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BoP Lab / Classes / EP

EP vs FB vs F5 vs SRF3 pace at every track

Lap times across years say as much about the weather as the class. % of EP is each class's best lap as a share of EP'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-SpecEP×vsF5×FAvsFB×FCFE2FFFPFVFXGT1GT2GTXHPPP2SMSMXvsSRF3×STLSTUT1T2T3T4Show 49 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: EP 100.0% of EP Kip Van Steenburg, Daytona International Speedway Runoffs 2015 race · FB 83.7% of EP J R Osborne, Sonoma Raceway Runoffs 2018 qualifying · F5 93.2% of EP Wiley Clinton McMahan, Indianapolis Motor Speedway Runoffs 2017 race · SRF3 94.2% of EP Franklin Futrelle, Virginia International Raceway Runoffs 2022 race

1:402:002:2014 rule changes between Runoffs 2018 and Runoffs 201914 ▾27 rule changes between Runoffs 2019 and Runoffs 202027 ▾23 rule changes between Runoffs 2020 and Runoffs 202123 ▾30 rule changes between Runoffs 2021 and Runoffs 202230 ▾17 rule changes between Runoffs 2022 and Runoffs 202317 ▾24 rule changes between Runoffs 2023 and Runoffs 202424 ▾17 rule changes between Runoffs 2024 and Runoffs 202517 ▾23 rule changes between Runoffs 2025 and Runoffs 202623 ▾EP race best at Runoffs 2015: 2:05.109 (Kip Van Steenburg)EP race best at Runoffs 2016: 1:34.266 (Michael Galati)EP race best at Runoffs 2017: 1:50.396 (Matt Reynolds)EP race best at Runoffs 2018: 1:46.518 (Glen McCready)EP race best at Runoffs 2019: 2:01.631 (Jesse Prather)EP race best at Runoffs 2020: 2:29.047 (Jesse Prather)EP race best at Runoffs 2021: 1:49.928 (Jesse Prather)EP race best at Runoffs 2022: 2:30.855 (Jesse Prather)EP race best at Runoffs 2023: 2:04.050 (Greg Ira)EP race best at Runoffs 2024: 2:27.869 (Tyler Ladd)EP race best at Runoffs 2025: 2:28.756 (Tyler Ladd)EP race best at Runoffs 2026: 2:27.869 (Jon Brakke)EP qualifying best at Runoffs 2015: 2:03.794 (Kip Van Steenburg)EP qualifying best at Runoffs 2016: 1:33.847 (Michael Galati)EP qualifying best at Runoffs 2017: 1:49.597 (Matt Reynolds)EP qualifying best at Runoffs 2018: 1:45.828 (Glen McCready)EP qualifying best at Runoffs 2019: 2:00.987 (Jesse Prather)EP qualifying best at Runoffs 2020: 2:27.322 (Jesse Prather)EP qualifying best at Runoffs 2021: 1:48.181 (Jesse Prather)EP qualifying best at Runoffs 2022: 2:02.326 (Jesse Prather)EP qualifying best at Runoffs 2023: 2:03.215 (John Hainsworth)EP qualifying best at Runoffs 2024: 2:26.803 (Tyler Ladd)EP qualifying best at Runoffs 2025: 2:27.293 (Jon Brakke)EP qualifying best at Runoffs 2026: 2:29.239 (Jon Brakke)FB race best at Runoffs 2015: 1:51.616 (J R Osborne)Off the chart: 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)Off the chart: 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)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)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
EPFBF5SRF3solid race · dashed qualifying · slower is lower
85%90%95%100%105%14 rule changes between Runoffs 2018 and Runoffs 201914 ▾27 rule changes between Runoffs 2019 and Runoffs 202027 ▾23 rule changes between Runoffs 2020 and Runoffs 202123 ▾30 rule changes between Runoffs 2021 and Runoffs 202230 ▾17 rule changes between Runoffs 2022 and Runoffs 202317 ▾24 rule changes between Runoffs 2023 and Runoffs 202424 ▾17 rule changes between Runoffs 2024 and Runoffs 202517 ▾23 rule changes between Runoffs 2025 and Runoffs 202623 ▾EP race best at Runoffs 2015: 100.0% of EP's (Kip Van Steenburg)EP race best at Runoffs 2016: 100.0% of EP's (Michael Galati)EP race best at Runoffs 2017: 100.0% of EP's (Matt Reynolds)EP race best at Runoffs 2018: 100.0% of EP's (Glen McCready)EP race best at Runoffs 2019: 100.0% of EP's (Jesse Prather)EP race best at Runoffs 2020: 100.0% of EP's (Jesse Prather)EP race best at Runoffs 2021: 100.0% of EP's (Jesse Prather)EP race best at Runoffs 2022: 100.0% of EP's (Jesse Prather)EP race best at Runoffs 2023: 100.0% of EP's (Greg Ira)EP race best at Runoffs 2024: 100.0% of EP's (Tyler Ladd)EP race best at Runoffs 2025: 100.0% of EP's (Tyler Ladd)EP race best at Runoffs 2026: 100.0% of EP's (Jon Brakke)EP qualifying best at Runoffs 2015: 100.0% of EP's (Kip Van Steenburg)EP qualifying best at Runoffs 2016: 100.0% of EP's (Michael Galati)EP qualifying best at Runoffs 2017: 100.0% of EP's (Matt Reynolds)EP qualifying best at Runoffs 2018: 100.0% of EP's (Glen McCready)EP qualifying best at Runoffs 2019: 100.0% of EP's (Jesse Prather)EP qualifying best at Runoffs 2020: 100.0% of EP's (Jesse Prather)EP qualifying best at Runoffs 2021: 100.0% of EP's (Jesse Prather)EP qualifying best at Runoffs 2022: 100.0% of EP's (Jesse Prather)EP qualifying best at Runoffs 2023: 100.0% of EP's (John Hainsworth)EP qualifying best at Runoffs 2024: 100.0% of EP's (Tyler Ladd)EP qualifying best at Runoffs 2025: 100.0% of EP's (Jon Brakke)EP qualifying best at Runoffs 2026: 100.0% of EP's (Jon Brakke)FB race best at Runoffs 2015: 89.2% of EP's (J R Osborne)FB race best at Runoffs 2016: 85.9% of EP's (Jeremy Hill)FB race best at Runoffs 2017: 84.9% of EP's (Alex Mayer)FB race best at Runoffs 2018: 85.6% of EP's (J R Osborne)FB race best at Runoffs 2019: 96.8% of EP's (Pete Frost)FB qualifying best at Runoffs 2015: 89.4% of EP's (J R Osborne)FB qualifying best at Runoffs 2016: 85.1% of EP's (Alex Mayer)FB qualifying best at Runoffs 2017: 85.5% of EP's (Gary Hickman)FB qualifying best at Runoffs 2018: 83.7% of EP's (J R Osborne)FB qualifying best at Runoffs 2019: 94.6% of EP's (Pete Frost)F5 race best at Runoffs 2015: 98.6% of EP's (Matthew Strand)F5 race best at Runoffs 2016: 95.3% of EP's (Steven Thompson)F5 race best at Runoffs 2017: 93.2% of EP's (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 96.2% of EP's (David Lapham)F5 race best at Runoffs 2019: 96.7% of EP's (Wiley Mcmahan)F5 race best at Runoffs 2020: 94.9% of EP's (James Weida)F5 race best at Runoffs 2021: 93.8% of EP's (Sven de Vries)F5 race best at Runoffs 2022: 94.0% of EP's (Sven de Vries)F5 qualifying best at Runoffs 2015: 98.4% of EP's (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 94.3% of EP's (Calvin Stewart)F5 qualifying best at Runoffs 2017: 94.1% of EP's (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 96.2% of EP's (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 97.0% of EP's (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 95.7% of EP's (Calvin Stewart)F5 qualifying best at Runoffs 2021: 94.9% of EP's (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 96.2% of EP's (James Weida)SRF3 race best at Runoffs 2015: 104.1% of EP's (Chad Galloway)SRF3 race best at Runoffs 2016: 100.7% of EP's (Cliff White)SRF3 race best at Runoffs 2017: 99.4% of EP's (Tray Ayres)SRF3 race best at Runoffs 2018: 100.5% of EP's (TJ Acker)SRF3 race best at Runoffs 2019: 102.6% of EP's (Bobby Sak)SRF3 race best at Runoffs 2020: 101.3% of EP's (Justin Hille)SRF3 race best at Runoffs 2021: 100.2% of EP's (John Black)SRF3 race best at Runoffs 2022: 94.2% of EP's (Franklin Futrelle)SRF3 race best at Runoffs 2023: 100.7% of EP's (David Ogburn)SRF3 race best at Runoffs 2024: 100.2% of EP's (S Sandy Satullo III)SRF3 race best at Runoffs 2025: 100.7% of EP's (Morgan Burkhard)SRF3 race best at Runoffs 2026: 100.9% of EP's (Peyton Long)SRF3 qualifying best at Runoffs 2015: 103.8% of EP's (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 100.5% of EP's (John Black)SRF3 qualifying best at Runoffs 2017: 100.2% of EP's (John Black)SRF3 qualifying best at Runoffs 2018: 100.3% of EP's (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 103.0% of EP's (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 101.7% of EP's (TJ Acker)SRF3 qualifying best at Runoffs 2021: 101.2% of EP's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 101.1% of EP's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 100.5% of EP's (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 100.7% of EP's (Denny Stripling)SRF3 qualifying best at Runoffs 2025: 100.6% of EP's (Bobby Sak)SRF3 qualifying best at Runoffs 2026: 98.8% of EP's (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
EPFBF5SRF3solid race · dashed qualifying · each class's best lap as a share of EP's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventEPFBF5SRF3
Qual best Race best Trap Qual best Race best Trap vs EP % of EP Qual best Race best Trap vs EP % of EP Qual best Race best Trap vs EP % of EP 
Road America Runoffs 20262026-09-282:29.239Jon Brakke · fastest of 15 · top 5 within 5.2s+1.946s (+1.32%)2:27.869Jon Brakke · fastest of 15 · top 5 within 5.2s-0.887s (-0.60%)137.0Jon Brakke-3.8 mph (-2.7%)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%)+1.388squal -1.796s100.9%qual 98.8%
23 rule changes (EP: 21, SRF3: 2)6 weight · 5 induction · 4 engine · 1 suspension & brakes · 1 tyres & wheels · 3 wording · 3 othershowhide
  • EP Mini Cooper Compression Ratio #40517engine
  • EP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • EP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • EP HP Honda Civic (92-95) #40464weight -70 lbs
  • EP Honda S2000 Hardtop #40138other
  • EP Miata track width - errors and omissions #39976wording
  • EP Triumph GT6 Spec Change. #40098induction
  • SRF3 SRF3 Spark Plugs #39899other
  • EP Request to Update E30 BMW Throttle Body Diameter Verbiage #39363induction
  • EP TR2 Notes E&O #39180weight
  • EP Balance of Power #39187weight +50 lbs
  • EP Please Lower Weight of 280Z #38871weight -160 lbs
  • EP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • EP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • EP HP Volvo 142 spec omission #38994engine
  • EP HP Mini DOHC 1.6 #38996engine
  • EP Add to Rabbit description #39019wording
  • EP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • EP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • EP HP Plymouth Arrow spec omission #38995wording
  • EP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • EP Add TB ID tolerance to general Prod rules #39009induction
  • SRF3 Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:27.293Jon Brakke · fastest of 21 · top 5 within 2.1s+0.490s (+0.33%)2:28.756Tyler Ladd · fastest of 19 · top 5 within 1.9s+0.887s (+0.60%)140.8Jon Brakke+0.1 mph (+0.1%)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%)+1.083squal +0.933s100.7%qual 100.6%
17 rule changes (EP: 14, SRF3: 3)8 weight · 3 induction · 1 cars added · 1 wording · 4 othershowhide
  • SRF3 SRF Rule Updates #38853weight
  • EP BMW Z4 update #38490induction
  • EP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • EP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
  • EP Request for Classification of Chevrolet Spark #37755cars added
  • EP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • SRF3 Driver Safety & Comfort #37966other
  • SRF3 Update SADEV transmission specs #37992other
  • EP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • EP Interpretation of Production Rules on Mirrors #37235other
  • EP Weight Reduction for Honda S2000 #37466weight
  • EP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • EP Effective date for Jan 2025 GCR updates #37654induction
  • EP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • EP Triumph GT6 Adjustments #37112weight
  • EP 1275 HP Spridget Level 2 Only #36518other
  • EP NA Miata Track Width Correction #36902wording
Road America Runoffs 20242024-10-012:26.803Tyler Ladd · fastest of 16 · top 5 within 4.1s-0.519s (-0.35%)2:27.869Tyler Ladd · fastest of 16 · top 5 within 3.6s-1.178s (-0.79%)140.7Bill Miller-1.0 mph (-0.7%)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%)+0.260squal +0.970s100.2%qual 100.7%
24 rule changes (EP: 14, SRF3: 10)9 weight · 3 suspension & brakes · 3 tyres & wheels · 2 cars added · 2 engine · 1 induction · 1 wording · 3 othershowhide
  • SRF3 Update SRF3 Air Filter Rule #36681other
  • SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF3 Hoosier Tire Decal Placement #36739tyres & wheels
  • SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels
  • EP Errant entry in HP production line item #36231other
  • SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • EP NIssan 300ZX Z31 to EP #35830cars added
  • EP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • EP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • SRF3 SRF3 Alternator Pulley Update In #36095weight
  • EP GCR Correction - Redundant HP Spec Lines #35623engine
  • EP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • EP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • EP Miata Alternate Head #35253weight -50 lbs
  • EP Triumph GT6 Adjustments #35255weight
  • EP Honda S2000 throttle body #35272induction
  • EP Correction within Triumph TR8 Spec Line #35315engine
  • EP Correction to EP 924S/944 Spec Line #35317weight
  • SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF3 SRF / SRF3 Rule Updates #35268weight
  • EP Porsche 944/924S Rule Change Request #35002weight
  • EP Triumph GT6 Adjustments #35054weight -30 lbs
  • SRF3 SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-232:03.215John Hainsworth · fastest of 24 · top 5 within 4.3s+0.889s (+0.73%)2:04.050Greg Ira · fastest of 22 · top 5 within 5.3s-26.805s (-17.77%)144.6Greg Ira+3.1 mph (+2.2%)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%)+0.861squal +0.627s100.7%qual 100.5%
17 rule changes (EP: 13, SRF3: 4)3 engine · 3 induction · 3 suspension & brakes · 3 tyres & wheels · 2 weight · 1 wording · 2 othershowhide
  • EP Hub Note Clean Up In EP TR8 Spec Line #34649wording
  • EP Triumph GT6 Adjustments #34662other
  • EP Triumph GT6 Adjustments: Brakes #34663suspension & brakes
  • EP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • EP 914-6 Valve Size Correction #34185engine
  • SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • EP Investigate Parity of Z3 #33343induction
  • SRF3 Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels
  • EP Revise 79-85 RX7 Brake Spec Line Allowance #33293suspension & brakes
  • EP Request alternate carburetors for EP 280z #33405engine
  • EP Fuel Injection 12a Mazda RX3 #33434engine
  • EP Mazda RX3 - Weight Reduction #33436weight -50 lbs
  • EP Request TR8 Dry Sump Allowance #33460other
  • EP Review Limited Prep Port Matching Rules #33600induction
  • EP 280ZX Classification Request #33611weight
Virginia International Raceway Runoffs 20222022-09-242:02.326Jesse Prather · fastest of 17 · top 5 within 3.2s+1.339s (+1.11%)2:30.855Jesse Prather · fastest of 15 · top 5 within 2.5s+29.224s (+24.03%)141.5Jesse Prather-6.0 mph (-4.1%)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%)-8.993squal -4.637s94.0%qual 96.2%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%)-8.789squal +1.390s94.2%qual 101.1%
30 rule changes (EP: 21, F5: 6, SRF3: 3)8 induction · 6 engine · 4 weight · 3 cars added · 3 tyres & wheels · 1 suspension & brakes · 1 wording · 4 othershowhide
  • EP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • EP Request Rotary Injection on Dual Y manifold #32775engine
  • EP Request for Corrado Stroke & Displacement Correction #32985engine
  • F5 Intake Boots Correction #33028induction
  • F5 Ensure availability of ECU for Rotax engines #32695engine
  • F5 Clarify stepped exhaust header references #32743engine
  • EP Subaru BRZ Model Years #32500other
  • F5 593 carb boot availability and oil pump clarification #32527induction
  • SRF3 SRF Tire Rule Update #32614tyres & wheels
  • SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes
  • EP EP MX-5 Global Cup Car #32218weight
  • EP Please Class BMW 128i in EP #32370cars added
  • EP Inconsistency in Body Work Descriptions #32396other
  • EP Mazda RX8 with 13b Rotary #32170induction
  • EP Request Idle control valve clarification #32178engine
  • EP EP Adjustments #31858induction
  • EP 1999 3.8L Ford Mustang to EP? #31635weight
  • EP Improved Touring Tires #32064tyres & wheels
  • F5 E&O class name #32194other
  • EP Throttle Body and Idle Air #31800induction
  • EP Porsche 968 Engine Questions #31831engine
  • EP Request weight reduction for 1979-1985 Mazda RX-7 #31833weight
  • EP Porsche 968 Engine Questions #31478induction
  • EP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • EP BMW Z3 2.5L Spec Line #31724induction
  • F5 Data Box Mounting Plate #31638other
  • EP 944S2 Restrictor #31396induction
  • EP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • SRF3 Three Updates to SRF Rules #31523weight
  • EP E&O; MR2 Track #31120wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:48.181Jesse Prather · fastest of 31 · top 5 within 3.2s-1.416s (-1.29%)1:49.928Jesse Prather · fastest of 27 · top 5 within 0.9s-0.468s (-0.42%)143.4Jon Brakke1:42.619Ryan 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-6.788squal -5.562s93.8%qual 94.9%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+0.167squal +1.339s100.2%qual 101.2%
23 rule changes (EP: 14, F5: 3, SRF3: 6)6 weight · 5 engine · 3 cars added · 3 suspension & brakes · 2 tyres & wheels · 1 induction · 2 wording · 1 othershowhide
  • EP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • EP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • F5 Clarify allowable assisted shifting systems #30871wording
  • F5 Request to correct terminology #30976tyres & wheels
  • SRF3 SRF Wet Tires #30849tyres & wheels
  • SRF3 SADEV-SRF3 Transmission #30926other
  • SRF3 SRF Update Maintenance, Repairs and Seals #30961engine
  • EP Lotus/Caterham 7 America Request #30392engine
  • EP Reclassify Daimler SP 250 #30721cars added
  • EP Clarify Application of Percentage Based Weight Penalties #30669weight
  • F5 Request to Allow Rotax 593 HO Engine #30712engine
  • SRF3 SRF3 Alternator Pulley #30684weight
  • EP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • EP Fiat X1/9 brake rotors #30423suspension & brakes
  • EP NC MX-5 year range correction E&O #30503wording
  • EP Please Classify Mazda3 in FP #30165cars added
  • SRF3 Mandatory identification: #30223engine
  • EP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • EP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • EP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • EP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • EP EP TR8 Adjustment #29512weight -100 lbs
  • SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
Road America Runoffs 20202020-10-022:27.322Jesse Prather · fastest of 20 · top 5 within 2.5s2:29.047Jesse Prather · fastest of 20 · top 5 within 2.8s141.7Jesse Prather2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s2:21.391James Weida · fastest of 14 · top 5 within 1.5s143.2Aaron Ellis-7.656squal -6.368s94.9%qual 95.7%2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s131.9Charles Russell Turner+1.991squal +2.464s101.3%qual 101.7%
27 rule changes (EP: 14, F5: 6, SRF3: 7)6 engine · 6 induction · 5 suspension & brakes · 2 cars added · 2 tyres & wheels · 1 weight · 1 wording · 4 othershowhide
  • EP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • F5 Request to Update Suzuki Engine Years for F500 #29453engine
  • EP EP BMW Z3 Rule Clarification #28998engine
  • EP Request to Classify Porsche 911 2.0L #28456cars added
  • 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
  • EP BMW Cylinder Head Casting and Part Numbers #28708engine
  • SRF3 SRF Shocks #28791suspension & brakes
  • EP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • EP Error in Mini Cooper Spec Line #28713wording
  • SRF3 Update Bump Stop Rule #28712suspension & brakes
  • SRF3 SRF Bump Stop Correction #27019suspension & brakes
  • EP Caterham 7 Spec Line #28498engine
  • EP Request to Review Horsepower Parity #27662induction
  • EP E36 (92-95) Brakes Errors and Omissions #28058suspension & brakes
  • EP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • EP Add Throttle Body Size these EP BMW Spec Lines #28422induction
  • EP Request for Help for Datsun 1200 #27934induction
  • EP Request to List Mazda Miata Throttle Body Size #27907induction
  • F5 Change 600cc restrictor size #27883induction
  • SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • EP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
  • 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 20192019-10-052:00.987Jesse Prather · fastest of 29 · top 5 within 2.2s2:01.631Jesse Prather · fastest of 24 · top 5 within 1.4s147.5Kip Van Steenburg1:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost-3.943squal -6.518s96.8%qual 94.6%1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s142.8Eric McRee-4.059squal -3.626s96.7%qual 97.0%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+3.124squal +3.637s102.6%qual 103.0%
14 rule changes (EP: 10, F5: 1, SRF3: 3)2 induction · 2 suspension & brakes · 2 weight · 1 cars added · 1 engine · 1 tyres & wheels · 1 wording · 4 othershowhide
  • EP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • EP Request to classify the GMX5 2019 #27263cars added
  • EP level one susp. component rule #27270suspension & brakes
  • EP Clarification of Carb Rules - Prep 1 #27300induction
  • EP Clarification of Carb Rules - Prep 2 #27301induction
  • F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs
  • EP Request Miata Eligibility - 2003 #27121other
  • SRF3 SRF Dash Windscreen Kit #27028other
  • SRF3 New SRF Sectional Nose Rule Addition #26914other
  • EP Allow Firewall Modification for Fitment of 13B into RX8 #26726engine
  • SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes
  • EP Rollcenter Correction Clarification #25873tyres & wheels
  • EP Hardtops #26476wording
  • EP Request for Competition Adjustment for 2nd Generation RX7 #25935weight -50 lbs
Sonoma Raceway Runoffs 20182018-10-101:45.828Glen McCready · fastest of 18 · top 5 within 4.3s1:46.518Glen McCready · fastest of 16 · top 5 within 2.8s106.5Aaron Downey1:28.612J R Osborne · fastest of 7 · top 5 within 3.3s1:31.189J R Osborne · fastest of 7 · top 5 within 3.7s140.5J R Osborne-15.329squal -17.216s85.6%qual 83.7%1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s1:42.491David Lapham · fastest of 5 · top 5 within 9.5s113.3David Lapham-4.027squal -4.021s96.2%qual 96.2%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+0.535squal +0.289s100.5%qual 100.3%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:49.597Matt Reynolds · fastest of 44 · top 5 within 1.2s1:50.396Matt Reynolds · fastest of 45 · top 5 within 0.5s1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s-16.694squal -15.851s84.9%qual 85.5%1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s-7.536squal -6.461s93.2%qual 94.1%1:49.824John Black · fastest of 101 · top 5 within 0.5s1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s-0.614squal +0.227s99.4%qual 100.2%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:33.847Michael Galati · fastest of 25 · top 5 within 0.8s1:34.266Michael Galati · fastest of 23 · top 5 within 1.3s1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s-13.251squal -13.961s85.9%qual 85.1%1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s-4.413squal -5.319s95.3%qual 94.3%1:34.363John Black · fastest of 41 · top 5 within 0.5s1:34.947Cliff White · fastest of 39 · top 5 within 0.3s+0.681squal +0.516s100.7%qual 100.5%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:03.794Kip Van Steenburg · fastest of 29 · top 5 within 3.2s2:05.109Kip Van Steenburg · fastest of 28 · top 5 within 3.3s1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s-13.493squal -13.083s89.2%qual 89.4%2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s-1.811squal -1.970s98.6%qual 98.4%2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s+5.106squal +4.763s104.1%qual 103.8%

By track

TrackEvents Typical % of EP Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
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 EP'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.