BoP Lab / Classes / F6
F6 vs FM vs F500 vs SMX 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.
Closest to the field: F6 100.0% of F6 Calvin Stewart, Virginia International Raceway Runoffs 2023 race · SMX 111.5% of F6 Cam Ebben, Road America Runoffs 2026 race
| Event | F6 | FM | F500 | SMX | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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%) | 2:36.472Skyler Cottrell · fastest of 21 · top 5 within 0.4s+0.240s (+0.15%) | 2:36.414Cam Ebben · fastest of 21 · top 5 within 1.1s-0.677s (-0.43%) | 128.4Christian Hoagland-0.6 mph (-0.5%) | +16.159squal +17.983s | 111.5%qual 113.0% | ||||||||||||
2 rule changes (SMX: 2)1 wording · 1 othershow | ||||||||||||||||||||
| Road America Runoffs 20252025-09-29 | 2:36.232Cam Ebben · fastest of 20 · top 5 within 0.2s+0.581s (+0.37%) | 2:37.091Michael Tinis · fastest of 19 · top 5 within 0.3s+0.813s (+0.52%) | 129.1Camden Gruber-0.4 mph (-0.3%) | |||||||||||||||||
5 rule changes (SMX: 5)1 tyres & wheels · 1 wording · 3 othershow | ||||||||||||||||||||
| 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 | 2:35.651Ethan Lampe · fastest of 23 · top 5 within 0.7s | 2:36.278Ethan Jacobs · fastest of 22 · top 5 within 0.7s | 129.5Michael Borden | +17.438squal +16.545s | 112.6%qual 111.9% | ||||||||||||
| 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 | 2:11.435Nathan Nicholson · fastest of 18 · top 5 within 0.6s | 2:12.616Noah Harmon · fastest of 16 · top 5 within 0.1s | 127.8Noah Harmon | +13.800squal +13.998s | 111.6%qual 111.9% | ||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| 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 | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| 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 | |||||||||||||||||
| 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 | ||||||||||||||||||
| 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 | ||||||||||||||||||
| 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 | ||||||||||||||||||
By track
| Track | Events | Typical % of F6 | Best | Latest |
|---|---|---|---|---|
| Road America | 3 | 100.0%2 of 3 with F6 | 100.0%Runoffs 2024 | 100.0%Runoffs 2026 |
| Virginia International Raceway | 2 | 100.0%1 of 2 with F6 | 100.0%Runoffs 2023 | 100.0%Runoffs 2023 |
| Daytona International Speedway | 1 | 0 of 1 with F6 | ||
| Indianapolis Motor 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.