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BoP Lab / Classes / EP

EP vs P2 vs SM vs SMX 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×FAFCFE2FFFPFVFXGT1GT2GTXHPPvsP2×vsSM×vsSMX×SRF3STLSTUT1T2T3T4Show 51 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 · P2 83.8% of EP Jeff Shafer, Indianapolis Motor Speedway Runoffs 2017 race · SM 92.2% of EP Travis Wiley, Virginia International Raceway Runoffs 2022 race · SMX 104.8% of EP Skyler Cottrell, Road America Runoffs 2026 qualifying

1:201:402:002:202:4023 rule changes between Runoffs 2018 and Runoffs 201923 ▾22 rule changes between Runoffs 2019 and Runoffs 202022 ▾23 rule changes between Runoffs 2020 and Runoffs 202123 ▾32 rule changes between Runoffs 2021 and Runoffs 202232 ▾22 rule changes between Runoffs 2022 and Runoffs 202322 ▾27 rule changes between Runoffs 2023 and Runoffs 202427 ▾24 rule changes between Runoffs 2024 and Runoffs 202524 ▾25 rule changes between Runoffs 2025 and Runoffs 202625 ▾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)P2 race best at Runoffs 2015: 1:52.355 (Jeff Shafer)P2 race best at Runoffs 2016: 1:20.904 (Jeff Shafer)P2 race best at Runoffs 2017: 1:32.481 (Jeff Shafer)P2 race best at Runoffs 2018: 1:32.071 (Chuck Bona)P2 race best at Runoffs 2019: 1:50.258 (Greg Gyann)P2 race best at Runoffs 2020: 2:09.793 (Robert Iversen)P2 race best at Runoffs 2021: 1:35.322 (Tim Day Jr)P2 race best at Runoffs 2022: 2:15.834 (Greg Gyann)P2 race best at Runoffs 2023: 1:48.829 (Lucian Pancea)P2 race best at Runoffs 2024: 2:08.322 (Bart Wolf)P2 race best at Runoffs 2026: 2:09.441 (Mike Reupert)P2 qualifying best at Runoffs 2015: 1:51.825 (Chris Farrell)P2 qualifying best at Runoffs 2016: 1:20.188 (Jeff Shafer)P2 qualifying best at Runoffs 2017: 1:31.826 (Jeff Shafer)P2 qualifying best at Runoffs 2018: 1:28.784 (Tim Day Jr)P2 qualifying best at Runoffs 2019: 1:49.111 (Robert Iversen)P2 qualifying best at Runoffs 2020: 2:08.514 (Robert Iversen)P2 qualifying best at Runoffs 2021: 1:33.235 (Tim Day Jr)P2 qualifying best at Runoffs 2022: 1:47.566 (Tim Day Jr)P2 qualifying best at Runoffs 2023: 1:48.590 (Greg Gyann)P2 qualifying best at Runoffs 2024: 2:07.405 (Bart Wolf)P2 qualifying best at Runoffs 2026: 2:10.606 (Greg Gyann)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
EPP2SMSMXsolid race · dashed qualifying · slower is lower
90%100%110%23 rule changes between Runoffs 2018 and Runoffs 201923 ▾22 rule changes between Runoffs 2019 and Runoffs 202022 ▾23 rule changes between Runoffs 2020 and Runoffs 202123 ▾32 rule changes between Runoffs 2021 and Runoffs 202232 ▾22 rule changes between Runoffs 2022 and Runoffs 202322 ▾27 rule changes between Runoffs 2023 and Runoffs 202427 ▾24 rule changes between Runoffs 2024 and Runoffs 202524 ▾25 rule changes between Runoffs 2025 and Runoffs 202625 ▾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)P2 race best at Runoffs 2015: 89.8% of EP's (Jeff Shafer)P2 race best at Runoffs 2016: 85.8% of EP's (Jeff Shafer)P2 race best at Runoffs 2017: 83.8% of EP's (Jeff Shafer)P2 race best at Runoffs 2018: 86.4% of EP's (Chuck Bona)P2 race best at Runoffs 2019: 90.6% of EP's (Greg Gyann)P2 race best at Runoffs 2020: 87.1% of EP's (Robert Iversen)P2 race best at Runoffs 2021: 86.7% of EP's (Tim Day Jr)P2 race best at Runoffs 2022: 90.0% of EP's (Greg Gyann)P2 race best at Runoffs 2023: 87.7% of EP's (Lucian Pancea)P2 race best at Runoffs 2024: 86.8% of EP's (Bart Wolf)P2 race best at Runoffs 2026: 87.5% of EP's (Mike Reupert)P2 qualifying best at Runoffs 2015: 90.3% of EP's (Chris Farrell)P2 qualifying best at Runoffs 2016: 85.4% of EP's (Jeff Shafer)P2 qualifying best at Runoffs 2017: 83.8% of EP's (Jeff Shafer)P2 qualifying best at Runoffs 2018: 83.9% of EP's (Tim Day Jr)P2 qualifying best at Runoffs 2019: 90.2% of EP's (Robert Iversen)P2 qualifying best at Runoffs 2020: 87.2% of EP's (Robert Iversen)P2 qualifying best at Runoffs 2021: 86.2% of EP's (Tim Day Jr)P2 qualifying best at Runoffs 2022: 87.9% of EP's (Tim Day Jr)P2 qualifying best at Runoffs 2023: 88.1% of EP's (Greg Gyann)P2 qualifying best at Runoffs 2024: 86.8% of EP's (Bart Wolf)P2 qualifying best at Runoffs 2026: 87.5% of EP's (Greg Gyann)SM race best at Runoffs 2015: 115.2% of EP's (Todd Lamb)SM race best at Runoffs 2016: 106.9% of EP's (Michael Carter)SM race best at Runoffs 2017: 107.9% of EP's (Michael Gagliardo)SM race best at Runoffs 2018: 108.2% of EP's (Michael Carter)SM race best at Runoffs 2019: 112.2% of EP's (Elivan Goulart)SM race best at Runoffs 2020: 109.9% of EP's (Preston Pardus)SM race best at Runoffs 2021: 108.1% of EP's (Brian Henderson)SM race best at Runoffs 2022: 92.2% of EP's (Travis Wiley)SM race best at Runoffs 2023: 109.8% of EP's (Julian DaCosta)SM race best at Runoffs 2024: 109.2% of EP's (Brett Kowalski)SM race best at Runoffs 2025: 110.5% of EP's (Kyle Greenhill)SM race best at Runoffs 2026: 110.0% of EP's (Francisco Barroso)SM qualifying best at Runoffs 2015: 112.0% of EP's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 107.1% of EP's (Justin Hille)SM qualifying best at Runoffs 2017: 107.9% of EP's (Chris Haldeman)SM qualifying best at Runoffs 2018: 108.1% of EP's (Ken Sutherland)SM qualifying best at Runoffs 2019: 111.2% of EP's (Todd Buras)SM qualifying best at Runoffs 2020: 110.1% of EP's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 108.8% of EP's (Brian Henderson)SM qualifying best at Runoffs 2022: 110.1% of EP's (Danny Steyn)SM qualifying best at Runoffs 2023: 109.6% of EP's (Danny Steyn)SM qualifying best at Runoffs 2024: 109.7% of EP's (Ethan Goulart)SM qualifying best at Runoffs 2025: 110.7% of EP's (Bobby Gossett)SM qualifying best at Runoffs 2026: 108.7% of EP's (Brett Kowalski)SMX race best at Runoffs 2023: 106.9% of EP's (Noah Harmon)SMX race best at Runoffs 2024: 105.7% of EP's (Ethan Jacobs)SMX race best at Runoffs 2025: 105.6% of EP's (Michael Tinis)SMX race best at Runoffs 2026: 105.8% of EP's (Cam Ebben)SMX qualifying best at Runoffs 2023: 106.7% of EP's (Nathan Nicholson)SMX qualifying best at Runoffs 2024: 106.0% of EP's (Ethan Lampe)SMX qualifying best at Runoffs 2025: 106.1% of EP's (Cam Ebben)SMX qualifying best at Runoffs 2026: 104.8% of EP'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
EPP2SMSMXsolid 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
EventEPP2SMSMX
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%)2:10.606Greg Gyann · fastest of 11 · top 5 within 5.3s+3.201s (+2.51%)2:09.441Mike Reupert · fastest of 11 · top 5 within 4.2s+1.119s (+0.87%)155.0Matt Strand+2.4 mph (+1.6%)-18.428squal -18.633s87.5%qual 87.5%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%)+14.856squal +12.934s110.0%qual 108.7%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%)+8.545squal +7.233s105.8%qual 104.8%
25 rule changes (EP: 21, SM: 2, SMX: 2)6 weight · 5 induction · 4 engine · 1 suspension & brakes · 1 tyres & wheels · 5 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
  • SM Rear Toe Link #40271other
  • SMX Rear Toe Link #40271other
  • EP Honda S2000 Hardtop #40138other
  • EP Miata track width - errors and omissions #39976wording
  • EP Triumph GT6 Spec Change. #40098induction
  • SM Part Number Change Request #39914wording
  • SMX Part Number Change Request #39914wording
  • 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
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%)2:43.111Bobby 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%)+15.674squal +15.818s110.5%qual 110.7%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%)+8.335squal +8.939s105.6%qual 106.1%
24 rule changes (EP: 14, P2: 1, SM: 4, SMX: 5)8 weight · 3 induction · 2 tyres & wheels · 1 cars added · 3 wording · 7 othershowhide
  • 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
  • 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
  • EP Request for Classification of Chevrolet Spark #37755cars added
  • EP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • 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
  • P2 2000 cc Pinto Engine Car Weight #37187weight
  • 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
  • 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%)2:07.405Bart Wolf · fastest of 14 · top 5 within 3.0s-1.109s (-0.86%)2:08.322Bart Wolf · fastest of 13 · top 5 within 0.6s-1.471s (-1.13%)152.5Lucian Pancea-0.6 mph (-0.4%)-19.547squal -19.398s86.8%qual 86.8%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%)+13.617squal +14.303s109.2%qual 109.7%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+8.409squal +8.848s105.7%qual 106.0%
27 rule changes (EP: 14, P2: 5, SM: 4, SMX: 4)8 engine · 7 weight · 2 cars added · 2 suspension & brakes · 1 induction · 1 tyres & wheels · 3 wording · 3 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
  • EP Errant entry in HP production line item #36231other
  • 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
  • P2 CN Spec ECU #35835engine
  • P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels
  • 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
  • P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine
  • P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine
  • EP Porsche 944/924S Rule Change Request #35002weight
  • EP Triumph GT6 Adjustments #35054weight -30 lbs
  • P2 Correct Table 1 for Engine Date Range Specifications #35182engine
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%)1:48.590Greg Gyann · fastest of 12 · top 5 within 1.7s+1.024s (+0.95%)1:48.829Lucian Pancea · fastest of 11 · top 5 within 0.9s-27.005s (-19.88%)150.9Lucian Pancea-0.2 mph (-0.2%)-15.221squal -14.625s87.7%qual 88.1%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%)+12.179squal +11.771s109.8%qual 109.6%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+8.566squal +8.220s106.9%qual 106.7%
22 rule changes (EP: 13, P2: 8, SM: 1)6 weight · 5 engine · 3 induction · 2 suspension & brakes · 1 cars added · 1 tyres & wheels · 2 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
  • P2 Clarify minimum side body height requirement #34143tyres & wheels
  • P2 Clarify closed cockpit single seat car allowance #34144wording
  • EP Investigate Parity of Z3 #33343induction
  • P2 Remove redundant effective date language and update engine table #34012engine
  • P2 E&O - Correct dimensional equivalents #34038weight
  • 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
  • P2 Request to Classify Sebeco NP01 #33378cars added
  • P2 Radical spec line clarifications #33485weight
  • P2 E&O original class intent #33519weight
  • P2 Update Engine Table Spec Line B.1 #33608engine
  • SM BOP for NB1 and NB2 #32309weight
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%)1:47.566Tim Day Jr · fastest of 12 · top 5 within 3.0s-1.545s (-1.42%)2:15.834Greg Gyann · fastest of 12 · top 5 within 10.1s+25.576s (+23.20%)151.1Robert Iversen+1.8 mph (+1.2%)-15.021squal -14.760s90.0%qual 87.9%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%)-11.748squal +12.338s92.2%qual 110.1%
32 rule changes (EP: 21, P2: 10, SM: 1)6 engine · 6 induction · 5 tyres & wheels · 4 weight · 3 cars added · 1 aero · 1 suspension & brakes · 2 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
  • EP Subaru BRZ Model Years #32500other
  • EP EP MX-5 Global Cup Car #32218weight
  • EP Please Class BMW 128i in EP #32370cars added
  • EP Inconsistency in Body Work Descriptions #32396other
  • P2 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels
  • P2 Clean up P2 wording #32525wording
  • EP Mazda RX8 with 13b Rotary #32170induction
  • EP Request Idle control valve clarification #32178engine
  • P2 After Market to Aftermarket #32373other
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • EP EP Adjustments #31858induction
  • EP 1999 3.8L Ford Mustang to EP? #31635weight
  • EP Improved Touring Tires #32064tyres & wheels
  • P2 Add spec line for Beasley B2 #32147weight
  • P2 E&O Table 1 spec line wing terminology #32148aero
  • P2 E&O class name #32196other
  • EP Throttle Body and Idle Air #31800induction
  • EP Porsche 968 Engine Questions #31831engine
  • EP Request weight reduction for 1979-1985 Mazda RX-7 #31833weight
  • P2 E&O Engine section #31969engine
  • 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
  • P2 E&O letter #31539 – Control Area definition #31783tyres & wheels
  • EP 944S2 Restrictor #31396induction
  • EP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • P2 BoP adjustment effective 1-1-22 #31538engine
  • P2 E&O clarification of "Control Area" definition #31539tyres & wheels
  • 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 Brakke1:33.235Tim Day Jr · fastest of 16 · top 5 within 3.3s+1.409s (+1.53%)1:35.322Tim Day Jr · fastest of 10 · top 5 within 4.8s+2.841s (+3.07%)150.3Robert Iversen-14.606squal -14.946s86.7%qual 86.2%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+8.909squal +9.514s108.1%qual 108.8%
23 rule changes (EP: 14, P2: 8, SM: 1)5 engine · 5 weight · 3 cars added · 2 induction · 2 suspension & brakes · 1 tyres & wheels · 1 wording · 4 othershowhide
  • P2 P2 CN Engine Rebuild Clarification #31000engine
  • 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
  • P2 F5 P2 Conversion #30856other
  • P2 Clarify minimum body width requirement #30859tyres & wheels
  • EP Lotus/Caterham 7 America Request #30392engine
  • EP Reclassify Daimler SP 250 #30721cars added
  • EP Clarify Application of Percentage Based Weight Penalties #30669weight
  • 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
  • P2 E&O tonneau cover provision in cockpit opening section #30459other
  • P2 Remove effective dates in Table 1 #30468other
  • P2 E&O Maximum Valves Per Cylinder #30560engine
  • EP Please Classify Mazda3 in FP #30165cars added
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine
  • 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
  • P2 Balance of Performance adjustments effective 01-01-2021 #29822induction
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 Prather2:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s153.1Robert Iversen-19.254squal -18.808s87.1%qual 87.2%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+14.701squal +14.887s109.9%qual 110.1%
22 rule changes (EP: 14, P2: 6, SM: 2)7 engine · 7 induction · 3 cars added · 2 suspension & brakes · 1 aero · 1 tyres & wheels · 1 wordingshowhide
  • EP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • SM Radiator E&O Clarifications #29294engine
  • P2 E&O clarification of P2 rear wing requirements #29205aero
  • EP EP BMW Z3 Rule Clarification #28998engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • EP Request to Classify Porsche 911 2.0L #28456cars added
  • EP BMW Cylinder Head Casting and Part Numbers #28708engine
  • P2 Classify Elan NP01 in P2 Table 1 #28812cars added
  • EP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • EP Error in Mini Cooper Spec Line #28713wording
  • P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction
  • EP Caterham 7 Spec Line #28498engine
  • P2 Add ESR inlet restrictor #27869induction
  • 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
  • P2 Request for Fly by Wire Rule Wording Change #28247engine
  • EP Request for Help for Datsun 1200 #27934induction
  • EP Request to List Mazda Miata Throttle Body Size #27907induction
  • P2 Request for addition of BMW Engine in P2 Engine Table #27821engine
  • EP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
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 Steenburg1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s149.4Robert Iversen-11.373squal -11.876s90.6%qual 90.2%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+14.828squal +13.565s112.2%qual 111.2%
23 rule changes (EP: 10, P2: 9, SM: 4)6 engine · 4 induction · 4 weight · 3 tyres & wheels · 1 cars added · 1 suspension & brakes · 2 wording · 2 othershowhide
  • P2 Update Engine Table Line E notes #27414engine
  • 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
  • P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine
  • EP Request Miata Eligibility - 2003 #27121other
  • P2 E&O Transmissions #27006tyres & wheels
  • P2 Request to restrict all cars #26246weight
  • EP Allow Firewall Modification for Fitment of 13B into RX8 #26726engine
  • EP Rollcenter Correction Clarification #25873tyres & wheels
  • EP Hardtops #26476wording
  • EP Request for Competition Adjustment for 2nd Generation RX7 #25935weight -50 lbs
  • P2 Change Engine Table Lines B.1 & B.5 #25777engine
  • P2 Change Line A.1 restrictor size #26429induction
  • 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
  • P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine
  • P2 Change CN inlet restrictor implementation date #25816induction
  • P2 Clarify Honda K20A-FD2 parts requirement #25950weight
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 Downey1:28.784Tim Day Jr · fastest of 17 · top 5 within 5.0s1:32.071Chuck Bona · fastest of 18 · top 5 within 0.9s144.4Tim Day Jr-14.447squal -17.044s86.4%qual 83.9%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+8.760squal +8.527s108.2%qual 108.1%
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 0.5s1:31.826Jeff Shafer · fastest of 26 · top 5 within 4.9s1:32.481Jeff Shafer · fastest of 24 · top 5 within 3.8s-17.915squal -17.771s83.8%qual 83.8%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+8.704squal +8.709s107.9%qual 107.9%
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 1.3s1:20.188Jeff Shafer · fastest of 18 · top 5 within 4.0s1:20.904Jeff Shafer · fastest of 16 · top 5 within 2.2s-13.362squal -13.659s85.8%qual 85.4%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+6.498squal +6.667s106.9%qual 107.1%
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 3.3s1:51.825Chris Farrell · fastest of 17 · top 5 within 3.6s1:52.355Jeff Shafer · fastest of 17 · top 5 within 2.8s-12.754squal -11.969s89.8%qual 90.3%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+18.958squal +14.867s115.2%qual 112.0%

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.