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BoP Lab / Classes / HP

HP vs FE2 vs SM vs SMX pace at every track

Lap times across years say as much about the weather as the class. % of HP is each class's best lap as a share of HP'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-SpecEPFAFCvsFE2×FFFPFVFXGT1GT2GTXHP×PP2vsSM×vsSMX×SRF3STLSTUT1T2T3T4Show 51 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: HP 100.0% of HP Alan (Aj) Hulse, Daytona International Speedway Runoffs 2015 race · FE2 79.6% of HP Owen McAllister, Road America Runoffs 2020 race · SM 97.8% of HP Preston Pardus, Road America Runoffs 2020 race · SMX 98.1% of HP Nathan Nicholson, Virginia International Raceway Runoffs 2023 qualifying

1:402:002:202:4014 rule changes between Runoffs 2018 and Runoffs 201914 ▾25 rule changes between Runoffs 2019 and Runoffs 202025 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾8 rule changes between Runoffs 2022 and Runoffs 20238 ▾30 rule changes between Runoffs 2023 and Runoffs 202430 ▾27 rule changes between Runoffs 2024 and Runoffs 202527 ▾34 rule changes between Runoffs 2025 and Runoffs 202634 ▾HP race best at Runoffs 2015: 2:17.981 (Alan (Aj) Hulse)HP race best at Runoffs 2016: 1:40.442 (Jason Isley)HP race best at Runoffs 2017: 1:57.569 (Vesa Silegren)HP race best at Runoffs 2018: 1:54.434 (Jason Isley)HP race best at Runoffs 2019: 2:15.062 (Ron Bartell)HP race best at Runoffs 2020: 2:47.444 (Steve Sargis)HP race best at Runoffs 2021: 1:56.188 (Steve Sargis)HP race best at Runoffs 2022: 2:11.803 (Vesa Silegren)HP race best at Runoffs 2023: 2:14.681 (Chris Schaafsma)HP race best at Runoffs 2024: 2:37.731 (Chuck Mathis)HP race best at Runoffs 2025: 2:38.270 (Steve Sargis)HP race best at Runoffs 2026: 2:38.036 (Steve Sargis)HP qualifying best at Runoffs 2015: 2:17.369 (Jason Isley)HP qualifying best at Runoffs 2016: 1:39.954 (Jason Isley)HP qualifying best at Runoffs 2017: 1:57.421 (Jason Isley)HP qualifying best at Runoffs 2018: 1:54.070 (Brian Linn)HP qualifying best at Runoffs 2019: 2:14.822 (Steve Sargis)HP qualifying best at Runoffs 2020: 2:39.695 (Daniel Meller)HP qualifying best at Runoffs 2021: 1:54.417 (Steve Sargis)HP qualifying best at Runoffs 2022: 2:13.952 (Steve Sargis)HP qualifying best at Runoffs 2023: 2:14.029 (Chris Schaafsma)HP qualifying best at Runoffs 2024: 2:38.445 (Chuck Mathis)HP qualifying best at Runoffs 2025: 2:38.785 (Steve Sargis)HP qualifying best at Runoffs 2026: 2:39.406 (Chris Schaafsma)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)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)SMX race best at Runoffs 2023: 2:12.616 (Noah Harmon)SMX race best at Runoffs 2024: 2:36.278 (Ethan Jacobs)SMX race best at Runoffs 2025: 2:37.091 (Michael Tinis)SMX race best at Runoffs 2026: 2:36.414 (Cam Ebben)SMX qualifying best at Runoffs 2023: 2:11.435 (Nathan Nicholson)SMX qualifying best at Runoffs 2024: 2:35.651 (Ethan Lampe)SMX qualifying best at Runoffs 2025: 2:36.232 (Cam Ebben)SMX qualifying best at Runoffs 2026: 2:36.472 (Skyler Cottrell)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
HPFE2SMSMXsolid race · dashed qualifying · slower is lower
80%85%90%95%100%105%14 rule changes between Runoffs 2018 and Runoffs 201914 ▾25 rule changes between Runoffs 2019 and Runoffs 202025 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾26 rule changes between Runoffs 2021 and Runoffs 202226 ▾8 rule changes between Runoffs 2022 and Runoffs 20238 ▾30 rule changes between Runoffs 2023 and Runoffs 202430 ▾27 rule changes between Runoffs 2024 and Runoffs 202527 ▾34 rule changes between Runoffs 2025 and Runoffs 202634 ▾HP race best at Runoffs 2015: 100.0% of HP's (Alan (Aj) Hulse)HP race best at Runoffs 2016: 100.0% of HP's (Jason Isley)HP race best at Runoffs 2017: 100.0% of HP's (Vesa Silegren)HP race best at Runoffs 2018: 100.0% of HP's (Jason Isley)HP race best at Runoffs 2019: 100.0% of HP's (Ron Bartell)HP race best at Runoffs 2020: 100.0% of HP's (Steve Sargis)HP race best at Runoffs 2021: 100.0% of HP's (Steve Sargis)HP race best at Runoffs 2022: 100.0% of HP's (Vesa Silegren)HP race best at Runoffs 2023: 100.0% of HP's (Chris Schaafsma)HP race best at Runoffs 2024: 100.0% of HP's (Chuck Mathis)HP race best at Runoffs 2025: 100.0% of HP's (Steve Sargis)HP race best at Runoffs 2026: 100.0% of HP's (Steve Sargis)HP qualifying best at Runoffs 2015: 100.0% of HP's (Jason Isley)HP qualifying best at Runoffs 2016: 100.0% of HP's (Jason Isley)HP qualifying best at Runoffs 2017: 100.0% of HP's (Jason Isley)HP qualifying best at Runoffs 2018: 100.0% of HP's (Brian Linn)HP qualifying best at Runoffs 2019: 100.0% of HP's (Steve Sargis)HP qualifying best at Runoffs 2020: 100.0% of HP's (Daniel Meller)HP qualifying best at Runoffs 2021: 100.0% of HP's (Steve Sargis)HP qualifying best at Runoffs 2022: 100.0% of HP's (Steve Sargis)HP qualifying best at Runoffs 2023: 100.0% of HP's (Chris Schaafsma)HP qualifying best at Runoffs 2024: 100.0% of HP's (Chuck Mathis)HP qualifying best at Runoffs 2025: 100.0% of HP's (Steve Sargis)HP qualifying best at Runoffs 2026: 100.0% of HP's (Chris Schaafsma)FE2 race best at Runoffs 2018: 83.5% of HP's (Flinn Lazier)FE2 race best at Runoffs 2019: 83.0% of HP's (Liam Snyder)Off the chart: FE2 race best at Runoffs 2020: 79.6% of HP's (Owen McAllister)FE2 race best at Runoffs 2021: 83.2% of HP's (Max Grau)FE2 race best at Runoffs 2022: 100.2% of HP's (Jason Conzo)FE2 race best at Runoffs 2023: 82.5% of HP's (Franklin Futrelle)FE2 race best at Runoffs 2024: 84.2% of HP's (Porter Aiken)FE2 race best at Runoffs 2025: 84.2% of HP's (Franklin Futrelle)FE2 race best at Runoffs 2026: 83.4% of HP's (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 83.3% of HP's (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 82.4% of HP's (Liam Snyder)FE2 qualifying best at Runoffs 2020: 83.2% of HP's (Scott Rettich)FE2 qualifying best at Runoffs 2021: 84.2% of HP's (Max Grau)FE2 qualifying best at Runoffs 2022: 82.8% of HP's (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 82.6% of HP's (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 83.0% of HP's (Porter Aiken)FE2 qualifying best at Runoffs 2025: 83.4% of HP's (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 83.0% of HP's (Franklin Futrelle)SM race best at Runoffs 2015: 104.4% of HP's (Todd Lamb)SM race best at Runoffs 2016: 100.3% of HP's (Michael Carter)SM race best at Runoffs 2017: 101.3% of HP's (Michael Gagliardo)SM race best at Runoffs 2018: 100.7% of HP's (Michael Carter)SM race best at Runoffs 2019: 101.0% of HP's (Elivan Goulart)SM race best at Runoffs 2020: 97.8% of HP's (Preston Pardus)SM race best at Runoffs 2021: 102.3% of HP's (Brian Henderson)SM race best at Runoffs 2022: 105.5% of HP's (Travis Wiley)SM race best at Runoffs 2023: 101.1% of HP's (Julian DaCosta)SM race best at Runoffs 2024: 102.4% of HP's (Brett Kowalski)SM race best at Runoffs 2025: 103.9% of HP's (Kyle Greenhill)SM race best at Runoffs 2026: 103.0% of HP's (Francisco Barroso)SM qualifying best at Runoffs 2015: 100.9% of HP's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 100.6% of HP's (Justin Hille)SM qualifying best at Runoffs 2017: 100.8% of HP's (Chris Haldeman)SM qualifying best at Runoffs 2018: 100.2% of HP's (Ken Sutherland)SM qualifying best at Runoffs 2019: 99.8% of HP's (Todd Buras)SM qualifying best at Runoffs 2020: 101.6% of HP's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 102.9% of HP's (Brian Henderson)SM qualifying best at Runoffs 2022: 100.5% of HP's (Danny Steyn)SM qualifying best at Runoffs 2023: 100.7% of HP's (Danny Steyn)SM qualifying best at Runoffs 2024: 101.7% of HP's (Ethan Goulart)SM qualifying best at Runoffs 2025: 102.7% of HP's (Bobby Gossett)SM qualifying best at Runoffs 2026: 101.7% of HP's (Brett Kowalski)SMX race best at Runoffs 2023: 98.5% of HP's (Noah Harmon)SMX race best at Runoffs 2024: 99.1% of HP's (Ethan Jacobs)SMX race best at Runoffs 2025: 99.3% of HP's (Michael Tinis)SMX race best at Runoffs 2026: 99.0% of HP's (Cam Ebben)SMX qualifying best at Runoffs 2023: 98.1% of HP's (Nathan Nicholson)SMX qualifying best at Runoffs 2024: 98.2% of HP's (Ethan Lampe)SMX qualifying best at Runoffs 2025: 98.4% of HP's (Cam Ebben)SMX qualifying best at Runoffs 2026: 98.2% of HP's (Skyler Cottrell)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
HPFE2SMSMXsolid race · dashed qualifying · each class's best lap as a share of HP's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventHPFE2SMSMX
Qual best Race best Trap Qual best Race best Trap vs HP % of HP Qual best Race best Trap vs HP % of HP Qual best Race best Trap vs HP % of HP 
Road America Runoffs 20262026-09-282:39.406Chris Schaafsma · fastest of 15 · top 5 within 7.7s+0.621s (+0.39%)2:38.036Steve Sargis · fastest of 11 · top 5 within 4.6s-0.234s (-0.15%)122.7Jesse Prather-2.2 mph (-1.8%)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%)-26.155squal -27.080s83.4%qual 83.0%2:42.173Brett 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%)+4.689squal +2.767s103.0%qual 101.7%2:36.472Skyler Cottrell · fastest of 21 · top 5 within 0.4s+0.240s (+0.15%)2:36.414Cam Ebben · fastest of 21 · top 5 within 1.1s-0.677s (-0.43%)128.4Christian Hoagland-0.6 mph (-0.5%)-1.622squal -2.934s99.0%qual 98.2%
34 rule changes (HP: 29, FE2: 1, SM: 2, SMX: 2)7 engine · 7 weight · 4 induction · 3 cars added · 3 tyres & wheels · 1 suspension & brakes · 5 wording · 4 othershowhide
  • HP Mini Cooper Compression Ratio #40517engine
  • HP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • HP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • HP HP Honda Civic (92-95) #40464weight -70 lbs
  • SM Rear Toe Link #40271other
  • SMX Rear Toe Link #40271other
  • HP Austin Healy Sprite/ MG Midget 1275 Induction Change Request #40213weight
  • HP Miata track width - errors and omissions #39976wording
  • HP Triumph GT6 Spec Change. #40098induction
  • HP Request to Classify BMW E21 320i #40110cars added
  • HP BMW 318is 84-85 engine displacement correction #40116engine
  • SM Part Number Change Request #39914wording
  • SMX Part Number Change Request #39914wording
  • HP Clarification On Oil Cooler Ducting #39604tyres & wheels
  • HP Honda Fit 2015-19 Error in Engine Classification #39853engine
  • HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1 #39589engine
  • HP E/O: Improve Consistency of the Spec Lines #39500other
  • HP Request to Reclassify BMW 2002 Into H Production #39567cars added
  • HP Request to Re-Classsify Datsun SPL-311 to HP from FP #39116cars added
  • HP TR2 Notes E&O #39180weight
  • HP Balance of Power #39187weight +50 lbs
  • HP Alternative BOP Request for 84-87 Honda CRX/Civic #39223tyres & wheels
  • HP Please Lower Weight of 280Z #38871weight -160 lbs
  • HP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • HP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • HP HP Volvo 142 spec omission #38994engine
  • HP HP Mini DOHC 1.6 #38996engine
  • HP Add to Rabbit description #39019wording
  • HP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • HP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • FE2 FE & FE2 Bubble Tail #38978other
  • HP HP Plymouth Arrow spec omission #38995wording
  • HP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • HP Add TB ID tolerance to general Prod rules #39009induction
Road America Runoffs 20252025-09-292:38.785Steve Sargis · fastest of 17 · top 5 within 1.9s+0.340s (+0.21%)2:38.270Steve Sargis · fastest of 14 · top 5 within 2.4s+0.539s (+0.34%)124.9Chris Schaafsma+2.1 mph (+1.7%)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%)-24.931squal -26.310s84.2%qual 83.4%2:43.111Bobby 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%)+6.160squal +4.326s103.9%qual 102.7%2:36.232Cam Ebben · fastest of 20 · top 5 within 0.2s+0.581s (+0.37%)2:37.091Michael Tinis · fastest of 19 · top 5 within 0.3s+0.813s (+0.52%)129.1Camden Gruber-0.4 mph (-0.3%)-1.179squal -2.553s99.3%qual 98.4%
27 rule changes (HP: 17, FE2: 1, SM: 4, SMX: 5)8 weight · 3 induction · 2 cars added · 2 tyres & wheels · 1 engine · 1 suspension & brakes · 2 wording · 8 othershowhide
  • HP BMW Z4 update #38490induction
  • HP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • HP 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
  • SMX SMX Data Submission - Penalties #38248other
  • SMX SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • SMX Clarify Tire Marking Regs #38004tyres & wheels
  • SMX SMX Data Submission Timeframe #38039other
  • FE2 Driver Safety & Comfort #37965other
  • HP Request for Classification of Chevrolet Spark #37755cars added
  • HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • HP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • HP HP Class Adjustments #37459weight +50 lbs
  • HP Interpretation of Production Rules on Mirrors #37235other
  • HP Weight Reduction for Honda S2000 #37466weight
  • HP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions #37560engine
  • HP Effective date for Jan 2025 GCR updates #37654induction
  • HP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • HP Request to Update 1988-1991 Civic to Match 1988-1991 CRX #37444weight -70 lbs
  • HP MINI Cooper Spec Line Correction - Rear Brake Rotor Diameter #37176suspension & brakes
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • SMX E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • HP 1275 HP Spridget Level 2 Only #36518other
  • HP Request for Classification of 1989-1994 Suzuki Swift GT 16V Twin #36858cars added
Road America Runoffs 20242024-10-012:38.445Chuck Mathis · fastest of 20 · top 5 within 3.4s-1.250s (-0.78%)2:37.731Chuck Mathis · fastest of 19 · top 5 within 2.3s-9.713s (-5.80%)122.8William Trainer-0.3 mph (-0.2%)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%)-24.983squal -26.939s84.2%qual 83.0%2:41.106Ethan 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%)+3.755squal +2.661s102.4%qual 101.7%2:35.651Ethan Lampe · fastest of 23 · top 5 within 0.7s2:36.278Ethan Jacobs · fastest of 22 · top 5 within 0.7s129.5Michael Borden-1.453squal -2.794s99.1%qual 98.2%
30 rule changes (HP: 22, SM: 4, SMX: 4)11 weight · 6 engine · 2 cars added · 2 suspension & brakes · 1 induction · 3 wording · 5 othershowhide
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • SMX SMX Camera Rule Correction #36496wording
  • SMX AIM ECU Protocol #36556engine
  • SMX OE versus OEM Definitons #36608other
  • SMX Shifter Bushing #36611suspension & brakes
  • HP Errant entry in HP production line item #36231other
  • HP NIssan 300ZX Z31 to EP #35830cars added
  • HP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • HP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • HP Replace plastic panels #35875other
  • HP GCR Correction - Redundant HP Spec Lines #35623engine
  • HP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • HP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • HP Parity in HP #35138other
  • HP Spitfire classification #35224engine
  • HP Miata Alternate Head #35253weight -50 lbs
  • HP Triumph GT6 Adjustments #35255weight
  • HP Honda S2000 throttle body #35272induction
  • HP Front Header/Nose Panel Alternate Material For 84-87 CRX #35301engine
  • HP Correction within Triumph TR8 Spec Line #35315engine
  • HP Correction to EP 924S/944 Spec Line #35317weight
  • HP Review Classification of HP Mazda 2 #35318weight +75 lbs
  • HP Request to Adjust Weight of 1988-1991 CRX/Civic #35115weight -70 lbs
  • HP Porsche 944/924S Rule Change Request #35002weight
  • HP FP and HP Toyota Corolla #35030weight -43 lbs
  • HP Weight Reduction for Mazda 626 #35031weight -100 lbs
  • HP Triumph GT6 Adjustments #35054weight -30 lbs
Virginia International Raceway Runoffs 20232023-09-232:14.029Chris Schaafsma · fastest of 25 · top 5 within 2.7s+0.077s (+0.06%)2:14.681Chris Schaafsma · fastest of 24 · top 5 within 2.5s+2.878s (+2.18%)119.4William Trainer-0.8 mph (-0.7%)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%)-23.583squal -23.364s82.5%qual 82.6%2:14.986Danny 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%)+1.548squal +0.957s101.1%qual 100.7%2:11.435Nathan Nicholson · fastest of 18 · top 5 within 0.6s2:12.616Noah Harmon · fastest of 16 · top 5 within 0.1s127.8Noah Harmon-2.065squal -2.594s98.5%qual 98.1%
8 rule changes (HP: 7, SM: 1)3 induction · 3 weight · 1 cars added · 1 othershowhide
  • HP Larger chokes #34681induction
  • HP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • HP ITC to FP? #34286other
  • HP Request to Classify Sonic and Fiesta in HP #34264cars added
  • HP MGB HP Weight Break and/or Hybrid 1/2 Prep in HP #33127weight
  • HP Datsun 510 Help #33568weight -50 lbs
  • HP Review Limited Prep Port Matching Rules #33600induction
  • SM BOP for NB1 and NB2 #32309weight
Virginia International Raceway Runoffs 20222022-09-242:13.952Steve Sargis · fastest of 23 · top 5 within 3.9s-0.870s (-0.65%)2:11.803Vesa Silegren · fastest of 21 · top 5 within 6.3s-3.259s (-2.41%)120.2Chris Schaafsma-4.7 mph (-3.8%)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%)+0.242squal -23.099s100.2%qual 82.8%2:14.664Danny 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%)+7.304squal +0.712s105.5%qual 100.5%
26 rule changes (HP: 25, SM: 1)6 induction · 5 cars added · 5 weight · 4 engine · 2 tyres & wheels · 1 suspension & brakes · 1 wording · 2 othershowhide
  • HP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • HP Request Rotary Injection on Dual Y manifold #32775engine
  • HP Request for Corrado Stroke & Displacement Correction #32985engine
  • HP Subaru BRZ Model Years #32500other
  • HP EP MX-5 Global Cup Car #32218weight
  • HP Please Class BMW 128i in EP #32370cars added
  • HP Inconsistency in Body Work Descriptions #32396other
  • HP Mazda RX8 with 13b Rotary #32170induction
  • HP Request Idle control valve clarification #32178engine
  • HP Classify VW New Beetle in HP. #32241cars added
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • HP Weight Change for Competition Adjustment #31182weight +45 lbs
  • HP EP Adjustments #31858induction
  • HP 1999 3.8L Ford Mustang to EP? #31635weight
  • HP Improved Touring Tires #32064tyres & wheels
  • HP Throttle Body and Idle Air #31800induction
  • HP Incorrect Valve Size Changes in Jan 2022 GCR for FIAT X1/9 #31990engine
  • HP Porsche 968 Engine Questions #31478induction
  • HP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • HP Weight Adjustment To Fiat X1/9 Spec Lines, H-Production #31653weight -50 lbs
  • HP 1500 Midget #31665cars added
  • HP BMW Z3 2.5L Spec Line #31724induction
  • HP Request weight requirement for 1500 MG Midget #31802weight
  • HP 944S2 Restrictor #31396induction
  • HP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • HP E&O; MR2 Track #31120wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:54.417Steve Sargis · fastest of 42 · top 5 within 3.7s-3.004s (-2.56%)1:56.188Steve Sargis · fastest of 42 · top 5 within 2.9s-1.381s (-1.17%)122.0William Trainer1:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler-19.533squal -18.022s83.2%qual 84.2%1:57.695Brian 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 Greenhill+2.649squal +3.278s102.3%qual 102.9%
22 rule changes (HP: 21, SM: 1)8 cars added · 5 weight · 3 suspension & brakes · 2 engine · 2 induction · 1 wording · 1 othershowhide
  • HP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • HP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • HP Lotus/Caterham 7 America Request #30392engine
  • HP Request to classify ITC Plymouth Arrow #30588cars added
  • HP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added
  • HP Reclassify Daimler SP 250 #30721cars added
  • HP 924 Brakes- and Thank You. #30614suspension & brakes
  • HP Clarify Application of Percentage Based Weight Penalties #30669weight
  • HP Correct Induction Error on new HP Mazda 626 Spec Line #30702induction
  • HP Volvo 142 spec line complete. #29479cars added
  • HP Request to Classify 93-98 Volkswagen Golf to HP #29790cars added
  • HP Appeal of Request to Move Porsche 924 to HP #30132cars added
  • HP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • HP Fiat X1/9 brake rotors #30423suspension & brakes
  • HP Request to Classify 2012-2015 MINI Cooper Coupe in HP #30167cars added
  • HP Request clarification on VW 1.8 Rabbit GTI Spec Line #30368wording
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • HP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • HP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • HP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • HP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • HP EP TR8 Adjustment #29512weight -100 lbs
Road America Runoffs 20202020-10-022:39.695Daniel Meller · fastest of 19 · top 5 within 3.3s2:47.444Steve Sargis · fastest of 15 · top 5 within 6.1s123.1William Trainer2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister-34.173squal -26.889s79.6%qual 83.2%2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill-3.696squal +2.514s97.8%qual 101.6%
25 rule changes (HP: 21, FE2: 2, SM: 2)6 engine · 4 induction · 3 cars added · 3 weight · 2 suspension & brakes · 1 tyres & wheels · 3 wording · 3 othershowhide
  • HP 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
  • HP EP BMW Z3 Rule Clarification #28998engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • HP Request to Classify Porsche 911 2.0L #28456cars added
  • HP Request Dual Carbs for 1.8 VW GTI Mk1 #28922engine
  • HP BMW Cylinder Head Casting and Part Numbers #28708engine
  • HP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • HP Error in Mini Cooper Spec Line #28713wording
  • HP Caterham 7 Spec Line #28498engine
  • HP Letter #27917 #28085induction
  • HP Request to Classify 2007 - 2013 Mini Cooper Convertible #28111cars added
  • HP Allow HP Datsun 510 Under Level 2 to Utilize Datsun Z Brakes #28121suspension & brakes
  • HP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • HP Request Ford Fiesta Weight Adjustment #28337weight
  • HP Request for Help for Datsun 1200 #27934induction
  • HP Update years for the Mazda2, Honda Fit, & Mini #27782other
  • HP Allow Dry Sump, Limited Prep Porsche 914 #27814other
  • HP Please Allow Alternate Rear Axle Housing for RWD Toyota Corolla #27854other
  • HP Request to List Mazda Miata Throttle Body Size #27907induction
  • HP HP VW Rabbit Convertible 1.6L #1922 and 32mm chokes #27917weight
  • FE2 FE / FE2 Update Rules #27624weight
  • HP Request to Correct Track of 1988-91 Honda Civic #27487wording
  • HP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
Virginia International Raceway Runoffs 20192019-10-052:14.822Steve Sargis · fastest of 29 · top 5 within 1.1s2:15.062Ron Bartell · fastest of 28 · top 5 within 1.2s124.9William Trainer1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman-22.908squal -23.760s83.0%qual 82.4%2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago+1.397squal -0.270s101.0%qual 99.8%
14 rule changes (HP: 10, SM: 4)3 tyres & wheels · 2 induction · 2 weight · 1 cars added · 1 engine · 1 suspension & brakes · 2 wording · 2 othershowhide
  • HP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • HP Request to classify the GMX5 2019 #27263cars added
  • HP level one susp. component rule #27270suspension & brakes
  • HP Clarification of Carb Rules - Prep 1 #27300induction
  • HP Clarification of Carb Rules - Prep 2 #27301induction
  • HP Request Miata Eligibility - 2003 #27121other
  • HP Rollcenter Correction Clarification #25873tyres & wheels
  • HP Hardtops #26476wording
  • HP Do Something About the Toyota Yaris In H Production #25834weight +130 lbs
  • HP Request to Allow 2011+ Fiesta to Change Bolt Pattern on Wheels #25929tyres & wheels
  • 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 20182018-10-101:54.070Brian Linn · fastest of 16 · top 5 within 2.8s1:54.434Jason Isley · fastest of 16 · top 5 within 3.3s109.3Michael H Miller1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich-18.871squal -19.030s83.5%qual 83.3%1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn+0.844squal +0.285s100.7%qual 100.2%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:57.421Jason Isley · fastest of 46 · top 5 within 0.9s1:57.569Vesa Silegren · fastest of 40 · top 5 within 1.1s1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+1.531squal +0.885s101.3%qual 100.8%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:39.954Jason Isley · fastest of 34 · top 5 within 1.5s1:40.442Jason Isley · fastest of 34 · top 5 within 0.4s1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+0.322squal +0.560s100.3%qual 100.6%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:17.369Jason Isley · fastest of 18 · top 5 within 2.5s2:17.981Alan (Aj) Hulse · fastest of 17 · top 5 within 1.1s2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+6.086squal +1.292s104.4%qual 100.9%

By track

TrackEvents Typical % of HP 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 HP'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.