BoP Lab / Classes / FE2
FE2 vs FM vs F5 pace at every track
Lap times across years say as much about the weather as the class. % of FE2 is each class's best lap as a share of FE2'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: FE2 100.0% of FE2 Flinn Lazier, Sonoma Raceway Runoffs 2018 race · FM 102.5% of FE2 Bryce Cornet, Sonoma Raceway Runoffs 2018 race · F5 104.8% of FE2 Wiley Mcmahan, Virginia International Raceway Runoffs 2019 race
| Event | FE2 | FM | F5 | ||||||||||||
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs FE2 | % of FE2 | Qual best | Race best | Trap | vs FE2 | % of FE2 | |||
| Road America Runoffs 20262026-09-28 | 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%) | ||||||||||||
1 rule change (FE2: 1)1 cars added · FE and FE2 Enterprise bubble tail part WM138014 now allowed; FE2 must use this configuration only.show
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| 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%) | ||||||||||||
1 rule change (FE2: 1)1 other · FE2 allows pre-approved driver safety and comfort seat and control modifications for drivers with disabilities, per logbook.show
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| Road America Runoffs 20242024-10-01 | 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%) | ||||||||||||
| No rule changes on record between these events | |||||||||||||||
| Virginia International Raceway Runoffs 20232023-09-23 | 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%) | ||||||||||||
| No rule changes on record between these events | |||||||||||||||
| Virginia International Raceway Runoffs 20222022-09-24 | 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%) | 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%) | +9.817squal +6.836s | 107.4%qual 106.2% | |||||||
6 rule changes (F5: 6)1 engine · 3 wording · 2 other · F500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO. · F500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU. · F500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area. · F500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted. · F500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2. · F5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs.show
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| Indianapolis Motor Speedway Runoffs 20212021-09-25 | 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 | 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 | +6.485squal +6.224s | 106.7%qual 106.5% | |||||||
3 rule changes (F5: 3)1 cars added · 2 wording · F5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control. · F5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition. · F500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required.show
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| Road America Runoffs 20202020-10-02 | 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 | 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 | +8.120squal +8.148s | 106.1%qual 106.1% | |||||||
8 rule changes (FE2: 2, F5: 6)2 engine · 1 induction · 1 weight · 4 wording · F500 Suzuki GSXR600 engine years extended from 2003-2013 to 2003-2019. · FE2 oil cooler rule clarified: Setrab 50-625-7612 or any cooler with max core 13 inches wide by 6.5 inches high allowed. · F5 request to adjust external jetting device cockpit control denied; no rule change made. · F5 driver adjustable carburettor mixture: refer to separate Fastrack letter #28359 for ruling. · F5 cockpit adjustment request response published in Fastrack letter 28359. · F500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. · FE minimum weight rises to 1270 lbs; FE2 minimum weight rises to 1270 lbs; new spring options added; tire warmers prohibited.show
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| Virginia International Raceway Runoffs 20192019-10-05 | 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 | 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 | +23.662squal +4.062s | 121.1%qual 103.7% | 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 | +5.418squal +6.299s | 104.8%qual 105.7% | ||
1 rule change (F5: 1)1 weight · F500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs.show
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| Sonoma Raceway Runoffs 20182018-10-10 | 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 | 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 | +2.346squal +2.558s | 102.5%qual 102.7% | 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 | +6.928squal +6.767s | 107.2%qual 107.1% | ||
| 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 | 1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s | 1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s | |||||||||||
| 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 | 1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s | 1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s | |||||||||||
| 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 | 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 | |||||||||||
By track
| Track | Events | Typical % of FE2 | Best | Latest |
|---|---|---|---|---|
| Road America | 4 | 100.0% | 100.0%Runoffs 2020 | 100.0%Runoffs 2026 |
| Virginia International Raceway | 3 | 100.0% | 100.0%Runoffs 2019 | 100.0%Runoffs 2023 |
| Indianapolis Motor Speedway | 2 | 100.0%1 of 2 with FE2 | 100.0%Runoffs 2021 | 100.0%Runoffs 2021 |
| Daytona International Speedway | 1 | 0 of 1 with FE2 | ||
| Mid-Ohio Sports Car Course | 1 | 0 of 1 with FE2 | ||
| 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 FE2'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.