 6)8 cars added · 7 engine · 5 induction · 3 tyres & wheels · 3 weight · 2 wording · 1 othershowhide
  • FP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • FX Follow up to to Letter#28991 Request for FX classification #29281cars added
  • FF Clarification regarding Honda LC1 ECU implementation #29135engine
  • FP EP BMW Z3 Rule Clarification #28998engine
  • FP Request to Classify Porsche 911 2.0L #28456cars added
  • FP Request to change to Carburetor Spec Line 84-87 Mazda 626 #28926induction
  • FX Request to be added to FX group #28991other
  • FP BMW Cylinder Head Casting and Part Numbers #28708engine
  • FP Correct Scirocco Spec line E&O #28892weight
  • FP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • FP Error in Mini Cooper Spec Line #28713wording
  • 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
  • FX Request to classify FSV in FX #28057cars added
  • FX Classify FormulaSPEED in FX #28715cars added
  • 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
  • FX Request to remove tire marking language from FM #28415tyres & wheels
  • FP Request for Help for Datsun 1200 #27934induction
  • FX Change to FX Table 1 #28322induction
  • 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 20192019-10-052:07.436Eric Prill · fastest of 19 · top 5 within 0.6s2:08.076Eric Prill · fastest of 18 · top 5 within 0.8s131.4Ken Kannard1:59.563Tyler O'Connor · fastest of 14 · top 5 within 1.4s2:20.474Jonathan Kotyk · fastest of 14 · top 5 within 6.3s136.2Derek Ketchie+12.398squal -7.873s109.7%qual 93.8%
12 rule changes (FP: 9, FF: 3)3 induction · 2 engine · 1 cars added · 1 suspension & brakes · 1 tyres & wheels · 1 weight · 1 wording · 2 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
  • FP Request Miata Eligibility - 2003 #27121other
  • FP Rollcenter Correction Clarification #25873tyres & wheels
  • FP Hardtops #26476wording
  • FP Request Classification of Dodge Daytona in F Production #26259weight -150 lbs
  • FF Request for Oversize Honda Fit Pistons #25810engine
  • FF Heat Shield - Fit Intake #26102induction
  • FF Request catch cans/tanks clarification #26158engine
Sonoma Raceway Runoffs 20182018-10-101:47.588Joe Huffaker · fastest of 15 · top 5 within 3.0s1:48.481Joe Huffaker · fastest of 14 · top 5 within 2.2s109.1Joe Huffaker1:41.612Jonathon Kotyk · fastest of 22 · top 5 within 1.7s1:42.049Jonathon Kotyk · fastest of 22 · top 5 within 1.3s115.7Denny Renfrow-6.432squal -5.976s94.1%qual 94.4%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:52.091Eric Prill · fastest of 42 · top 5 within 1.2s1:53.007Eric Prill · fastest of 40 · top 5 within 0.7s1:44.601Zach Holden · fastest of 36 · top 5 within 1.2s1:44.524Jonathon Kotyk · fastest of 36 · top 5 within 0.5s-8.483squal -7.490s92.5%qual 93.3%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:35.938John Walker · fastest of 33 · top 5 within 0.4s1:36.399John Walker · fastest of 27 · top 5 within 0.3s1:29.213Neil Verhagen · fastest of 14 · top 5 within 2.1s1:30.133Neil Verhagen · fastest of 14 · top 5 within 1.4s-6.266squal -6.725s93.5%qual 93.0%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:11.009Kevin Ruck · fastest of 20 · top 5 within 1.6s2:12.419Kevin Ruck · fastest of 18 · top 5 within 1.1s2:02.489Tim Kautz · fastest of 25 · top 5 within 1.1s2:03.383Rick Payne · fastest of 22 · top 5 within 0.8s-9.036squal -8.520s93.2%qual 93.5%

By track

TrackEvents Typical % of FP 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 FP'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.