BoP Labbeta

BoP Lab / Classes / P2

P2 vs STL vs SRF3 vs SM pace at every track

Lap times across years say as much about the weather as the class. % of P2 is each class's best lap as a share of P2'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-SpecEPFAFCFE2FFFPFVFXGT1GT2GTXHPPP2×vsSM×SMXvsSRF3×vsSTL×STUT1T2T3T4Show 51 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: P2 100.0% of P2 Jeff Shafer, Daytona International Speedway Runoffs 2015 race · STL 94.1% of P2 Danny Steyn, Virginia International Raceway Runoffs 2022 race · SRF3 104.6% of P2 Franklin Futrelle, Virginia International Raceway Runoffs 2022 race · SM 102.4% of P2 Travis Wiley, Virginia International Raceway Runoffs 2022 race

1:402:002:202:4027 rule changes between Runoffs 2018 and Runoffs 201927 ▾26 rule changes between Runoffs 2019 and Runoffs 202026 ▾30 rule changes between Runoffs 2020 and Runoffs 202130 ▾19 rule changes between Runoffs 2021 and Runoffs 202219 ▾15 rule changes between Runoffs 2022 and Runoffs 202315 ▾23 rule changes between Runoffs 2023 and Runoffs 202423 ▾11 rule changes between Runoffs 2024 and Runoffs 202511 ▾8 rule changes between Runoffs 2025 and Runoffs 20268 ▾P2 race best at Runoffs 2015: 1:52.355 (Jeff Shafer)Off the chart: 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)Off the chart: 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)STL race best at Runoffs 2015: 2:10.269 (Kevin Boehm)STL race best at Runoffs 2016: 1:36.625 (Kevin Boehm)STL race best at Runoffs 2017: 1:52.589 (Eric Kutil)STL race best at Runoffs 2018: 1:49.754 (Danny Steyn)STL race best at Runoffs 2019: 2:07.273 (Cliff Ira)STL race best at Runoffs 2020: 2:32.115 (Joe Moser)STL race best at Runoffs 2021: 2:02.711 (Joe Moser)STL race best at Runoffs 2022: 2:07.832 (Danny Steyn)STL race best at Runoffs 2023: 2:06.682 (Joe Moser)STL race best at Runoffs 2024: 2:30.245 (Joe Moser)STL race best at Runoffs 2025: 2:32.127 (Jose Osiris Pena)STL race best at Runoffs 2026: 2:30.657 (Danny Steyn)STL qualifying best at Runoffs 2015: 2:09.672 (Kevin Boehm)STL qualifying best at Runoffs 2016: 1:35.439 (John Schmitt)STL qualifying best at Runoffs 2017: 1:52.647 (Adam Roberts)STL qualifying best at Runoffs 2018: 1:49.138 (Danny Steyn)STL qualifying best at Runoffs 2019: 2:07.203 (Danny Steyn)STL qualifying best at Runoffs 2020: 2:31.420 (Danny Steyn)STL qualifying best at Runoffs 2021: 1:51.665 (Danny Steyn)STL qualifying best at Runoffs 2022: 2:05.474 (Danny Steyn)STL qualifying best at Runoffs 2023: 2:05.779 (Danny Steyn)STL qualifying best at Runoffs 2024: 2:30.063 (Joe Moser)STL qualifying best at Runoffs 2025: 2:32.065 (Jose Osiris Pena)STL qualifying best at Runoffs 2026: 2:30.537 (Derek Ketchie)SRF3 race best at Runoffs 2015: 2:10.215 (Chad Galloway)SRF3 race best at Runoffs 2016: 1:34.947 (Cliff White)SRF3 race best at Runoffs 2017: 1:49.782 (Tray Ayres)SRF3 race best at Runoffs 2018: 1:47.053 (TJ Acker)SRF3 race best at Runoffs 2019: 2:04.755 (Bobby Sak)SRF3 race best at Runoffs 2020: 2:31.038 (Justin Hille)SRF3 race best at Runoffs 2021: 1:50.095 (John Black)SRF3 race best at Runoffs 2022: 2:22.066 (Franklin Futrelle)SRF3 race best at Runoffs 2023: 2:04.911 (David Ogburn)SRF3 race best at Runoffs 2024: 2:28.129 (S Sandy Satullo III)SRF3 race best at Runoffs 2025: 2:29.839 (Morgan Burkhard)SRF3 race best at Runoffs 2026: 2:29.257 (Peyton Long)SRF3 qualifying best at Runoffs 2015: 2:08.557 (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 1:34.363 (John Black)SRF3 qualifying best at Runoffs 2017: 1:49.824 (John Black)SRF3 qualifying best at Runoffs 2018: 1:46.117 (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 2:04.624 (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 2:29.786 (TJ Acker)SRF3 qualifying best at Runoffs 2021: 1:49.520 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 2:03.716 (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 2:03.842 (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 2:27.773 (Denny Stripling)SRF3 qualifying best at Runoffs 2025: 2:28.226 (Bobby Sak)SRF3 qualifying best at Runoffs 2026: 2:27.443 (Tyler Stephens)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)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
P2STLSRF3SMsolid race · dashed qualifying · slower is lower
100%110%120%130%27 rule changes between Runoffs 2018 and Runoffs 201927 ▾26 rule changes between Runoffs 2019 and Runoffs 202026 ▾30 rule changes between Runoffs 2020 and Runoffs 202130 ▾19 rule changes between Runoffs 2021 and Runoffs 202219 ▾15 rule changes between Runoffs 2022 and Runoffs 202315 ▾23 rule changes between Runoffs 2023 and Runoffs 202423 ▾11 rule changes between Runoffs 2024 and Runoffs 202511 ▾8 rule changes between Runoffs 2025 and Runoffs 20268 ▾P2 race best at Runoffs 2015: 100.0% of P2's (Jeff Shafer)P2 race best at Runoffs 2016: 100.0% of P2's (Jeff Shafer)P2 race best at Runoffs 2017: 100.0% of P2's (Jeff Shafer)P2 race best at Runoffs 2018: 100.0% of P2's (Chuck Bona)P2 race best at Runoffs 2019: 100.0% of P2's (Greg Gyann)P2 race best at Runoffs 2020: 100.0% of P2's (Robert Iversen)P2 race best at Runoffs 2021: 100.0% of P2's (Tim Day Jr)P2 race best at Runoffs 2022: 100.0% of P2's (Greg Gyann)P2 race best at Runoffs 2023: 100.0% of P2's (Lucian Pancea)P2 race best at Runoffs 2024: 100.0% of P2's (Bart Wolf)P2 race best at Runoffs 2026: 100.0% of P2's (Mike Reupert)P2 qualifying best at Runoffs 2015: 100.0% of P2's (Chris Farrell)P2 qualifying best at Runoffs 2016: 100.0% of P2's (Jeff Shafer)P2 qualifying best at Runoffs 2017: 100.0% of P2's (Jeff Shafer)P2 qualifying best at Runoffs 2018: 100.0% of P2's (Tim Day Jr)P2 qualifying best at Runoffs 2019: 100.0% of P2's (Robert Iversen)P2 qualifying best at Runoffs 2020: 100.0% of P2's (Robert Iversen)P2 qualifying best at Runoffs 2021: 100.0% of P2's (Tim Day Jr)P2 qualifying best at Runoffs 2022: 100.0% of P2's (Tim Day Jr)P2 qualifying best at Runoffs 2023: 100.0% of P2's (Greg Gyann)P2 qualifying best at Runoffs 2024: 100.0% of P2's (Bart Wolf)P2 qualifying best at Runoffs 2026: 100.0% of P2's (Greg Gyann)STL race best at Runoffs 2015: 115.9% of P2's (Kevin Boehm)STL race best at Runoffs 2016: 119.4% of P2's (Kevin Boehm)STL race best at Runoffs 2017: 121.7% of P2's (Eric Kutil)STL race best at Runoffs 2018: 119.2% of P2's (Danny Steyn)STL race best at Runoffs 2019: 115.4% of P2's (Cliff Ira)STL race best at Runoffs 2020: 117.2% of P2's (Joe Moser)STL race best at Runoffs 2021: 128.7% of P2's (Joe Moser)Off the chart: STL race best at Runoffs 2022: 94.1% of P2's (Danny Steyn)STL race best at Runoffs 2023: 116.4% of P2's (Joe Moser)STL race best at Runoffs 2024: 117.1% of P2's (Joe Moser)STL race best at Runoffs 2026: 116.4% of P2's (Danny Steyn)STL qualifying best at Runoffs 2015: 116.0% of P2's (Kevin Boehm)STL qualifying best at Runoffs 2016: 119.0% of P2's (John Schmitt)STL qualifying best at Runoffs 2017: 122.7% of P2's (Adam Roberts)STL qualifying best at Runoffs 2018: 122.9% of P2's (Danny Steyn)STL qualifying best at Runoffs 2019: 116.6% of P2's (Danny Steyn)STL qualifying best at Runoffs 2020: 117.8% of P2's (Danny Steyn)STL qualifying best at Runoffs 2021: 119.8% of P2's (Danny Steyn)STL qualifying best at Runoffs 2022: 116.6% of P2's (Danny Steyn)STL qualifying best at Runoffs 2023: 115.8% of P2's (Danny Steyn)STL qualifying best at Runoffs 2024: 117.8% of P2's (Joe Moser)STL qualifying best at Runoffs 2026: 115.3% of P2's (Derek Ketchie)SRF3 race best at Runoffs 2015: 115.9% of P2's (Chad Galloway)SRF3 race best at Runoffs 2016: 117.4% of P2's (Cliff White)SRF3 race best at Runoffs 2017: 118.7% of P2's (Tray Ayres)SRF3 race best at Runoffs 2018: 116.3% of P2's (TJ Acker)SRF3 race best at Runoffs 2019: 113.1% of P2's (Bobby Sak)SRF3 race best at Runoffs 2020: 116.4% of P2's (Justin Hille)SRF3 race best at Runoffs 2021: 115.5% of P2's (John Black)SRF3 race best at Runoffs 2022: 104.6% of P2's (Franklin Futrelle)SRF3 race best at Runoffs 2023: 114.8% of P2's (David Ogburn)SRF3 race best at Runoffs 2024: 115.4% of P2's (S Sandy Satullo III)SRF3 race best at Runoffs 2026: 115.3% of P2's (Peyton Long)SRF3 qualifying best at Runoffs 2015: 115.0% of P2's (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 117.7% of P2's (John Black)SRF3 qualifying best at Runoffs 2017: 119.6% of P2's (John Black)SRF3 qualifying best at Runoffs 2018: 119.5% of P2's (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 114.2% of P2's (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 116.6% of P2's (TJ Acker)SRF3 qualifying best at Runoffs 2021: 117.5% of P2's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 115.0% of P2's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 114.0% of P2's (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 116.0% of P2's (Denny Stripling)SRF3 qualifying best at Runoffs 2026: 112.9% of P2's (Tyler Stephens)SM race best at Runoffs 2015: 128.2% of P2's (Todd Lamb)SM race best at Runoffs 2016: 124.5% of P2's (Michael Carter)SM race best at Runoffs 2017: 128.8% of P2's (Michael Gagliardo)SM race best at Runoffs 2018: 125.2% of P2's (Michael Carter)SM race best at Runoffs 2019: 123.8% of P2's (Elivan Goulart)SM race best at Runoffs 2020: 126.2% of P2's (Preston Pardus)SM race best at Runoffs 2021: 124.7% of P2's (Brian Henderson)SM race best at Runoffs 2022: 102.4% of P2's (Travis Wiley)SM race best at Runoffs 2023: 125.2% of P2's (Julian DaCosta)SM race best at Runoffs 2024: 125.8% of P2's (Brett Kowalski)SM race best at Runoffs 2026: 125.7% of P2's (Francisco Barroso)SM qualifying best at Runoffs 2015: 124.0% of P2's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 125.3% of P2's (Justin Hille)SM qualifying best at Runoffs 2017: 128.8% of P2's (Chris Haldeman)SM qualifying best at Runoffs 2018: 128.8% of P2's (Ken Sutherland)SM qualifying best at Runoffs 2019: 123.3% of P2's (Todd Buras)SM qualifying best at Runoffs 2020: 126.2% of P2's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 126.2% of P2's (Brian Henderson)SM qualifying best at Runoffs 2022: 125.2% of P2's (Danny Steyn)SM qualifying best at Runoffs 2023: 124.3% of P2's (Danny Steyn)SM qualifying best at Runoffs 2024: 126.5% of P2's (Ethan Goulart)SM qualifying best at Runoffs 2026: 124.2% of P2's (Brett Kowalski)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
P2STLSRF3SMsolid race · dashed qualifying · each class's best lap as a share of P2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventP2STLSRF3SM
Qual best Race best Trap Qual best Race best Trap vs P2 % of P2 Qual best Race best Trap vs P2 % of P2 Qual best Race best Trap vs P2 % of P2 
Road America Runoffs 20262026-09-282:10.606Greg 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%)2:30.537Derek Ketchie · fastest of 16 · top 5 within 2.9s-1.528s (-1.00%)2:30.657Danny Steyn · fastest of 16 · top 5 within 0.6s-1.470s (-0.97%)134.8Mike Taylor+2.6 mph (+2.0%)+21.216squal +19.931s116.4%qual 115.3%2:27.443Tyler Stephens · fastest of 44 · top 5 within 0.3s-0.783s (-0.53%)2:29.257Peyton Long · fastest of 42 · top 5 within 0.3s-0.582s (-0.39%)134.1Bobby Sak+0.4 mph (+0.3%)+19.816squal +16.837s115.3%qual 112.9%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%)+33.284squal +31.567s125.7%qual 124.2%
8 rule changes (STL: 4, SRF3: 2, SM: 2)3 weight · 1 removed · 1 wording · 3 othershowhide
  • SM Rear Toe Link #40271other
  • STL Spec Line Clean Up #40344removed
  • STL Calculating Weight #40224weight
  • SM Part Number Change Request #39914wording
  • STL Classifications #39885weight
  • SRF3 SRF3 Spark Plugs #39899other
  • STL Weight adjustment for STL #39579weight
  • SRF3 Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:32.065Jose Osiris Pena · fastest of 14 · top 5 within 3.4s+2.002s (+1.33%)2:32.127Jose Osiris Pena · fastest of 13 · top 5 within 2.4s+1.882s (+1.25%)132.2Jon Sewell-2.1 mph (-1.5%)2:28.226Bobby Sak · fastest of 43 · top 5 within 0.6s+0.453s (+0.31%)2:29.839Morgan Burkhard · fastest of 42 · top 5 within 0.3s+1.710s (+1.15%)133.7Bobby Sak-1.5 mph (-1.1%)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%)
11 rule changes (P2: 1, STL: 3, SRF3: 3, SM: 4)4 weight · 2 tyres & wheels · 1 wording · 4 othershowhide
  • SRF3 SRF Rule Updates #38853weight
  • STL Lotus Weight Reduction #38772weight -50 lbs
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • STL E&O: SMX Allowance in STL #37945weight
  • SRF3 Driver Safety & Comfort #37966other
  • SRF3 Update SADEV transmission specs #37992other
  • P2 2000 cc Pinto Engine Car Weight #37187weight
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • STL Request to Remove Miata Hubs from General category #37138tyres & wheels
Road America Runoffs 20242024-10-012:07.405Bart 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%)2:30.063Joe Moser · fastest of 18 · top 5 within 3.7s-1.357s (-0.90%)2:30.245Joe Moser · fastest of 16 · top 5 within 4.2s-1.870s (-1.23%)134.3Joe Moser+1.3 mph (+1.0%)+21.923squal +22.658s117.1%qual 117.8%2:27.773Denny Stripling · fastest of 57 · top 5 within 0.3s-2.013s (-1.34%)2:28.129S Sandy Satullo III · fastest of 52 · top 5 within 0.7s-2.909s (-1.93%)135.2Denny Stripling+3.4 mph (+2.6%)+19.807squal +20.368s115.4%qual 116.0%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%)+33.164squal +33.701s125.8%qual 126.5%
23 rule changes (P2: 5, STL: 4, SRF3: 10, SM: 4)5 engine · 4 suspension & brakes · 4 tyres & wheels · 3 weight · 2 induction · 1 wording · 4 othershowhide
  • SRF3 Update SRF3 Air Filter Rule #36681other
  • SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF3 Hoosier Tire Decal Placement #36739tyres & wheels
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels
  • SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • SRF3 SRF3 Alternator Pulley Update In #36095weight
  • P2 CN Spec ECU #35835engine
  • P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels
  • STL ST Electric-Assisted Steering Systems #35066other
  • STL BOP Adjustments #35112weight
  • STL Mazda 12A #35320induction
  • 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
  • SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF3 SRF / SRF3 Rule Updates #35268weight
  • STL Alternate Carburetor Request for 79-85 RX7 12a #35181induction
  • P2 Correct Table 1 for Engine Date Range Specifications #35182engine
  • SRF3 SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-231:48.590Greg 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%)2:05.779Danny Steyn · fastest of 22 · top 5 within 3.4s+0.305s (+0.24%)2:06.682Joe Moser · fastest of 20 · top 5 within 1.5s-1.150s (-0.90%)131.8Danny Steyn+0.1 mph (+0.1%)+17.853squal +17.189s116.4%qual 115.8%2:03.842Morgan Burkhard · fastest of 40 · top 5 within 0.2s+0.126s (+0.10%)2:04.911David Ogburn · fastest of 39 · top 5 within 0.3s-17.155s (-12.08%)134.5Bobby Sak+0.1 mph (+0.0%)+16.082squal +15.252s114.8%qual 114.0%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%)+27.400squal +26.396s125.2%qual 124.3%
15 rule changes (P2: 8, STL: 2, SRF3: 4, SM: 1)6 tyres & wheels · 4 weight · 2 engine · 1 cars added · 1 suspension & brakes · 1 wordingshowhide
  • SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • STL Clarify STL table B - IT spec notes on Tires #34187tyres & wheels
  • P2 Clarify minimum side body height requirement #34143tyres & wheels
  • P2 Clarify closed cockpit single seat car allowance #34144wording
  • SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • P2 Remove redundant effective date language and update engine table #34012engine
  • P2 E&O - Correct dimensional equivalents #34038weight
  • SRF3 Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels
  • 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
  • STL Spec MX5 in STL #33473tyres & wheels
Virginia International Raceway Runoffs 20222022-09-241:47.566Tim 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%)2:05.474Danny Steyn · fastest of 24 · top 5 within 2.3s-1.729s (-1.36%)2:07.832Danny Steyn · fastest of 22 · top 5 within 1.9s+0.559s (+0.44%)131.7Trever Degioanni-3.2 mph (-2.3%)-8.002squal +17.908s94.1%qual 116.6%2:03.716Franklin Futrelle · fastest of 44 · top 5 within 0.6s-0.908s (-0.73%)2:22.066Franklin Futrelle · fastest of 40 · top 5 within 1.2s+17.311s (+13.88%)134.5David Ogburn+2.1 mph (+1.6%)+6.232squal +16.150s104.6%qual 115.0%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%)+3.273squal +27.098s102.4%qual 125.2%
19 rule changes (P2: 10, STL: 5, SRF3: 3, SM: 1)5 tyres & wheels · 3 weight · 2 engine · 2 induction · 2 suspension & brakes · 1 aero · 2 wording · 2 othershowhide
  • SRF3 SRF Tire Rule Update #32614tyres & wheels
  • SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes
  • P2 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels
  • P2 Clean up P2 wording #32525wording
  • P2 After Market to Aftermarket #32373other
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • P2 Add spec line for Beasley B2 #32147weight
  • P2 E&O Table 1 spec line wing terminology #32148aero
  • P2 E&O class name #32196other
  • STL Single TB Weight Modifiers #31449weight
  • STL Improved Touring Tires #32063tyres & wheels
  • P2 E&O Engine section #31969engine
  • P2 E&O letter #31539 – Control Area definition #31783tyres & wheels
  • STL Throttling Device Clarification #31323induction
  • STL Mazda Renesis Restriction #31467induction
  • STL Clarification of 79-85 RX7 Spec line #31621wording
  • P2 BoP adjustment effective 1-1-22 #31538engine
  • P2 E&O clarification of "Control Area" definition #31539tyres & wheels
  • SRF3 Three Updates to SRF Rules #31523weight
Indianapolis Motor Speedway Runoffs 20212021-09-251:33.235Tim 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 Iversen1:51.665Danny Steyn · fastest of 42 · top 5 within 1.7s-0.982s (-0.87%)2:02.711Joe Moser · fastest of 37 · top 5 within 3.2s+10.122s (+8.99%)131.8Max Gee+27.389squal +18.430s128.7%qual 119.8%1:49.520Franklin Futrelle · fastest of 84 · top 5 within 0.5s-0.304s (-0.28%)1:50.095John Black · fastest of 82 · top 5 within 0.2s+0.313s (+0.29%)132.1Matthew Horst+14.773squal +16.285s115.5%qual 117.5%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+23.515squal +24.460s124.7%qual 126.2%
30 rule changes (P2: 8, STL: 15, SRF3: 6, SM: 1)7 engine · 3 induction · 3 suspension & brakes · 3 tyres & wheels · 3 weight · 2 aero · 1 cars added · 1 wording · 7 othershowhide
  • P2 P2 CN Engine Rebuild Clarification #31000engine
  • STL Request to clean up Spec MX-5 Redundancy #31069other
  • P2 F5 P2 Conversion #30856other
  • P2 Clarify minimum body width requirement #30859tyres & wheels
  • SRF3 SRF Wet Tires #30849tyres & wheels
  • SRF3 SADEV-SRF3 Transmission #30926other
  • SRF3 SRF Update Maintenance, Repairs and Seals #30961engine
  • SRF3 SRF3 Alternator Pulley #30684weight
  • STL VW Engine Request #30625engine
  • 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
  • STL Solstice Ride Height #30183suspension & brakes
  • STL Request Mazda B5 DOHC #30420cars added
  • STL Honda B16A (JDM) Restrictor change #30531induction
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • STL ST Oil Coolers E&O Correction to 9.1.4.2.H #30388wording
  • P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine
  • SRF3 Mandatory identification: #30223engine
  • STL GM Ecotec engines in STL #30247engine
  • STL Super Touring Alternate Miata Hubs #30345tyres & wheels
  • STL Brake Component Relocation #29990suspension & brakes
  • STL Super Touring Wing Clarification #30111aero
  • STL Transmission Options #30118other
  • STL Request for FWD and RWD Parity #29728weight
  • STL Request to Remove Honda F20C 2% Weight Penalty #29815weight
  • STL Request for FWD and RWD Parity #30023induction
  • P2 Balance of Performance adjustments effective 01-01-2021 #29822induction
  • SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
  • STL Request clarification on wing measurement #29640aero
Road America Runoffs 20202020-10-022:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s153.1Robert Iversen2:31.420Danny Steyn · fastest of 33 · top 5 within 3.1s2:32.115Joe Moser · fastest of 30 · top 5 within 1.5s132.9Darin Treakle+22.322squal +22.906s117.2%qual 117.8%2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s131.9Charles Russell Turner+21.245squal +21.272s116.4%qual 116.6%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+33.955squal +33.695s126.2%qual 126.2%
26 rule changes (P2: 6, STL: 11, SRF3: 7, SM: 2)6 induction · 5 engine · 5 suspension & brakes · 2 aero · 2 cars added · 2 tyres & wheels · 2 weight · 1 wording · 1 othershowhide
  • SM Radiator E&O Clarifications #29294engine
  • P2 E&O clarification of P2 rear wing requirements #29205aero
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • STL Minimum Weight Determination #27695weight
  • STL ST Gurney flap Wicker clarification #29012aero
  • STL Request for Addition to GT3 Approved Turbo List #27576induction
  • P2 Classify Elan NP01 in P2 Table 1 #28812cars added
  • SRF3 SRF Shocks #28791suspension & brakes
  • STL Request to add 2016-2019 GMX-5 Spec line #28604cars added
  • STL Request to update PN for MX-5 #28622wording
  • STL Correction - Clarification Honda/Acura B18B engine Letter # 26209 #28873engine
  • P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction
  • SRF3 Update Bump Stop Rule #28712suspension & brakes
  • SRF3 SRF Bump Stop Correction #27019suspension & brakes
  • STL STL Honda B18 restrictor changes #28794induction
  • P2 Add ESR inlet restrictor #27869induction
  • STL Change GM LNF 2.0 Allowance to LSJ Engine for Viable STL 2.0 #27884engine
  • STL Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat #28663induction
  • STL Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53 #28664induction
  • P2 Request for Fly by Wire Rule Wording Change #28247engine
  • STL Request to add wheel part numbers #28342tyres & wheels
  • P2 Request for addition of BMW Engine in P2 Engine Table #27821engine
  • SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • SRF3 SRF Tire Warmer Rule #27622tyres & wheels
  • SRF3 SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF3 SRF / SRF3 Majors & Regional Class Updates #27723other
Virginia International Raceway Runoffs 20192019-10-051:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s149.4Robert Iversen2:07.203Danny Steyn · fastest of 36 · top 5 within 1.8s2:07.273Cliff Ira · fastest of 35 · top 5 within 1.4s134.8Cliff Ira+17.015squal +18.092s115.4%qual 116.6%2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s132.4Bobby Sak+14.497squal +15.513s113.1%qual 114.2%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+26.201squal +25.441s123.8%qual 123.3%
27 rule changes (P2: 9, STL: 11, SRF3: 3, SM: 4)7 weight · 6 engine · 4 induction · 3 suspension & brakes · 2 tyres & wheels · 1 cars added · 2 wording · 2 othershowhide
  • P2 Update Engine Table Line E notes #27414engine
  • STL Request to Classify Spec MX-5 Challenge in STL #27399cars added
  • P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine
  • P2 E&O Transmissions #27006tyres & wheels
  • SRF3 SRF Dash Windscreen Kit #27028other
  • STL Request clarification for manifold and throttle in STU #27004induction
  • P2 Request to restrict all cars #26246weight
  • SRF3 New SRF Sectional Nose Rule Addition #26914other
  • STL Request Restrictor Plate correction #26779induction
  • SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes
  • STL Request Ride Height Clarification #26597suspension & brakes
  • 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
  • STL Request to Allow VW 1.8L Engine #25614engine
  • STL Request to reduce weight of RX8 with Renesis rotary #25781weight -100 lbs
  • STL Request for Open Brake Pads On Mazda MX-5 Cup NC #25821suspension & brakes
  • STL Request to clarify B18C1 GSR Honda B motor table #26209weight
  • STL Port Matching #26415wording
  • 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
  • STL Request to equalize FPR Reduction on all B-Series Vtec Engines #24746weight
  • STL Request E&O for Mazda Miata Spec Line #25955weight
Sonoma Raceway Runoffs 20182018-10-101:28.784Tim Day Jr · fastest of 17 · top 5 within 5.0s1:32.071Chuck Bona · fastest of 18 · top 5 within 0.9s144.4Tim Day Jr1:49.138Danny Steyn · fastest of 19 · top 5 within 2.5s1:49.754Danny Steyn · fastest of 17 · top 5 within 2.5s103.2Craig McHaffie+17.683squal +20.354s119.2%qual 122.9%1:46.117Robeson Clay Russell · fastest of 36 · top 5 within 0.5s1:47.053TJ Acker · fastest of 35 · top 5 within 0.2s110.2Steve Fogg+14.982squal +17.333s116.3%qual 119.5%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+23.207squal +25.571s125.2%qual 128.8%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:31.826Jeff Shafer · fastest of 26 · top 5 within 4.9s1:32.481Jeff Shafer · fastest of 24 · top 5 within 3.8s1:52.647Adam Roberts · fastest of 57 · top 5 within 0.8s1:52.589Eric Kutil · fastest of 50 · top 5 within 1.2s+20.108squal +20.821s121.7%qual 122.7%1:49.824John Black · fastest of 101 · top 5 within 0.5s1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s+17.301squal +17.998s118.7%qual 119.6%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+26.619squal +26.480s128.8%qual 128.8%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:20.188Jeff Shafer · fastest of 18 · top 5 within 4.0s1:20.904Jeff Shafer · fastest of 16 · top 5 within 2.2s1:35.439John Schmitt · fastest of 34 · top 5 within 1.5s1:36.625Kevin Boehm · fastest of 31 · top 5 within 0.6s+15.721squal +15.251s119.4%qual 119.0%1:34.363John Black · fastest of 41 · top 5 within 0.5s1:34.947Cliff White · fastest of 39 · top 5 within 0.3s+14.043squal +14.175s117.4%qual 117.7%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+19.860squal +20.326s124.5%qual 125.3%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:51.825Chris Farrell · fastest of 17 · top 5 within 3.6s1:52.355Jeff Shafer · fastest of 17 · top 5 within 2.8s2:09.672Kevin Boehm · fastest of 37 · top 5 within 2.5s2:10.269Kevin Boehm · fastest of 37 · top 5 within 2.1s+17.914squal +17.847s115.9%qual 116.0%2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s+17.860squal +16.732s115.9%qual 115.0%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+31.712squal +26.836s128.2%qual 124.0%

By track

TrackEvents Typical % of P2 Best Latest 
Road America4100.0%3 of 4 with P2100.0%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 P2'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.