BoP Labbeta

BoP Lab / Classes / AS

AS vs P1 vs GTL pace at every track

Lap times across years say as much about the weather as the class. % of AS is each class's best lap as a share of AS'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)
AS×B-Spec+EP+FA+FC+FE2+FF+FP+FV+FX+GT1+GT2+vsGTL×GTX+HP+P+vsP1×P2+SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 49 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: AS 100.0% of AS Andy McDermid, Daytona International Speedway Runoffs 2015 race · P1 80.5% of AS Perry Richardson, Sonoma Raceway Runoffs 2018 race · GTL 99.2% of AS Troy Ermish, Sonoma Raceway Runoffs 2018 race

1:402:002:2031 rule changes between Runoffs 2018 and Runoffs 201931 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾33 rule changes between Runoffs 2020 and Runoffs 202133 ▾15 rule changes between Runoffs 2021 and Runoffs 202215 ▾18 rule changes between Runoffs 2022 and Runoffs 202318 ▾33 rule changes between Runoffs 2023 and Runoffs 202433 ▾14 rule changes between Runoffs 2024 and Runoffs 202514 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾AS race best at Runoffs 2015: 2:02.922 (Andy McDermid)AS race best at Runoffs 2016: 1:33.424 (Edward Hosni)AS race best at Runoffs 2017: 1:51.507 (Bryan Long)AS race best at Runoffs 2018: 1:50.345 (John Heinricy)AS race best at Runoffs 2019: 2:03.900 (James Jost)AS race best at Runoffs 2020: 2:27.668 (Gregory Eaton)AS race best at Runoffs 2021: 1:50.606 (Gregory Eaton)AS race best at Runoffs 2022: 2:04.578 (Gregory Eaton)AS race best at Runoffs 2023: 2:04.120 (Gregory Eaton)AS race best at Runoffs 2024: 2:26.429 (Gregory Eaton)AS race best at Runoffs 2025: 2:29.232 (Gregory Eaton)AS race best at Runoffs 2026: 2:28.471 (Andrew McDermid)AS qualifying best at Runoffs 2015: 2:01.746 (Tom Sloe)AS qualifying best at Runoffs 2016: 1:30.651 (Tom Sloe)AS qualifying best at Runoffs 2017: 1:45.220 (James Jost)AS qualifying best at Runoffs 2018: 1:47.782 (Andrew McDermid)AS qualifying best at Runoffs 2019: 2:02.938 (Gregory Eaton)AS qualifying best at Runoffs 2020: 2:27.045 (Gregory Eaton)AS qualifying best at Runoffs 2021: 1:50.427 (Drew Cattell)AS qualifying best at Runoffs 2022: 2:02.162 (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 2:03.082 (Daniel Richardson)AS qualifying best at Runoffs 2024: 2:26.578 (Gregory Eaton)AS qualifying best at Runoffs 2025: 2:26.792 (Andrew McDermid)AS qualifying best at Runoffs 2026: 2:26.911 (Andrew McDermid)P1 race best at Runoffs 2015: 1:49.792 (Gianpaolo Ciancimino)Off the chart: P1 race best at Runoffs 2016: 1:19.407 (Gianpaolo Ciancimino)P1 race best at Runoffs 2017: 1:31.499 (Jim Devenport)P1 race best at Runoffs 2018: 1:28.786 (Perry Richardson)P1 race best at Runoffs 2019: 1:43.498 (Todd Slusher)P1 race best at Runoffs 2020: 2:01.870 (James French)P1 race best at Runoffs 2021: 1:29.225 (Lee Alexander)P1 race best at Runoffs 2022: 1:54.095 (John Mcaleer)P1 race best at Runoffs 2023: 1:44.329 (Todd Vanacore)P1 race best at Runoffs 2024: 2:00.418 (Matt Romer)P1 qualifying best at Runoffs 2015: 1:49.219 (Jim Downing)Off the chart: P1 qualifying best at Runoffs 2016: 1:17.308 (James Devenport)P1 qualifying best at Runoffs 2017: 1:30.794 (Jim Devenport)P1 qualifying best at Runoffs 2018: 1:27.714 (Todd Slusher)P1 qualifying best at Runoffs 2019: 1:42.674 (Todd Slusher)P1 qualifying best at Runoffs 2020: 2:01.101 (James French)P1 qualifying best at Runoffs 2021: 1:29.011 (Lee Alexander)P1 qualifying best at Runoffs 2022: 1:41.601 (Todd Slusher)P1 qualifying best at Runoffs 2023: 1:42.602 (Todd Vanacore)P1 qualifying best at Runoffs 2024: 2:00.476 (Chip Romer)GTL race best at Runoffs 2015: 2:13.564 (Jim Dentici)GTL race best at Runoffs 2016: 1:35.912 (Kyle Disque)GTL race best at Runoffs 2017: 1:52.068 (Christopher Bovis)GTL race best at Runoffs 2018: 1:49.458 (Troy Ermish)GTL race best at Runoffs 2019: 2:07.837 (Bill Ball)GTL race best at Runoffs 2020: 2:31.601 (Peter Shadowen)GTL race best at Runoffs 2021: 1:51.952 (Scott Twomey)GTL race best at Runoffs 2022: 2:21.180 (Michael Lewis)GTL race best at Runoffs 2023: 2:11.277 (Graham Fuller)GTL race best at Runoffs 2024: 2:30.844 (Chris Bovis)GTL qualifying best at Runoffs 2015: 2:11.387 (Jim Dentici)GTL qualifying best at Runoffs 2016: 1:35.377 (Wilson Wright)GTL qualifying best at Runoffs 2017: 1:50.331 (Christopher Bovis)GTL qualifying best at Runoffs 2018: 1:47.885 (Troy Ermish)GTL qualifying best at Runoffs 2019: 2:06.997 (Peter Shadowen)GTL qualifying best at Runoffs 2020: 2:31.943 (Chris Bovis)GTL qualifying best at Runoffs 2021: 1:51.819 (Christopher Bovis)GTL qualifying best at Runoffs 2022: 2:07.789 (Peter Shadowen)GTL qualifying best at Runoffs 2023: 2:09.564 (Peter Shadowen)GTL qualifying best at Runoffs 2024: 2:30.858 (Peter Shadowen)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
ASP1GTLsolid race · dashed qualifying · slower is lower
80%90%100%110%31 rule changes between Runoffs 2018 and Runoffs 201931 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾33 rule changes between Runoffs 2020 and Runoffs 202133 ▾15 rule changes between Runoffs 2021 and Runoffs 202215 ▾18 rule changes between Runoffs 2022 and Runoffs 202318 ▾33 rule changes between Runoffs 2023 and Runoffs 202433 ▾14 rule changes between Runoffs 2024 and Runoffs 202514 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾AS race best at Runoffs 2015: 100.0% of AS's (Andy McDermid)AS race best at Runoffs 2016: 100.0% of AS's (Edward Hosni)AS race best at Runoffs 2017: 100.0% of AS's (Bryan Long)AS race best at Runoffs 2018: 100.0% of AS's (John Heinricy)AS race best at Runoffs 2019: 100.0% of AS's (James Jost)AS race best at Runoffs 2020: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2021: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2022: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2023: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2024: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2025: 100.0% of AS's (Gregory Eaton)AS race best at Runoffs 2026: 100.0% of AS's (Andrew McDermid)AS qualifying best at Runoffs 2015: 100.0% of AS's (Tom Sloe)AS qualifying best at Runoffs 2016: 100.0% of AS's (Tom Sloe)AS qualifying best at Runoffs 2017: 100.0% of AS's (James Jost)AS qualifying best at Runoffs 2018: 100.0% of AS's (Andrew McDermid)AS qualifying best at Runoffs 2019: 100.0% of AS's (Gregory Eaton)AS qualifying best at Runoffs 2020: 100.0% of AS's (Gregory Eaton)AS qualifying best at Runoffs 2021: 100.0% of AS's (Drew Cattell)AS qualifying best at Runoffs 2022: 100.0% of AS's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 100.0% of AS's (Daniel Richardson)AS qualifying best at Runoffs 2024: 100.0% of AS's (Gregory Eaton)AS qualifying best at Runoffs 2025: 100.0% of AS's (Andrew McDermid)AS qualifying best at Runoffs 2026: 100.0% of AS's (Andrew McDermid)P1 race best at Runoffs 2015: 89.3% of AS's (Gianpaolo Ciancimino)P1 race best at Runoffs 2016: 85.0% of AS's (Gianpaolo Ciancimino)P1 race best at Runoffs 2017: 82.1% of AS's (Jim Devenport)P1 race best at Runoffs 2018: 80.5% of AS's (Perry Richardson)P1 race best at Runoffs 2019: 83.5% of AS's (Todd Slusher)P1 race best at Runoffs 2020: 82.5% of AS's (James French)P1 race best at Runoffs 2021: 80.7% of AS's (Lee Alexander)P1 race best at Runoffs 2022: 91.6% of AS's (John Mcaleer)P1 race best at Runoffs 2023: 84.1% of AS's (Todd Vanacore)P1 race best at Runoffs 2024: 82.2% of AS's (Matt Romer)P1 qualifying best at Runoffs 2015: 89.7% of AS's (Jim Downing)P1 qualifying best at Runoffs 2016: 85.3% of AS's (James Devenport)P1 qualifying best at Runoffs 2017: 86.3% of AS's (Jim Devenport)P1 qualifying best at Runoffs 2018: 81.4% of AS's (Todd Slusher)P1 qualifying best at Runoffs 2019: 83.5% of AS's (Todd Slusher)P1 qualifying best at Runoffs 2020: 82.4% of AS's (James French)P1 qualifying best at Runoffs 2021: 80.6% of AS's (Lee Alexander)P1 qualifying best at Runoffs 2022: 83.2% of AS's (Todd Slusher)P1 qualifying best at Runoffs 2023: 83.4% of AS's (Todd Vanacore)P1 qualifying best at Runoffs 2024: 82.2% of AS's (Chip Romer)GTL race best at Runoffs 2015: 108.7% of AS's (Jim Dentici)GTL race best at Runoffs 2016: 102.7% of AS's (Kyle Disque)GTL race best at Runoffs 2017: 100.5% of AS's (Christopher Bovis)GTL race best at Runoffs 2018: 99.2% of AS's (Troy Ermish)GTL race best at Runoffs 2019: 103.2% of AS's (Bill Ball)GTL race best at Runoffs 2020: 102.7% of AS's (Peter Shadowen)GTL race best at Runoffs 2021: 101.2% of AS's (Scott Twomey)Off the chart: GTL race best at Runoffs 2022: 113.3% of AS's (Michael Lewis)GTL race best at Runoffs 2023: 105.8% of AS's (Graham Fuller)GTL race best at Runoffs 2024: 103.0% of AS's (Chris Bovis)GTL qualifying best at Runoffs 2015: 107.9% of AS's (Jim Dentici)GTL qualifying best at Runoffs 2016: 105.2% of AS's (Wilson Wright)GTL qualifying best at Runoffs 2017: 104.9% of AS's (Christopher Bovis)GTL qualifying best at Runoffs 2018: 100.1% of AS's (Troy Ermish)GTL qualifying best at Runoffs 2019: 103.3% of AS's (Peter Shadowen)GTL qualifying best at Runoffs 2020: 103.3% of AS's (Chris Bovis)GTL qualifying best at Runoffs 2021: 101.3% of AS's (Christopher Bovis)GTL qualifying best at Runoffs 2022: 104.6% of AS's (Peter Shadowen)GTL qualifying best at Runoffs 2023: 105.3% of AS's (Peter Shadowen)GTL qualifying best at Runoffs 2024: 102.9% of AS's (Peter Shadowen)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
ASP1GTLsolid race · dashed qualifying · each class's best lap as a share of AS's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventASP1GTL
Qual best Race best Trap Qual best Race best Trap vs AS % of AS Qual best Race best Trap vs AS % of AS 
Road America Runoffs 20262026-09-282:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)151.0Andrew McDermid-0.6 mph (-0.4%)
14 rule changes (AS: 13, GTL: 1)5 weight · 3 engine · 2 removed · 2 tyres & wheels · 1 induction · 1 othershowhide
  • AS 2016+ Camaro Spec Line Full Prep #39646tyres & wheels
  • AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheels
  • AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094other
  • AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239weight
  • AS Errors and Omissions #40532weight
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • GTL Remove GT3U from GCR as it is now in STU #39862removed
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • AS 1994 Mustang Spec Line Request #39104engine
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
Road America Runoffs 20252025-09-292:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)151.5Andrew McDermid+1.9 mph (+1.3%)
14 rule changes (AS: 11, GTL: 3)6 engine · 4 weight · 2 induction · 1 aero · 1 othershowhide
  • AS RE: Previous Letter 37695 Update #38245weight -75 lbs
  • AS Errors and Omissions #38234engine
  • AS Errors and Omission #38055induction
  • AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197engine
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • AS Race memo #37902engine
  • AS Increase Coyote Engine Restrictor to 80mm #36177induction
  • AS Performance Pack for 2015+ Mustang #36867weight
  • AS Gear Ratios #37131engine
  • AS ECU specs for LS engine #37208engine
  • GTL Correct language regarding OEM Areo Devices #37137aero
  • GTL G16E-GTS Fuel Injection Spec Line Change #36588engine
  • GTL GTL Alternate Weight and Choke Option for L16 engine #36653weight
Road America Runoffs 20242024-10-012:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)149.6Gregory Eaton+0.4 mph (+0.3%)2:00.476Chip Romer · fastest of 12 · top 5 within 1.5s-0.625s (-0.52%)2:00.418Matt Romer · fastest of 9 · top 5 within 2.1s-1.452s (-1.19%)168.3Jason Miller+8.7 mph (+5.4%)-26.011squal -26.102s82.2%qual 82.2%2:30.858Peter Shadowen · fastest of 14 · top 5 within 4.4s-1.085s (-0.71%)2:30.844Chris Bovis · fastest of 13 · top 5 within 3.7s-0.757s (-0.50%)133.3Peter Shadowen+1.8 mph (+1.4%)+4.415squal +4.280s103.0%qual 102.9%
33 rule changes (AS: 11, P1: 6, GTL: 16)11 cars added · 8 engine · 5 weight · 4 induction · 1 aero · 1 tyres & wheels · 3 othershowhide
  • AS Mustang transmission ratios #36662engine
  • GTL Request to Include Toyota GR86 in GTL #36324cars added
  • GTL Inclusion of Modified Spec Miata for GTL competition #36325cars added
  • GTL Include Mazda MX5 RF 2017- in GTL #36428cars added
  • GTL Add GTL to GT3 choke option line. #36236induction
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • AS 6th gen Camaro limited prep #35733cars added
  • AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars added
  • AS Full Prep Head #35891other
  • GTL Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GTL Allow 34 mm chokes for the Datsun 510 #35661induction +50 lbs
  • P1 Update GCR section 9.1.8.B.J.7 #35907engine
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars added
  • AS Fuel Cell 12 #34194other
  • AS Please Classify the 6th Gen Into AS. #35448cars added
  • AS spec lines #35713cars added
  • P1 Remove redundant effective date language in GCR 9.1.8.B.J.4 #35693induction
  • P1 Correct engine series terminology #35694engine
  • GTL Rear Blade Spoiler Clarification #35261aero
  • GTL GT Direct Injection allowance and rules #35437engine
  • GTL GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine
  • GTL Rotary Engine 12A Rotor Housings #35131engine
  • GTL Request to Include Toyota GR86 in GTL #35198cars added
  • GTL Errors and Omissions, GTL engines & Cars #35226engine
  • P1 Please correct omitted punctuation #34890weight
  • P1 Adjust restrictors and weights for Engine Table lines H and I #35229induction
  • P1 Revise Group CN Honda K20A-FD2 Spec Line #35337weight
  • GTL Small Engines in GT Lite #34842engine
  • GTL Request to Classify Honda Fit body in GTL #35020cars added
  • GTL Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight
  • GTL Weight for Nissan Sentra/200SX A 1400's #34918weight -50 lbs
Virginia International Raceway Runoffs 20232023-09-232:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)154.6James Jost+3.7 mph (+2.5%)1:42.602Todd Vanacore · fastest of 10 · top 5 within 0.9s+1.001s (+0.99%)1:44.329Todd Vanacore · fastest of 9 · top 5 within 0.7s-9.766s (-8.56%)158.5Jason Miller+1.2 mph (+0.8%)-19.791squal -20.480s84.1%qual 83.4%2:09.564Peter Shadowen · fastest of 11 · top 5 within 4.9s+1.775s (+1.39%)2:11.277Graham Fuller · fastest of 10 · top 5 within 2.4s-9.903s (-7.01%)142.7Peter Shadowen+6.7 mph (+4.9%)+7.157squal +6.482s105.8%qual 105.3%
18 rule changes (AS: 4, P1: 7, GTL: 7)5 engine · 4 induction · 3 tyres & wheels · 2 aero · 2 weight · 1 cars added · 1 suspension & brakesshowhide
  • AS Crate Motor Part Numbers #32944engine
  • AS Request wheel size change #33007tyres & wheels
  • AS Alternative Upper Front Control Arms for Dodge Challenger #33352engine
  • AS Front Brake Caliper Adapters for Dodge Challenger #33353suspension & brakes
  • P1 SIR Testing #34354induction
  • P1 E&O Single Inlet Restrictor abbreviation, etc. #34369induction
  • P1 E&O Clean up ducted air provision #34410tyres & wheels
  • GTL Please classify Fields Cardinal V8 #33784cars added
  • P1 E&O - Correct dimensional equivalents #34018tyres & wheels
  • P1 November 2022 Rules Clarification for Suspension Covers #33615aero
  • GTL Toyota 4Y Engine Classification Request #33562engine
  • GTL Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine
  • GTL Fiat HP Limited Prep X1/9 Weight in GTL #33297weight
  • GTL GT2 (TA2)/GTA Part Number Update #33315induction
  • GTL Request to add Ford Festiva to GTL #33335weight
  • GTL Engine Request #33064engine
  • P1 Clarify body panel coverage of suspension components #33318aero
  • P1 E&O clarification regarding forced induction #33123induction
Virginia International Raceway Runoffs 20222022-09-242:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)150.9James Jost-3.0 mph (-2.0%)1:41.601Todd Slusher · fastest of 9 · top 5 within 2.3s-1.073s (-1.05%)1:54.095John Mcaleer · fastest of 9 · top 5 within 1.4s+10.597s (+10.24%)157.2Jason Miller+1.3 mph (+0.8%)-10.483squal -20.561s91.6%qual 83.2%2:07.789Peter Shadowen · fastest of 14 · top 5 within 2.2s+0.792s (+0.62%)2:21.180Michael Lewis · fastest of 13 · top 5 within 2.1s+13.343s (+10.44%)136.0Peter Shadowen+4.9 mph (+3.7%)+16.602squal +5.627s113.3%qual 104.6%
15 rule changes (AS: 9, P1: 3, GTL: 3)3 weight · 2 cars added · 2 suspension & brakes · 1 engine · 1 induction · 1 tyres & wheels · 2 wording · 3 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • GTL Tail lights on all GT category race cars. #32799suspension & brakes
  • P1 Clarify authorization to use flat plate intake restrictor #32964induction
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • P1 E&O Clarification of Bodywork Rules #32468tyres & wheels
  • GTL Request to Classify Ginetta G40 in GTL #31599cars added
  • AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295other
  • AS specification line consolidation and correction #31846wording
  • AS correction of SMG specification line #31847suspension & brakes
  • AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engine
  • P1 Displacement & Weight Change Request for 2-Cycle 6 Cylinder #31609weight
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
  • GTL Request car classification #31032cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)153.8James Jost1:29.011Lee Alexander · fastest of 13 · top 5 within 2.5s-1.783s (-1.96%)1:29.225Lee Alexander · fastest of 12 · top 5 within 3.5s-2.274s (-2.49%)160.1Jason Miller-21.381squal -21.416s80.7%qual 80.6%1:51.819Christopher Bovis · fastest of 22 · top 5 within 1.8s+1.488s (+1.35%)1:51.952Scott Twomey · fastest of 19 · top 5 within 1.7s-0.116s (-0.10%)129.5Brian Linn+1.346squal +1.392s101.2%qual 101.3%
33 rule changes (AS: 14, P1: 11, GTL: 8)12 weight · 9 engine · 4 cars added · 2 induction · 1 tyres & wheels · 3 wording · 2 othershowhide
  • P1 Move 2000cc and 2300cc engine options to individual spec lines #31012engine
  • P1 E&O Spec Line B notes #31095weight
  • GTL Request to Update GTA Obsolete Part Numbers #30615wording
  • P1 Add 1355cc spec line #30890weight
  • GTL Request clarification for the Honda B18a,bVS B18c #30482weight
  • GTL Request to Allow Hood Bulge on Nissan B13 Sentra #30504other
  • GTL Request BMW E21 Classing #30582tyres & wheels
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428cars added
  • AS American Sedan Transmission Rule Change Request #30595weight
  • AS Correction to specifications inadvertently deleted #30691wording
  • AS weight adjustments #30700weight +50 lbs
  • P1 E&O tonneau cover provision in cockpit opening section #30458other
  • P1 Update Spec Line B Notes #30498weight
  • P1 Update Spec Lines C and G notes #30499weight
  • P1 E&O Maximum Valves Per Cylinder #30559engine
  • P1 Clean up Spec Line A notes section #30424engine
  • P1 Clean up Spec Line H notes section #30425engine
  • AS AS Mustang LP 4.6 3V Classification Transmission Request #29886weight
  • AS Request CF driveshaft on CTS-V for durability improvement #30117engine
  • AS Adjustment to model years of 5th generation RP Camaro #30348engine
  • GTL Request for Help for Mazda 12A #29754weight +50 lbs
  • P1 DP02 Sealed 2ltr Engine Option #30038engine
  • P1 E&O restrictor terminology #30285induction
  • GTL Request LP HP Fiat X1/9 & Bertone 1500 to GTL #30058cars added
  • AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars added
  • AS Request Trunk lid / Rear Hatch clarification #29591wording
  • AS Common Weight for CTS-V Tire #29759weight
  • AS Correction to specifications inadvertently deleted #30041cars added
  • GTL Please Add GTL Nissan 1.8L Engine MRA8DE #29805engine
  • GTL Increase 13b SIR size #29867induction
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
Road America Runoffs 20202020-10-022:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton2:01.101James French · fastest of 18 · top 5 within 1.1s2:01.870James French · fastest of 17 · top 5 within 1.8s159.7David Locke-25.798squal -25.944s82.5%qual 82.4%2:31.943Chris Bovis · fastest of 14 · top 5 within 6.3s2:31.601Peter Shadowen · fastest of 14 · top 5 within 7.2s131.4Peter Shadowen+3.933squal +4.898s102.7%qual 103.3%
37 rule changes (AS: 16, P1: 4, GTL: 17)8 aero · 8 induction · 6 weight · 5 cars added · 3 engine · 2 suspension & brakes · 2 tyres & wheels · 3 othershowhide
  • GTL GT Category Wording #29193induction
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • GTL Request to change the Mazda 13b restrictor size #28518induction +175 lbs
  • AS Support for R-Type Specification Tires #27450tyres & wheels
  • AS Spec Tire Request #27519tyres & wheels
  • AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675induction
  • AS 2005-2009 Restricted Prep 4.6 3V #27908engine
  • AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engine
  • AS Request for Full Preparation Classification for 2010-2014 Camaro #28030other
  • AS Cylinder Heads #28696engine
  • AS Request for Max Rotor Diameter Change #28748suspension & brakes
  • AS Request increase rotor diameter #28797other
  • GTL Request to classify 1999-2007 Toyota MR2 Spyder body #28870cars added
  • GTL TA2 Gurney flap wicker clarification #28874aero
  • GTL STO Gurney flap wicker clarification #28883aero
  • GTL GT Gurney flap wicker clarification #28909aero
  • GTL Mazda 13b Restrictor Size Follow up to Letter 28518 #29015induction
  • GTL Stall Test #28709induction
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • GTL GTL Wing Rule #28754aero
  • P1 E&O minimum weights and intake manifolds #28731induction
  • GTL Wing Mounting Upright Size #27641aero
  • GTL Wing Mounting Upright Size #27641aero
  • GTL GTL wing end plates addition #28243aero
  • GTL Clarification to letter #27406 #28309weight -50 lbs
  • AS Rear Trailing Arms #28007suspension & brakes
  • AS Weight reduction for cars running iron heads #28010weight
  • AS 05-10 Mustang with HR cam classification #28226cars added
  • AS 10-15 Camaro Full Prep classification #28227cars added
  • GTL Windshield Clips #27323other
  • P1 Extend date for removing sealed DP02-spec 2.0L option #28046weight
  • GTL Request Factory Five Daytona coupe classification #26308cars added
  • GTL Request to Classify the MK1 two door Jetta #27648cars added
  • P1 Remove sealed DP02-spec 2.0 MZR spec #26753induction
  • P1 Update Revised Spec Line F #27745weight
  • GTL 88-91 Honda CRX Spec Line Correction #27233weight
Virginia International Raceway Runoffs 20192019-10-052:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost1:42.674Todd Slusher · fastest of 14 · top 5 within 1.5s1:43.498Todd Slusher · fastest of 13 · top 5 within 1.0s155.9Jim Devenport-20.402squal -20.264s83.5%qual 83.5%2:06.997Peter Shadowen · fastest of 19 · top 5 within 4.0s2:07.837Bill Ball · fastest of 18 · top 5 within 4.2s131.1Peter Shadowen+3.937squal +4.059s103.2%qual 103.3%
31 rule changes (AS: 4, P1: 14, GTL: 13)7 engine · 5 cars added · 5 weight · 4 induction · 2 suspension & brakes · 2 tyres & wheels · 1 removed · 2 wording · 3 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • GTL Fun Cup Beetle #27334weight
  • AS Request Ride Height Clarification #26598suspension & brakes
  • GTL GTL #26960weight
  • P1 E&O Transmissions #27098other
  • GTL Request CRZ wheelbase change #26896tyres & wheels
  • P1 E&O Transmissions #27005tyres & wheels
  • P1 Move minimum height provision to #27031removed
  • P1 Remove duplicative fender louver provision #27033induction
  • AS Request to Revert to 2017 Weights #25885weight
  • P1 Missing word E&O #26919other
  • P1 E&O correction to GCR 9.1.8.C.C. #26927wording
  • GTL Request to Classify VW Fun Cup Beetle #25986cars added
  • GTL Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine
  • GTL Request to Classify Ligier JS2 R #26535cars added
  • GTL Request for GTL Mazda 13B SIR Increase with Penalty #26572engine
  • P1 Clean up reference to engine table #26648engine
  • P1 Remove redundant spec line #26692engine
  • GTL Request Ride Height Clarification #26600suspension & brakes
  • P1 Clean Up Engine Table Language #26590engine
  • GTL Request Mazda 12a Rotary SIR Increase #26081induction
  • GTL Request to Classify Mustang 2 Body in GTL #26222cars added
  • P1 Move single-seat closed cockpit provision to #26376wording
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • P1 Correct errors in GCR section 9.1.8.C.J #26144engine
  • GTL Request for GTL Mini Adjustments #25754weight
  • GTL BMC thru Rover Group remove long inactive mini #25771weight
  • GTL GTX Homologation table update #26034cars added
  • P1 Remove redundant inlet restrictor provisions #25877induction
  • P1 Clarify Honda K20A-FD2 parts requirement #25949engine
  • P1 Correct GCR section 9.1.8.C.J errors #25966induction
Sonoma Raceway Runoffs 20182018-10-101:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi1:27.714Todd Slusher · fastest of 19 · top 5 within 2.1s1:28.786Perry Richardson · fastest of 19 · top 5 within 0.9s144.0Johnnie Crean-21.559squal -20.068s80.5%qual 81.4%1:47.885Troy Ermish · fastest of 20 · top 5 within 4.5s1:49.458Troy Ermish · fastest of 19 · top 5 within 3.6s109.3Charles Leonard-0.887squal +0.103s99.2%qual 100.1%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s1:30.794Jim Devenport · fastest of 19 · top 5 within 2.8s1:31.499Jim Devenport · fastest of 16 · top 5 within 2.2s-20.008squal -14.426s82.1%qual 86.3%1:50.331Christopher Bovis · fastest of 26 · top 5 within 1.5s1:52.068Christopher Bovis · fastest of 20 · top 5 within 1.0s+0.561squal +5.111s100.5%qual 104.9%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s1:17.308James Devenport · fastest of 14 · top 5 within 2.7s1:19.407Gianpaolo Ciancimino · fastest of 13 · top 5 within 1.8s-14.017squal -13.343s85.0%qual 85.3%1:35.377Wilson Wright · fastest of 28 · top 5 within 1.2s1:35.912Kyle Disque · fastest of 28 · top 5 within 1.1s+2.488squal +4.726s102.7%qual 105.2%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s1:49.219Jim Downing · fastest of 9 · top 5 within 2.2s1:49.792Gianpaolo Ciancimino · fastest of 10 · top 5 within 1.7s-13.130squal -12.527s89.3%qual 89.7%2:11.387Jim Dentici · fastest of 10 · top 5 within 2.2s2:13.564Jim Dentici · fastest of 9 · top 5 within 2.0s+10.642squal +9.641s108.7%qual 107.9%

By track

TrackEvents Typical % of AS 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 AS'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.