BoP Lab / Classes / F5

F5 vs FE vs F6 vs FE2 pace at every track

Lap times across years say as much about the weather as the class. % of F5 is each class's best lap as a share of F5'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-SpecEPF5×vsF6 ×F600FAFCvsFE ×vsFE2 ×FFFPFVFXGT1GT2GTXHPPP2SMSMXSRF3STLSTUT1T2T3T4Show 53 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 Carolina Motorsports Park Circuit of St. Louis (formerly Gateway Motorsports Circuit of the Americas Daytona International Speedway Eagles Canyon Raceway Gingerman Raceway Grattan Raceway Hallett Motor Racing Circuit Homestead-Miami Speedway Indianapolis Motor Speedway Laguna Seca Michelin Raceway Road Atlanta Mid-Ohio Sports Car Course MotorSport Ranch Cresson MSR Houston New Jersey Motorsports Park NOLA Motorsports Park Ozarks International Raceway Pacific Raceways Pittsburgh International Race Complex Podium Club at ATTESA Portland International Raceway Pueblo Motorsports Park Road America Roebling Road Sebring International Raceway Sonoma Raceway Summit Point Motorsports Park Summit Point Raceway Thunderhill Raceway Park Virginia International Raceway Watkins Glen International Willow Springs Raceway World Wide Technology Raceway

Closest to the field: F5 100.0% of F5 Matthew Strand, Daytona International Speedway Runoffs 2015 race · FE 95.8% of F5 Mark Snyder, Sonoma Raceway Runoffs 2018 qualifying · FE2 93.1% of F5 Jason Conzo, Virginia International Raceway Runoffs 2022 race

% of F5Lap times

F5FEF6FE2solid race · dashed qualifying · slower is lower

F5FEF6FE2solid race · dashed qualifying · each class's best lap as a share of F5's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	F5			FE					F6					FE2
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5
	Road America Runoffs 20262026-09-28									2:18.489Calvin Stewart · fastest of 13 · top 5 within 4.2s-0.617s (-0.44%)	2:20.255James Weida · fastest of 13 · top 5 within 2.0s+1.415s (+1.02%)	143.0Calvin Stewart-4.5 mph (-3.1%)			2:12.326Franklin Futrelle · fastest of 8 · top 5 within 1.9s-0.149s (-0.11%)	2:11.881Franklin Futrelle · fastest of 8 · top 5 within 1.6s-1.458s (-1.09%)	143.5Steve Whitston-5.5 mph (-3.7%)
3 rule changes (FE: 2, FE2: 1)1 engine · 2 othershowhide 2026-01-01 FE FE & FE2 Rule Updates #39484engine 2025-10-01 FE FE & FE2 Bubble Tail #38978other 2025-10-01 FE2 FE & FE2 Bubble Tail #38978other
	Road America Runoffs 20252025-09-29														2:12.475Franklin Futrelle · fastest of 11 · top 5 within 1.4s+0.969s (+0.74%)	2:13.339Franklin Futrelle · fastest of 10 · top 5 within 0.6s+0.591s (+0.45%)	149.0Steve Whitston+3.7 mph (+2.6%)
3 rule changes (FE: 2, FE2: 1)1 suspension & brakes · 1 weight · 1 othershowhide 2025-09-01 FE FE & FE2 Rule Updates #38901weight 2025-04-01 FE2 Driver Safety & Comfort #37965other 2024-12-01 FE Brake Line to A-Arm Covers #37110suspension & brakes
	Road America Runoffs 20242024-10-01									2:19.106Calvin Stewart · fastest of 22 · top 5 within 1.3s	2:18.840James Weida · fastest of 22 · top 5 within 1.0s	147.6Calvin Stewart			2:11.506Porter Aiken · fastest of 18 · top 5 within 0.5s-1.300s (-0.98%)	2:12.748Porter Aiken · fastest of 17 · top 5 within 2.0s-0.523s (-0.39%)	145.3Porter Aiken+1.9 mph (+1.3%)
5 rule changes (FE: 5)2 tyres & wheels · 1 wording · 2 othershowhide 2024-09-01 FE Protest Fee Clarification #36540wording 2024-09-01 FE Update on Letter 36620 with new Hoosier Contingency Decal Info #36625tyres & wheels 2024-08-01 FE Hoosier Tire Decal Placement #36435tyres & wheels 2024-01-01 FE Update FE Rain Light Rule #34707other 2024-01-01 FE FE/FE2 rule update #35269other
	Virginia International Raceway Runoffs 20232023-09-23									1:57.437Calvin Stewart · fastest of 9 · top 5 within 4.7s	1:58.816Calvin Stewart · fastest of 9 · top 5 within 3.6s	144.0Calvin Stewart			1:50.665Charles Russell Turner · fastest of 26 · top 5 within 2.3s-0.188s (-0.17%)	1:51.098Franklin Futrelle · fastest of 19 · top 5 within 1.4s-20.947s (-15.86%)	141.3Franklin Futrelle-0.6 mph (-0.4%)
3 rule changes (FE: 3)1 aero · 1 suspension & brakes · 1 othershowhide 2023-04-01 FE Update FE SADEV Transmission Rule #33883other 2022-10-01 FE Brake bias adjuster clarification #33084suspension & brakes 2022-10-01 FE FE Front and Rear Wing Update & Clarification #33089aero
	Virginia International Raceway Runoffs 20222022-09-24	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%)											1:50.853Charles Russell Turner · fastest of 25 · top 5 within 1.1s-0.209s (-0.19%)	2:12.045Jason Conzo · fastest of 22 · top 5 within 1.8s+19.891s (+17.74%)	141.9Eric Cruz-0.6 mph (-0.5%)	-9.817squal -6.836s	93.1%qual 94.2%
10 rule changes (F5: 6, FE: 4)4 engine · 2 induction · 1 tyres & wheels · 3 othershowhide 2022-09-01 F5 Intake Boots Correction #33028induction 2022-09-01 FE Engine Heat Shield & Insulation #33019engine 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 FE Update FE/FE2 Tire Rule #32613tyres & wheels 2022-06-01 FE Master cylinder clarification #32669engine 2022-03-01 F5 E&O class name #32194other 2022-01-01 F5 Data Box Mounting Plate #31638other 2021-12-01 FE Two FE2 Rule Updates #31524other
	Indianapolis Motor Speedway Runoffs 20212021-09-25	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											1:36.395Max Grau · fastest of 28 · top 5 within 0.7s	1:36.655Max Grau · fastest of 28 · top 5 within 0.7s	146.2Gray Fowler	-6.485squal -6.224s	93.7%qual 93.9%
7 rule changes (F5: 3, FE: 4)2 tyres & wheels · 1 engine · 1 suspension & brakes · 2 wording · 1 othershowhide 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-07-01 FE FE Tire Rule Changes #30754tyres & wheels 2021-07-01 FE Radiator Screens Clarification #30792wording 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine 2021-06-01 FE FE Radiator Screens #30575other 2020-12-01 FE FE / FE2 Spring Updates #29689suspension & brakes
	Road America Runoffs 20202020-10-02	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											2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s	2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s	143.4Owen McAllister	-8.120squal -8.148s	94.3%qual 94.2%
13 rule changes (F5: 6, FE: 5, FE2: 2)3 weight · 2 aero · 2 engine · 1 induction · 1 suspension & brakes · 1 wording · 3 othershowhide 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-10-01 FE FE Gurney Flap Spec Update #29445aero 2020-09-01 FE2 FE/FE2 Oil Cooler #29293wording 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 2020-06-01 FE FE Gurney flap wicker clarification #28885aero 2020-05-01 FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes 2020-01-01 F5 Change 600cc restrictor size #27883induction 2020-01-01 FE Request for FE / FE2 preparation rules update #27722weight 2019-12-01 FE FE / FE2 Update Rules #27624weight 2019-12-01 FE2 FE / FE2 Update Rules #27624weight
	Virginia International Raceway Runoffs 20192019-10-05	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	1:54.710Mark Snyder · fastest of 9 · top 5 within 1.3s	1:55.648Mark Snyder · fastest of 9 · top 5 within 0.9s	135.5James Libecco	-1.924squal -2.651s	98.4%qual 97.7%						1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s	1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s	142.6Robert Vanman	-5.418squal -6.299s	95.4%qual 94.6%
6 rule changes (F5: 1, FE: 5)3 tyres & wheels · 1 suspension & brakes · 1 weight · 1 othershowhide 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-05-31 FE FE Anti-Roll Bar Clarification #26912suspension & brakes 2019-05-31 FE FE / FE2 Updated Bubble Tail Rule #26913other 2019-03-01 FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
	Sonoma Raceway Runoffs 20182018-10-10	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	1:37.517Mark Snyder · fastest of 10 · top 5 within 1.4s	1:38.504Lee Rackley · fastest of 10 · top 5 within 0.8s	124.7Quinten Nelson	-3.987squal -4.290s	96.1%qual 95.8%						1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s	1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s	126.8Scott Rettich	-6.928squal -6.767s	93.2%qual 93.4%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	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		1:39.177Elliot Finlayson · fastest of 35 · top 5 within 1.3s	1:39.726Elliot Finlayson · fastest of 35 · top 5 within 0.8s		-3.134squal -3.959s	97.0%qual 96.2%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s	1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s		1:27.636Scott Rettich · fastest of 9 · top 5 within 1.7s	1:30.563Hanna Zellers · fastest of 9 · top 5 within 2.2s		+0.710squal -0.892s	100.8%qual 99.0%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	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		1:57.824Scott Rettich · fastest of 16 · top 5 within 1.0s	1:59.040Scott Rettich · fastest of 16 · top 5 within 1.3s		-4.258squal -4.000s	96.5%qual 96.7%

By track

Track	Events	Typical % of F5	Best	Latest
Road America	4	100.0%1 of 4 with F5	100.0%Runoffs 2020	100.0%Runoffs 2020
Virginia International Raceway	3	100.0%2 of 3 with F5	100.0%Runoffs 2019	100.0%Runoffs 2022
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 F5'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.