BoP Lab / Classes / F6

F6 vs FM vs FB vs FF pace at every track

Lap times across years say as much about the weather as the class. % of F6 is each class's best lap as a share of F6'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-SpecEPF6×FAvsFB ×FCFE2vsFF ×vsFM ×FPFVFXGT1GT2GTXHPPP2SMSMXSRF3STLSTUT1T2T3T4Show 48 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: F6 100.0% of F6 Calvin Stewart, Virginia International Raceway Runoffs 2023 race · FF 101.5% of F6 Jonathan Kotyk, Virginia International Raceway Runoffs 2023 race

% of F6Lap times

F6FMFBFFsolid race · dashed qualifying · slower is lower

F6FMFBFFsolid race · dashed qualifying · each class's best lap as a share of F6's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	F6			FM					FB					FF
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F6	% of F6	Qual best	Race best	Trap	vs F6	% of F6	Qual best	Race best	Trap	vs F6	% of F6
	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%)											2:23.047David 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%)	+3.431squal +4.558s	102.4%qual 103.3%
2 rule changes (FF: 2)1 engine · 1 tyres & wheelsshowhide 2026-07-01 FF Clarification in FF Kent 1600 Compression Ratio Paragraph #40293engine 2026-01-01 FF Formula F Alternative Tire Rule Proposed Clarifications #39281tyres & wheels
	Road America Runoffs 20252025-09-29														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%)
4 rule changes (FF: 4)2 tyres & wheels · 2 weightshowhide 2025-05-01 FF Page 228, FF tire rule 9.1.1.10.e #38251tyres & wheels 2025-03-01 FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change #37802tyres & wheels 2024-11-01 FF Change FF/FC Weight with Sequential Gearbox #36651weight 2024-11-01 FF Alternative Oversize Honda Fit Pistons #37064weight
	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											2:22.552Calvin 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%)	+3.217squal +3.446s	102.3%qual 102.5%
2 rule changes (FF: 2)1 engine · 1 othershowhide 2024-10-01 FF Update to FF EGR Blanking Plate Rule #36633engine 2024-01-01 FF Honda Fit Oversize Piston Rings #35305other
	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											1:59.249Nolan 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%)	+1.767squal +1.812s	101.5%qual 101.5%
1 rule change (FF: 1)1 engineshowhide 2023-03-01 FF Add Fast Forward Part Numbers for Honda Fit Engine #33752engine
	Virginia International Raceway Runoffs 20222022-09-24														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%)
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20212021-09-25														1:44.359Jonathan 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
3 rule changes (FF: 3)2 engine · 1 wordingshowhide 2021-04-01 FF Kent crankshaft clarification #30426wording 2020-12-01 FF Allow Optional Coolant Bleed Line to Correct a Known Problem #29673engine 2020-12-01 FF Clarification regarding Honda LC1 ECU implementation date #29684engine
	Road America Runoffs 20202020-10-02														2:22.916Simon Sikes · fastest of 14 · top 5 within 1.6s	2:24.268Jeffrey Bartz · fastest of 14 · top 5 within 0.4s	138.1Jeffrey Bartz
4 rule changes (FF: 4)3 engine · 1 tyres & wheelsshowhide 2020-08-01 FF Clarification regarding Honda LC1 ECU implementation #29135engine 2020-04-01 FF E&O FF Kent Engine alternator language #28204engine 2020-03-01 FF Honda Racing HPD low cost ECU proposal #27563engine 2020-03-01 FF Update rain tire designation #28443tyres & wheels
	Virginia International Raceway Runoffs 20192019-10-05				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			1:54.469Pete Frost · only car	1:57.688Pete Frost · only car	145.9Pete Frost			1:59.563Tyler O'Connor · fastest of 14 · top 5 within 1.4s	2:20.474Jonathan Kotyk · fastest of 14 · top 5 within 6.3s	136.2Derek Ketchie
3 rule changes (FF: 3)2 engine · 1 inductionshowhide 2019-02-01 FF Request for Oversize Honda Fit Pistons #25810engine 2019-02-01 FF Heat Shield - Fit Intake #26102induction 2019-02-01 FF Request catch cans/tanks clarification #26158engine
	Sonoma Raceway Runoffs 20182018-10-10				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			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			1:41.612Jonathon Kotyk · fastest of 22 · top 5 within 1.7s	1:42.049Jonathon Kotyk · fastest of 22 · top 5 within 1.3s	115.7Denny Renfrow
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25				1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s	1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s				1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s	1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s				1:44.601Zach Holden · fastest of 36 · top 5 within 1.2s	1:44.524Jonathon Kotyk · fastest of 36 · top 5 within 0.5s
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19				1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s	1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s				1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s	1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s				1:29.213Neil Verhagen · fastest of 14 · top 5 within 2.1s	1:30.133Neil Verhagen · fastest of 14 · top 5 within 1.4s
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21				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				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				2:02.489Tim Kautz · fastest of 25 · top 5 within 1.1s	2:03.383Rick Payne · fastest of 22 · top 5 within 0.8s

By track

Track	Events	Typical % of F6	Best	Latest
Road America	4	100.0%2 of 4 with F6	100.0%Runoffs 2024	100.0%Runoffs 2026
Virginia International Raceway	3	100.0%1 of 3 with F6	100.0%Runoffs 2023	100.0%Runoffs 2023
Indianapolis Motor Speedway	2	0 of 2 with F6
Daytona International Speedway	1	0 of 1 with F6
Mid-Ohio Sports Car Course	1	0 of 1 with F6
Sonoma Raceway	1	0 of 1 with F6

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 F6'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.