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BoP Lab / Classes / FB

FB vs FE vs SRF vs FE2 pace at every track

Lap times across years say as much about the weather as the class. % of FB is each class's best lap as a share of FB'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-SpecEPFAFB×FCvsFE×vsFE2×FFFPFVFXGT1GT2GTXHPPP2SMSMXvsSRF×SRF3STLSTUT1T2T3T4Show 48 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: FB 100.0% of FB J R Osborne, Daytona International Speedway Runoffs 2015 race · FE 98.3% of FB Mark Snyder, Virginia International Raceway Runoffs 2019 race · SRF 119.0% of FB Thomas Kirchman, Indianapolis Motor Speedway Runoffs 2017 qualifying · FE2 95.3% of FB Liam Snyder, Virginia International Raceway Runoffs 2019 race

1:201:402:002:206 rule changes between Runoffs 2018 and Runoffs 20196 ▾12 rule changes between Runoffs 2019 and Runoffs 202012 ▾10 rule changes between Runoffs 2020 and Runoffs 202110 ▾7 rule changes between Runoffs 2021 and Runoffs 20227 ▾6 rule changes between Runoffs 2022 and Runoffs 20236 ▾15 rule changes between Runoffs 2023 and Runoffs 202415 ▾5 rule changes between Runoffs 2024 and Runoffs 20255 ▾6 rule changes between Runoffs 2025 and Runoffs 20266 ▾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)FE race best at Runoffs 2015: 1:59.040 (Scott Rettich)FE race best at Runoffs 2016: 1:30.563 (Hanna Zellers)FE race best at Runoffs 2017: 1:39.726 (Elliot Finlayson)FE race best at Runoffs 2018: 1:38.504 (Lee Rackley)FE race best at Runoffs 2019: 1:55.648 (Mark Snyder)FE qualifying best at Runoffs 2015: 1:57.824 (Scott Rettich)FE qualifying best at Runoffs 2016: 1:27.636 (Scott Rettich)FE qualifying best at Runoffs 2017: 1:39.177 (Elliot Finlayson)FE qualifying best at Runoffs 2018: 1:37.517 (Mark Snyder)FE qualifying best at Runoffs 2019: 1:54.710 (Mark Snyder)SRF race best at Runoffs 2015: 2:16.700 (Cliff White)SRF race best at Runoffs 2016: 1:37.621 (Todd Harris)SRF race best at Runoffs 2017: 1:53.769 (Todd Harris)SRF qualifying best at Runoffs 2015: 2:14.306 (Cliff White)SRF qualifying best at Runoffs 2016: 1:37.344 (Mike Miserendino)SRF qualifying best at Runoffs 2017: 1:51.573 (Thomas Kirchman)FE2 race best at Runoffs 2018: 1:35.563 (Flinn Lazier)FE2 race best at Runoffs 2019: 1:52.154 (Liam Snyder)FE2 race best at Runoffs 2020: 2:13.271 (Owen McAllister)FE2 race best at Runoffs 2021: 1:36.655 (Max Grau)FE2 race best at Runoffs 2022: 2:12.045 (Jason Conzo)FE2 race best at Runoffs 2023: 1:51.098 (Franklin Futrelle)FE2 race best at Runoffs 2024: 2:12.748 (Porter Aiken)FE2 race best at Runoffs 2025: 2:13.339 (Franklin Futrelle)FE2 race best at Runoffs 2026: 2:11.881 (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 1:35.040 (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 1:51.062 (Liam Snyder)FE2 qualifying best at Runoffs 2020: 2:12.806 (Scott Rettich)FE2 qualifying best at Runoffs 2021: 1:36.395 (Max Grau)FE2 qualifying best at Runoffs 2022: 1:50.853 (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 1:50.665 (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 2:11.506 (Porter Aiken)FE2 qualifying best at Runoffs 2025: 2:12.475 (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 2:12.326 (Franklin Futrelle)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
FBFESRFFE2solid race · dashed qualifying · slower is lower
100%110%120%6 rule changes between Runoffs 2018 and Runoffs 20196 ▾12 rule changes between Runoffs 2019 and Runoffs 202012 ▾10 rule changes between Runoffs 2020 and Runoffs 202110 ▾7 rule changes between Runoffs 2021 and Runoffs 20227 ▾6 rule changes between Runoffs 2022 and Runoffs 20236 ▾15 rule changes between Runoffs 2023 and Runoffs 202415 ▾5 rule changes between Runoffs 2024 and Runoffs 20255 ▾6 rule changes between Runoffs 2025 and Runoffs 20266 ▾FB race best at Runoffs 2015: 100.0% of FB's (J R Osborne)FB race best at Runoffs 2016: 100.0% of FB's (Jeremy Hill)FB race best at Runoffs 2017: 100.0% of FB's (Alex Mayer)FB race best at Runoffs 2018: 100.0% of FB's (J R Osborne)FB race best at Runoffs 2019: 100.0% of FB's (Pete Frost)FB qualifying best at Runoffs 2015: 100.0% of FB's (J R Osborne)FB qualifying best at Runoffs 2016: 100.0% of FB's (Alex Mayer)FB qualifying best at Runoffs 2017: 100.0% of FB's (Gary Hickman)FB qualifying best at Runoffs 2018: 100.0% of FB's (J R Osborne)FB qualifying best at Runoffs 2019: 100.0% of FB's (Pete Frost)FE race best at Runoffs 2015: 106.7% of FB's (Scott Rettich)FE race best at Runoffs 2016: 111.8% of FB's (Hanna Zellers)FE race best at Runoffs 2017: 106.4% of FB's (Elliot Finlayson)FE race best at Runoffs 2018: 108.0% of FB's (Lee Rackley)FE race best at Runoffs 2019: 98.3% of FB's (Mark Snyder)FE qualifying best at Runoffs 2015: 106.4% of FB's (Scott Rettich)FE qualifying best at Runoffs 2016: 109.7% of FB's (Scott Rettich)FE qualifying best at Runoffs 2017: 105.8% of FB's (Elliot Finlayson)FE qualifying best at Runoffs 2018: 110.0% of FB's (Mark Snyder)FE qualifying best at Runoffs 2019: 100.2% of FB's (Mark Snyder)SRF race best at Runoffs 2015: 122.5% of FB's (Cliff White)SRF race best at Runoffs 2016: 120.5% of FB's (Todd Harris)SRF race best at Runoffs 2017: 121.4% of FB's (Todd Harris)SRF qualifying best at Runoffs 2015: 121.3% of FB's (Cliff White)SRF qualifying best at Runoffs 2016: 121.9% of FB's (Mike Miserendino)SRF qualifying best at Runoffs 2017: 119.0% of FB's (Thomas Kirchman)FE2 race best at Runoffs 2018: 104.8% of FB's (Flinn Lazier)FE2 race best at Runoffs 2019: 95.3% of FB's (Liam Snyder)FE2 qualifying best at Runoffs 2018: 107.3% of FB's (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 97.0% of FB's (Liam Snyder)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
FBFESRFFE2solid race · dashed qualifying · each class's best lap as a share of FB's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFBFESRFFE2
Qual best Race best Trap Qual best Race best Trap vs FB % of FB Qual best Race best Trap vs FB % of FB Qual best Race best Trap vs FB % of FB 
Road America Runoffs 20262026-09-282:12.326Franklin 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%)
6 rule changes (FE: 2, SRF: 3, FE2: 1)1 engine · 1 suspension & brakes · 4 othershowhide
  • SRF GCR Rain/Brake Light Correction #40579suspension & brakes
  • SRF SRF3 Spark Plugs #39899other
  • FE FE & FE2 Rule Updates #39484engine
  • FE FE & FE2 Bubble Tail #38978other
  • FE2 FE & FE2 Bubble Tail #38978other
  • SRF Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:12.475Franklin 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%)
5 rule changes (FE: 2, SRF: 2, FE2: 1)1 suspension & brakes · 1 weight · 3 othershowhide
  • FE FE & FE2 Rule Updates #38901weight
  • FE2 Driver Safety & Comfort #37965other
  • SRF Driver Safety & Comfort #37966other
  • SRF Update SADEV transmission specs #37992other
  • FE Brake Line to A-Arm Covers #37110suspension & brakes
Road America Runoffs 20242024-10-012:11.506Porter 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%)
15 rule changes (FE: 5, SRF: 10)5 tyres & wheels · 3 suspension & brakes · 1 weight · 2 wording · 4 othershowhide
  • SRF Update SRF3 Air Filter Rule #36681other
  • SRF Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF Hoosier Tire Decal Placement #36739tyres & wheels
  • FE Protest Fee Clarification #36540wording
  • FE Update on Letter 36620 with new Hoosier Contingency Decal Info #36625tyres & wheels
  • SRF Protest Fee Clarification #36540wording
  • SRF Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels
  • FE Hoosier Tire Decal Placement #36435tyres & wheels
  • SRF Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • FE Update FE Rain Light Rule #34707other
  • FE FE/FE2 rule update #35269other
  • SRF Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF SRF / SRF3 Rule Updates #35268weight
  • SRF SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-231:50.665Charles 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%)
6 rule changes (FE: 3, SRF: 3)2 suspension & brakes · 2 tyres & wheels · 1 aero · 1 othershowhide
  • SRF Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • SRF Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • FE Update FE SADEV Transmission Rule #33883other
  • SRF Update SRF Brake Rule #33469suspension & brakes
  • FE Brake bias adjuster clarification #33084suspension & brakes
  • FE FE Front and Rear Wing Update & Clarification #33089aero
Virginia International Raceway Runoffs 20222022-09-241:50.853Charles 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%)
7 rule changes (FE: 4, SRF: 3)2 engine · 2 tyres & wheels · 1 suspension & brakes · 1 weight · 1 othershowhide
  • FE Engine Heat Shield & Insulation #33019engine
  • FE Update FE/FE2 Tire Rule #32613tyres & wheels
  • FE Master cylinder clarification #32669engine
  • SRF SRF Tire Rule Update #32614tyres & wheels
  • SRF Brake, seal, and air filter clarifications #32670suspension & brakes
  • FE Two FE2 Rule Updates #31524other
  • SRF Three Updates to SRF Rules #31523weight
Indianapolis Motor Speedway Runoffs 20212021-09-251:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler
10 rule changes (FE: 4, SRF: 6)2 engine · 2 suspension & brakes · 2 tyres & wheels · 1 weight · 1 wording · 2 othershowhide
  • SRF SRF Wet Tires #30849tyres & wheels
  • SRF SADEV-SRF3 Transmission #30926other
  • SRF SRF Update Maintenance, Repairs and Seals #30961engine
  • FE FE Tire Rule Changes #30754tyres & wheels
  • FE Radiator Screens Clarification #30792wording
  • FE FE Radiator Screens #30575other
  • SRF SRF3 Alternator Pulley #30684weight
  • SRF Mandatory identification: #30223engine
  • FE FE / FE2 Spring Updates #29689suspension & brakes
  • SRF SRF Shocks, Springs and Ride Height. #29688suspension & brakes
Road America Runoffs 20202020-10-022:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister
12 rule changes (FE: 5, SRF: 5, FE2: 2)4 weight · 3 suspension & brakes · 2 aero · 1 tyres & wheels · 1 wording · 1 othershowhide
  • FE FE Gurney Flap Spec Update #29445aero
  • FE2 FE/FE2 Oil Cooler #29293wording
  • FE FE Gurney flap wicker clarification #28885aero
  • FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes
  • SRF SRF Bump Stop Correction #27019suspension & brakes
  • FE Request for FE / FE2 preparation rules update #27722weight
  • SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • FE FE / FE2 Update Rules #27624weight
  • FE2 FE / FE2 Update Rules #27624weight
  • SRF SRF Tire Warmer Rule #27622tyres & wheels
  • SRF SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF SRF / SRF3 Majors & Regional Class Updates #27723other
Virginia International Raceway Runoffs 20192019-10-051:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost1:54.710Mark Snyder · fastest of 9 · top 5 within 1.3s1:55.648Mark Snyder · fastest of 9 · top 5 within 0.9s135.5James Libecco-2.040squal +0.241s98.3%qual 100.2%1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman-5.534squal -3.407s95.3%qual 97.0%
6 rule changes (FE: 5, SRF: 1)3 tyres & wheels · 1 suspension & brakes · 2 othershowhide
  • FE FE Wet Tire E&O #27365tyres & wheels
  • FE FE Tire Update #27029tyres & wheels
  • SRF SRF Dash Windscreen Kit #27028other
  • FE FE Anti-Roll Bar Clarification #26912suspension & brakes
  • FE FE / FE2 Updated Bubble Tail Rule #26913other
  • FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
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 Osborne1:37.517Mark Snyder · fastest of 10 · top 5 within 1.4s1:38.504Lee Rackley · fastest of 10 · top 5 within 0.8s124.7Quinten Nelson+7.315squal +8.905s108.0%qual 110.0%1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich+4.374squal +6.428s104.8%qual 107.3%
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 3.0s1:39.177Elliot Finlayson · fastest of 35 · top 5 within 1.3s1:39.726Elliot Finlayson · fastest of 35 · top 5 within 0.8s+6.024squal +5.431s106.4%qual 105.8%1:51.573Thomas Kirchman · fastest of 50 · top 5 within 2.8s1:53.769Todd Harris · fastest of 45 · top 5 within 0.2s+20.067squal +17.827s121.4%qual 119.0%
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 1.2s1:27.636Scott Rettich · fastest of 9 · top 5 within 1.7s1:30.563Hanna Zellers · fastest of 9 · top 5 within 2.2s+9.548squal +7.750s111.8%qual 109.7%1:37.344Mike Miserendino · fastest of 27 · top 5 within 0.8s1:37.621Todd Harris · fastest of 27 · top 5 within 0.6s+16.606squal +17.458s120.5%qual 121.9%
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 2.1s1:57.824Scott Rettich · fastest of 16 · top 5 within 1.0s1:59.040Scott Rettich · fastest of 16 · top 5 within 1.3s+7.424squal +7.113s106.7%qual 106.4%2:14.306Cliff White · fastest of 39 · top 5 within 1.2s2:16.700Cliff White · fastest of 38 · top 5 within 0.5s+25.084squal +23.595s122.5%qual 121.3%

By track

TrackEvents Typical % of FB Best Latest 
Road America40 of 4 with FB
Virginia International Raceway3100.0%1 of 3 with FB100.0%Runoffs 2019100.0%Runoffs 2019
Indianapolis Motor Speedway2100.0%1 of 2 with FB100.0%Runoffs 2017100.0%Runoffs 2017
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%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 FB'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.