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BoP Lab / Classes / GTL

GTL vs FM vs SRF3 vs FB pace at every track

Lap times across years say as much about the weather as the class. % of GTL is each class's best lap as a share of GTL'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-SpecEPFAvsFB×FCFE2FFvsFM×FPFVFXGT1GT2GTL×GTXHPPP2SMSMXvsSRF3×STLSTUT1T2T3T4Show 48 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: GTL 100.0% of GTL Jim Dentici, Daytona International Speedway Runoffs 2015 race · FM 88.4% of GTL Joseph Burton-Harris, Daytona International Speedway Runoffs 2015 race · SRF3 95.2% of GTL David Ogburn, Virginia International Raceway Runoffs 2023 race · FB 82.1% of GTL J R Osborne, Sonoma Raceway Runoffs 2018 qualifying

1:201:402:002:2016 rule changes between Runoffs 2018 and Runoffs 201916 ▾24 rule changes between Runoffs 2019 and Runoffs 202024 ▾14 rule changes between Runoffs 2020 and Runoffs 202114 ▾6 rule changes between Runoffs 2021 and Runoffs 20226 ▾11 rule changes between Runoffs 2022 and Runoffs 202311 ▾26 rule changes between Runoffs 2023 and Runoffs 202426 ▾6 rule changes between Runoffs 2024 and Runoffs 20256 ▾3 rule changes between Runoffs 2025 and Runoffs 20263 ▾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)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)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)FB race best at Runoffs 2015: 1:51.616 (J R Osborne)FB race best at Runoffs 2016: 1:21.015 (Jeremy Hill)FB race best at Runoffs 2017: 1:33.702 (Alex Mayer)FB race best at Runoffs 2018: 1:31.189 (J R Osborne)FB race best at Runoffs 2019: 1:57.688 (Pete Frost)FB qualifying best at Runoffs 2015: 1:50.711 (J R Osborne)FB qualifying best at Runoffs 2016: 1:19.886 (Alex Mayer)FB qualifying best at Runoffs 2017: 1:33.746 (Gary Hickman)FB qualifying best at Runoffs 2018: 1:28.612 (J R Osborne)FB qualifying best at Runoffs 2019: 1:54.469 (Pete Frost)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
GTLFMSRF3FBsolid race · dashed qualifying · slower is lower
85%90%95%100%16 rule changes between Runoffs 2018 and Runoffs 201916 ▾24 rule changes between Runoffs 2019 and Runoffs 202024 ▾14 rule changes between Runoffs 2020 and Runoffs 202114 ▾6 rule changes between Runoffs 2021 and Runoffs 20226 ▾11 rule changes between Runoffs 2022 and Runoffs 202311 ▾26 rule changes between Runoffs 2023 and Runoffs 202426 ▾6 rule changes between Runoffs 2024 and Runoffs 20256 ▾3 rule changes between Runoffs 2025 and Runoffs 20263 ▾GTL race best at Runoffs 2015: 100.0% of GTL's (Jim Dentici)GTL race best at Runoffs 2016: 100.0% of GTL's (Kyle Disque)GTL race best at Runoffs 2017: 100.0% of GTL's (Christopher Bovis)GTL race best at Runoffs 2018: 100.0% of GTL's (Troy Ermish)GTL race best at Runoffs 2019: 100.0% of GTL's (Bill Ball)GTL race best at Runoffs 2020: 100.0% of GTL's (Peter Shadowen)GTL race best at Runoffs 2021: 100.0% of GTL's (Scott Twomey)GTL race best at Runoffs 2022: 100.0% of GTL's (Michael Lewis)GTL race best at Runoffs 2023: 100.0% of GTL's (Graham Fuller)GTL race best at Runoffs 2024: 100.0% of GTL's (Chris Bovis)GTL qualifying best at Runoffs 2015: 100.0% of GTL's (Jim Dentici)GTL qualifying best at Runoffs 2016: 100.0% of GTL's (Wilson Wright)GTL qualifying best at Runoffs 2017: 100.0% of GTL's (Christopher Bovis)GTL qualifying best at Runoffs 2018: 100.0% of GTL's (Troy Ermish)GTL qualifying best at Runoffs 2019: 100.0% of GTL's (Peter Shadowen)GTL qualifying best at Runoffs 2020: 100.0% of GTL's (Chris Bovis)GTL qualifying best at Runoffs 2021: 100.0% of GTL's (Christopher Bovis)GTL qualifying best at Runoffs 2022: 100.0% of GTL's (Peter Shadowen)GTL qualifying best at Runoffs 2023: 100.0% of GTL's (Peter Shadowen)GTL qualifying best at Runoffs 2024: 100.0% of GTL's (Peter Shadowen)FM race best at Runoffs 2015: 88.4% of GTL's (Joseph Burton-Harris)FM race best at Runoffs 2016: 91.7% of GTL's (Jacob Loomis)FM race best at Runoffs 2017: 90.3% of GTL's (Jarret Voorhies)FM race best at Runoffs 2018: 89.4% of GTL's (Bryce Cornet)Off the chart: FM race best at Runoffs 2019: 106.2% of GTL's (Bryce Cornet)FM qualifying best at Runoffs 2015: 89.7% of GTL's (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 90.2% of GTL's (Jacob Loomis)FM qualifying best at Runoffs 2017: 91.8% of GTL's (Jarret Voorhies)FM qualifying best at Runoffs 2018: 90.5% of GTL's (Bryce Cornet)FM qualifying best at Runoffs 2019: 90.7% of GTL's (Bryce Cornet)SRF3 race best at Runoffs 2015: 97.5% of GTL's (Chad Galloway)SRF3 race best at Runoffs 2016: 99.0% of GTL's (Cliff White)SRF3 race best at Runoffs 2017: 98.0% of GTL's (Tray Ayres)SRF3 race best at Runoffs 2018: 97.8% of GTL's (TJ Acker)SRF3 race best at Runoffs 2019: 97.6% of GTL's (Bobby Sak)SRF3 race best at Runoffs 2020: 99.6% of GTL's (Justin Hille)SRF3 race best at Runoffs 2021: 98.3% of GTL's (John Black)SRF3 race best at Runoffs 2022: 100.6% of GTL's (Franklin Futrelle)SRF3 race best at Runoffs 2023: 95.2% of GTL's (David Ogburn)SRF3 race best at Runoffs 2024: 98.2% of GTL's (S Sandy Satullo III)SRF3 qualifying best at Runoffs 2015: 97.8% of GTL's (Kerry Jacobsen)SRF3 qualifying best at Runoffs 2016: 98.9% of GTL's (John Black)SRF3 qualifying best at Runoffs 2017: 99.5% of GTL's (John Black)SRF3 qualifying best at Runoffs 2018: 98.4% of GTL's (Robeson Clay Russell)SRF3 qualifying best at Runoffs 2019: 98.1% of GTL's (Brian Schofield)SRF3 qualifying best at Runoffs 2020: 98.6% of GTL's (TJ Acker)SRF3 qualifying best at Runoffs 2021: 97.9% of GTL's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2022: 96.8% of GTL's (Franklin Futrelle)SRF3 qualifying best at Runoffs 2023: 95.6% of GTL's (Morgan Burkhard)SRF3 qualifying best at Runoffs 2024: 98.0% of GTL's (Denny Stripling)FB race best at Runoffs 2015: 83.6% of GTL's (J R Osborne)FB race best at Runoffs 2016: 84.5% of GTL's (Jeremy Hill)FB race best at Runoffs 2017: 83.6% of GTL's (Alex Mayer)FB race best at Runoffs 2018: 83.3% of GTL's (J R Osborne)FB race best at Runoffs 2019: 92.1% of GTL's (Pete Frost)FB qualifying best at Runoffs 2015: 84.3% of GTL's (J R Osborne)FB qualifying best at Runoffs 2016: 83.8% of GTL's (Alex Mayer)FB qualifying best at Runoffs 2017: 85.0% of GTL's (Gary Hickman)FB qualifying best at Runoffs 2018: 82.1% of GTL's (J R Osborne)FB qualifying best at Runoffs 2019: 90.1% of GTL's (Pete Frost)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
GTLFMSRF3FBsolid race · dashed qualifying · each class's best lap as a share of GTL's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventGTLFMSRF3FB
Qual best Race best Trap Qual best Race best Trap vs GTL % of GTL Qual best Race best Trap vs GTL % of GTL Qual best Race best Trap vs GTL % of GTL 
Road America Runoffs 20262026-09-282:27.443Tyler 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%)
3 rule changes (GTL: 1, SRF3: 2)1 removed · 2 othershowhide
  • GTL Remove GT3U from GCR as it is now in STU #39862removed
  • SRF3 SRF3 Spark Plugs #39899other
  • SRF3 Add HD Oil Cooler #38979other
Road America Runoffs 20252025-09-292:28.226Bobby 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%)
6 rule changes (GTL: 3, SRF3: 3)2 weight · 1 aero · 1 engine · 2 othershowhide
  • SRF3 SRF Rule Updates #38853weight
  • SRF3 Driver Safety & Comfort #37966other
  • SRF3 Update SADEV transmission specs #37992other
  • 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 20242024-10-012:30.858Peter 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%)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%)-2.715squal -3.085s98.2%qual 98.0%
26 rule changes (GTL: 16, SRF3: 10)5 cars added · 5 engine · 5 weight · 3 suspension & brakes · 3 tyres & wheels · 2 induction · 1 aero · 2 othershowhide
  • SRF3 Update SRF3 Air Filter Rule #36681other
  • SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes
  • SRF3 Hoosier Tire Decal Placement #36739tyres & wheels
  • 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
  • SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels
  • SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels
  • GTL Add GTL to GT3 choke option line. #36236induction
  • SRF3 SRF3 Alternator Pulley Update In #36095weight
  • GTL Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GTL Allow 34 mm chokes for the Datsun 510 #35661induction +50 lbs
  • 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
  • SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes
  • SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes
  • SRF3 SRF / SRF3 Rule Updates #35268weight
  • 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
  • SRF3 SRF Radiator Rule Update #34805other
Virginia International Raceway Runoffs 20232023-09-232:09.564Peter 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%)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%)-6.366squal -5.722s95.2%qual 95.6%
11 rule changes (GTL: 7, SRF3: 4)3 engine · 3 tyres & wheels · 2 weight · 1 cars added · 1 induction · 1 suspension & brakesshowhide
  • SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels
  • GTL Please classify Fields Cardinal V8 #33784cars added
  • SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels
  • SRF3 Update SRF Brake Rule #33469suspension & brakes
  • SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels
  • 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
Virginia International Raceway Runoffs 20222022-09-242:07.789Peter 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%)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%)+0.886squal -4.073s100.6%qual 96.8%
6 rule changes (GTL: 3, SRF3: 3)2 cars added · 2 suspension & brakes · 1 tyres & wheels · 1 weightshowhide
  • GTL Tail lights on all GT category race cars. #32799suspension & brakes
  • SRF3 SRF Tire Rule Update #32614tyres & wheels
  • SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes
  • GTL Request to Classify Ginetta G40 in GTL #31599cars added
  • SRF3 Three Updates to SRF Rules #31523weight
  • GTL Request car classification #31032cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:51.819Christopher 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 Linn1:49.520Franklin 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-1.857squal -2.299s98.3%qual 97.9%
14 rule changes (GTL: 8, SRF3: 6)3 engine · 3 weight · 2 tyres & wheels · 1 cars added · 1 induction · 1 suspension & brakes · 1 wording · 2 othershowhide
  • GTL Request to Update GTA Obsolete Part Numbers #30615wording
  • SRF3 SRF Wet Tires #30849tyres & wheels
  • SRF3 SADEV-SRF3 Transmission #30926other
  • SRF3 SRF Update Maintenance, Repairs and Seals #30961engine
  • 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
  • SRF3 SRF3 Alternator Pulley #30684weight
  • GTL Request for Help for Mazda 12A #29754weight +50 lbs
  • SRF3 Mandatory identification: #30223engine
  • GTL Request LP HP Fiat X1/9 & Bertone 1500 to GTL #30058cars added
  • GTL Please Add GTL Nissan 1.8L Engine MRA8DE #29805engine
  • GTL Increase 13b SIR size #29867induction
  • SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
Road America Runoffs 20202020-10-022:31.943Chris Bovis · fastest of 14 · top 5 within 6.3s2:31.601Peter Shadowen · fastest of 14 · top 5 within 7.2s131.4Peter Shadowen2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s131.9Charles Russell Turner-0.563squal -2.157s99.6%qual 98.6%
24 rule changes (GTL: 17, SRF3: 7)7 aero · 4 induction · 4 suspension & brakes · 3 cars added · 3 weight · 1 tyres & wheels · 2 othershowhide
  • GTL GT Category Wording #29193induction
  • GTL Request to change the Mazda 13b restrictor size #28518induction +175 lbs
  • 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
  • SRF3 SRF Shocks #28791suspension & brakes
  • GTL GTL Wing Rule #28754aero
  • SRF3 Update Bump Stop Rule #28712suspension & brakes
  • SRF3 SRF Bump Stop Correction #27019suspension & brakes
  • 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
  • GTL Windshield Clips #27323other
  • GTL Request Factory Five Daytona coupe classification #26308cars added
  • GTL Request to Classify the MK1 two door Jetta #27648cars added
  • SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • GTL 88-91 Honda CRX Spec Line Correction #27233weight
  • 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 20192019-10-052:06.997Peter Shadowen · fastest of 19 · top 5 within 4.0s2:07.837Bill Ball · fastest of 18 · top 5 within 4.2s131.1Peter Shadowen1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s135.7Bryce Cornet+7.979squal -11.873s106.2%qual 90.7%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-3.082squal -2.373s97.6%qual 98.1%1:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost-10.149squal -12.528s92.1%qual 90.1%
16 rule changes (GTL: 13, SRF3: 3)4 cars added · 4 weight · 2 engine · 2 suspension & brakes · 1 induction · 1 tyres & wheels · 2 othershowhide
  • GTL Fun Cup Beetle #27334weight
  • GTL GTL #26960weight
  • GTL Request CRZ wheelbase change #26896tyres & wheels
  • SRF3 SRF Dash Windscreen Kit #27028other
  • SRF3 New SRF Sectional Nose Rule Addition #26914other
  • 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
  • SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes
  • GTL Request Ride Height Clarification #26600suspension & brakes
  • GTL Request Mazda 12a Rotary SIR Increase #26081induction
  • GTL Request to Classify Mustang 2 Body in GTL #26222cars added
  • GTL Request for GTL Mini Adjustments #25754weight
  • GTL BMC thru Rover Group remove long inactive mini #25771weight
  • GTL GTX Homologation table update #26034cars added
Sonoma Raceway Runoffs 20182018-10-101:47.885Troy Ermish · fastest of 20 · top 5 within 4.5s1:49.458Troy Ermish · fastest of 19 · top 5 within 3.6s109.3Charles Leonard1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s124.1Melvin David Kemper Jr-11.549squal -10.287s89.4%qual 90.5%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-2.405squal -1.768s97.8%qual 98.4%1:28.612J R Osborne · fastest of 7 · top 5 within 3.3s1:31.189J R Osborne · fastest of 7 · top 5 within 3.7s140.5J R Osborne-18.269squal -19.273s83.3%qual 82.1%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:50.331Christopher Bovis · fastest of 26 · top 5 within 1.5s1:52.068Christopher Bovis · fastest of 20 · top 5 within 1.0s1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s-10.922squal -9.100s90.3%qual 91.8%1:49.824John Black · fastest of 101 · top 5 within 0.5s1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s-2.286squal -0.507s98.0%qual 99.5%1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s-18.366squal -16.585s83.6%qual 85.0%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:35.377Wilson Wright · fastest of 28 · top 5 within 1.2s1:35.912Kyle Disque · fastest of 28 · top 5 within 1.1s1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s-7.990squal -9.334s91.7%qual 90.2%1:34.363John Black · fastest of 41 · top 5 within 0.5s1:34.947Cliff White · fastest of 39 · top 5 within 0.3s-0.965squal -1.014s99.0%qual 98.9%1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s-14.897squal -15.491s84.5%qual 83.8%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:11.387Jim Dentici · fastest of 10 · top 5 within 2.2s2:13.564Jim Dentici · fastest of 9 · top 5 within 2.0s1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s-15.535squal -13.583s88.4%qual 89.7%2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s-3.349squal -2.830s97.5%qual 97.8%1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s-21.948squal -20.676s83.6%qual 84.3%

By track

TrackEvents Typical % of GTL Best Latest 
Road America4100.0%2 of 4 with GTL100.0%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 GTL'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.