BoP Lab / Classes / SRF3
SRF3 pace at every track
Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), 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: SRF3 90.2% of the field John Black, Indianapolis Motor Speedway Runoffs 2021 race
| Event | SRF3 | |||||
|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | % of the field | |||
| Road America Runoffs 20262026-09-28 | 2:27.443Tyler Stephens · fastest of 44 · top 5 within 0.3s-0.783s (-0.53%) | 2:29.257Peyton Long · fastest of 42 · top 5 within 0.3s-0.582s (-0.39%) | 134.1Bobby Sak+0.4 mph (+0.3%) | 92.9%qual 91.9% | ||
2 rule changes (SRF3: 2)2 othershow | ||||||
| Road America Runoffs 20252025-09-29 | 2:28.226Bobby Sak · fastest of 43 · top 5 within 0.6s+0.453s (+0.31%) | 2:29.839Morgan Burkhard · fastest of 42 · top 5 within 0.3s+1.710s (+1.15%) | 133.7Bobby Sak-1.5 mph (-1.1%) | 92.8%qual 92.6% | ||
3 rule changes (SRF3: 3)1 weight · 2 othershow | ||||||
| Road America Runoffs 20242024-10-01 | 2:27.773Denny Stripling · fastest of 57 · top 5 within 0.3s-2.013s (-1.34%) | 2:28.129S Sandy Satullo III · fastest of 52 · top 5 within 0.7s-2.909s (-1.93%) | 135.2Denny Stripling+3.4 mph (+2.6%) | 92.4%qual 92.7% | ||
10 rule changes (SRF3: 10)3 suspension & brakes · 3 tyres & wheels · 2 weight · 2 othershow
| ||||||
| Virginia International Raceway Runoffs 20232023-09-23 | 2:03.842Morgan Burkhard · fastest of 40 · top 5 within 0.2s+0.126s (+0.10%) | 2:04.911David Ogburn · fastest of 39 · top 5 within 0.3s-17.155s (-12.08%) | 134.5Bobby Sak+0.1 mph (+0.0%) | 92.6%qual 92.6% | ||
| Virginia International Raceway Runoffs 20222022-09-24 | 2:03.716Franklin Futrelle · fastest of 44 · top 5 within 0.6s-0.908s (-0.73%) | 2:22.066Franklin Futrelle · fastest of 40 · top 5 within 1.2s+17.311s (+13.88%) | 134.5David Ogburn+2.1 mph (+1.6%) | 95.2%qual 93.0% | ||
3 rule changes (SRF3: 3)1 suspension & brakes · 1 tyres & wheels · 1 weightshow | ||||||
| Indianapolis Motor Speedway Runoffs 20212021-09-25 | 1:49.520Franklin Futrelle · fastest of 84 · top 5 within 0.5s-0.304s (-0.28%) | 1:50.095John Black · fastest of 82 · top 5 within 0.2s+0.313s (+0.29%) | 132.1Matthew Horst | 90.2%qual 92.7% | ||
6 rule changes (SRF3: 6)2 engine · 1 suspension & brakes · 1 tyres & wheels · 1 weight · 1 othershow | ||||||
| Road America Runoffs 20202020-10-02 | 2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s | 2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s | 131.9Charles Russell Turner | 93.1%qual 93.2% | ||
7 rule changes (SRF3: 7)4 suspension & brakes · 1 tyres & wheels · 1 weight · 1 othershow
| ||||||
| Virginia International Raceway Runoffs 20192019-10-05 | 2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s | 2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s | 132.4Bobby Sak | 91.2%qual 93.6% | ||
3 rule changes (SRF3: 3)1 suspension & brakes · 2 othershow | ||||||
| Sonoma Raceway Runoffs 20182018-10-10 | 1:46.117Robeson Clay Russell · fastest of 36 · top 5 within 0.5s | 1:47.053TJ Acker · fastest of 35 · top 5 within 0.2s | 110.2Steve Fogg | 91.3%qual 94.1% | ||
| No rule changes on record between these events | ||||||
| Indianapolis Motor Speedway Runoffs 20172017-09-25 | 1:49.824John Black · fastest of 101 · top 5 within 0.5s | 1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s | 92.0%qual 92.8% | |||
| No rule changes on record between these events | ||||||
| Mid-Ohio Sports Car Course Runoffs 20162016-09-19 | 1:34.363John Black · fastest of 41 · top 5 within 0.5s | 1:34.947Cliff White · fastest of 39 · top 5 within 0.3s | 93.5%qual 94.1% | |||
| No rule changes on record between these events | ||||||
| Daytona International Speedway Runoffs 20152015-09-21 | 2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s | 2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s | 93.6%qual 93.3% | |||
By track
| Track | Events | Typical % of the field | Best | Latest |
|---|---|---|---|---|
| Road America | 4 | 92.8% | 92.4%Runoffs 2024 | 92.9%Runoffs 2026 |
| Virginia International Raceway | 3 | 92.6% | 91.2%Runoffs 2019 | 92.6%Runoffs 2023 |
| Indianapolis Motor Speedway | 2 | 90.2% | 90.2%Runoffs 2021 | 90.2%Runoffs 2021 |
| Daytona International Speedway | 1 | 93.6% | 93.6%Runoffs 2015 | 93.6%Runoffs 2015 |
| Mid-Ohio Sports Car Course | 1 | 93.5% | 93.5%Runoffs 2016 | 93.5%Runoffs 2016 |
| Sonoma Raceway | 1 | 91.3% | 91.3%Runoffs 2018 | 91.3%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 the field's best on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks): the weather and the day cancel out, so one figure compares across years where lap times cannot, and across tracks too, since the class's own character at each track is taken out. A track with only one or two events on record is corrected less, since there is less to go on. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.