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BoP Lab / Classes / FE

FE vs F5 vs SRF vs SRF3 pace at every track

Lap times across years say as much about the weather as the class. % of FE is each class's best lap as a share of FE'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-SpecEPvsF5×FAFCFE×FE2FFFPFVFXGT1GT2GTXHPPP2SMSMXvsSRF×vsSRF3×STLSTUT1T2T3T4Show 48 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: FE 100.0% of FE Scott Rettich, Daytona International Speedway Runoffs 2015 race · F5 99.2% of FE Steven Thompson, Mid-Ohio Sports Car Course Runoffs 2016 race · SRF 107.8% of FE Todd Harris, Mid-Ohio Sports Car Course Runoffs 2016 race · SRF3 104.8% of FE Cliff White, Mid-Ohio Sports Car Course Runoffs 2016 race

1:402:002:2010 rule changes between Runoffs 2018 and Runoffs 201910 ▾23 rule changes between Runoffs 2019 and Runoffs 202023 ▾19 rule changes between Runoffs 2020 and Runoffs 202119 ▾16 rule changes between Runoffs 2021 and Runoffs 202216 ▾10 rule changes between Runoffs 2022 and Runoffs 202310 ▾25 rule changes between Runoffs 2023 and Runoffs 202425 ▾7 rule changes between Runoffs 2024 and Runoffs 20257 ▾7 rule changes between Runoffs 2025 and Runoffs 20267 ▾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)F5 race best at Runoffs 2015: 2:03.298 (Matthew Strand)F5 race best at Runoffs 2016: 1:29.853 (Steven Thompson)F5 race best at Runoffs 2017: 1:42.860 (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 1:42.491 (David Lapham)F5 race best at Runoffs 2019: 1:57.572 (Wiley Mcmahan)F5 race best at Runoffs 2020: 2:21.391 (James Weida)F5 race best at Runoffs 2021: 1:43.140 (Sven de Vries)F5 race best at Runoffs 2022: 2:21.862 (Sven de Vries)F5 qualifying best at Runoffs 2015: 2:01.824 (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 1:28.528 (Calvin Stewart)F5 qualifying best at Runoffs 2017: 1:43.136 (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 1:41.807 (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 1:57.361 (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 2:20.954 (Calvin Stewart)F5 qualifying best at Runoffs 2021: 1:42.619 (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 1:57.689 (James Weida)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)SRF3 race best at Runoffs 2015: 2:10.215 (Chad Galloway)SRF3 race best at Runoffs 2016: 1:34.947 (Cliff White)SRF3 race best at Runoffs 2017: 1:49.782 (Tray Ayres)SRF3 race best at Runoffs 2018: 1:47.053 (TJ Acker)SRF3 race best at Runoffs 2019: 2:04.755 (Bobby Sak)SRF3 race best at Runoffs 2020: 2:31.038 (Justin Hille)SRF3 race best at Runoffs 2021: 1:50.095 (John Black)SRF3 race best at Runoffs 2022: 2:22.066 (Franklin Futrelle)SRF3 race best at Runoffs 2023: 2:04.911 (David Ogburn)SRF3 race best at Runoffs 2024: 2:28.129 (S Sandy Satullo III)SRF3 race best at Runoffs 2025: 2:29.839 (Morgan Burkhard)SRF3 race best at Runoffs 2026: 2:29.257 (Peyton Long)SRF3 qualifying best at Runoffs 2015: 2:08.557 (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 1:34.363 (John Black)SRF3 qualifying best at Runoffs 2017: 1:49.824 (John Black)SRF3 qualifying best at Runoffs 2018: 1:46.117 (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 2:04.624 (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 2:29.786 (TJ Acker)SRF3 qualifying best at Runoffs 2021: 1:49.520 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 2:03.716 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 2:03.842 (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 2:27.773 (Denny Stripling)SRF3 qualifying best at Runoffs 2025: 2:28.226 (Bobby Sak)SRF3 qualifying best at Runoffs 2026: 2:27.443 (Tyler Stephens)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
FEF5SRFSRF3solid race · dashed qualifying · slower is lower
100%105%110%115%10 rule changes between Runoffs 2018 and Runoffs 201910 ▾23 rule changes between Runoffs 2019 and Runoffs 202023 ▾19 rule changes between Runoffs 2020 and Runoffs 202119 ▾16 rule changes between Runoffs 2021 and Runoffs 202216 ▾10 rule changes between Runoffs 2022 and Runoffs 202310 ▾25 rule changes between Runoffs 2023 and Runoffs 202425 ▾7 rule changes between Runoffs 2024 and Runoffs 20257 ▾7 rule changes between Runoffs 2025 and Runoffs 20267 ▾FE race best at Runoffs 2015: 100.0% of FE's (Scott Rettich)FE race best at Runoffs 2016: 100.0% of FE's (Hanna Zellers)FE race best at Runoffs 2017: 100.0% of FE's (Elliot Finlayson)FE race best at Runoffs 2018: 100.0% of FE's (Lee Rackley)FE race best at Runoffs 2019: 100.0% of FE's (Mark Snyder)FE qualifying best at Runoffs 2015: 100.0% of FE's (Scott Rettich)FE qualifying best at Runoffs 2016: 100.0% of FE's (Scott Rettich)FE qualifying best at Runoffs 2017: 100.0% of FE's (Elliot Finlayson)FE qualifying best at Runoffs 2018: 100.0% of FE's (Mark Snyder)FE qualifying best at Runoffs 2019: 100.0% of FE's (Mark Snyder)F5 race best at Runoffs 2015: 103.6% of FE's (Matthew Strand)F5 race best at Runoffs 2016: 99.2% of FE's (Steven Thompson)F5 race best at Runoffs 2017: 103.1% of FE's (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 104.0% of FE's (David Lapham)F5 race best at Runoffs 2019: 101.7% of FE's (Wiley Mcmahan)F5 qualifying best at Runoffs 2015: 103.4% of FE's (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 101.0% of FE's (Calvin Stewart)F5 qualifying best at Runoffs 2017: 104.0% of FE's (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 104.4% of FE's (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 102.3% of FE's (Wiley Mcmahan)SRF race best at Runoffs 2015: 114.8% of FE's (Cliff White)SRF race best at Runoffs 2016: 107.8% of FE's (Todd Harris)SRF race best at Runoffs 2017: 114.1% of FE's (Todd Harris)SRF qualifying best at Runoffs 2015: 114.0% of FE's (Cliff White)SRF qualifying best at Runoffs 2016: 111.1% of FE's (Mike Miserendino)SRF qualifying best at Runoffs 2017: 112.5% of FE's (Thomas Kirchman)SRF3 race best at Runoffs 2015: 109.4% of FE's (Chad Galloway)SRF3 race best at Runoffs 2016: 104.8% of FE's (Cliff White)SRF3 race best at Runoffs 2017: 110.1% of FE's (Tray Ayres)SRF3 race best at Runoffs 2018: 108.7% of FE's (TJ Acker)SRF3 race best at Runoffs 2019: 107.9% of FE's (Bobby Sak)SRF3 qualifying best at Runoffs 2015: 109.1% of FE's (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 107.7% of FE's (John Black)SRF3 qualifying best at Runoffs 2017: 110.7% of FE's (John Black)SRF3 qualifying best at Runoffs 2018: 108.8% of FE's (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 108.6% of FE's (Brian Schofield)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
FEF5SRFSRF3solid race · dashed qualifying · each class's best lap as a share of FE's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFEF5SRFSRF3
Qual best Race best Trap Qual best Race best Trap vs FE % of FE Qual best Race best Trap vs FE % of FE Qual best Race best Trap vs FE % of FE 
Road America Runoffs 20262026-09-282:27.443Tyler 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%)
7 rule changes (FE: 2, SRF: 3, SRF3: 2)1 engine · 1 suspension & brakes · 5 othershowhide
  • SRF GCR Rain/Brake Light Correction #40579suspension & brakes
  • SRF SRF3 Spark Plugs #39899other
  • SRF3 SRF3 Spark Plugs #39899other
  • FE FE & FE2 Rule Updates #39484engine
  • FE FE & FE2 Bubble Tail #38978other
  • SRF Add HD Oil Cooler #38979other
  • SRF3 Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:28.226Bobby 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%)
7 rule changes (FE: 2, SRF: 2, SRF3: 3)2 weight · 1 suspension & brakes · 4 othershowhide
  • FE FE & FE2 Rule Updates #38901weight
  • SRF3 SRF Rule Updates #38853weight
  • SRF Driver Safety & Comfort #37966other
  • SRF Update SADEV transmission specs #37992other
  • SRF3 Driver Safety & Comfort #37966other
  • SRF3 Update SADEV transmission specs #37992other
  • FE Brake Line to A-Arm Covers #37110suspension & brakes
Road America Runoffs 20242024-10-012:27.773Denny 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%)
25 rule changes (FE: 5, SRF: 10, SRF3: 10)8 tyres & wheels · 6 suspension & brakes · 3 weight · 2 wording · 6 othershowhide
  • SRF Update SRF3 Air Filter Rule #36681other
  • SRF Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF Hoosier Tire Decal Placement #36739tyres & wheels
  • SRF3 Update SRF3 Air Filter Rule #36681other
  • SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF3 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
  • SRF3 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
  • SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • SRF3 SRF3 Alternator Pulley Update In #36095weight
  • 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
  • SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF3 SRF / SRF3 Rule Updates #35268weight
  • SRF SRF Radiator Rule Update #34805other
  • SRF3 SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-232:03.842Morgan 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%)
10 rule changes (FE: 3, SRF: 3, SRF3: 4)5 tyres & wheels · 3 suspension & brakes · 1 aero · 1 othershowhide
  • SRF Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • SRF Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • FE Update FE SADEV Transmission Rule #33883other
  • SRF Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels
  • FE Brake bias adjuster clarification #33084suspension & brakes
  • FE FE Front and Rear Wing Update & Clarification #33089aero
Virginia International Raceway Runoffs 20222022-09-241:57.689James 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%)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%)
16 rule changes (FE: 4, F5: 6, SRF: 3, SRF3: 3)4 engine · 3 tyres & wheels · 2 induction · 2 suspension & brakes · 2 weight · 3 othershowhide
  • F5 Intake Boots Correction #33028induction
  • FE Engine Heat Shield & Insulation #33019engine
  • F5 Ensure availability of ECU for Rotax engines #32695engine
  • F5 Clarify stepped exhaust header references #32743engine
  • F5 593 carb boot availability and oil pump clarification #32527induction
  • 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
  • SRF3 SRF Tire Rule Update #32614tyres & wheels
  • SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes
  • F5 E&O class name #32194other
  • F5 Data Box Mounting Plate #31638other
  • FE Two FE2 Rule Updates #31524other
  • SRF Three Updates to SRF Rules #31523weight
  • SRF3 Three Updates to SRF Rules #31523weight
Indianapolis Motor Speedway Runoffs 20212021-09-251:42.619Ryan 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 Weida1:49.520Franklin 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
19 rule changes (FE: 4, F5: 3, SRF: 6, SRF3: 6)5 engine · 4 tyres & wheels · 3 suspension & brakes · 2 weight · 2 wording · 3 othershowhide
  • F5 Clarify allowable assisted shifting systems #30871wording
  • F5 Request to correct terminology #30976tyres & wheels
  • SRF SRF Wet Tires #30849tyres & wheels
  • SRF SADEV-SRF3 Transmission #30926other
  • SRF SRF Update Maintenance, Repairs and Seals #30961engine
  • SRF3 SRF Wet Tires #30849tyres & wheels
  • SRF3 SADEV-SRF3 Transmission #30926other
  • SRF3 SRF Update Maintenance, Repairs and Seals #30961engine
  • FE FE Tire Rule Changes #30754tyres & wheels
  • FE Radiator Screens Clarification #30792wording
  • F5 Request to Allow Rotax 593 HO Engine #30712engine
  • FE FE Radiator Screens #30575other
  • SRF SRF3 Alternator Pulley #30684weight
  • SRF3 SRF3 Alternator Pulley #30684weight
  • SRF Mandatory identification: #30223engine
  • SRF3 Mandatory identification: #30223engine
  • FE FE / FE2 Spring Updates #29689suspension & brakes
  • SRF SRF Shocks, Springs and Ride Height. #29688suspension & brakes
  • SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
Road America Runoffs 20202020-10-022:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s2:21.391James Weida · fastest of 14 · top 5 within 1.5s143.2Aaron Ellis2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s131.9Charles Russell Turner
23 rule changes (FE: 5, F5: 6, SRF: 5, SRF3: 7)7 suspension & brakes · 4 weight · 2 aero · 2 engine · 2 tyres & wheels · 1 induction · 5 othershowhide
  • F5 Request to Update Suzuki Engine Years for F500 #29453engine
  • FE FE Gurney Flap Spec Update #29445aero
  • F5 Request for Cockpit Adjustment of External Jetting Devices #28359other
  • F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine
  • F5 Re letter requesting driver adjustable carb mixture #28840other
  • F5 #28359 WDYT Request for Cockpit Adjustment #28875other
  • FE FE Gurney flap wicker clarification #28885aero
  • SRF3 SRF Shocks #28791suspension & brakes
  • FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes
  • SRF SRF Bump Stop Correction #27019suspension & brakes
  • SRF3 Update Bump Stop Rule #28712suspension & brakes
  • SRF3 SRF Bump Stop Correction #27019suspension & brakes
  • F5 Change 600cc restrictor size #27883induction
  • FE Request for FE / FE2 preparation rules update #27722weight
  • SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • FE 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
  • SRF3 SRF Tire Warmer Rule #27622tyres & wheels
  • SRF3 SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF3 SRF / SRF3 Majors & Regional Class Updates #27723other
Virginia International Raceway Runoffs 20192019-10-051:54.710Mark Snyder · fastest of 9 · top 5 within 1.3s1:55.648Mark Snyder · fastest of 9 · top 5 within 0.9s135.5James Libecco1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s142.8Eric McRee+1.924squal +2.651s101.7%qual 102.3%2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s132.4Bobby Sak+9.107squal +9.914s107.9%qual 108.6%
10 rule changes (FE: 5, F5: 1, SRF: 1, SRF3: 3)3 tyres & wheels · 2 suspension & brakes · 1 weight · 4 othershowhide
  • FE FE Wet Tire E&O #27365tyres & wheels
  • F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs
  • FE FE Tire Update #27029tyres & wheels
  • SRF SRF Dash Windscreen Kit #27028other
  • SRF3 SRF Dash Windscreen Kit #27028other
  • FE FE Anti-Roll Bar Clarification #26912suspension & brakes
  • FE FE / FE2 Updated Bubble Tail Rule #26913other
  • SRF3 New SRF Sectional Nose Rule Addition #26914other
  • SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes
  • FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
Sonoma Raceway Runoffs 20182018-10-101:37.517Mark Snyder · fastest of 10 · top 5 within 1.4s1:38.504Lee Rackley · fastest of 10 · top 5 within 0.8s124.7Quinten Nelson1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s1:42.491David Lapham · fastest of 5 · top 5 within 9.5s113.3David Lapham+3.987squal +4.290s104.0%qual 104.4%1:46.117Robeson Clay Russell · fastest of 36 · top 5 within 0.5s1:47.053TJ Acker · fastest of 35 · top 5 within 0.2s110.2Steve Fogg+8.549squal +8.600s108.7%qual 108.8%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:39.177Elliot Finlayson · fastest of 35 · top 5 within 1.3s1:39.726Elliot Finlayson · fastest of 35 · top 5 within 0.8s1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s+3.134squal +3.959s103.1%qual 104.0%1:51.573Thomas Kirchman · fastest of 50 · top 5 within 2.8s1:53.769Todd Harris · fastest of 45 · top 5 within 0.2s+14.043squal +12.396s114.1%qual 112.5%1:49.824John Black · fastest of 101 · top 5 within 0.5s1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s+10.056squal +10.647s110.1%qual 110.7%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:27.636Scott Rettich · fastest of 9 · top 5 within 1.7s1:30.563Hanna Zellers · fastest of 9 · top 5 within 2.2s1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s-0.710squal +0.892s99.2%qual 101.0%1:37.344Mike Miserendino · fastest of 27 · top 5 within 0.8s1:37.621Todd Harris · fastest of 27 · top 5 within 0.6s+7.058squal +9.708s107.8%qual 111.1%1:34.363John Black · fastest of 41 · top 5 within 0.5s1:34.947Cliff White · fastest of 39 · top 5 within 0.3s+4.384squal +6.727s104.8%qual 107.7%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:57.824Scott Rettich · fastest of 16 · top 5 within 1.0s1:59.040Scott Rettich · fastest of 16 · top 5 within 1.3s2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s+4.258squal +4.000s103.6%qual 103.4%2:14.306Cliff White · fastest of 39 · top 5 within 1.2s2:16.700Cliff White · fastest of 38 · top 5 within 0.5s+17.660squal +16.482s114.8%qual 114.0%2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s+11.175squal +10.733s109.4%qual 109.1%

By track

TrackEvents Typical % of FE Best Latest 
Road America40 of 4 with FE
Virginia International Raceway3100.0%1 of 3 with FE100.0%Runoffs 2019100.0%Runoffs 2019
Indianapolis Motor Speedway2100.0%1 of 2 with FE100.0%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 FE'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.