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BoP Lab / Classes / GTL

GTL vs FB vs F5 vs EP 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-SpecvsEP×vsF5×F600FAvsFB×FCFE2FFFPFVFXGT1GT2GTL×GTXHPPP2SMSMXSRF3STLSTUT1T2T3T4Show 175 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 · FB 82.1% of GTL J R Osborne, Sonoma Raceway Runoffs 2018 qualifying · F5 91.8% of GTL Ryan Mayfield, Indianapolis Motor Speedway Runoffs 2021 qualifying · EP 93.7% of GTL Kip Van Steenburg, Daytona International Speedway Runoffs 2015 race

1:402:002:2024 rule changes between Runoffs 2018 and Runoffs 201924 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾25 rule changes between Runoffs 2020 and Runoffs 202125 ▾30 rule changes between Runoffs 2021 and Runoffs 202230 ▾20 rule changes between Runoffs 2022 and Runoffs 202320 ▾30 rule changes between Runoffs 2023 and Runoffs 202430 ▾17 rule changes between Runoffs 2024 and Runoffs 202517 ▾22 rule changes between Runoffs 2025 and Runoffs 202622 ▾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)FB race best at Runoffs 2015: 1:51.616 (J R Osborne)Off the chart: 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)Off the chart: 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)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)EP race best at Runoffs 2015: 2:05.109 (Kip Van Steenburg)EP race best at Runoffs 2016: 1:34.266 (Michael Galati)EP race best at Runoffs 2017: 1:50.396 (Matt Reynolds)EP race best at Runoffs 2018: 1:46.518 (Glen McCready)EP race best at Runoffs 2019: 2:01.631 (Jesse Prather)EP race best at Runoffs 2020: 2:29.047 (Jesse Prather)EP race best at Runoffs 2021: 1:49.928 (Jesse Prather)EP race best at Runoffs 2022: 2:30.855 (Jesse Prather)EP race best at Runoffs 2023: 2:04.050 (Greg Ira)EP race best at Runoffs 2024: 2:27.869 (Tyler Ladd)EP race best at Runoffs 2025: 2:28.756 (Tyler Ladd)EP race best at Runoffs 2026: 2:27.869 (Jon Brakke)EP qualifying best at Runoffs 2015: 2:03.794 (Kip Van Steenburg)EP qualifying best at Runoffs 2016: 1:33.847 (Michael Galati)EP qualifying best at Runoffs 2017: 1:49.597 (Matt Reynolds)EP qualifying best at Runoffs 2018: 1:45.828 (Glen McCready)EP qualifying best at Runoffs 2019: 2:00.987 (Jesse Prather)EP qualifying best at Runoffs 2020: 2:27.322 (Jesse Prather)EP qualifying best at Runoffs 2021: 1:48.181 (Jesse Prather)EP qualifying best at Runoffs 2022: 2:02.326 (Jesse Prather)EP qualifying best at Runoffs 2023: 2:03.215 (John Hainsworth)EP qualifying best at Runoffs 2024: 2:26.803 (Tyler Ladd)EP qualifying best at Runoffs 2025: 2:27.293 (Jon Brakke)EP qualifying best at Runoffs 2026: 2:29.239 (Jon Brakke)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
GTLFBF5EPsolid race · dashed qualifying · slower is lower
85%90%95%100%24 rule changes between Runoffs 2018 and Runoffs 201924 ▾37 rule changes between Runoffs 2019 and Runoffs 202037 ▾25 rule changes between Runoffs 2020 and Runoffs 202125 ▾30 rule changes between Runoffs 2021 and Runoffs 202230 ▾20 rule changes between Runoffs 2022 and Runoffs 202320 ▾30 rule changes between Runoffs 2023 and Runoffs 202430 ▾17 rule changes between Runoffs 2024 and Runoffs 202517 ▾22 rule changes between Runoffs 2025 and Runoffs 202622 ▾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)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)F5 race best at Runoffs 2015: 92.3% of GTL's (Matthew Strand)F5 race best at Runoffs 2016: 93.7% of GTL's (Steven Thompson)F5 race best at Runoffs 2017: 91.8% of GTL's (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 93.6% of GTL's (David Lapham)F5 race best at Runoffs 2019: 92.0% of GTL's (Wiley Mcmahan)F5 race best at Runoffs 2020: 93.3% of GTL's (James Weida)F5 race best at Runoffs 2021: 92.1% of GTL's (Sven de Vries)F5 race best at Runoffs 2022: 100.5% of GTL's (Sven de Vries)F5 qualifying best at Runoffs 2015: 92.7% of GTL's (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 92.8% of GTL's (Calvin Stewart)F5 qualifying best at Runoffs 2017: 93.5% of GTL's (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 94.4% of GTL's (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 92.4% of GTL's (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 92.8% of GTL's (Calvin Stewart)F5 qualifying best at Runoffs 2021: 91.8% of GTL's (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 92.1% of GTL's (James Weida)EP race best at Runoffs 2015: 93.7% of GTL's (Kip Van Steenburg)EP race best at Runoffs 2016: 98.3% of GTL's (Michael Galati)EP race best at Runoffs 2017: 98.5% of GTL's (Matt Reynolds)EP race best at Runoffs 2018: 97.3% of GTL's (Glen McCready)EP race best at Runoffs 2019: 95.1% of GTL's (Jesse Prather)EP race best at Runoffs 2020: 98.3% of GTL's (Jesse Prather)EP race best at Runoffs 2021: 98.2% of GTL's (Jesse Prather)Off the chart: EP race best at Runoffs 2022: 106.9% of GTL's (Jesse Prather)EP race best at Runoffs 2023: 94.5% of GTL's (Greg Ira)EP race best at Runoffs 2024: 98.0% of GTL's (Tyler Ladd)EP qualifying best at Runoffs 2015: 94.2% of GTL's (Kip Van Steenburg)EP qualifying best at Runoffs 2016: 98.4% of GTL's (Michael Galati)EP qualifying best at Runoffs 2017: 99.3% of GTL's (Matt Reynolds)EP qualifying best at Runoffs 2018: 98.1% of GTL's (Glen McCready)EP qualifying best at Runoffs 2019: 95.3% of GTL's (Jesse Prather)EP qualifying best at Runoffs 2020: 97.0% of GTL's (Jesse Prather)EP qualifying best at Runoffs 2021: 96.7% of GTL's (Jesse Prather)EP qualifying best at Runoffs 2022: 95.7% of GTL's (Jesse Prather)EP qualifying best at Runoffs 2023: 95.1% of GTL's (John Hainsworth)EP qualifying best at Runoffs 2024: 97.3% of GTL's (Tyler Ladd)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
GTLFBF5EPsolid 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
EventGTLFBF5EP
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 20262026-09-282:29.239Jon Brakke · fastest of 15 · top 5 within 5.2s+1.946s (+1.32%)2:27.869Jon Brakke · fastest of 15 · top 5 within 5.2s-0.887s (-0.60%)137.0Jon Brakke-3.8 mph (-2.7%)
22 rule changes (GTL: 1, EP: 21)6 weight · 5 induction · 4 engine · 1 removed · 1 suspension & brakes · 1 tyres & wheels · 3 wording · 1 othershowhide
  • EP Mini Cooper Compression Ratio #40517engine
  • EP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • EP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • EP HP Honda Civic (92-95) #40464weight -70 lbs
  • EP Honda S2000 Hardtop #40138other
  • EP Miata track width - errors and omissions #39976wording
  • EP Triumph GT6 Spec Change. #40098induction
  • GTL Remove GT3U from GCR as it is now in STU #39862removed
  • EP Request to Update E30 BMW Throttle Body Diameter Verbiage #39363induction
  • EP TR2 Notes E&O #39180weight
  • EP Balance of Power #39187weight +50 lbs
  • EP Please Lower Weight of 280Z #38871weight -160 lbs
  • EP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • EP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • EP HP Volvo 142 spec omission #38994engine
  • EP HP Mini DOHC 1.6 #38996engine
  • EP Add to Rabbit description #39019wording
  • EP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • EP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • EP HP Plymouth Arrow spec omission #38995wording
  • EP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • EP Add TB ID tolerance to general Prod rules #39009induction
Road America Runoffs 20252025-09-292:27.293Jon Brakke · fastest of 21 · top 5 within 2.1s+0.490s (+0.33%)2:28.756Tyler Ladd · fastest of 19 · top 5 within 1.9s+0.887s (+0.60%)140.8Jon Brakke+0.1 mph (+0.1%)
17 rule changes (GTL: 3, EP: 14)8 weight · 3 induction · 1 aero · 1 cars added · 1 engine · 1 wording · 2 othershowhide
  • EP BMW Z4 update #38490induction
  • EP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • EP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
  • EP Request for Classification of Chevrolet Spark #37755cars added
  • EP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • EP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • EP Interpretation of Production Rules on Mirrors #37235other
  • EP Weight Reduction for Honda S2000 #37466weight
  • EP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • EP Effective date for Jan 2025 GCR updates #37654induction
  • EP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • GTL Correct language regarding OEM Areo Devices #37137aero
  • EP Triumph GT6 Adjustments #37112weight
  • EP 1275 HP Spridget Level 2 Only #36518other
  • EP NA Miata Track Width Correction #36902wording
  • 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%)2:26.803Tyler Ladd · fastest of 16 · top 5 within 4.1s-0.519s (-0.35%)2:27.869Tyler Ladd · fastest of 16 · top 5 within 3.6s-1.178s (-0.79%)140.7Bill Miller-1.0 mph (-0.7%)-2.975squal -4.055s98.0%qual 97.3%
30 rule changes (GTL: 16, EP: 14)10 weight · 7 cars added · 7 engine · 3 induction · 1 aero · 1 wording · 1 othershowhide
  • 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
  • EP Errant entry in HP production line item #36231other
  • GTL Add GTL to GT3 choke option line. #36236induction
  • EP NIssan 300ZX Z31 to EP #35830cars added
  • EP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • EP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • GTL Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GTL Allow 34 mm chokes for the Datsun 510 #35661induction +50 lbs
  • EP GCR Correction - Redundant HP Spec Lines #35623engine
  • EP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • 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
  • EP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • EP Miata Alternate Head #35253weight -50 lbs
  • EP Triumph GT6 Adjustments #35255weight
  • EP Honda S2000 throttle body #35272induction
  • EP Correction within Triumph TR8 Spec Line #35315engine
  • EP Correction to EP 924S/944 Spec Line #35317weight
  • 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
  • EP Porsche 944/924S Rule Change Request #35002weight
  • EP Triumph GT6 Adjustments #35054weight -30 lbs
  • 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 20232023-09-232:09.564Peter 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%)2:03.215John Hainsworth · fastest of 24 · top 5 within 4.3s+0.889s (+0.73%)2:04.050Greg Ira · fastest of 22 · top 5 within 5.3s-26.805s (-17.77%)144.6Greg Ira+3.1 mph (+2.2%)-7.227squal -6.349s94.5%qual 95.1%
20 rule changes (GTL: 7, EP: 13)6 engine · 4 induction · 4 weight · 2 suspension & brakes · 1 cars added · 1 wording · 2 othershowhide
  • EP Hub Note Clean Up In EP TR8 Spec Line #34649wording
  • EP Triumph GT6 Adjustments #34662other
  • EP Triumph GT6 Adjustments: Brakes #34663suspension & brakes
  • EP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • EP 914-6 Valve Size Correction #34185engine
  • GTL Please classify Fields Cardinal V8 #33784cars added
  • EP Investigate Parity of Z3 #33343induction
  • GTL Toyota 4Y Engine Classification Request #33562engine
  • EP Revise 79-85 RX7 Brake Spec Line Allowance #33293suspension & brakes
  • EP Request alternate carburetors for EP 280z #33405engine
  • EP Fuel Injection 12a Mazda RX3 #33434engine
  • EP Mazda RX3 - Weight Reduction #33436weight -50 lbs
  • EP Request TR8 Dry Sump Allowance #33460other
  • EP Review Limited Prep Port Matching Rules #33600induction
  • EP 280ZX Classification Request #33611weight
  • 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%)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%)+0.682squal -10.100s100.5%qual 92.1%2:02.326Jesse Prather · fastest of 17 · top 5 within 3.2s+1.339s (+1.11%)2:30.855Jesse Prather · fastest of 15 · top 5 within 2.5s+29.224s (+24.03%)141.5Jesse Prather-6.0 mph (-4.1%)+9.675squal -5.463s106.9%qual 95.7%
30 rule changes (GTL: 3, F5: 6, EP: 21)8 induction · 6 engine · 5 cars added · 3 weight · 2 tyres & wheels · 1 suspension & brakes · 1 wording · 4 othershowhide
  • EP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • EP Request Rotary Injection on Dual Y manifold #32775engine
  • EP Request for Corrado Stroke & Displacement Correction #32985engine
  • F5 Intake Boots Correction #33028induction
  • GTL Tail lights on all GT category race cars. #32799suspension & brakes
  • F5 Ensure availability of ECU for Rotax engines #32695engine
  • F5 Clarify stepped exhaust header references #32743engine
  • EP Subaru BRZ Model Years #32500other
  • F5 593 carb boot availability and oil pump clarification #32527induction
  • EP EP MX-5 Global Cup Car #32218weight
  • EP Please Class BMW 128i in EP #32370cars added
  • EP Inconsistency in Body Work Descriptions #32396other
  • EP Mazda RX8 with 13b Rotary #32170induction
  • EP Request Idle control valve clarification #32178engine
  • EP EP Adjustments #31858induction
  • EP 1999 3.8L Ford Mustang to EP? #31635weight
  • EP Improved Touring Tires #32064tyres & wheels
  • F5 E&O class name #32194other
  • GTL Request to Classify Ginetta G40 in GTL #31599cars added
  • EP Throttle Body and Idle Air #31800induction
  • EP Porsche 968 Engine Questions #31831engine
  • EP Request weight reduction for 1979-1985 Mazda RX-7 #31833weight
  • EP Porsche 968 Engine Questions #31478induction
  • EP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • EP BMW Z3 2.5L Spec Line #31724induction
  • F5 Data Box Mounting Plate #31638other
  • EP 944S2 Restrictor #31396induction
  • EP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • EP E&O; MR2 Track #31120wording
  • 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 Linn1:42.619Ryan 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-8.812squal -9.200s92.1%qual 91.8%1:48.181Jesse Prather · fastest of 31 · top 5 within 3.2s-1.416s (-1.29%)1:49.928Jesse Prather · fastest of 27 · top 5 within 0.9s-0.468s (-0.42%)143.4Jon Brakke-2.024squal -3.638s98.2%qual 96.7%
25 rule changes (GTL: 8, F5: 3, EP: 14)7 weight · 4 cars added · 4 engine · 2 induction · 2 suspension & brakes · 2 tyres & wheels · 3 wording · 1 othershowhide
  • EP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • EP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • F5 Clarify allowable assisted shifting systems #30871wording
  • F5 Request to correct terminology #30976tyres & wheels
  • GTL Request to Update GTA Obsolete Part Numbers #30615wording
  • EP Lotus/Caterham 7 America Request #30392engine
  • EP Reclassify Daimler SP 250 #30721cars added
  • 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
  • EP Clarify Application of Percentage Based Weight Penalties #30669weight
  • F5 Request to Allow Rotax 593 HO Engine #30712engine
  • EP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • EP Fiat X1/9 brake rotors #30423suspension & brakes
  • EP NC MX-5 year range correction E&O #30503wording
  • EP Please Classify Mazda3 in FP #30165cars added
  • GTL Request for Help for Mazda 12A #29754weight +50 lbs
  • GTL Request LP HP Fiat X1/9 & Bertone 1500 to GTL #30058cars added
  • EP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • GTL Please Add GTL Nissan 1.8L Engine MRA8DE #29805engine
  • GTL Increase 13b SIR size #29867induction
  • EP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • EP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • EP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • EP EP TR8 Adjustment #29512weight -100 lbs
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 Shadowen2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s2:21.391James Weida · fastest of 14 · top 5 within 1.5s143.2Aaron Ellis-10.210squal -10.989s93.3%qual 92.8%2:27.322Jesse Prather · fastest of 20 · top 5 within 2.5s2:29.047Jesse Prather · fastest of 20 · top 5 within 2.8s141.7Jesse Prather-2.554squal -4.621s98.3%qual 97.0%
37 rule changes (GTL: 17, F5: 6, EP: 14)10 induction · 7 aero · 6 engine · 5 cars added · 2 weight · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 4 othershowhide
  • EP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • F5 Request to Update Suzuki Engine Years for F500 #29453engine
  • GTL GT Category Wording #29193induction
  • EP EP BMW Z3 Rule Clarification #28998engine
  • GTL Request to change the Mazda 13b restrictor size #28518induction +175 lbs
  • EP Request to Classify Porsche 911 2.0L #28456cars added
  • 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
  • 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
  • EP BMW Cylinder Head Casting and Part Numbers #28708engine
  • GTL Stall Test #28709induction
  • EP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • EP Error in Mini Cooper Spec Line #28713wording
  • GTL GTL Wing Rule #28754aero
  • EP Caterham 7 Spec Line #28498engine
  • EP Request to Review Horsepower Parity #27662induction
  • EP E36 (92-95) Brakes Errors and Omissions #28058suspension & brakes
  • EP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • EP Add Throttle Body Size these EP BMW Spec Lines #28422induction
  • 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
  • EP Request for Help for Datsun 1200 #27934induction
  • GTL Windshield Clips #27323other
  • EP Request to List Mazda Miata Throttle Body Size #27907induction
  • F5 Change 600cc restrictor size #27883induction
  • GTL Request Factory Five Daytona coupe classification #26308cars added
  • GTL Request to Classify the MK1 two door Jetta #27648cars added
  • EP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
  • GTL 88-91 Honda CRX Spec Line Correction #27233weight
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 Shadowen1:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost-10.149squal -12.528s92.1%qual 90.1%1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s142.8Eric McRee-10.265squal -9.636s92.0%qual 92.4%2:00.987Jesse Prather · fastest of 29 · top 5 within 2.2s2:01.631Jesse Prather · fastest of 24 · top 5 within 1.4s147.5Kip Van Steenburg-6.206squal -6.010s95.1%qual 95.3%
24 rule changes (GTL: 13, F5: 1, EP: 10)6 weight · 5 cars added · 3 engine · 3 induction · 2 suspension & brakes · 2 tyres & wheels · 1 wording · 2 othershowhide
  • EP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • EP Request to classify the GMX5 2019 #27263cars added
  • EP level one susp. component rule #27270suspension & brakes
  • EP Clarification of Carb Rules - Prep 1 #27300induction
  • EP Clarification of Carb Rules - Prep 2 #27301induction
  • F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs
  • GTL Fun Cup Beetle #27334weight
  • EP Request Miata Eligibility - 2003 #27121other
  • GTL GTL #26960weight
  • GTL Request CRZ wheelbase change #26896tyres & wheels
  • EP Allow Firewall Modification for Fitment of 13B into RX8 #26726engine
  • 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
  • EP Rollcenter Correction Clarification #25873tyres & wheels
  • EP Hardtops #26476wording
  • GTL Request Ride Height Clarification #26600suspension & brakes
  • EP Request for Competition Adjustment for 2nd Generation RX7 #25935weight -50 lbs
  • 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 Leonard1:28.612J 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%1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s1:42.491David Lapham · fastest of 5 · top 5 within 9.5s113.3David Lapham-6.967squal -6.078s93.6%qual 94.4%1:45.828Glen McCready · fastest of 18 · top 5 within 4.3s1:46.518Glen McCready · fastest of 16 · top 5 within 2.8s106.5Aaron Downey-2.940squal -2.057s97.3%qual 98.1%
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 1.0s1:33.746Gary 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%1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s-9.208squal -7.195s91.8%qual 93.5%1:49.597Matt Reynolds · fastest of 44 · top 5 within 1.2s1:50.396Matt Reynolds · fastest of 45 · top 5 within 0.5s-1.672squal -0.734s98.5%qual 99.3%
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 1.1s1:19.886Alex 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%1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s-6.059squal -6.849s93.7%qual 92.8%1:33.847Michael Galati · fastest of 25 · top 5 within 0.8s1:34.266Michael Galati · fastest of 23 · top 5 within 1.3s-1.646squal -1.530s98.3%qual 98.4%
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 2.0s1:50.711J 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%2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s-10.266squal -9.563s92.3%qual 92.7%2:03.794Kip Van Steenburg · fastest of 29 · top 5 within 3.2s2:05.109Kip Van Steenburg · fastest of 28 · top 5 within 3.3s-8.455squal -7.593s93.7%qual 94.2%

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.