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BoP Lab / Classes / SM

SM vs FE2 vs FB vs FP pace at every track

Lap times across years say as much about the weather as the class. % of SM is each class's best lap as a share of SM'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-SpecEPFAvsFB×FCvsFE2×FFvsFP×FVFXGT1GT2GTXHPPP2SM×SMXSRF3STLSTUT1T2T3T4Show 59 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: SM 100.0% of SM Todd Lamb, Daytona International Speedway Runoffs 2015 race · FE2 81.0% of SM Franklin Futrelle, Road America Runoffs 2026 race · FB 77.5% of SM J R Osborne, Daytona International Speedway Runoffs 2015 race · FP 91.9% of SM Kevin Ruck, Daytona International Speedway Runoffs 2015 race

1:201:402:002:202:4013 rule changes between Runoffs 2018 and Runoffs 201913 ▾23 rule changes between Runoffs 2019 and Runoffs 202023 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾7 rule changes between Runoffs 2022 and Runoffs 20237 ▾25 rule changes between Runoffs 2023 and Runoffs 202425 ▾22 rule changes between Runoffs 2024 and Runoffs 202522 ▾37 rule changes between Runoffs 2025 and Runoffs 202637 ▾SM race best at Runoffs 2015: 2:24.067 (Todd Lamb)SM race best at Runoffs 2016: 1:40.764 (Michael Carter)SM race best at Runoffs 2017: 1:59.100 (Michael Gagliardo)SM race best at Runoffs 2018: 1:55.278 (Michael Carter)SM race best at Runoffs 2019: 2:16.459 (Elivan Goulart)SM race best at Runoffs 2020: 2:43.748 (Preston Pardus)SM race best at Runoffs 2021: 1:58.837 (Brian Henderson)SM race best at Runoffs 2022: 2:19.107 (Travis Wiley)SM race best at Runoffs 2023: 2:16.229 (Julian DaCosta)SM race best at Runoffs 2024: 2:41.486 (Brett Kowalski)SM race best at Runoffs 2025: 2:44.430 (Kyle Greenhill)SM race best at Runoffs 2026: 2:42.725 (Francisco Barroso)SM qualifying best at Runoffs 2015: 2:18.661 (Andrew Carbonell)SM qualifying best at Runoffs 2016: 1:40.514 (Justin Hille)SM qualifying best at Runoffs 2017: 1:58.306 (Chris Haldeman)SM qualifying best at Runoffs 2018: 1:54.355 (Ken Sutherland)SM qualifying best at Runoffs 2019: 2:14.552 (Todd Buras)SM qualifying best at Runoffs 2020: 2:42.209 (Kyle Greenhill)SM qualifying best at Runoffs 2021: 1:57.695 (Brian Henderson)SM qualifying best at Runoffs 2022: 2:14.664 (Danny Steyn)SM qualifying best at Runoffs 2023: 2:14.986 (Danny Steyn)SM qualifying best at Runoffs 2024: 2:41.106 (Ethan Goulart)SM qualifying best at Runoffs 2025: 2:43.111 (Bobby Gossett)SM qualifying best at Runoffs 2026: 2:42.173 (Brett Kowalski)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)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)FP race best at Runoffs 2015: 2:12.419 (Kevin Ruck)FP race best at Runoffs 2016: 1:36.399 (John Walker)FP race best at Runoffs 2017: 1:53.007 (Eric Prill)FP race best at Runoffs 2018: 1:48.481 (Joe Huffaker)FP race best at Runoffs 2019: 2:08.076 (Eric Prill)FP race best at Runoffs 2020: 2:34.033 (Kevin Ruck)FP race best at Runoffs 2021: 1:59.933 (Cliff Ira)FP race best at Runoffs 2022: 2:17.641 (Mason Workman)FP race best at Runoffs 2023: 2:07.787 (Cliff Ira)FP race best at Runoffs 2024: 2:33.246 (Kevin Ruck)FP race best at Runoffs 2025: 2:34.271 (Chris Bovis)FP race best at Runoffs 2026: 2:33.240 (David Strittmatter)FP qualifying best at Runoffs 2015: 2:11.009 (Kevin Ruck)FP qualifying best at Runoffs 2016: 1:35.938 (John Walker)FP qualifying best at Runoffs 2017: 1:52.091 (Eric Prill)FP qualifying best at Runoffs 2018: 1:47.588 (Joe Huffaker)FP qualifying best at Runoffs 2019: 2:07.436 (Eric Prill)FP qualifying best at Runoffs 2020: 2:31.414 (Ethan Shippert)FP qualifying best at Runoffs 2021: 1:51.082 (Craig Chima)FP qualifying best at Runoffs 2022: 2:06.217 (Eric Prill)FP qualifying best at Runoffs 2023: 2:08.248 (Cliff Ira)FP qualifying best at Runoffs 2024: 2:32.327 (Cliff Ira)FP qualifying best at Runoffs 2025: 2:32.395 (David Strittmatter)FP qualifying best at Runoffs 2026: 2:33.275 (Stephen Simonds)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
SMFE2FBFPsolid race · dashed qualifying · slower is lower
80%85%90%95%100%13 rule changes between Runoffs 2018 and Runoffs 201913 ▾23 rule changes between Runoffs 2019 and Runoffs 202023 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾7 rule changes between Runoffs 2022 and Runoffs 20237 ▾25 rule changes between Runoffs 2023 and Runoffs 202425 ▾22 rule changes between Runoffs 2024 and Runoffs 202522 ▾37 rule changes between Runoffs 2025 and Runoffs 202637 ▾SM race best at Runoffs 2015: 100.0% of SM's (Todd Lamb)SM race best at Runoffs 2016: 100.0% of SM's (Michael Carter)SM race best at Runoffs 2017: 100.0% of SM's (Michael Gagliardo)SM race best at Runoffs 2018: 100.0% of SM's (Michael Carter)SM race best at Runoffs 2019: 100.0% of SM's (Elivan Goulart)SM race best at Runoffs 2020: 100.0% of SM's (Preston Pardus)SM race best at Runoffs 2021: 100.0% of SM's (Brian Henderson)SM race best at Runoffs 2022: 100.0% of SM's (Travis Wiley)SM race best at Runoffs 2023: 100.0% of SM's (Julian DaCosta)SM race best at Runoffs 2024: 100.0% of SM's (Brett Kowalski)SM race best at Runoffs 2025: 100.0% of SM's (Kyle Greenhill)SM race best at Runoffs 2026: 100.0% of SM's (Francisco Barroso)SM qualifying best at Runoffs 2015: 100.0% of SM's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 100.0% of SM's (Justin Hille)SM qualifying best at Runoffs 2017: 100.0% of SM's (Chris Haldeman)SM qualifying best at Runoffs 2018: 100.0% of SM's (Ken Sutherland)SM qualifying best at Runoffs 2019: 100.0% of SM's (Todd Buras)SM qualifying best at Runoffs 2020: 100.0% of SM's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 100.0% of SM's (Brian Henderson)SM qualifying best at Runoffs 2022: 100.0% of SM's (Danny Steyn)SM qualifying best at Runoffs 2023: 100.0% of SM's (Danny Steyn)SM qualifying best at Runoffs 2024: 100.0% of SM's (Ethan Goulart)SM qualifying best at Runoffs 2025: 100.0% of SM's (Bobby Gossett)SM qualifying best at Runoffs 2026: 100.0% of SM's (Brett Kowalski)FE2 race best at Runoffs 2018: 82.9% of SM's (Flinn Lazier)FE2 race best at Runoffs 2019: 82.2% of SM's (Liam Snyder)FE2 race best at Runoffs 2020: 81.4% of SM's (Owen McAllister)FE2 race best at Runoffs 2021: 81.3% of SM's (Max Grau)FE2 race best at Runoffs 2022: 94.9% of SM's (Jason Conzo)FE2 race best at Runoffs 2023: 81.6% of SM's (Franklin Futrelle)FE2 race best at Runoffs 2024: 82.2% of SM's (Porter Aiken)FE2 race best at Runoffs 2025: 81.1% of SM's (Franklin Futrelle)FE2 race best at Runoffs 2026: 81.0% of SM's (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 83.1% of SM's (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 82.5% of SM's (Liam Snyder)FE2 qualifying best at Runoffs 2020: 81.9% of SM's (Scott Rettich)FE2 qualifying best at Runoffs 2021: 81.9% of SM's (Max Grau)FE2 qualifying best at Runoffs 2022: 82.3% of SM's (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 82.0% of SM's (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 81.6% of SM's (Porter Aiken)FE2 qualifying best at Runoffs 2025: 81.2% of SM's (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 81.6% of SM's (Franklin Futrelle)FB race best at Runoffs 2015: 77.5% of SM's (J R Osborne)FB race best at Runoffs 2016: 80.4% of SM's (Jeremy Hill)FB race best at Runoffs 2017: 78.7% of SM's (Alex Mayer)FB race best at Runoffs 2018: 79.1% of SM's (J R Osborne)FB race best at Runoffs 2019: 86.2% of SM's (Pete Frost)FB qualifying best at Runoffs 2015: 79.8% of SM's (J R Osborne)FB qualifying best at Runoffs 2016: 79.5% of SM's (Alex Mayer)FB qualifying best at Runoffs 2017: 79.2% of SM's (Gary Hickman)FB qualifying best at Runoffs 2018: 77.5% of SM's (J R Osborne)FB qualifying best at Runoffs 2019: 85.1% of SM's (Pete Frost)FP race best at Runoffs 2015: 91.9% of SM's (Kevin Ruck)FP race best at Runoffs 2016: 95.7% of SM's (John Walker)FP race best at Runoffs 2017: 94.9% of SM's (Eric Prill)FP race best at Runoffs 2018: 94.1% of SM's (Joe Huffaker)FP race best at Runoffs 2019: 93.9% of SM's (Eric Prill)FP race best at Runoffs 2020: 94.1% of SM's (Kevin Ruck)FP race best at Runoffs 2021: 100.9% of SM's (Cliff Ira)FP race best at Runoffs 2022: 98.9% of SM's (Mason Workman)FP race best at Runoffs 2023: 93.8% of SM's (Cliff Ira)FP race best at Runoffs 2024: 94.9% of SM's (Kevin Ruck)FP race best at Runoffs 2025: 93.8% of SM's (Chris Bovis)FP race best at Runoffs 2026: 94.2% of SM's (David Strittmatter)FP qualifying best at Runoffs 2015: 94.5% of SM's (Kevin Ruck)FP qualifying best at Runoffs 2016: 95.4% of SM's (John Walker)FP qualifying best at Runoffs 2017: 94.7% of SM's (Eric Prill)FP qualifying best at Runoffs 2018: 94.1% of SM's (Joe Huffaker)FP qualifying best at Runoffs 2019: 94.7% of SM's (Eric Prill)FP qualifying best at Runoffs 2020: 93.3% of SM's (Ethan Shippert)FP qualifying best at Runoffs 2021: 94.4% of SM's (Craig Chima)FP qualifying best at Runoffs 2022: 93.7% of SM's (Eric Prill)FP qualifying best at Runoffs 2023: 95.0% of SM's (Cliff Ira)FP qualifying best at Runoffs 2024: 94.6% of SM's (Cliff Ira)FP qualifying best at Runoffs 2025: 93.4% of SM's (David Strittmatter)FP qualifying best at Runoffs 2026: 94.5% of SM's (Stephen Simonds)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
SMFE2FBFPsolid race · dashed qualifying · each class's best lap as a share of SM's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventSMFE2FBFP
Qual best Race best Trap Qual best Race best Trap vs SM % of SM Qual best Race best Trap vs SM % of SM Qual best Race best Trap vs SM % of SM 
Road America Runoffs 20262026-09-282:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)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%)-30.844squal -29.847s81.0%qual 81.6%2:33.275Stephen Simonds · fastest of 26 · top 5 within 1.0s+0.880s (+0.58%)2:33.240David Strittmatter · fastest of 25 · top 5 within 1.7s-1.031s (-0.67%)132.4David Strittmatter±0.0 mph (±0.0%)-9.485squal -8.898s94.2%qual 94.5%
37 rule changes (SM: 2, FE2: 1, FP: 34)10 weight · 9 engine · 7 induction · 2 cars added · 1 suspension & brakes · 1 tyres & wheels · 5 wording · 2 othershowhide
  • FP Mini Cooper Compression Ratio #40517engine
  • FP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • FP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • FP HP Honda Civic (92-95) #40464weight -70 lbs
  • SM Rear Toe Link #40271other
  • FP Miata track width - errors and omissions #39976wording
  • FP GCR Spec Line Correction #39977induction
  • FP CGR Spec Line Weight Correction #39978weight
  • FP Triumph GT6 Spec Change. #40098induction
  • FP Request to Classify BMW E21 320i #40110cars added
  • FP BMW 318is 84-85 engine displacement correction #40116engine
  • SM Part Number Change Request #39914wording
  • FP Correct Valve Sizes on FP Fiat x19 1300 and 1500 #39850engine
  • FP Dual Carburetor Adjustments #39851induction
  • FP Request Toyota 5E Series Engines #38208engine
  • FP Request for Toyota 4E Series Engines #38209engine
  • FP Dual Carbs for the Fiat X1/9 #39593induction
  • FP TR2 Notes E&O #39180weight
  • FP Balance of Power #39187weight +50 lbs
  • FP Competition Adjustment Request #39259weight -80 lbs
  • FP Factory Roll Bar Removal on VW Convertible #39268wording
  • FP FP Parity Request #39325weight +50 lbs
  • FP Adjust former-GTL Honda's with B/D-Series Engines #39374engine
  • FP Please Lower Weight of 280Z #38871weight -160 lbs
  • FP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • FP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • FP HP Volvo 142 spec omission #38994engine
  • FP HP Mini DOHC 1.6 #38996engine
  • FP 83-88 FP Scirocco Spec Line Creation #38997cars added
  • FP Add to Rabbit description #39019wording
  • FP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • FP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • FP Correct Existing VW Scirocco Spec Line #39140weight
  • FE2 FE & FE2 Bubble Tail #38978other
  • FP HP Plymouth Arrow spec omission #38995wording
  • FP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • FP Add TB ID tolerance to general Prod rules #39009induction
Road America Runoffs 20252025-09-292:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)119.3Francisco Barroso-0.6 mph (-0.5%)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%)-31.091squal -30.636s81.1%qual 81.2%2:32.395David Strittmatter · fastest of 20 · top 5 within 2.9s+0.068s (+0.04%)2:34.271Chris Bovis · fastest of 19 · top 5 within 1.8s+1.025s (+0.67%)132.4David Strittmatter-1.1 mph (-0.8%)-10.159squal -10.716s93.8%qual 93.4%
22 rule changes (SM: 4, FE2: 1, FP: 17)7 weight · 4 induction · 2 cars added · 1 engine · 1 tyres & wheels · 1 wording · 6 othershowhide
  • FP BMW Z4 update #38490induction
  • FP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • FP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • FE2 Driver Safety & Comfort #37965other
  • FP Request for Classification of Chevrolet Spark #37755cars added
  • FP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • FP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • FP FP Class Adjustments #37458weight
  • FP Interpretation of Production Rules on Mirrors #37235other
  • FP Weight Reduction for Honda S2000 #37466weight
  • FP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • FP Errors & Omissions #37648cars added
  • FP GTL/FP consolidation 2025 Rules #37659induction
  • FP Effective date for Jan 2025 GCR updates #37654induction
  • FP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • FP Fix Error in Spridget Spec Line #37437engine
  • FP Create ruleset that allows GTL cars to run in FP #37485other
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • FP 1275 HP Spridget Level 2 Only #36518other
Road America Runoffs 20242024-10-012:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)119.9Alex Bertagnoli-1.4 mph (-1.2%)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%)-28.738squal -29.600s82.2%qual 81.6%2:32.327Cliff Ira · fastest of 26 · top 5 within 2.1s+0.913s (+0.60%)2:33.246Kevin Ruck · fastest of 24 · top 5 within 1.4s-0.787s (-0.51%)133.5David Strittmatter+0.3 mph (+0.2%)-8.240squal -8.779s94.9%qual 94.6%
25 rule changes (SM: 4, FP: 21)9 weight · 3 engine · 3 induction · 2 cars added · 1 suspension & brakes · 4 wording · 3 othershowhide
  • FP Errors/emissions Honda Civic/CRX #36700wording
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • FP Errant entry in HP production line item #36231other
  • FP NIssan 300ZX Z31 to EP #35830cars added
  • FP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • FP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • FP Request to Replace CRX Plastic Panels #35876wording
  • FP FP data and parity #35896induction
  • FP GCR Correction - Redundant HP Spec Lines #35623engine
  • FP Update FP Protege (01-03) Model Info #35715other
  • FP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • FP FP data #35060weight +25 lbs
  • FP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • FP Corrections to Honda Spec Lines in FP #35250induction
  • FP Miata Alternate Head #35253weight -50 lbs
  • FP Triumph GT6 Adjustments #35255weight
  • FP Honda S2000 throttle body #35272induction
  • FP Correction within Triumph TR8 Spec Line #35315engine
  • FP Correction to EP 924S/944 Spec Line #35317weight
  • FP Porsche 944/924S Rule Change Request #35002weight
  • FP FP and HP Toyota Corolla #35030weight -43 lbs
  • FP Triumph GT6 Adjustments #35054weight -30 lbs
Virginia International Raceway Runoffs 20232023-09-232:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)120.3Jim Drago+1.1 mph (+0.9%)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%)-25.131squal -24.321s81.6%qual 82.0%2:08.248Cliff Ira · fastest of 21 · top 5 within 1.0s+2.031s (+1.61%)2:07.787Cliff Ira · fastest of 20 · top 5 within 0.8s-9.854s (-7.16%)133.7Cliff Ira+1.1 mph (+0.9%)-8.442squal -6.738s93.8%qual 95.0%
7 rule changes (SM: 1, FP: 6)2 cars added · 2 induction · 1 weight · 2 othershowhide
  • FP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • FP ITC to FP? #34286other
  • FP Request to Classify Sonic and Fiesta in HP #34264cars added
  • FP Classification Request for 1978 Toyota Celica #34097cars added
  • FP Request to Add Mazda Protege P5 to FP #33664other
  • FP Review Limited Prep Port Matching Rules #33600induction
  • SM BOP for NB1 and NB2 #32309weight
Virginia International Raceway Runoffs 20222022-09-242:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)119.2Jonathan Neudorf-0.6 mph (-0.5%)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%)-7.062squal -23.811s94.9%qual 82.3%2:06.217Eric Prill · fastest of 18 · top 5 within 1.5s-1.219s (-0.96%)2:17.641Mason Workman · fastest of 15 · top 5 within 3.2s+9.565s (+7.47%)132.5Cliff Ira+1.2 mph (+0.9%)-1.466squal -8.447s98.9%qual 93.7%
26 rule changes (SM: 1, FP: 25)9 induction · 4 cars added · 4 engine · 3 weight · 2 tyres & wheels · 1 suspension & brakes · 1 wording · 2 othershowhide
  • FP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • FP Request Rotary Injection on Dual Y manifold #32775engine
  • FP Request for Corrado Stroke & Displacement Correction #32985engine
  • FP Subaru BRZ Model Years #32500other
  • FP Weight Adjustment of Lotus 7 #32213weight +50 lbs
  • FP EP MX-5 Global Cup Car #32218weight
  • FP Please Class BMW 128i in EP #32370cars added
  • FP Inconsistency in Body Work Descriptions #32396other
  • FP Request to classify the 1999-2000 Mazda Protege in FP #32398cars added
  • FP Mazda RX8 with 13b Rotary #32170induction
  • FP Request Idle control valve clarification #32178engine
  • FP Correct FP BMW 325e/es Displacement #32394engine
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • FP EP Adjustments #31858induction
  • FP 1999 3.8L Ford Mustang to EP? #31635weight
  • FP Improved Touring Tires #32064tyres & wheels
  • FP VW Golf Jetta 2.0L intake and exhaust size correction. #32173induction
  • FP Throttle Body and Idle Air #31800induction
  • FP Porsche 968 Engine Questions #31478induction
  • FP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • FP BMW Z3 2.5L Spec Line #31724induction
  • FP FP Del Sol VTEC #31859induction
  • FP Standardize Level 2 Classifications in FP #31868induction
  • FP 944S2 Restrictor #31396induction
  • FP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • FP E&O; MR2 Track #31120wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)119.8Kyle Greenhill1:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler-22.182squal -21.300s81.3%qual 81.9%1:51.082Craig Chima · fastest of 39 · top 5 within 1.2s-1.009s (-0.90%)1:59.933Cliff Ira · fastest of 33 · top 5 within 5.4s+6.926s (+6.13%)131.8Cliff Ira+1.096squal -6.613s100.9%qual 94.4%
22 rule changes (SM: 1, FP: 21)7 cars added · 7 weight · 3 engine · 2 suspension & brakes · 1 induction · 2 othershowhide
  • FP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • FP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • FP Lotus/Caterham 7 America Request #30392engine
  • FP Request to classify ITC Plymouth Arrow #30588cars added
  • FP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added
  • FP Fiat x1/9 Competition Adjustments #30711weight -50 lbs
  • FP Reclassify Daimler SP 250 #30721cars added
  • FP Move Porsche 924 in Level 1 Prep From EP to FP #30135cars added
  • FP Clarify Application of Percentage Based Weight Penalties #30669weight
  • FP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • FP Fiat X1/9 brake rotors #30423suspension & brakes
  • FP Please Classify Mazda3 in FP #30165cars added
  • FP Golf MkIII Valve Size Request #30268engine
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • FP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • FP Request VW weight break #29963weight -50 lbs
  • FP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • FP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • FP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • FP EP TR8 Adjustment #29512weight -100 lbs
  • FP Request to Classify 1996-2000 Honda Civic EX #29515cars added
  • FP FAJS Carburetor #29576other
Road America Runoffs 20202020-10-022:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister-30.477squal -29.403s81.4%qual 81.9%2:31.414Ethan Shippert · fastest of 23 · top 5 within 2.2s2:34.033Kevin Ruck · fastest of 21 · top 5 within 2.3s133.2Sam Henry-9.715squal -10.795s94.1%qual 93.3%
23 rule changes (SM: 2, FE2: 2, FP: 19)5 cars added · 5 engine · 4 induction · 4 weight · 1 suspension & brakes · 1 tyres & wheels · 3 wordingshowhide
  • FP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • SM Radiator E&O Clarifications #29294engine
  • FE2 FE/FE2 Oil Cooler #29293wording
  • FP EP BMW Z3 Rule Clarification #28998engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • FP Request to Classify Porsche 911 2.0L #28456cars added
  • FP Request to change to Carburetor Spec Line 84-87 Mazda 626 #28926induction
  • FP BMW Cylinder Head Casting and Part Numbers #28708engine
  • FP Correct Scirocco Spec line E&O #28892weight
  • FP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • FP Error in Mini Cooper Spec Line #28713wording
  • FP Caterham 7 Spec Line #28498engine
  • FP Request to classify SOHC 1989-90 240SX in F prod L2 #28553cars added
  • FP VW Weight and Valve Size Request #27886weight
  • FP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • FP Request to classify Porsche 914 2L in LPrep FProd #28231cars added
  • FP Request Ford Fiesta Weight Adjustment #28336weight
  • FP Request for Help for Datsun 1200 #27934induction
  • FP Request to List Mazda Miata Throttle Body Size #27907induction
  • FP Request to Classify 2001-2003 Mazda Protege ES in FP #27922cars added
  • FE2 FE / FE2 Update Rules #27624weight
  • FP Request to Correct Track of 1988-91 Honda Civic #27487wording
  • FP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
Virginia International Raceway Runoffs 20192019-10-052:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman-24.305squal -23.490s82.2%qual 82.5%1:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost-18.771squal -20.083s86.2%qual 85.1%2:07.436Eric Prill · fastest of 19 · top 5 within 0.6s2:08.076Eric Prill · fastest of 18 · top 5 within 0.8s131.4Ken Kannard-8.383squal -7.116s93.9%qual 94.7%
13 rule changes (SM: 4, FP: 9)2 induction · 2 tyres & wheels · 2 weight · 1 cars added · 1 engine · 1 suspension & brakes · 2 wording · 2 othershowhide
  • FP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • FP Request to classify the GMX5 2019 #27263cars added
  • FP level one susp. component rule #27270suspension & brakes
  • FP Clarification of Carb Rules - Prep 1 #27300induction
  • FP Clarification of Carb Rules - Prep 2 #27301induction
  • FP Request Miata Eligibility - 2003 #27121other
  • FP Rollcenter Correction Clarification #25873tyres & wheels
  • FP Hardtops #26476wording
  • FP Request Classification of Dodge Daytona in F Production #26259weight -150 lbs
  • SM Request to allow aftermarket fuel filters. #26370wording
  • SM Request 99-00 replacement Wire harnesses #25602engine
  • SM Organize and Clarify 9.1.7.C.1.o. #25913weight
  • SM Strike Tire Tread Language #26123tyres & wheels
Sonoma Raceway Runoffs 20182018-10-101:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich-19.715squal -19.315s82.9%qual 83.1%1:28.612J 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-24.089squal -25.743s79.1%qual 77.5%1:47.588Joe Huffaker · fastest of 15 · top 5 within 3.0s1:48.481Joe Huffaker · fastest of 14 · top 5 within 2.2s109.1Joe Huffaker-6.797squal -6.767s94.1%qual 94.1%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s-25.398squal -24.560s78.7%qual 79.2%1:52.091Eric Prill · fastest of 42 · top 5 within 1.2s1:53.007Eric Prill · fastest of 40 · top 5 within 0.7s-6.093squal -6.215s94.9%qual 94.7%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s-19.749squal -20.628s80.4%qual 79.5%1:35.938John Walker · fastest of 33 · top 5 within 0.4s1:36.399John Walker · fastest of 27 · top 5 within 0.3s-4.365squal -4.576s95.7%qual 95.4%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s-32.451squal -27.950s77.5%qual 79.8%2:11.009Kevin Ruck · fastest of 20 · top 5 within 1.6s2:12.419Kevin Ruck · fastest of 18 · top 5 within 1.1s-11.648squal -7.652s91.9%qual 94.5%

By track

TrackEvents Typical % of SM 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 SM'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.