BoP Lab / Classes / HP

HP vs FV vs F5 pace at every track

Lap times across years say as much about the weather as the class. % of HP is each class's best lap as a share of HP'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 +vsF5 ×FA +FC +FE2 +FF +FP +vsFV ×FX +GT1 +GT2 +GTX +HP×P +P2 +SM +SMX +SRF3 +STL +STU +T1 +T2 +T3 +T4 +Show 50 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: HP 100.0% of HP Alan (Aj) Hulse, Daytona International Speedway Runoffs 2015 race · FV 97.6% of HP Flinn Lazier, Mid-Ohio Sports Car Course Runoffs 2016 race · F5 84.4% of HP James Weida, Road America Runoffs 2020 race

% of HPLap times

HPFVF5solid race · dashed qualifying · slower is lower

HPFVF5solid race · dashed qualifying · each class's best lap as a share of HP's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	HP			FV					F5
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs HP	% of HP	Qual best	Race best	Trap	vs HP	% of HP
	Road America Runoffs 20262026-09-28	2:39.406Chris Schaafsma · fastest of 15 · top 5 within 7.7s+0.621s (+0.39%)	2:38.036Steve Sargis · fastest of 11 · top 5 within 4.6s-0.234s (-0.15%)	122.7Jesse Prather-2.2 mph (-1.8%)	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%)	+7.236squal +7.130s	104.6%qual 104.5%
29 rule changes (HP: 29)7 engine · 7 weight · 4 induction · 3 cars added · 3 tyres & wheels · 1 suspension & brakes · 3 wording · 1 othershowhide 2026-08-01 HP Mini Cooper Compression Ratio #40517engine 2026-07-01 HP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine 2026-07-01 HP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction 2026-07-01 HP HP Honda Civic (92-95) #40464weight -70 lbs 2026-06-01 HP Austin Healy Sprite/ MG Midget 1275 Induction Change Request #40213weight 2026-05-01 HP Miata track width - errors and omissions #39976wording 2026-05-01 HP Triumph GT6 Spec Change. #40098induction 2026-05-01 HP Request to Classify BMW E21 320i #40110cars added 2026-05-01 HP BMW 318is 84-85 engine displacement correction #40116engine 2026-03-01 HP Clarification On Oil Cooler Ducting #39604tyres & wheels 2026-03-01 HP Honda Fit 2015-19 Error in Engine Classification #39853engine 2026-02-01 HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1 #39589engine 2026-01-01 HP E/O: Improve Consistency of the Spec Lines #39500other 2026-01-01 HP Request to Reclassify BMW 2002 Into H Production #39567cars added 2025-12-01 HP Request to Re-Classsify Datsun SPL-311 to HP from FP #39116cars added 2025-12-01 HP TR2 Notes E&O #39180weight 2025-12-01 HP Balance of Power #39187weight +50 lbs 2025-12-01 HP Alternative BOP Request for 84-87 Honda CRX/Civic #39223tyres & wheels 2025-11-01 HP Please Lower Weight of 280Z #38871weight -160 lbs 2025-11-01 HP Miata Weight Adjustment Follow Up #38949weight -25 lbs 2025-11-01 HP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs 2025-11-01 HP HP Volvo 142 spec omission #38994engine 2025-11-01 HP HP Mini DOHC 1.6 #38996engine 2025-11-01 HP Add to Rabbit description #39019wording 2025-11-01 HP Clean-up 9.1.5.E.7e #39025suspension & brakes 2025-11-01 HP Add TB size to Ford Mustang (94-98) Spec Line #39130induction 2025-10-01 HP HP Plymouth Arrow spec omission #38995wording 2025-10-01 HP Add Wheel Diameter to Appendix G #39008tyres & wheels 2025-10-01 HP Add TB ID tolerance to general Prod rules #39009induction
	Road America Runoffs 20252025-09-29	2:38.785Steve Sargis · fastest of 17 · top 5 within 1.9s+0.340s (+0.21%)	2:38.270Steve Sargis · fastest of 14 · top 5 within 2.4s+0.539s (+0.34%)	124.9Chris Schaafsma+2.1 mph (+1.7%)	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%)	+8.466squal +5.316s	105.3%qual 103.3%
17 rule changes (HP: 17)8 weight · 3 induction · 2 cars added · 1 engine · 1 suspension & brakes · 2 othershowhide 2025-07-01 HP BMW Z4 update #38490induction 2025-07-01 HP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs 2025-06-01 HP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs 2025-04-01 HP Request for Classification of Chevrolet Spark #37755cars added 2025-04-01 HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs 2025-03-01 HP Request Competition Adjustment to BMW Z3 2.5L #37120induction 2025-03-01 HP HP Class Adjustments #37459weight +50 lbs 2025-03-01 HP Interpretation of Production Rules on Mirrors #37235other 2025-03-01 HP Weight Reduction for Honda S2000 #37466weight 2025-03-01 HP Mazda 1999 Miata 1.8L #37488weight -50 lbs 2025-03-01 HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions #37560engine 2025-02-21 HP Effective date for Jan 2025 GCR updates #37654induction 2025-01-01 HP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs 2025-01-01 HP Request to Update 1988-1991 Civic to Match 1988-1991 CRX #37444weight -70 lbs 2024-12-01 HP MINI Cooper Spec Line Correction - Rear Brake Rotor Diameter #37176suspension & brakes 2024-11-01 HP 1275 HP Spridget Level 2 Only #36518other 2024-11-01 HP Request for Classification of 1989-1994 Suzuki Swift GT 16V Twin #36858cars added
	Road America Runoffs 20242024-10-01	2:38.445Chuck Mathis · fastest of 20 · top 5 within 3.4s-1.250s (-0.78%)	2:37.731Chuck Mathis · fastest of 19 · top 5 within 2.3s-9.713s (-5.80%)	122.8William Trainer-0.3 mph (-0.2%)	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%)	+7.103squal +4.198s	104.5%qual 102.6%
24 rule changes (HP: 22, FV: 2)11 weight · 4 engine · 2 cars added · 1 induction · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 3 othershowhide 2024-10-01 FV Disc Brakes #36822suspension & brakes 2024-08-01 HP Errant entry in HP production line item #36231other 2024-06-01 HP NIssan 300ZX Z31 to EP #35830cars added 2024-06-01 HP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added 2024-06-01 HP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording 2024-05-01 HP Replace plastic panels #35875other 2024-03-01 HP GCR Correction - Redundant HP Spec Lines #35623engine 2024-02-01 HP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight 2024-01-01 HP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs 2024-01-01 HP Parity in HP #35138other 2024-01-01 HP Spitfire classification #35224engine 2024-01-01 HP Miata Alternate Head #35253weight -50 lbs 2024-01-01 HP Triumph GT6 Adjustments #35255weight 2024-01-01 HP Honda S2000 throttle body #35272induction 2024-01-01 HP Front Header/Nose Panel Alternate Material For 84-87 CRX #35301engine 2024-01-01 HP Correction within Triumph TR8 Spec Line #35315engine 2024-01-01 HP Correction to EP 924S/944 Spec Line #35317weight 2024-01-01 HP Review Classification of HP Mazda 2 #35318weight +75 lbs 2023-12-01 FV FV Wheel Bearing Clarification #35150tyres & wheels 2023-12-01 HP Request to Adjust Weight of 1988-1991 CRX/Civic #35115weight -70 lbs 2023-12-01 HP Porsche 944/924S Rule Change Request #35002weight 2023-12-01 HP FP and HP Toyota Corolla #35030weight -43 lbs 2023-12-01 HP Weight Reduction for Mazda 626 #35031weight -100 lbs 2023-12-01 HP Triumph GT6 Adjustments #35054weight -30 lbs
	Virginia International Raceway Runoffs 20232023-09-23	2:14.029Chris Schaafsma · fastest of 25 · top 5 within 2.7s+0.077s (+0.06%)	2:14.681Chris Schaafsma · fastest of 24 · top 5 within 2.5s+2.878s (+2.18%)	119.4William Trainer-0.8 mph (-0.7%)	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%)	+1.930squal +1.610s	101.4%qual 101.2%
7 rule changes (HP: 7)3 induction · 2 weight · 1 cars added · 1 othershowhide 2023-09-01 HP Larger chokes #34681induction 2023-07-01 HP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction 2023-07-01 HP ITC to FP? #34286other 2023-06-01 HP Request to Classify Sonic and Fiesta in HP #34264cars added 2023-01-01 HP MGB HP Weight Break and/or Hybrid 1/2 Prep in HP #33127weight 2023-01-01 HP Datsun 510 Help #33568weight -50 lbs 2023-01-01 HP Review Limited Prep Port Matching Rules #33600induction
	Virginia International Raceway Runoffs 20222022-09-24	2:13.952Steve Sargis · fastest of 23 · top 5 within 3.9s-0.870s (-0.65%)	2:11.803Vesa Silegren · fastest of 21 · top 5 within 6.3s-3.259s (-2.41%)	120.2Chris Schaafsma-4.7 mph (-3.8%)	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%)	+6.290squal +1.164s	104.8%qual 100.9%	1:57.689James Weida · fastest of 11 · top 5 within 3.9s+0.328s (+0.28%)	2:21.862Sven de Vries · fastest of 10 · top 5 within 14.3s+24.290s (+20.66%)	142.9Calvin Stewart+0.1 mph (+0.1%)	+10.059squal -16.263s	107.6%qual 87.9%
35 rule changes (HP: 25, FV: 4, F5: 6)9 weight · 8 induction · 6 engine · 5 cars added · 2 tyres & wheels · 1 wording · 4 othershowhide 2022-09-01 F5 Intake Boots Correction #33028induction 2022-09-01 HP Request to classify VW New Beetle 2.5L in EP #32725cars added 2022-09-01 HP Request Rotary Injection on Dual Y manifold #32775engine 2022-09-01 HP Request for Corrado Stroke & Displacement Correction #32985engine 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engine 2022-07-01 F5 Clarify stepped exhaust header references #32743engine 2022-06-01 F5 593 carb boot availability and oil pump clarification #32527induction 2022-06-01 HP Subaru BRZ Model Years #32500other 2022-05-01 HP EP MX-5 Global Cup Car #32218weight 2022-05-01 HP Please Class BMW 128i in EP #32370cars added 2022-05-01 HP Inconsistency in Body Work Descriptions #32396other 2022-04-01 HP Mazda RX8 with 13b Rotary #32170induction 2022-04-01 HP Request Idle control valve clarification #32178engine 2022-04-01 HP Classify VW New Beetle in HP. #32241cars added 2022-03-01 F5 E&O class name #32194other 2022-03-01 FV Connecting Rod Update Request for 9.1.1.C Formula Vee (FV) 5.C.6 #32160weight 2022-03-01 FV E&O clarification of connecting rod center-to-center length #32183weight 2022-03-01 HP Weight Change for Competition Adjustment #31182weight +45 lbs 2022-03-01 HP EP Adjustments #31858induction 2022-03-01 HP 1999 3.8L Ford Mustang to EP? #31635weight 2022-03-01 HP Improved Touring Tires #32064tyres & wheels 2022-02-01 HP Throttle Body and Idle Air #31800induction 2022-02-01 HP Incorrect Valve Size Changes in Jan 2022 GCR for FIAT X1/9 #31990engine 2022-01-01 F5 Data Box Mounting Plate #31638other 2022-01-01 FV Update direct replacement connecting rod information #31843weight 2022-01-01 HP Porsche 968 Engine Questions #31478induction 2022-01-01 HP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels 2022-01-01 HP Weight Adjustment To Fiat X1/9 Spec Lines, H-Production #31653weight -50 lbs 2022-01-01 HP 1500 Midget #31665cars added 2022-01-01 HP BMW Z3 2.5L Spec Line #31724induction 2022-01-01 HP Request weight requirement for 1500 MG Midget #31802weight 2021-12-01 FV Formula V Connecting Rod Replacement #31448weight 2021-12-01 HP 944S2 Restrictor #31396induction 2021-12-01 HP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added 2021-10-01 HP E&O; MR2 Track #31120wording
	Indianapolis Motor Speedway Runoffs 20212021-09-25	1:54.417Steve Sargis · fastest of 42 · top 5 within 3.7s-3.004s (-2.56%)	1:56.188Steve Sargis · fastest of 42 · top 5 within 2.9s-1.381s (-1.17%)	122.0William Trainer	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	+1.046squal +3.062s	100.9%qual 102.7%	1:42.619Ryan Mayfield · fastest of 22 · top 5 within 1.6s-0.517s (-0.50%)	1:43.140Sven de Vries · fastest of 20 · top 5 within 1.7s+0.280s (+0.27%)	144.4James Weida	-13.048squal -11.798s	88.8%qual 89.7%
24 rule changes (HP: 21, F5: 3)8 cars added · 5 weight · 3 engine · 3 suspension & brakes · 2 induction · 1 tyres & wheels · 2 wordingshowhide 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-08-01 HP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine 2021-08-01 HP Request a review of the S14 240SX in EP. #30873weight -200 lbs 2021-07-01 HP Lotus/Caterham 7 America Request #30392engine 2021-07-01 HP Request to classify ITC Plymouth Arrow #30588cars added 2021-07-01 HP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added 2021-07-01 HP Reclassify Daimler SP 250 #30721cars added 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine 2021-06-01 HP 924 Brakes- and Thank You. #30614suspension & brakes 2021-06-01 HP Clarify Application of Percentage Based Weight Penalties #30669weight 2021-06-01 HP Correct Induction Error on new HP Mazda 626 Spec Line #30702induction 2021-05-01 HP Volvo 142 spec line complete. #29479cars added 2021-05-01 HP Request to Classify 93-98 Volkswagen Golf to HP #29790cars added 2021-05-01 HP Appeal of Request to Move Porsche 924 to HP #30132cars added 2021-05-01 HP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added 2021-05-01 HP Fiat X1/9 brake rotors #30423suspension & brakes 2021-04-01 HP Request to Classify 2012-2015 MINI Cooper Coupe in HP #30167cars added 2021-04-01 HP Request clarification on VW 1.8 Rabbit GTI Spec Line #30368wording 2021-01-01 HP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes 2020-12-01 HP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs 2020-12-01 HP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction 2020-12-01 HP Weight Reduction for Datsun Roadster #29409weight -75 lbs 2020-12-01 HP EP TR8 Adjustment #29512weight -100 lbs
	Road America Runoffs 20202020-10-02	2:39.695Daniel Meller · fastest of 19 · top 5 within 3.3s	2:47.444Steve Sargis · fastest of 15 · top 5 within 6.1s	123.1William Trainer	2:43.994Hunter Phelps-Barron · fastest of 28 · top 5 within 0.6s	2:45.816Alex Scaler · fastest of 24 · top 5 within 1.5s	117.1Hunter Phelps-Barron	-1.628squal +4.299s	99.0%qual 102.7%	2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s	2:21.391James Weida · fastest of 14 · top 5 within 1.5s	143.2Aaron Ellis	-26.053squal -18.741s	84.4%qual 88.3%
33 rule changes (HP: 21, FV: 6, F5: 6)7 engine · 7 tyres & wheels · 5 induction · 3 cars added · 2 weight · 1 suspension & brakes · 2 wording · 6 othershowhide 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-10-01 HP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels 2020-08-01 HP EP BMW Z3 Rule Clarification #28998engine 2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices #28359other 2020-07-01 F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine 2020-07-01 F5 Re letter requesting driver adjustable carb mixture #28840other 2020-07-01 F5 #28359 WDYT Request for Cockpit Adjustment #28875other 2020-07-01 FV Support for Recommended Item - 4 bolt wheels in FV #29084tyres & wheels 2020-07-01 FV Support for 4-bolt pattern wheels #28955 #29118tyres & wheels 2020-07-01 HP Request to Classify Porsche 911 2.0L #28456cars added 2020-07-01 HP Request Dual Carbs for 1.8 VW GTI Mk1 #28922engine 2020-06-01 HP BMW Cylinder Head Casting and Part Numbers #28708engine 2020-05-01 HP Request to Classify 1990-1994 Mazda Protege #28381cars added 2020-05-01 HP Error in Mini Cooper Spec Line #28713wording 2020-04-01 HP Caterham 7 Spec Line #28498engine 2020-03-01 FV Update rain tire designation #28444tyres & wheels 2020-03-01 HP Letter #27917 #28085induction 2020-03-01 HP Request to Classify 2007 - 2013 Mini Cooper Convertible #28111cars added 2020-03-01 HP Allow HP Datsun 510 Under Level 2 to Utilize Datsun Z Brakes #28121suspension & brakes 2020-03-01 HP Request to allow 40 DCOE carb for the Datsun 510 #28195induction 2020-03-01 HP Request Ford Fiesta Weight Adjustment #28337weight 2020-02-01 HP Request for Help for Datsun 1200 #27934induction 2020-01-01 F5 Change 600cc restrictor size #27883induction 2020-01-01 FV FV Allow non-spec tire in Regional competition #26284tyres & wheels 2020-01-01 FV Request to Allow Rear Tires on the Front of Formula Vee #26537tyres & wheels 2020-01-01 HP Update years for the Mazda2, Honda Fit, & Mini #27782other 2020-01-01 HP Allow Dry Sump, Limited Prep Porsche 914 #27814other 2020-01-01 HP Please Allow Alternate Rear Axle Housing for RWD Toyota Corolla #27854other 2020-01-01 HP Request to List Mazda Miata Throttle Body Size #27907induction 2020-01-01 HP HP VW Rabbit Convertible 1.6L #1922 and 32mm chokes #27917weight 2019-12-01 FV Clarification on Wheel Bolt Pattern #27603tyres & wheels 2019-12-01 HP Request to Correct Track of 1988-91 Honda Civic #27487wording 2019-12-01 HP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
	Virginia International Raceway Runoffs 20192019-10-05	2:14.822Steve Sargis · fastest of 29 · top 5 within 1.1s	2:15.062Ron Bartell · fastest of 28 · top 5 within 1.2s	124.9William Trainer	2:15.712Andrew Whitston · fastest of 26 · top 5 within 1.5s	2:18.289Zachary Whitston · fastest of 19 · top 5 within 0.4s	114.8Roger Siebenaler	+3.227squal +0.890s	102.4%qual 100.7%	1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s	1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s	142.8Eric McRee	-17.490squal -17.461s	87.1%qual 87.0%
17 rule changes (HP: 10, FV: 6, F5: 1)3 induction · 3 tyres & wheels · 2 suspension & brakes · 2 weight · 1 cars added · 1 wording · 5 othershowhide 2019-10-01 FV Allowed Modifications E&O #27398other 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-08-31 FV E&O Wheels #27230tyres & wheels 2019-08-31 HP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other 2019-08-31 HP Request to classify the GMX5 2019 #27263cars added 2019-08-31 HP level one susp. component rule #27270suspension & brakes 2019-08-31 HP Clarification of Carb Rules - Prep 1 #27300induction 2019-08-31 HP Clarification of Carb Rules - Prep 2 #27301induction 2019-08-01 HP Request Miata Eligibility - 2003 #27121other 2019-05-31 FV Exhaust termination rule E&O #26702other 2019-05-01 FV E&O Dimensions #26674other 2019-04-01 FV Request to clarify Disc Brake rules bearing retainer & weights #26262suspension & brakes 2019-04-01 HP Rollcenter Correction Clarification #25873tyres & wheels 2019-04-01 HP Hardtops #26476wording 2019-03-01 HP Do Something About the Toyota Yaris In H Production #25834weight +130 lbs 2019-03-01 HP Request to Allow 2011+ Fiesta to Change Bolt Pattern on Wheels #25929tyres & wheels 2019-02-01 FV FV Intake Manifold Clarification #26008induction
	Sonoma Raceway Runoffs 20182018-10-10	1:54.070Brian Linn · fastest of 16 · top 5 within 2.8s	1:54.434Jason Isley · fastest of 16 · top 5 within 3.3s	109.3Michael H Miller	1:52.637Skip Streets · fastest of 29 · top 5 within 1.6s	1:53.639Alex Scaler · fastest of 28 · top 5 within 0.4s	106.3Skip Streets	-0.795squal -1.433s	99.3%qual 98.7%	1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s	1:42.491David Lapham · fastest of 5 · top 5 within 9.5s	113.3David Lapham	-11.943squal -12.263s	89.6%qual 89.2%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:57.421Jason Isley · fastest of 46 · top 5 within 0.9s	1:57.569Vesa Silegren · fastest of 40 · top 5 within 1.1s		1:55.759Michael Varacins · fastest of 39 · top 5 within 1.0s	1:55.923Michael Varacins · fastest of 32 · top 5 within 1.3s		-1.646squal -1.662s	98.6%qual 98.6%	1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s	1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s		-14.709squal -14.285s	87.5%qual 87.8%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:39.954Jason Isley · fastest of 34 · top 5 within 1.5s	1:40.442Jason Isley · fastest of 34 · top 5 within 0.4s		1:37.942Alex Scaler · fastest of 41 · top 5 within 0.3s	1:38.066Flinn Lazier · fastest of 38 · top 5 within 0.7s		-2.376squal -2.012s	97.6%qual 98.0%	1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s	1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s		-10.589squal -11.426s	89.5%qual 88.6%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	2:17.369Jason Isley · fastest of 18 · top 5 within 2.5s	2:17.981Alan (Aj) Hulse · fastest of 17 · top 5 within 1.1s		2:21.167Roger Siebenaler · fastest of 31 · top 5 within 0.8s	2:21.142Andrew Whitston · fastest of 30 · top 5 within 1.1s		+3.161squal +3.798s	102.3%qual 102.8%	2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s	2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s		-14.683squal -15.545s	89.4%qual 88.7%

By track

Track	Events	Typical % of HP	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 HP'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.