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BoP Lab / Classes / F5

F5 vs FB vs SM vs T1 pace at every track

Lap times across years say as much about the weather as the class. % of F5 is each class's best lap as a share of F5'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-SpecEPF5×FAvsFB×FCFE2FFFPFVFXGT1GT2GTXHPPP2vsSM×SMXSRF3STLSTUvsT1×T2T3T4Show 49 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: F5 100.0% of F5 Matthew Strand, Daytona International Speedway Runoffs 2015 race · FB 87.0% of F5 J R Osborne, Sonoma Raceway Runoffs 2018 qualifying · SM 98.1% of F5 Travis Wiley, Virginia International Raceway Runoffs 2022 race · T1 93.2% of F5 Andrew Aquilante, Daytona International Speedway Runoffs 2015 qualifying

1:201:402:002:202:4024 rule changes between Runoffs 2018 and Runoffs 201924 ▾21 rule changes between Runoffs 2019 and Runoffs 202021 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾18 rule changes between Runoffs 2021 and Runoffs 202218 ▾20 rule changes between Runoffs 2022 and Runoffs 202320 ▾17 rule changes between Runoffs 2023 and Runoffs 202417 ▾23 rule changes between Runoffs 2024 and Runoffs 202523 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾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)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)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)T1 race best at Runoffs 2015: 1:55.494 (Andrew Aquilante)T1 race best at Runoffs 2016: 1:29.309 (Ross Murray)T1 race best at Runoffs 2017: 1:42.871 (Andrew Aquilante)T1 race best at Runoffs 2018: 1:41.125 (Kristofer Olson)T1 race best at Runoffs 2019: 2:14.413 (Andrew Aquilante)T1 race best at Runoffs 2020: 2:18.701 (Mark Boden)T1 race best at Runoffs 2021: 1:43.752 (Mark Boden)T1 race best at Runoffs 2022: 2:16.067 (Andrew Aquilante)T1 race best at Runoffs 2023: 1:55.488 (Andrew Aquilante)T1 race best at Runoffs 2024: 2:16.131 (Andrew Aquilante)T1 race best at Runoffs 2025: 2:21.612 (Drew Delmonico)T1 qualifying best at Runoffs 2015: 1:53.562 (Andrew Aquilante)T1 qualifying best at Runoffs 2016: 1:28.656 (Ross Murray)T1 qualifying best at Runoffs 2017: 1:41.793 (Andrew Aquilante)T1 qualifying best at Runoffs 2018: 1:39.970 (Kristofer Olson)T1 qualifying best at Runoffs 2019: 1:54.771 (Andrew Aquilante)T1 qualifying best at Runoffs 2020: 2:17.646 (Andrew Aquilante)T1 qualifying best at Runoffs 2021: 1:42.292 (Andrew Aquilante)T1 qualifying best at Runoffs 2022: 1:54.890 (Andrew Aquilante)T1 qualifying best at Runoffs 2023: 1:54.520 (Andrew Aquilante)T1 qualifying best at Runoffs 2024: 2:16.578 (Andrew Aquilante)T1 qualifying best at Runoffs 2025: 2:20.677 (James Candelaria)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
F5FBSMT1solid race · dashed qualifying · slower is lower
90%100%110%24 rule changes between Runoffs 2018 and Runoffs 201924 ▾21 rule changes between Runoffs 2019 and Runoffs 202021 ▾22 rule changes between Runoffs 2020 and Runoffs 202122 ▾18 rule changes between Runoffs 2021 and Runoffs 202218 ▾20 rule changes between Runoffs 2022 and Runoffs 202320 ▾17 rule changes between Runoffs 2023 and Runoffs 202417 ▾23 rule changes between Runoffs 2024 and Runoffs 202523 ▾14 rule changes between Runoffs 2025 and Runoffs 202614 ▾F5 race best at Runoffs 2015: 100.0% of F5's (Matthew Strand)F5 race best at Runoffs 2016: 100.0% of F5's (Steven Thompson)F5 race best at Runoffs 2017: 100.0% of F5's (Wiley Clinton McMahan)F5 race best at Runoffs 2018: 100.0% of F5's (David Lapham)F5 race best at Runoffs 2019: 100.0% of F5's (Wiley Mcmahan)F5 race best at Runoffs 2020: 100.0% of F5's (James Weida)F5 race best at Runoffs 2021: 100.0% of F5's (Sven de Vries)F5 race best at Runoffs 2022: 100.0% of F5's (Sven de Vries)F5 qualifying best at Runoffs 2015: 100.0% of F5's (W. Clint McMahan)F5 qualifying best at Runoffs 2016: 100.0% of F5's (Calvin Stewart)F5 qualifying best at Runoffs 2017: 100.0% of F5's (Wiley Clinton McMahan)F5 qualifying best at Runoffs 2018: 100.0% of F5's (Jeff Jorgenson)F5 qualifying best at Runoffs 2019: 100.0% of F5's (Wiley Mcmahan)F5 qualifying best at Runoffs 2020: 100.0% of F5's (Calvin Stewart)F5 qualifying best at Runoffs 2021: 100.0% of F5's (Ryan Mayfield)F5 qualifying best at Runoffs 2022: 100.0% of F5's (James Weida)FB race best at Runoffs 2015: 90.5% of F5's (J R Osborne)FB race best at Runoffs 2016: 90.2% of F5's (Jeremy Hill)FB race best at Runoffs 2017: 91.1% of F5's (Alex Mayer)FB race best at Runoffs 2018: 89.0% of F5's (J R Osborne)FB race best at Runoffs 2019: 100.1% of F5's (Pete Frost)FB qualifying best at Runoffs 2015: 90.9% of F5's (J R Osborne)FB qualifying best at Runoffs 2016: 90.2% of F5's (Alex Mayer)FB qualifying best at Runoffs 2017: 90.9% of F5's (Gary Hickman)Off the chart: FB qualifying best at Runoffs 2018: 87.0% of F5's (J R Osborne)FB qualifying best at Runoffs 2019: 97.5% of F5's (Pete Frost)SM race best at Runoffs 2015: 116.8% of F5's (Todd Lamb)SM race best at Runoffs 2016: 112.1% of F5's (Michael Carter)SM race best at Runoffs 2017: 115.8% of F5's (Michael Gagliardo)SM race best at Runoffs 2018: 112.5% of F5's (Michael Carter)SM race best at Runoffs 2019: 116.1% of F5's (Elivan Goulart)SM race best at Runoffs 2020: 115.8% of F5's (Preston Pardus)SM race best at Runoffs 2021: 115.2% of F5's (Brian Henderson)SM race best at Runoffs 2022: 98.1% of F5's (Travis Wiley)SM qualifying best at Runoffs 2015: 113.8% of F5's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 113.5% of F5's (Justin Hille)SM qualifying best at Runoffs 2017: 114.7% of F5's (Chris Haldeman)SM qualifying best at Runoffs 2018: 112.3% of F5's (Ken Sutherland)SM qualifying best at Runoffs 2019: 114.6% of F5's (Todd Buras)SM qualifying best at Runoffs 2020: 115.1% of F5's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 114.7% of F5's (Brian Henderson)SM qualifying best at Runoffs 2022: 114.4% of F5's (Danny Steyn)T1 race best at Runoffs 2015: 93.7% of F5's (Andrew Aquilante)T1 race best at Runoffs 2016: 99.4% of F5's (Ross Murray)T1 race best at Runoffs 2017: 100.0% of F5's (Andrew Aquilante)T1 race best at Runoffs 2018: 98.7% of F5's (Kristofer Olson)T1 race best at Runoffs 2019: 114.3% of F5's (Andrew Aquilante)T1 race best at Runoffs 2020: 98.1% of F5's (Mark Boden)T1 race best at Runoffs 2021: 100.6% of F5's (Mark Boden)T1 race best at Runoffs 2022: 95.9% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2015: 93.2% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2016: 100.1% of F5's (Ross Murray)T1 qualifying best at Runoffs 2017: 98.7% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2018: 98.2% of F5's (Kristofer Olson)T1 qualifying best at Runoffs 2019: 97.8% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2020: 97.7% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2021: 99.7% of F5's (Andrew Aquilante)T1 qualifying best at Runoffs 2022: 97.6% of F5's (Andrew Aquilante)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
F5FBSMT1solid race · dashed qualifying · each class's best lap as a share of F5's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventF5FBSMT1
Qual best Race best Trap Qual best Race best Trap vs F5 % of F5 Qual best Race best Trap vs F5 % of F5 Qual best Race best Trap vs F5 % of F5 
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%)
14 rule changes (SM: 2, T1: 12)3 induction · 3 weight · 2 tyres & wheels · 1 removed · 1 wording · 4 othershowhide
  • SM Rear Toe Link #40271other
  • T1 Tire Equality #40342tyres & wheels
  • T1 Trunk Lid Wording #40177tyres & wheels
  • T1 Clarification on Request #39716 T1 (Spec Line #1139) #39924induction
  • T1 Mistake in Line 1430 #39958other
  • SM Part Number Change Request #39914wording
  • T1 Spec line #1139 Restrictor Change Request #39922induction
  • T1 Replace OEM Heat Exchanger (Intercooler) With Aftermarket #39542other
  • T1 LS1 into Corvette C6 Spec Line Request #39716weight
  • T1 additional T1 adjustment #39520induction
  • T1 Keep S2000 Classification #39344other
  • T1 Correcting and updating T1 GT4 spec lines #39394weight
  • T1 BOP adjustments to non GT4 T1 cars #39406weight +100 lbs
  • T1 Remove T1 Spec Line #39407removed
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%)2:20.677James Candelaria · fastest of 5 · top 5 within 5.9s+4.099s (+3.00%)2:21.612Drew Delmonico · fastest of 5 · top 5 within 11.8s+5.481s (+4.03%)163.6Drew Delmonico+5.7 mph (+3.6%)
23 rule changes (SM: 4, T1: 19)7 weight · 4 cars added · 4 tyres & wheels · 3 engine · 1 induction · 1 wording · 3 othershowhide
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • T1 Acceptance of Porsche 981 GT4 Clubsport into T1 #36664cars added
  • T1 Request to Restore T1 Honda S2000 to Proper Weights #37644weight -50 lbs
  • T1 DCT Transmission in E46 #37964other
  • T1 Reduce E92 M3 Minimum Weight to 3050 #38092weight
  • T1 Finalize Spec Line for T1 Darkhorse #38106weight
  • T1 Cadillac CT4-V Blackwing #38003cars added
  • T1 Correct and make new T1 BOP adjustments. #37737weight +75 lbs
  • T1 T1 Parity Compared to GT4 #37170weight +125 lbs
  • T1 Clarification of Request Approval #37273 #37399engine
  • T1 C8 Corvette Facts #37400weight -100 lbs
  • T1 Camaro Gen 5 Competitive Disadvantage #37440induction
  • T1 Tire Changes in the Rules for GT4 #37497tyres & wheels
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • T1 Changes to T1 Tires for GT4 and Other Cars #35383tyres & wheels
  • T1 G82 M4 GT4 inclusion in T1 #35864cars added
  • T1 Alt. Clutch Allowance #36606engine
  • T1 BOP Changes Need Updates #36667weight -150 lbs
  • T1 Request Ford Performance Darkhorse R in T1 #37136cars added
  • T1 Car Mods for T1 Corvette under line item 1150 #37173tyres & wheels
  • T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine #37273engine
Road America Runoffs 20242024-10-012:41.106Ethan 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%)2:16.578Andrew Aquilante · fastest of 8 · top 5 within 4.8s-1.068s (-0.78%)2:16.131Andrew Aquilante · fastest of 7 · top 5 within 4.0s-2.570s (-1.85%)157.9Andrew Aquilante-0.8 mph (-0.5%)
17 rule changes (SM: 4, T1: 13)6 cars added · 2 engine · 2 induction · 2 weight · 1 suspension & brakes · 1 wording · 3 othershowhide
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • T1 Please Expedite classing the C63 Mercedes #35987cars added
  • T1 Honda S2000 #35582cars added
  • T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023 #35411cars added
  • T1 C8 Corvette T1 Restrictor Plate Request #35213induction
  • T1 The Cars Have Expired #35379induction
  • T1 GT4 batch adjustment in T1 #35162weight -85 lbs
  • T1 Remove T1 spec lines #35192other
  • T1 New T1 add spec line for C5 corvette LS2 engines (Copy from C6) #33764engine
  • T1 C7 Corvette Rule Change Request #34897cars added
  • T1 Camaro Gen 5 Weight Reduction Due to Competitive Disadvantage #35092weight -75 lbs
  • T1 Addendum to Letter #35022: Drivetrain Rule #35105other
  • T1 2004 - 2006 Pontiac GTO Re-Integration Back Into T1 #34403cars added
  • T1 Request to Classify Porsche 997-1 GT3 Cup #34561cars added
Virginia International Raceway Runoffs 20232023-09-232:14.986Danny 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%)1:54.520Andrew Aquilante · fastest of 12 · top 5 within 3.7s-0.370s (-0.32%)1:55.488Andrew Aquilante · fastest of 12 · top 5 within 2.7s-20.579s (-15.12%)159.2James Candelaria+1.6 mph (+1.0%)
20 rule changes (SM: 1, T1: 19)4 weight · 3 cars added · 2 engine · 2 induction · 2 tyres & wheels · 1 aero · 1 removed · 2 wording · 3 othershowhide
  • T1 Why no Camaro? #34421cars added
  • T1 Request to Remove Expiration from T1 spec lines #1350 & #1370 #34470other
  • T1 Remove #34475other
  • T1 Error in T1 GT4 numbering scheme- #34578wording
  • T1 C5 Approved Aero That Was Mistakenly Deleted #34374aero
  • T1 Viper Cleanup #34107induction
  • T1 Viper 8300 OEM FPR Size #34268induction
  • T1 Ford Mustang S197 (05-14) Clarification #34450wording
  • T1 Gen 5 Camaro Engine #33875engine
  • T1 Inquiry to letter #33682 #34071engine
  • T1 Request to reinstate T1 S197 Mustang #34048cars added
  • T1 T1 GT4 adjustments #33786other
  • T1 Touring 1 Tire Sizes #34191tyres & wheels
  • T1 Clarification for Camaro Gen5 2010-2015 #33739cars added
  • T1 Sequential Gearbox Limitations in T1 #33691weight
  • T1 T1 GT4 adjustments #33786weight
  • T1 Sunset of pre 2023 Touring 1 Rules. #33916removed
  • T1 Corrections to T1 Spec Lines #33678tyres & wheels
  • SM BOP for NB1 and NB2 #32309weight
  • T1 GT4 section to Current T1 Rules. #33632weight
Virginia International Raceway Runoffs 20222022-09-241:57.689James 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%)2:14.664Danny 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%)-2.755squal +16.975s98.1%qual 114.4%1:54.890Andrew Aquilante · fastest of 10 · top 5 within 3.2s+0.119s (+0.10%)2:16.067Andrew Aquilante · fastest of 8 · top 5 within 15.9s+1.654s (+1.23%)157.5Mark Boden+1.3 mph (+0.8%)-5.795squal -2.799s95.9%qual 97.6%
18 rule changes (F5: 6, SM: 1, T1: 11)5 weight · 3 induction · 2 cars added · 2 engine · 2 suspension & brakes · 1 wording · 3 othershowhide
  • F5 Intake Boots Correction #33028induction
  • F5 Ensure availability of ECU for Rotax engines #32695engine
  • T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs #32824weight -25 lbs
  • F5 Clarify stepped exhaust header references #32743engine
  • F5 593 carb boot availability and oil pump clarification #32527induction
  • T1 Fix FP350S limited prep and Shelby 350 full prep issues #31680induction
  • T1 Request to Classify AMG GT4 #32610cars added
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • T1 Viper/Z06 Parity #31942weight -50 lbs
  • T1 Discrepancy in T1 allowances #32293other
  • T1 T1 RX7 classification #32352cars added
  • F5 E&O class name #32194other
  • T1 Weight reduction E&O #30791weight -25 lbs
  • T1 Performance Adjustment Request for Camaro #31521weight -50 lbs
  • T1 Remove 33m Brake rotor thickness rule #31954suspension & brakes
  • F5 Data Box Mounting Plate #31638other
  • T1 Turbo Miata Help #31315weight +200 lbs
  • T1 Fix the T1 Corvette heading #31528wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:42.619Ryan 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 Weida1:57.695Brian 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+15.697squal +15.076s115.2%qual 114.7%1:42.292Andrew Aquilante · fastest of 22 · top 5 within 1.3s+0.499s (+0.49%)1:43.752Mark Boden · fastest of 22 · top 5 within 1.0s+0.881s (+0.86%)159.2Mark Boden+0.612squal -0.327s100.6%qual 99.7%
22 rule changes (F5: 3, SM: 1, T1: 18)4 cars added · 4 engine · 3 weight · 1 aero · 1 induction · 1 suspension & brakes · 1 tyres & wheels · 2 wording · 5 othershowhide
  • F5 Clarify allowable assisted shifting systems #30871wording
  • F5 Request to correct terminology #30976tyres & wheels
  • T1 T1 E46 BOP E&O for Letter # 29970 #30934weight +100 lbs
  • T1 Request BoP for the Viper in 1 LP #29968other
  • T1 LS6 Alternative Head Question #30074engine
  • F5 Request to Allow Rotax 593 HO Engine #30712engine
  • T1 T1-LP - Add Performance Pack, Bullet, Mach 1 to 18+ Mustang #29849induction
  • T1 Request BoP for the Viper in 1 LP #29968other
  • T1 Request to classify C7 and 13Viper in T1 LP #29969cars added
  • T1 Request LP Z06 steel chassis #30589other
  • T1 Request For Reduction in Weight/Penalties for Camaro #30443weight
  • T1 Fix dry sump Contradictions in T1-LP vs T2 #30596suspension & brakes
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • T1 T1 LP Aero adjustments #30196aero
  • T1 Request to Clarify Miller Mustang Classification #28728engine
  • T1 BMW E46 Carbon Dash #29806engine
  • T1 Request to Update T1 Mustang Spec Line #30001other
  • T1 Dodge Viper 8400 OEM??? #30174cars added
  • T1 Class BMW M2CS Club Sport #30195cars added
  • T1 997.1 GT3 Cup #30229cars added
  • T1 Correct T1 Limited Prep Years #29708wording
  • T1 Changes to Corvette C8 #29898weight -100 lbs
Road America Runoffs 20202020-10-022:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s2:21.391James Weida · fastest of 14 · top 5 within 1.5s143.2Aaron Ellis2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill+22.357squal +21.255s115.8%qual 115.1%2:17.646Andrew Aquilante · fastest of 15 · top 5 within 3.7s2:18.701Mark Boden · fastest of 14 · top 5 within 3.0s158.8James Candelaria-2.690squal -3.308s98.1%qual 97.7%
21 rule changes (F5: 6, SM: 2, T1: 13)4 engine · 4 suspension & brakes · 3 aero · 2 induction · 2 weight · 1 cars added · 1 tyres & wheels · 1 wording · 3 othershowhide
  • F5 Request to Update Suzuki Engine Years for F500 #29453engine
  • SM Radiator E&O Clarifications #29294engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T1 Touring Gurney flap wicker clarification #29013aero
  • 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
  • T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • T1 Additional Clarification on 996 Cup in T1 From Letter #28040 #28060wording
  • T1 Request SPEC Corvette Rear Spolier #28182aero
  • T1 T1 Rear Brake Rotor Size Exemption for Gen 5 Camaro #28402suspension & brakes
  • T1 Request 996 GT3 Trunk for Wing Allowance. #28153aero
  • T1 All Touring, Change DOT Tire Language 9.1.9.1, 9.3.45 #28452tyres & wheels
  • T1 Request for E46 wagon with S54 engine in T1 #27427engine
  • T1 Request to include Subaru WRX/STI 02-18 in T1 #24916induction
  • T1 Request Ford Mustang FP350S T1-LP weight and restrictor change #26662weight +100 lbs
  • T1 Request to classify Ford Coyote 3rd Gen OEM #27145cars added
  • T1 Request alternate dashboard #27276weight
  • T1 Request for Allowance of Coil Springs on Limited Prep C6 Corvette #27713suspension & brakes
  • F5 Change 600cc restrictor size #27883induction
Virginia International Raceway Runoffs 20192019-10-051:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s142.8Eric McRee1:54.469Pete Frost · only car1:57.688Pete Frost · only car145.9Pete Frost+0.116squal -2.892s100.1%qual 97.5%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+18.887squal +17.191s116.1%qual 114.6%1:54.771Andrew Aquilante · fastest of 19 · top 5 within 3.1s2:14.413Andrew Aquilante · fastest of 15 · top 5 within 4.8s156.2Mark Boden+16.841squal -2.590s114.3%qual 97.8%
24 rule changes (F5: 1, SM: 4, T1: 19)8 weight · 6 cars added · 2 suspension & brakes · 2 tyres & wheels · 1 aero · 1 engine · 1 induction · 2 wording · 1 othershowhide
  • F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs
  • T1 T1 LP 2016 Camaro and Later #27198weight -100 lbs
  • T1 Request to return Ford Mustang Challenge Car to T1 #26751cars added
  • T1 Correct years in T1 FP Corvette spec #27023wording
  • T1 Request BoP Baten - T1 Camaro - Follow up to Letter # 26145 #26900induction
  • T1 Clarify DOT tires touring #26556tyres & wheels
  • T1 Request to Classify EcoBoost Mustang #25841cars added
  • T1 Request Corvette aerodynamic aids #26265aero
  • T1 Audi TTRS VTS Documentation Revision #26578other
  • T1 Request Ride Height Clarification #26599suspension & brakes
  • T1 Opposes Unfair weight and throttle restrictor #26719weight -300 lbs
  • T1 Request to classify the Porsche 928GTS/S4 in Touring 1 #26315cars added
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T1 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • 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
  • T1 Class 2015+ Mustang GT350(R) #21466weight
  • T1 Request to Classify Ford FP350S in T1-LP #25341cars added
  • T1 Amendment to Request #25555 #25556suspension & brakes
  • T1 Request to balance 996 v 997 T1 weight #25658weight
  • T1 Request to Add PDK Transmission to 997 Porsche Spec Line #25668cars added
  • T1 T1 World Challenge/Grand AM Spec Cars #25687weight
  • T1 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
Sonoma Raceway Runoffs 20182018-10-101:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s1:42.491David Lapham · fastest of 5 · top 5 within 9.5s113.3David Lapham1:28.612J 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-11.302squal -13.195s89.0%qual 87.0%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+12.787squal +12.548s112.5%qual 112.3%1:39.970Kristofer Olson · fastest of 16 · top 5 within 3.8s1:41.125Kristofer Olson · fastest of 15 · top 5 within 3.0s108.6Brad McCall-1.366squal -1.837s98.7%qual 98.2%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s-9.158squal -9.390s91.1%qual 90.9%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+16.240squal +15.170s115.8%qual 114.7%1:41.793Andrew Aquilante · fastest of 22 · top 5 within 2.9s1:42.871Andrew Aquilante · fastest of 21 · top 5 within 2.9s+0.011squal -1.343s100.0%qual 98.7%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s-8.838squal -8.642s90.2%qual 90.2%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+10.911squal +11.986s112.1%qual 113.5%1:28.656Ross Murray · fastest of 17 · top 5 within 1.4s1:29.309Ross Murray · fastest of 15 · top 5 within 1.1s-0.544squal +0.128s99.4%qual 100.1%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s-11.682squal -11.113s90.5%qual 90.9%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+20.769squal +16.837s116.8%qual 113.8%1:53.562Andrew Aquilante · fastest of 12 · top 5 within 2.5s1:55.494Andrew Aquilante · fastest of 12 · top 5 within 2.1s-7.804squal -8.262s93.7%qual 93.2%

By track

TrackEvents Typical % of F5 Best Latest 
Road America4100.0%1 of 4 with F5100.0%Runoffs 2020100.0%Runoffs 2020
Virginia International Raceway3100.0%2 of 3 with F5100.0%Runoffs 2019100.0%Runoffs 2022
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 F5'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.