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BoP Lab / Classes / GT3

GT3 vs F5 vs SM vs FM pace at every track

Lap times across years say as much about the weather as the class. % of GT3 is each class's best lap as a share of GT3'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-SpecEPvsF5×FAFCFE2FFvsFM×FPFVFXGT1GT2GT3×GTXHPPP2vsSM×SMXSRF3STLSTUT1T2T3T4Show 48 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: GT3 100.0% of GT3 Joe Kristensen, Daytona International Speedway Runoffs 2015 race · F5 96.7% of GT3 Sven de Vries, Indianapolis Motor Speedway Runoffs 2021 race · SM 96.4% of GT3 Travis Wiley, Virginia International Raceway Runoffs 2022 race · FM 94.8% of GT3 Jacob Loomis, Mid-Ohio Sports Car Course Runoffs 2016 qualifying

1:201:402:002:202:4013 rule changes between Runoffs 2018 and Runoffs 201913 ▾25 rule changes between Runoffs 2019 and Runoffs 202025 ▾10 rule changes between Runoffs 2020 and Runoffs 202110 ▾24 rule changes between Runoffs 2021 and Runoffs 202224 ▾11 rule changes between Runoffs 2022 and Runoffs 202311 ▾34 rule changes between Runoffs 2023 and Runoffs 202434 ▾13 rule changes between Runoffs 2024 and Runoffs 202513 ▾4 rule changes between Runoffs 2025 and Runoffs 20264 ▾GT3 race best at Runoffs 2015: 2:03.617 (Joe Kristensen)GT3 race best at Runoffs 2016: 1:31.107 (Joe Kristensen)GT3 race best at Runoffs 2017: 1:46.330 (Collin Jackson)GT3 race best at Runoffs 2018: 1:42.634 (Michael Lewis)GT3 race best at Runoffs 2019: 1:59.045 (Tony Ave)GT3 race best at Runoffs 2020: 2:24.231 (Tony Ave)GT3 race best at Runoffs 2021: 1:46.694 (Troy Ermish)GT3 race best at Runoffs 2022: 2:24.347 (Tony Ave)GT3 race best at Runoffs 2023: 1:59.872 (Tony Ave)GT3 race best at Runoffs 2024: 2:22.863 (Tony Ave)GT3 qualifying best at Runoffs 2015: 2:01.736 (Joe Kristensen)GT3 qualifying best at Runoffs 2016: 1:30.797 (Gary Bockman)GT3 qualifying best at Runoffs 2017: 1:44.579 (Collin Jackson)GT3 qualifying best at Runoffs 2018: 1:40.947 (Michael Lewis)GT3 qualifying best at Runoffs 2019: 1:58.194 (Michael Lewis)GT3 qualifying best at Runoffs 2020: 2:21.882 (Michael Lewis)GT3 qualifying best at Runoffs 2021: 1:44.758 (Troy Ermish)GT3 qualifying best at Runoffs 2022: 1:57.135 (Jeff Dernehl)GT3 qualifying best at Runoffs 2023: 1:58.065 (Tony Ave)GT3 qualifying best at Runoffs 2024: 2:22.108 (Tony Ave)F5 race best at Runoffs 2015: 2:03.298 (Matthew Strand)F5 race best at Runoffs 2016: 1:29.853 (Steven Thompson)F5 race best at Runoffs 2017: 1:42.860 (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 1:42.491 (David Lapham)F5 race best at Runoffs 2019: 1:57.572 (Wiley Mcmahan)F5 race best at Runoffs 2020: 2:21.391 (James Weida)F5 race best at Runoffs 2021: 1:43.140 (Sven de Vries)F5 race best at Runoffs 2022: 2:21.862 (Sven de Vries)F5 qualifying best at Runoffs 2015: 2:01.824 (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 1:28.528 (Calvin Stewart)F5 qualifying best at Runoffs 2017: 1:43.136 (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 1:41.807 (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 1:57.361 (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 2:20.954 (Calvin Stewart)F5 qualifying best at Runoffs 2021: 1:42.619 (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 1:57.689 (James Weida)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)FM race best at Runoffs 2015: 1:58.029 (Joseph Burton-Harris)FM race best at Runoffs 2016: 1:27.922 (Jacob Loomis)FM race best at Runoffs 2017: 1:41.146 (Jarret Voorhies)FM race best at Runoffs 2018: 1:37.909 (Bryce Cornet)FM race best at Runoffs 2019: 2:15.816 (Bryce Cornet)FM qualifying best at Runoffs 2015: 1:57.804 (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 1:26.043 (Jacob Loomis)FM qualifying best at Runoffs 2017: 1:41.231 (Jarret Voorhies)FM qualifying best at Runoffs 2018: 1:37.598 (Bryce Cornet)FM qualifying best at Runoffs 2019: 1:55.124 (Bryce Cornet)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
GT3F5SMFMsolid race · dashed qualifying · slower is lower
95%100%105%110%115%13 rule changes between Runoffs 2018 and Runoffs 201913 ▾25 rule changes between Runoffs 2019 and Runoffs 202025 ▾10 rule changes between Runoffs 2020 and Runoffs 202110 ▾24 rule changes between Runoffs 2021 and Runoffs 202224 ▾11 rule changes between Runoffs 2022 and Runoffs 202311 ▾34 rule changes between Runoffs 2023 and Runoffs 202434 ▾13 rule changes between Runoffs 2024 and Runoffs 202513 ▾4 rule changes between Runoffs 2025 and Runoffs 20264 ▾GT3 race best at Runoffs 2015: 100.0% of GT3's (Joe Kristensen)GT3 race best at Runoffs 2016: 100.0% of GT3's (Joe Kristensen)GT3 race best at Runoffs 2017: 100.0% of GT3's (Collin Jackson)GT3 race best at Runoffs 2018: 100.0% of GT3's (Michael Lewis)GT3 race best at Runoffs 2019: 100.0% of GT3's (Tony Ave)GT3 race best at Runoffs 2020: 100.0% of GT3's (Tony Ave)GT3 race best at Runoffs 2021: 100.0% of GT3's (Troy Ermish)GT3 race best at Runoffs 2022: 100.0% of GT3's (Tony Ave)GT3 race best at Runoffs 2023: 100.0% of GT3's (Tony Ave)GT3 race best at Runoffs 2024: 100.0% of GT3's (Tony Ave)GT3 qualifying best at Runoffs 2015: 100.0% of GT3's (Joe Kristensen)GT3 qualifying best at Runoffs 2016: 100.0% of GT3's (Gary Bockman)GT3 qualifying best at Runoffs 2017: 100.0% of GT3's (Collin Jackson)GT3 qualifying best at Runoffs 2018: 100.0% of GT3's (Michael Lewis)GT3 qualifying best at Runoffs 2019: 100.0% of GT3's (Michael Lewis)GT3 qualifying best at Runoffs 2020: 100.0% of GT3's (Michael Lewis)GT3 qualifying best at Runoffs 2021: 100.0% of GT3's (Troy Ermish)GT3 qualifying best at Runoffs 2022: 100.0% of GT3's (Jeff Dernehl)GT3 qualifying best at Runoffs 2023: 100.0% of GT3's (Tony Ave)GT3 qualifying best at Runoffs 2024: 100.0% of GT3's (Tony Ave)F5 race best at Runoffs 2015: 99.7% of GT3's (Matthew Strand)F5 race best at Runoffs 2016: 98.6% of GT3's (Steven Thompson)F5 race best at Runoffs 2017: 96.7% of GT3's (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 99.9% of GT3's (David Lapham)F5 race best at Runoffs 2019: 98.8% of GT3's (Wiley Mcmahan)F5 race best at Runoffs 2020: 98.0% of GT3's (James Weida)F5 race best at Runoffs 2021: 96.7% of GT3's (Sven de Vries)F5 race best at Runoffs 2022: 98.3% of GT3's (Sven de Vries)F5 qualifying best at Runoffs 2015: 100.1% of GT3's (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 97.5% of GT3's (Calvin Stewart)F5 qualifying best at Runoffs 2017: 98.6% of GT3's (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 100.9% of GT3's (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 99.3% of GT3's (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 99.3% of GT3's (Calvin Stewart)F5 qualifying best at Runoffs 2021: 98.0% of GT3's (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 100.5% of GT3's (James Weida)SM race best at Runoffs 2015: 116.5% of GT3's (Todd Lamb)SM race best at Runoffs 2016: 110.6% of GT3's (Michael Carter)SM race best at Runoffs 2017: 112.0% of GT3's (Michael Gagliardo)SM race best at Runoffs 2018: 112.3% of GT3's (Michael Carter)SM race best at Runoffs 2019: 114.6% of GT3's (Elivan Goulart)SM race best at Runoffs 2020: 113.5% of GT3's (Preston Pardus)SM race best at Runoffs 2021: 111.4% of GT3's (Brian Henderson)SM race best at Runoffs 2022: 96.4% of GT3's (Travis Wiley)SM race best at Runoffs 2023: 113.6% of GT3's (Julian DaCosta)SM race best at Runoffs 2024: 113.0% of GT3's (Brett Kowalski)SM qualifying best at Runoffs 2015: 113.9% of GT3's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 110.7% of GT3's (Justin Hille)SM qualifying best at Runoffs 2017: 113.1% of GT3's (Chris Haldeman)SM qualifying best at Runoffs 2018: 113.3% of GT3's (Ken Sutherland)SM qualifying best at Runoffs 2019: 113.8% of GT3's (Todd Buras)SM qualifying best at Runoffs 2020: 114.3% of GT3's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 112.3% of GT3's (Brian Henderson)SM qualifying best at Runoffs 2022: 115.0% of GT3's (Danny Steyn)SM qualifying best at Runoffs 2023: 114.3% of GT3's (Danny Steyn)SM qualifying best at Runoffs 2024: 113.4% of GT3's (Ethan Goulart)FM race best at Runoffs 2015: 95.5% of GT3's (Joseph Burton-Harris)FM race best at Runoffs 2016: 96.5% of GT3's (Jacob Loomis)FM race best at Runoffs 2017: 95.1% of GT3's (Jarret Voorhies)FM race best at Runoffs 2018: 95.4% of GT3's (Bryce Cornet)FM race best at Runoffs 2019: 114.1% of GT3's (Bryce Cornet)FM qualifying best at Runoffs 2015: 96.8% of GT3's (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 94.8% of GT3's (Jacob Loomis)FM qualifying best at Runoffs 2017: 96.8% of GT3's (Jarret Voorhies)FM qualifying best at Runoffs 2018: 96.7% of GT3's (Bryce Cornet)FM qualifying best at Runoffs 2019: 97.4% of GT3's (Bryce Cornet)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
GT3F5SMFMsolid race · dashed qualifying · each class's best lap as a share of GT3's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventGT3F5SMFM
Qual best Race best Trap Qual best Race best Trap vs GT3 % of GT3 Qual best Race best Trap vs GT3 % of GT3 Qual best Race best Trap vs GT3 % of GT3 
Road America Runoffs 20262026-09-282:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)
4 rule changes (GT3: 2, SM: 2)1 removed · 1 suspension & brakes · 1 wording · 1 othershowhide
  • SM Rear Toe Link #40271other
  • SM Part Number Change Request #39914wording
  • GT3 Remove GT3U from GCR as it is now in STU #39862removed
  • GT3 GT3U Ride Height #39637suspension & brakes
Road America Runoffs 20252025-09-292:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)119.3Francisco Barroso-0.6 mph (-0.5%)
13 rule changes (GT3: 9, SM: 4)6 weight · 1 aero · 1 engine · 1 removed · 1 tyres & wheels · 1 wording · 2 othershowhide
  • GT3 Declassify TCR Cars from GT3/GT3U #38569removed
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • GT3 Clarification of GT3U #38266weight
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • GT3 Correct language regarding OEM Areo Devices #37137aero
  • GT3 VW Funcap weight #37217weight
  • GT3 Pontiac Weight and Chassis Adjustment Request #36938weight -150 lbs
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • GT3 GCR GT3 Disfranchised GT2 #36291weight -75 lbs
  • GT3 Nissan MR20DE Engine Classification Request for GT3 #36791engine
  • GT3 GT3 Mazda 13B PP correction #37057weight -175 lbs
  • GT3 GT3 Mazda12A PP Correction #37058weight -200 lbs
Road America Runoffs 20242024-10-012:22.108Tony Ave · fastest of 13 · top 5 within 3.7s+0.226s (+0.16%)2:22.863Tony Ave · fastest of 13 · top 5 within 3.3s-1.368s (-0.95%)151.2Jeff Dernehl+1.8 mph (+1.2%)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%)+18.623squal +18.998s113.0%qual 113.4%
34 rule changes (GT3: 30, SM: 4)10 engine · 9 weight · 4 cars added · 3 induction · 1 aero · 1 removed · 1 suspension & brakes · 1 tyres & wheels · 3 wording · 1 othershowhide
  • GT3 2024 Mazda 3 TC request for GT3 #36517cars added
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • GT3 Adding Datsun B110 to List of Approved Cars #36198cars added
  • GT3 Honda Civic Type R TCR Weight Reduction Request #36550weight
  • GT3 Correct missed Disenfranchised weight reduction #36237weight
  • GT3 errors & omissions on GT3 Mazda MZR spec lines #36241removed
  • GT3 GT3 +1mm SIR add 175lbs. In #36098induction
  • GT3 Revised GT3 Built Turbocharged chart #36100induction
  • GT3 Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GT3 Mazda MZR Engines #35753engine
  • GT3 Disenfranchised GT2 Acura RSX to Run GT3 #35773weight
  • GT3 Toyota 4Y Engine Request #35885engine
  • GT3 GT3 spec lines clean-up #36008wording
  • GT3 GT3 Honda spec line clean-up x 2 #36009engine
  • GT3 GT3 Mazda spec line clean-up x2 #36010wording
  • GT3 Miata Turbo Clarification #35386induction +100 lbs
  • GT3 Rear Blade Spoiler Clarification #35261aero
  • GT3 GT Direct Injection allowance and rules #35437engine
  • GT3 Request to Include Toyota FA24D Engine for use in GT3 #35199engine
  • GT3 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine
  • GT3 Edit GT3 Nissan QR25DE/DD spec line #35442engine
  • GT3 Disenfranchised GT2 RX7. #35028weight
  • GT3 Turbo Help #35042weight -100 lbs
  • GT3 Competition Adjustment Request for 13B Peripheral Port #35100weight -100 lbs
  • GT3 Request to Include Toyota GR 86 in GT3 #35197cars added
  • GT3 Fastrack Toyota 3S Correction #35258engine
  • GT3 Toyota Engine Classification Request #35019engine
  • GT3 GT3 2.0L SIR & weight #35171weight
  • GT3 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight
  • GT3 GT3 TCR 200 TW tires #34993tyres & wheels
  • GT3 Classify Honda B20 engine in GT3 CRX #34781cars added
Virginia International Raceway Runoffs 20232023-09-231:58.065Tony Ave · fastest of 9 · top 5 within 3.8s+0.930s (+0.79%)1:59.872Tony Ave · fastest of 8 · top 5 within 3.9s-24.475s (-16.96%)145.8Jeff Dernehl-3.6 mph (-2.4%)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%)+16.357squal +16.921s113.6%qual 114.3%
11 rule changes (GT3: 10, SM: 1)3 engine · 3 induction · 2 tyres & wheels · 2 weight · 1 cars addedshowhide
  • GT3 Addendum to letter 33913, GT3 DOT tires. #34627tyres & wheels
  • GT3 Please classify Fields Cardinal V8 #33784cars added
  • GT3 Remove Nissan VG30 engine from GT3 #33609engine
  • GT3 GT3 Choke option effective 1-01-2023 #33669induction
  • GT3 GT3 2.0L choke/weight option #33670weight
  • SM BOP for NB1 and NB2 #32309weight
  • GT3 Turbocharged Engine Rules #33145induction
  • GT3 GT2 (TA2)/GTA Part Number Update #33315induction
  • GT3 GT3 Nissian SR20VET unrestricted ECU change #33432engine
  • GT3 Add 84-87 Civic #33091tyres & wheels
  • GT3 GT3 Turbo Displacement Clarification #32952engine
Virginia International Raceway Runoffs 20222022-09-241:57.135Jeff Dernehl · fastest of 13 · top 5 within 3.2s-1.059s (-0.90%)2:24.347Tony Ave · fastest of 12 · top 5 within 8.2s+25.302s (+21.25%)149.5Jeff Dernehl-0.2 mph (-0.1%)1:57.689James Weida · fastest of 11 · top 5 within 3.9s+0.328s (+0.28%)2:21.862Sven de Vries · fastest of 10 · top 5 within 14.3s+24.290s (+20.66%)142.9Calvin Stewart+0.1 mph (+0.1%)-2.485squal +0.554s98.3%qual 100.5%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%)-5.240squal +17.529s96.4%qual 115.0%
24 rule changes (GT3: 17, F5: 6, SM: 1)9 cars added · 4 engine · 2 induction · 2 suspension & brakes · 2 weight · 1 aero · 1 tyres & wheels · 1 wording · 2 othershowhide
  • F5 Intake Boots Correction #33028induction
  • GT3 Tail lights on all GT category race cars. #32799suspension & brakes
  • F5 Ensure availability of ECU for Rotax engines #32695engine
  • GT3 SR20VET Engine Option Request #32648engine
  • F5 Clarify stepped exhaust header references #32743engine
  • GT3 Correct Model GT3 - Fiat #32776wording
  • F5 593 carb boot availability and oil pump clarification #32527induction
  • GT3 Correct Fiat Spider Years #32149cars added
  • GT3 wheel size addition #32247tyres & wheels
  • GT3 GT3 TCR Car Feedback #31677weight +2 lbs
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • F5 E&O class name #32194other
  • GT3 Request to Classify Ginetta G40 in GT3 #31598cars added
  • GT3 Normally Aspirated 2.0L DOHC MZR Motor #31733cars added
  • GT3 Volvo S60 in GT3 #31970cars added
  • GT3 GT3 2.0L 4V engines now unrestricted. #32190engine
  • GT3 TB correction to wing wording #32191aero
  • GT3 Request to add Fiat to GT3 CARS #31803cars added
  • GT3 Request to add Fiat to GT3 CARS #31804cars added
  • F5 Data Box Mounting Plate #31638other
  • GT3 31032 correction to weight #31525weight -210 lbs
  • GT3 Add TCR cars to GT3 #31540cars added
  • GT3 Please approve 1964-1968 Ford Cortina GT for competition in GT# #30941cars added
  • GT3 Request car classification #31032cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:44.758Troy Ermish · fastest of 14 · top 5 within 4.6s+0.179s (+0.17%)1:46.694Troy Ermish · fastest of 13 · top 5 within 4.1s+0.364s (+0.34%)145.8Stacy Wilson1:42.619Ryan Mayfield · fastest of 22 · top 5 within 1.6s-0.517s (-0.50%)1:43.140Sven de Vries · fastest of 20 · top 5 within 1.7s+0.280s (+0.27%)144.4James Weida-3.554squal -2.139s96.7%qual 98.0%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+12.143squal +12.937s111.4%qual 112.3%
10 rule changes (GT3: 6, F5: 3, SM: 1)3 induction · 1 cars added · 1 engine · 1 tyres & wheels · 2 wording · 2 othershowhide
  • F5 Clarify allowable assisted shifting systems #30871wording
  • F5 Request to correct terminology #30976tyres & wheels
  • GT3 Request to Update GTA Obsolete Part Numbers #30615wording
  • GT3 Request to Permit FP cars in GT3 #30611other
  • F5 Request to Allow Rotax 593 HO Engine #30712engine
  • GT3 Mazda MZR 2.0L Engine #30455induction
  • GT3 Disfranchised GT3 Mazda, correct choke size #30570induction
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • GT3 Mazda MZR SIR Sizing #29555induction
  • GT3 Request to Classify 1992-1997 Honda Prelude #29687cars added
Road America Runoffs 20202020-10-022:21.882Michael Lewis · fastest of 12 · top 5 within 3.0s2:24.231Tony Ave · fastest of 12 · top 5 within 3.0s149.5Jeff Dernehl2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s2:21.391James Weida · fastest of 14 · top 5 within 1.5s143.2Aaron Ellis-2.840squal -0.928s98.0%qual 99.3%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+19.517squal +20.327s113.5%qual 114.3%
25 rule changes (GT3: 17, F5: 6, SM: 2)7 induction · 4 aero · 4 cars added · 4 engine · 1 suspension & brakes · 1 weight · 4 othershowhide
  • F5 Request to Update Suzuki Engine Years for F500 #29453engine
  • SM Radiator E&O Clarifications #29294engine
  • GT3 GT Category Wording #29193induction
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • F5 Request for Cockpit Adjustment of External Jetting Devices #28359other
  • F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine
  • F5 Re letter requesting driver adjustable carb mixture #28840other
  • F5 #28359 WDYT Request for Cockpit Adjustment #28875other
  • GT3 Request to add Mazda 12A Peripheral Port to GT3 rule set #28842cars added
  • GT3 TA2 Gurney flap wicker clarification #28874aero
  • GT3 STO Gurney flap wicker clarification #28883aero
  • GT3 GT Gurney flap wicker clarification #28909aero
  • GT3 GT3 4v SIR size increase. #28931induction
  • GT3 Request for Addition to GT3 Approved Turbo List #27576induction
  • GT3 Request Nissan KA24E specifications #28808weight
  • GT3 Error Regarding Mazda Engine Listing #28119engine +245 lbs
  • GT3 Windshield Clips #27323other
  • F5 Change 600cc restrictor size #27883induction
  • GT3 Request Factory Five Daytona coupe classification #26308cars added
  • GT3 Request restrictor size change request #26958induction
  • GT3 Request to Classify Alfa Romeo 4C #27322cars added
  • GT3 Request for Mazda 2.5l MZR/L5-VE #27570induction -245 lbs
  • GT3 GT3 turbo engines add Honda #28033induction
  • GT3 GT3 wing end plate #28035aero
  • GT3 Request to Add SR16VE to GT-3 Spec Lines #27357cars added
Virginia International Raceway Runoffs 20192019-10-051:58.194Michael Lewis · fastest of 17 · top 5 within 2.2s1:59.045Tony Ave · fastest of 16 · top 5 within 1.7s149.6Jeff Dernehl1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s142.8Eric McRee-1.473squal -0.833s98.8%qual 99.3%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+17.414squal +16.358s114.6%qual 113.8%1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s135.7Bryce Cornet+16.771squal -3.070s114.1%qual 97.4%
13 rule changes (GT3: 8, F5: 1, SM: 4)4 weight · 3 cars added · 2 engine · 1 induction · 1 suspension & brakes · 1 tyres & wheels · 1 wordingshowhide
  • F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs
  • GT3 Requesting Increase in Choke Diameter for Mazda 12A Bridgeport #27043induction
  • GT3 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine
  • GT3 Request to Classify Ligier JS2 R #26535cars added
  • GT3 26076 revised Spec line chart #26528weight
  • GT3 Request Ride Height Clarification #26600suspension & brakes
  • GT3 Request clarification on bridge porting for rotary #26076weight
  • GT3 Request to add 4G69 Mitsubishi #26154cars added
  • 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
  • GT3 GTX Homologation table update #26034cars added
Sonoma Raceway Runoffs 20182018-10-101:40.947Michael Lewis · fastest of 10 · top 5 within 3.8s1:42.634Michael Lewis · fastest of 8 · top 5 within 4.4s115.7Collin Jackson1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s1:42.491David Lapham · fastest of 5 · top 5 within 9.5s113.3David Lapham-0.143squal +0.860s99.9%qual 100.9%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+12.644squal +13.408s112.3%qual 113.3%1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s124.1Melvin David Kemper Jr-4.725squal -3.349s95.4%qual 96.7%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:44.579Collin Jackson · fastest of 17 · top 5 within 5.0s1:46.330Collin Jackson · fastest of 15 · top 5 within 3.1s1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s-3.470squal -1.443s96.7%qual 98.6%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+12.770squal +13.727s112.0%qual 113.1%1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s-5.184squal -3.348s95.1%qual 96.8%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:30.797Gary Bockman · fastest of 15 · top 5 within 2.0s1:31.107Joe Kristensen · fastest of 14 · top 5 within 2.5s1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s-1.254squal -2.269s98.6%qual 97.5%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+9.657squal +9.717s110.6%qual 110.7%1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s-3.185squal -4.754s96.5%qual 94.8%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:01.736Joe Kristensen · fastest of 11 · top 5 within 3.0s2:03.617Joe Kristensen · fastest of 10 · top 5 within 1.8s2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s-0.319squal +0.088s99.7%qual 100.1%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+20.450squal +16.925s116.5%qual 113.9%1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s-5.588squal -3.932s95.5%qual 96.8%

By track

TrackEvents Typical % of GT3 Best Latest 
Road America4100.0%2 of 4 with GT3100.0%Runoffs 2020100.0%Runoffs 2024
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 GT3'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.