BoP Lab / Classes / FP

FP vs FM vs FA vs FB 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: remove one to add another)

ASB-SpecEPvsFA ×vsFB ×FCFE2FFvsFM ×FP×FVFXGT1GT2GTXHPPP2SMSMXSRF3STLSTUT1T2T3T4Show 49 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against

Tracks · untick to narrow Auto Club Speedway Barber Motorsports Park Blackhawk Farms Raceway Buttonwillow Raceway Park Circuit of St. Louis (formerly Gateway Motorsports Circuit of the Americas Daytona International Speedway Grattan Raceway Hallett Motor Racing Circuit Homestead-Miami Speedway Indianapolis Motor Speedway Laguna Seca Michelin Raceway Road Atlanta Mid-Ohio Sports Car Course New Jersey Motorsports Park NOLA Motorsports Park Pacific Raceways Pittsburgh International Race Complex Portland International Raceway Pueblo Motorsports Park Road America Sebring International Raceway Sonoma Raceway Summit Point Raceway Thunderhill Raceway Park Virginia International Raceway Watkins Glen International Willow Springs Raceway World Wide Technology Raceway

Closest to the field: FP 100.0% of FP Kevin Ruck, Daytona International Speedway Runoffs 2015 race · FM 89.1% of FP Joseph Burton-Harris, Daytona International Speedway Runoffs 2015 race · FA 75.6% of FP James French, Indianapolis Motor Speedway Runoffs 2021 race · FB 82.4% of FP J R Osborne, Sonoma Raceway Runoffs 2018 qualifying

% of FPLap times

FPFMFAFBsolid race · dashed qualifying · slower is lower

FPFMFAFBsolid 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

	Event	FP			FM					FA					FB
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs FP	% of FP	Qual best	Race best	Trap	vs FP	% of FP	Qual best	Race best	Trap	vs FP	% of FP
	Road America Runoffs 20262026-09-28	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%)						2:02.513Dudley Fleck · fastest of 9 · top 5 within 6.9s+1.590s (+1.31%)	2:03.334James French · fastest of 10 · top 5 within 1.4s+0.680s (+0.55%)	158.6John McAleer+1.5 mph (+1.0%)	-29.906squal -30.762s	80.5%qual 79.9%
41 rule changes (FP: 34, FA: 7)11 engine · 11 weight · 10 induction · 2 cars added · 1 suspension & brakes · 1 tyres & wheels · 4 wording · 1 othershowhide 2026-08-01 FA Update sealed engine teardown section #40621engine 2026-08-01 FP Mini Cooper Compression Ratio #40517engine 2026-07-01 FP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine 2026-07-01 FP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction 2026-07-01 FP HP Honda Civic (92-95) #40464weight -70 lbs 2026-06-01 FA Motor Classification #40175weight 2026-05-01 FP Miata track width - errors and omissions #39976wording 2026-05-01 FP GCR Spec Line Correction #39977induction 2026-05-01 FP CGR Spec Line Weight Correction #39978weight 2026-05-01 FP Triumph GT6 Spec Change. #40098induction 2026-05-01 FP Request to Classify BMW E21 320i #40110cars added 2026-05-01 FP BMW 318is 84-85 engine displacement correction #40116engine 2026-03-01 FP Correct Valve Sizes on FP Fiat x19 1300 and 1500 #39850engine 2026-03-01 FP Dual Carburetor Adjustments #39851induction 2026-02-01 FA Pro Mazda Classification and Performance Enhancement Proposal #39411induction 2026-02-01 FP Request Toyota 5E Series Engines #38208engine 2026-02-01 FP Request for Toyota 4E Series Engines #38209engine 2026-02-01 FP Dual Carbs for the Fiat X1/9 #39593induction 2026-01-01 FA Alternate Intake Manifold for MZR #38223induction 2026-01-01 FA Engine Compression Rule Change Request #39302engine 2026-01-01 FA Change Formula 1000 allowances #39608induction 2025-12-01 FP TR2 Notes E&O #39180weight 2025-12-01 FP Balance of Power #39187weight +50 lbs 2025-12-01 FP Competition Adjustment Request #39259weight -80 lbs 2025-12-01 FP Factory Roll Bar Removal on VW Convertible #39268wording 2025-12-01 FP FP Parity Request #39325weight +50 lbs 2025-12-01 FP Adjust former-GTL Honda's with B/D-Series Engines #39374engine 2025-11-01 FA Re-Consider USF Pro 2000 Car for Formula Atlantic Class #38783other 2025-11-01 FP Please Lower Weight of 280Z #38871weight -160 lbs 2025-11-01 FP Miata Weight Adjustment Follow Up #38949weight -25 lbs 2025-11-01 FP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs 2025-11-01 FP HP Volvo 142 spec omission #38994engine 2025-11-01 FP HP Mini DOHC 1.6 #38996engine 2025-11-01 FP 83-88 FP Scirocco Spec Line Creation #38997cars added 2025-11-01 FP Add to Rabbit description #39019wording 2025-11-01 FP Clean-up 9.1.5.E.7e #39025suspension & brakes 2025-11-01 FP Add TB size to Ford Mustang (94-98) Spec Line #39130induction 2025-11-01 FP Correct Existing VW Scirocco Spec Line #39140weight 2025-10-01 FP HP Plymouth Arrow spec omission #38995wording 2025-10-01 FP Add Wheel Diameter to Appendix G #39008tyres & wheels 2025-10-01 FP Add TB ID tolerance to general Prod rules #39009induction
	Road America Runoffs 20252025-09-29	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%)						2:00.923Hans Peter · fastest of 12 · top 5 within 2.4s-0.637s (-0.52%)	2:02.654Hans Peter · fastest of 11 · top 5 within 3.1s+0.864s (+0.71%)	157.0Shane Kennett-3.0 mph (-1.9%)	-31.617squal -31.472s	79.5%qual 79.3%
20 rule changes (FP: 17, FA: 3)7 weight · 4 induction · 3 cars added · 2 tyres & wheels · 1 engine · 3 othershowhide 2025-07-01 FA Ligier JS F3 Tire Choice #38434tyres & wheels 2025-07-01 FP BMW Z4 update #38490induction 2025-07-01 FP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs 2025-06-01 FP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs 2025-04-01 FP Request for Classification of Chevrolet Spark #37755cars added 2025-04-01 FP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs 2025-03-01 FA Update Formula Renault 2.0 spec line notes #37853tyres & wheels 2025-03-01 FP Request Competition Adjustment to BMW Z3 2.5L #37120induction 2025-03-01 FP FP Class Adjustments #37458weight 2025-03-01 FP Interpretation of Production Rules on Mirrors #37235other 2025-03-01 FP Weight Reduction for Honda S2000 #37466weight 2025-03-01 FP Mazda 1999 Miata 1.8L #37488weight -50 lbs 2025-03-01 FP Errors & Omissions #37648cars added 2025-03-01 FP GTL/FP consolidation 2025 Rules #37659induction 2025-02-21 FP Effective date for Jan 2025 GCR updates #37654induction 2025-02-01 FA Classify FR European Championship car as spec line car in Table 2 #37658cars added 2025-01-01 FP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs 2025-01-01 FP Fix Error in Spridget Spec Line #37437engine 2025-01-01 FP Create ruleset that allows GTL cars to run in FP #37485other 2024-11-01 FP 1275 HP Spridget Level 2 Only #36518other
	Road America Runoffs 20242024-10-01	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%)						2:01.560Hans Peter · fastest of 13 · top 5 within 2.0s-2.714s (-2.18%)	2:01.790Dudley Fleck · fastest of 12 · top 5 within 3.3s-2.956s (-2.37%)	160.0Brandon Schwarz+9.4 mph (+6.3%)	-31.456squal -30.767s	79.5%qual 79.8%
21 rule changes (FP: 21)9 weight · 3 induction · 2 cars added · 2 engine · 3 wording · 2 othershowhide 2024-10-01 FP Errors/emissions Honda Civic/CRX #36700wording 2024-08-01 FP Errant entry in HP production line item #36231other 2024-06-01 FP NIssan 300ZX Z31 to EP #35830cars added 2024-06-01 FP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added 2024-06-01 FP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording 2024-05-01 FP Request to Replace CRX Plastic Panels #35876wording 2024-05-01 FP FP data and parity #35896induction 2024-03-01 FP GCR Correction - Redundant HP Spec Lines #35623engine 2024-03-01 FP Update FP Protege (01-03) Model Info #35715other 2024-02-01 FP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight 2024-01-01 FP FP data #35060weight +25 lbs 2024-01-01 FP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs 2024-01-01 FP Corrections to Honda Spec Lines in FP #35250induction 2024-01-01 FP Miata Alternate Head #35253weight -50 lbs 2024-01-01 FP Triumph GT6 Adjustments #35255weight 2024-01-01 FP Honda S2000 throttle body #35272induction 2024-01-01 FP Correction within Triumph TR8 Spec Line #35315engine 2024-01-01 FP Correction to EP 924S/944 Spec Line #35317weight 2023-12-01 FP Porsche 944/924S Rule Change Request #35002weight 2023-12-01 FP FP and HP Toyota Corolla #35030weight -43 lbs 2023-12-01 FP Triumph GT6 Adjustments #35054weight -30 lbs
	Virginia International Raceway Runoffs 20232023-09-23	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%)
13 rule changes (FP: 6, FA: 7)4 induction · 2 cars added · 2 tyres & wheels · 1 engine · 1 weight · 3 othershowhide 2023-07-01 FP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction 2023-07-01 FP ITC to FP? #34286other 2023-06-01 FA Simplify Pro Formula Mazda wheel allowance #34190tyres & wheels 2023-06-01 FP Request to Classify Sonic and Fiesta in HP #34264cars added 2023-05-01 FA E&O - Correct Pro Formula Mazda spec line dimensional equivalent #34085tyres & wheels 2023-05-01 FA Add new spec line for MSR Formula Mazda FMzR to Table 2 #34139other 2023-05-01 FP Classification Request for 1978 Toyota Celica #34097cars added 2023-02-01 FP Request to Add Mazda Protege P5 to FP #33664other 2023-01-01 FA BDA Displacement #33431engine 2023-01-01 FP Review Limited Prep Port Matching Rules #33600induction 2022-12-01 FA Reclassify 2010-2017 Formula Renault 2.0 as a spec line car in FA #33395weight 2022-12-01 FA Change Swift 016 2.3L restrictor size and minimum weight #33472induction -30 lbs 2022-10-01 FA Pro Formula Mazda Dimension E&O #33160induction
	Virginia International Raceway Runoffs 20222022-09-24	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%)						1:44.703Chip Romer · fastest of 7 · top 5 within 4.0s+3.158s (+3.11%)	1:48.507Alex Mayer · fastest of 4 · top 4 within 4.2s+5.400s (+5.24%)	154.6Austin Hill-1.4 mph (-0.9%)	-29.134squal -21.514s	78.8%qual 83.0%
32 rule changes (FP: 25, FA: 7)9 induction · 7 engine · 4 cars added · 4 weight · 3 tyres & wheels · 1 aero · 1 wording · 3 othershowhide 2022-09-01 FP Request to classify VW New Beetle 2.5L in EP #32725cars added 2022-09-01 FP Request Rotary Injection on Dual Y manifold #32775engine 2022-09-01 FP Request for Corrado Stroke & Displacement Correction #32985engine 2022-06-01 FP Subaru BRZ Model Years #32500other 2022-05-01 FA Update FR Americas rulebook requirement #32491engine 2022-05-01 FA Clarify verification of sealed engine compliance #32522engine 2022-05-01 FA Clarify Formula Lites and FR Americas sealed engine requirement #32523engine 2022-05-01 FP Weight Adjustment of Lotus 7 #32213weight +50 lbs 2022-05-01 FP EP MX-5 Global Cup Car #32218weight 2022-05-01 FP Please Class BMW 128i in EP #32370cars added 2022-05-01 FP Inconsistency in Body Work Descriptions #32396other 2022-05-01 FP Request to classify the 1999-2000 Mazda Protege in FP #32398cars added 2022-04-01 FA E&O FA Transmission section #32251tyres & wheels 2022-04-01 FA E&O Swift 016 2.5 liter Aero column #32363aero 2022-04-01 FP Mazda RX8 with 13b Rotary #32170induction 2022-04-01 FP Request Idle control valve clarification #32178engine 2022-04-01 FP Correct FP BMW 325e/es Displacement #32394engine 2022-03-01 FA Closing the Gap #31934other 2022-03-01 FP EP Adjustments #31858induction 2022-03-01 FP 1999 3.8L Ford Mustang to EP? #31635weight 2022-03-01 FP Improved Touring Tires #32064tyres & wheels 2022-03-01 FP VW Golf Jetta 2.0L intake and exhaust size correction. #32173induction 2022-02-01 FA Reorganize Tables 1 and 2 #31985weight 2022-02-01 FP Throttle Body and Idle Air #31800induction 2022-01-01 FP Porsche 968 Engine Questions #31478induction 2022-01-01 FP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels 2022-01-01 FP BMW Z3 2.5L Spec Line #31724induction 2022-01-01 FP FP Del Sol VTEC #31859induction 2022-01-01 FP Standardize Level 2 Classifications in FP #31868induction 2021-12-01 FP 944S2 Restrictor #31396induction 2021-12-01 FP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added 2021-10-01 FP E&O; MR2 Track #31120wording
	Indianapolis Motor Speedway Runoffs 20212021-09-25	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						1:29.701James French · fastest of 18 · top 5 within 2.7s-0.256s (-0.28%)	1:30.650James French · fastest of 17 · top 5 within 6.1s-0.715s (-0.78%)	155.5James French	-29.283squal -21.381s	75.6%qual 80.8%
43 rule changes (FP: 21, FA: 22)13 weight · 9 engine · 8 cars added · 3 induction · 2 removed · 2 suspension & brakes · 1 tyres & wheels · 1 wording · 4 othershowhide 2021-09-01 FA E&O Table 2 engine names #31085engine 2021-08-01 FA Move Toyota 1800 to Table 2 #30822removed 2021-08-01 FA E&O Swift 016 wheel width reference #30939tyres & wheels 2021-08-01 FP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine 2021-08-01 FP Request a review of the S14 240SX in EP. #30873weight -200 lbs 2021-07-01 FA Update FA rules package #30717engine 2021-07-01 FA Move Mazda MZR/Ford Duratec 2296cc and 2500cc to Table 2 #30718removed 2021-07-01 FA Clean up Table 2 Mazda MZR 2.0L and Honda Civic K20Z3 spec lines #30719other 2021-07-01 FP Lotus/Caterham 7 America Request #30392engine 2021-07-01 FP Request to classify ITC Plymouth Arrow #30588cars added 2021-07-01 FP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added 2021-07-01 FP Fiat x1/9 Competition Adjustments #30711weight -50 lbs 2021-07-01 FP Reclassify Daimler SP 250 #30721cars added 2021-06-01 FA E&O Mazda MZR 2.0 and Honda Civic K20Z3 chassis eligibility #30632other 2021-06-01 FP Move Porsche 924 in Level 1 Prep From EP to FP #30135cars added 2021-06-01 FP Clarify Application of Percentage Based Weight Penalties #30669weight 2021-05-01 FA Correct engine name in Swift 016 2.3 liter spec line #30447engine 2021-05-01 FA Correct engine name in Swift 016 2.5 liter spec line #30448engine 2021-05-01 FA Revise Table 1 Spec Lines and clarify application of Engine Notes #30456engine 2021-05-01 FP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added 2021-05-01 FP Fiat X1/9 brake rotors #30423suspension & brakes 2021-04-01 FA Update Table 1 Weights for Spec Lines C, I, and K #30355weight -25 lbs 2021-04-01 FA Remove redundant reference in Table 2 spec line #30366weight 2021-04-01 FA Correct the name of the FR Americas car #30369wording 2021-04-01 FA Clean up Spec Line D in Table 1 #30372weight 2021-04-01 FA Table 2 Honda K20Z3 request #30386induction 2021-04-01 FP Please Classify Mazda3 in FP #30165cars added 2021-04-01 FP Golf MkIII Valve Size Request #30268engine 2021-03-01 FA E&O FA Intake Restrictors #30273induction 2021-03-01 FA Clean up Spec Lines A and B in Table 1 #30274weight 2021-03-01 FA Clean up Spec Line C in Table 1 #30275weight 2021-03-01 FA Clean up Spec Lines J and L in Table 1 #30276weight 2021-03-01 FA Move engine specifications to Pro Formula Mazda spec line notes #30278engine 2021-03-01 FA Update F3 Americas spec line #30280other 2021-01-01 FA Request to classify Formula Lites Crawford FL15 #29702cars added 2021-01-01 FP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes 2021-01-01 FP Request VW weight break #29963weight -50 lbs 2020-12-01 FP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs 2020-12-01 FP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction 2020-12-01 FP Weight Reduction for Datsun Roadster #29409weight -75 lbs 2020-12-01 FP EP TR8 Adjustment #29512weight -100 lbs 2020-12-01 FP Request to Classify 1996-2000 Honda Civic EX #29515cars added 2020-12-01 FP FAJS Carburetor #29576other
	Road America Runoffs 20202020-10-02	2:31.414Ethan Shippert · fastest of 23 · top 5 within 2.2s	2:34.033Kevin Ruck · fastest of 21 · top 5 within 2.3s	133.2Sam Henry						2:04.274Spencer Brockman · fastest of 11 · top 5 within 2.7s	2:04.746Spencer Brockman · fastest of 10 · top 5 within 2.4s	150.6Hans Peter	-29.287squal -27.140s	81.0%qual 82.1%
34 rule changes (FP: 19, FA: 15)8 engine · 6 induction · 5 cars added · 5 weight · 3 tyres & wheels · 1 aero · 1 removed · 2 wording · 3 othershowhide 2020-10-01 FP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels 2020-08-01 FP EP BMW Z3 Rule Clarification #28998engine 2020-07-01 FA Request to Adjust FB Weight for Stock Engines #29005weight 2020-07-01 FP Request to Classify Porsche 911 2.0L #28456cars added 2020-07-01 FP Request to change to Carburetor Spec Line 84-87 Mazda 626 #28926induction 2020-06-01 FA E&O permitted engine modifications #28831engine 2020-06-01 FA E&O Transmissions #28832other 2020-06-01 FA Swift 016 Gurney flap wicker clarification #28884aero 2020-06-01 FP BMW Cylinder Head Casting and Part Numbers #28708engine 2020-06-01 FP Correct Scirocco Spec line E&O #28892weight 2020-05-01 FA Remove redundant spec line in Table 1 #28720removed 2020-05-01 FA E&O general engine rules #28772engine 2020-05-01 FP Request to Classify 1990-1994 Mazda Protege #28381cars added 2020-05-01 FP Error in Mini Cooper Spec Line #28713wording 2020-04-01 FA Request higher compression ratio and prior weights for F1000 cars #28162engine 2020-04-01 FA Remove redundant wheel dimension provisions #28554tyres & wheels 2020-04-01 FA E&O Formula 3 spec line #28596induction 2020-04-01 FP Caterham 7 Spec Line #28498engine 2020-04-01 FP Request to classify SOHC 1989-90 240SX in F prod L2 #28553cars added 2020-03-01 FA FA weight correction/clarification #28430engine 2020-03-01 FP VW Weight and Valve Size Request #27886weight 2020-03-01 FP Request to allow 40 DCOE carb for the Datsun 510 #28195induction 2020-03-01 FP Request to classify Porsche 914 2L in LPrep FProd #28231cars added 2020-03-01 FP Request Ford Fiesta Weight Adjustment #28336weight 2020-02-01 FP Request for Help for Datsun 1200 #27934induction 2020-01-01 FA Request to merge FB into FA #25611weight 2020-01-01 FA Suggestions for FB/F1000 into FA #27319other 2020-01-01 FA Change Swift 016 - 2.3 liter Mazda Duratec restrictor size #27880induction 2020-01-01 FP Request to List Mazda Miata Throttle Body Size #27907induction 2020-01-01 FP Request to Classify 2001-2003 Mazda Protege ES in FP #27922cars added 2019-12-01 FA Move wheel dimensions from Bodywork subsection to #27493tyres & wheels 2019-12-01 FA Table 2 Mazda MZR 2.0 E&O #27640other 2019-12-01 FP Request to Correct Track of 1988-91 Honda Civic #27487wording 2019-12-01 FP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
	Virginia International Raceway Runoffs 20192019-10-05	2:07.436Eric Prill · fastest of 19 · top 5 within 0.6s	2:08.076Eric Prill · fastest of 18 · top 5 within 0.8s	131.4Ken Kannard	1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s	2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s	135.7Bryce Cornet	+7.740squal -12.312s	106.0%qual 90.3%	1:41.545Dario Cangialosi · fastest of 8 · top 5 within 2.8s	1:43.107Dario Cangialosi · fastest of 8 · top 5 within 1.8s	155.9Kent Vaccaro	-24.969squal -25.891s	80.5%qual 79.7%	1:54.469Pete Frost · only car	1:57.688Pete Frost · only car	145.9Pete Frost	-10.388squal -12.967s	91.9%qual 89.8%
16 rule changes (FP: 9, FA: 7)4 weight · 2 engine · 2 induction · 1 cars added · 1 removed · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 3 othershowhide 2019-10-01 FA Follow up to Letter #27344 on Honda Powered FA Rules #27363removed 2019-08-31 FA Swift 014 Mazda MZR 2.0 E&O #27305weight 2019-08-31 FP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other 2019-08-31 FP Request to classify the GMX5 2019 #27263cars added 2019-08-31 FP level one susp. component rule #27270suspension & brakes 2019-08-31 FP Clarification of Carb Rules - Prep 1 #27300induction 2019-08-31 FP Clarification of Carb Rules - Prep 2 #27301induction 2019-08-01 FP Request Miata Eligibility - 2003 #27121other 2019-05-31 FA Adjust Line N restrictor size and minimum weight #26691weight +30 lbs 2019-05-01 FA Add data plate requirement #26707other 2019-04-01 FP Rollcenter Correction Clarification #25873tyres & wheels 2019-04-01 FP Hardtops #26476wording 2019-03-01 FA Request to add FA engine spec lines #26183engine 2019-03-01 FP Request Classification of Dodge Daytona in F Production #26259weight -150 lbs 2019-02-01 FA FA MZR 2.0 Engine Specification #25814engine 2019-02-01 FA FA 016 weight increase #26063weight
	Sonoma Raceway Runoffs 20182018-10-10	1:47.588Joe Huffaker · fastest of 15 · top 5 within 3.0s	1:48.481Joe Huffaker · fastest of 14 · top 5 within 2.2s	109.1Joe Huffaker	1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s	1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s	124.1Melvin David Kemper Jr	-10.572squal -9.990s	90.3%qual 90.7%	1:28.176Mirl Swan · fastest of 7 · top 5 within 4.0s	1:29.924Mirl Swan · fastest of 7 · top 5 within 2.6s	144.8Antony Opheim	-18.557squal -19.412s	82.9%qual 82.0%	1:28.612J R Osborne · fastest of 7 · top 5 within 3.3s	1:31.189J R Osborne · fastest of 7 · top 5 within 3.7s	140.5J R Osborne	-17.292squal -18.976s	84.1%qual 82.4%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:52.091Eric Prill · fastest of 42 · top 5 within 1.2s	1:53.007Eric Prill · fastest of 40 · top 5 within 0.7s		1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s	1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s		-11.861squal -10.860s	89.5%qual 90.3%	1:29.957Sedat Yelkin · fastest of 12 · top 5 within 2.3s	1:31.365Keith Grant · fastest of 12 · top 5 within 1.0s		-21.642squal -22.134s	80.8%qual 80.3%	1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s	1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s		-19.305squal -18.345s	82.9%qual 83.6%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:35.938John Walker · fastest of 33 · top 5 within 0.4s	1:36.399John Walker · fastest of 27 · top 5 within 0.3s		1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s	1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s		-8.477squal -9.895s	91.2%qual 89.7%	1:14.920Ryan Norman · fastest of 5 · top 5 within 7.0s	1:19.009Ryan Norman · fastest of 5 · top 5 within 4.7s		-17.390squal -21.018s	82.0%qual 78.1%	1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s	1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s		-15.384squal -16.052s	84.0%qual 83.3%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	2:11.009Kevin Ruck · fastest of 20 · top 5 within 1.6s	2:12.419Kevin Ruck · fastest of 18 · top 5 within 1.1s		1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s	1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s		-14.390squal -13.205s	89.1%qual 89.9%	1:47.758Tyler Hunter · fastest of 10 · top 5 within 3.7s	1:48.162Tyler Hunter · fastest of 8 · top 5 within 5.3s		-24.257squal -23.251s	81.7%qual 82.3%	1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s	1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s		-20.803squal -20.298s	84.3%qual 84.5%

By track

Track	Events	Typical % of FP	Best	Latest
Road America	4	100.0%	100.0%Runoffs 2020	100.0%Runoffs 2026
Virginia International Raceway	3	100.0%	100.0%Runoffs 2019	100.0%Runoffs 2023
Indianapolis Motor Speedway	2	100.0%	100.0%Runoffs 2017	100.0%Runoffs 2021
Daytona International Speedway	1	100.0%	100.0%Runoffs 2015	100.0%Runoffs 2015
Mid-Ohio Sports Car Course	1	100.0%	100.0%Runoffs 2016	100.0%Runoffs 2016
Sonoma Raceway	1	100.0%	100.0%Runoffs 2018	100.0%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.