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BoP Lab / Classes / F6

F6 vs FB vs PX 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)
AS+B-Spec+EP+F6×FA+vsFB×FC+FE2+FF+FP+FV+FX+GT1+GT2+GTX+HP+P+P2+vsPX×SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 48 inactive classes
Series
Reference class · the yardstick the % column and chart are measured against
Tracks · untick to narrow

Quickest here: F6 1:57.437 Calvin Stewart, Runoffs 2023 qualifying · FB 1:19.886 Alex Mayer, Runoffs 2016 qualifying

1:201:402:002:20F6 race best at Runoffs 2023: 1:58.816 (Calvin Stewart)F6 race best at Runoffs 2024: 2:18.840 (James Weida)F6 race best at Runoffs 2026: 2:20.255 (James Weida)F6 qualifying best at Runoffs 2023: 1:57.437 (Calvin Stewart)F6 qualifying best at Runoffs 2024: 2:19.106 (Calvin Stewart)F6 qualifying best at Runoffs 2026: 2:18.489 (Calvin Stewart)FB race best at Runoffs 2015: 1:51.616 (J R Osborne)FB race best at Runoffs 2016: 1:21.015 (Jeremy Hill)FB race best at Runoffs 2017: 1:33.702 (Alex Mayer)FB race best at Runoffs 2018: 1:31.189 (J R Osborne)FB race best at Runoffs 2019: 1:57.688 (Pete Frost)FB qualifying best at Runoffs 2015: 1:50.711 (J R Osborne)FB qualifying best at Runoffs 2016: 1:19.886 (Alex Mayer)FB qualifying best at Runoffs 2017: 1:33.746 (Gary Hickman)FB qualifying best at Runoffs 2018: 1:28.612 (J R Osborne)FB qualifying best at Runoffs 2019: 1:54.469 (Pete Frost)Daytona International Speedway · Runoffs 2015Runoffs2015Mid-Ohio Sports Car Course · Runoffs 2016Runoffs2016Indianapolis Motor Speedway · Runoffs 2017Runoffs2017Sonoma Raceway · Runoffs 2018Runoffs2018Virginia International Raceway · Runoffs 2019Runoffs2019Virginia International Raceway · Runoffs 2023Runoffs2023Road America · Runoffs 2024Runoffs2024Road America · Runoffs 2026Runoffs2026
F6FBPXsolid race · dashed qualifying · slower is lower
100%F6 race best at Runoffs 2023: 100.0% of F6's (Calvin Stewart)F6 race best at Runoffs 2024: 100.0% of F6's (James Weida)F6 race best at Runoffs 2026: 100.0% of F6's (James Weida)F6 qualifying best at Runoffs 2023: 100.0% of F6's (Calvin Stewart)F6 qualifying best at Runoffs 2024: 100.0% of F6's (Calvin Stewart)F6 qualifying best at Runoffs 2026: 100.0% of F6's (Calvin Stewart)Daytona International Speedway · Runoffs 2015Runoffs2015Mid-Ohio Sports Car Course · Runoffs 2016Runoffs2016Indianapolis Motor Speedway · Runoffs 2017Runoffs2017Sonoma Raceway · Runoffs 2018Runoffs2018Virginia International Raceway · Runoffs 2019Runoffs2019Virginia International Raceway · Runoffs 2023Runoffs2023Road America · Runoffs 2024Runoffs2024Road America · Runoffs 2026Runoffs2026
F6FBPXsolid 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
EventF6FBPX
Qual bestRace bestTrapQual bestRace bestTrapvs F6% of F6Qual bestRace bestTrapvs F6% of F6
Road America Runoffs 20262026-09-282:18.489Calvin 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%)
No rule changes on record between these events
Road America Runoffs 20242024-10-012:19.106Calvin Stewart · fastest of 22 · top 5 within 1.3s2:18.840James Weida · fastest of 22 · top 5 within 1.0s147.6Calvin Stewart
No rule changes on record between these events
Virginia International Raceway Runoffs 20232023-09-231:57.437Calvin Stewart · fastest of 9 · top 5 within 4.7s1:58.816Calvin Stewart · fastest of 9 · top 5 within 3.6s144.0Calvin Stewart
No rule changes on record between these events
Virginia International Raceway Runoffs 20192019-10-051:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost
No rule changes on record between these events
Sonoma Raceway Runoffs 20182018-10-101:28.612J R Osborne · fastest of 7 · top 5 within 3.3s1:31.189J R Osborne · fastest of 7 · top 5 within 3.7s140.5J R Osborne
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:50.711J R Osborne · fastest of 20 · top 5 within 1.1s1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s

By track

TrackEventsTypical % of F6BestLatest
Road America2100.0%100.0%Runoffs 2024100.0%Runoffs 2026
Virginia International Raceway2100.0%1 of 2 with F6100.0%Runoffs 2023100.0%Runoffs 2023
Daytona International Speedway10 of 1 with F6
Indianapolis Motor Speedway10 of 1 with F6
Mid-Ohio Sports Car Course10 of 1 with F6
Sonoma Raceway10 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, the track and its configuration cancel out, so one figure compares across tracks and years where lap times cannot. 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.