BoP Lab / Classes / FE

FE vs F5 vs T1 pace at every track

Lap times across years say as much about the weather as the class. % of FE is each class's best lap as a share of FE's on the same day, so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.

Class · click a class to switch, + to compare alongside (up to 4)

AS +B-Spec +EP +vsF5 ×FA +FC +FE×FE2 +FF +FP +FV +FX +GT1 +GT2 +GTX +HP +P +P2 +SM +SMX +SRF3 +STL +STU +vsT1 ×T2 +T3 +T4 +Show 49 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against

Tracks · untick to narrow Auto Club Speedway Barber Motorsports Park Blackhawk Farms Raceway Buttonwillow Raceway Park Circuit of St. Louis (formerly Gateway Motorsports Circuit of the Americas Daytona International Speedway Grattan Raceway Hallett Motor Racing Circuit Homestead-Miami Speedway Indianapolis Motor Speedway Laguna Seca Michelin Raceway Road Atlanta Mid-Ohio Sports Car Course New Jersey Motorsports Park NOLA Motorsports Park Pacific Raceways Pittsburgh International Race Complex Portland International Raceway Pueblo Motorsports Park Road America Sebring International Raceway Sonoma Raceway Summit Point Raceway Thunderhill Raceway Park Virginia International Raceway Watkins Glen International Willow Springs Raceway World Wide Technology Raceway

Closest to the field: FE 100.0% of FE Scott Rettich, Daytona International Speedway Runoffs 2015 race · F5 99.2% of FE Steven Thompson, Mid-Ohio Sports Car Course Runoffs 2016 race · T1 96.4% of FE Andrew Aquilante, Daytona International Speedway Runoffs 2015 qualifying

% of FELap times

FEF5T1solid race · dashed qualifying · slower is lower

FEF5T1solid race · dashed qualifying · each class's best lap as a share of FE's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	FE			F5					T1
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs FE	% of FE	Qual best	Race best	Trap	vs FE	% of FE
	Road America Runoffs 20252025-09-29									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%)
21 rule changes (FE: 2, T1: 19)8 weight · 4 cars added · 3 engine · 3 tyres & wheels · 1 induction · 1 suspension & brakes · 1 othershowhide 2025-09-01 FE FE & FE2 Rule Updates #38901weight 2025-05-01 T1 Acceptance of Porsche 981 GT4 Clubsport into T1 #36664cars added 2025-05-01 T1 Request to Restore T1 Honda S2000 to Proper Weights #37644weight -50 lbs 2025-05-01 T1 DCT Transmission in E46 #37964other 2025-05-01 T1 Reduce E92 M3 Minimum Weight to 3050 #38092weight 2025-05-01 T1 Finalize Spec Line for T1 Darkhorse #38106weight 2025-04-01 T1 Cadillac CT4-V Blackwing #38003cars added 2025-03-01 T1 Correct and make new T1 BOP adjustments. #37737weight +75 lbs 2025-02-01 T1 T1 Parity Compared to GT4 #37170weight +125 lbs 2025-02-01 T1 Clarification of Request Approval #37273 #37399engine 2025-02-01 T1 C8 Corvette Facts #37400weight -100 lbs 2025-02-01 T1 Camaro Gen 5 Competitive Disadvantage #37440induction 2025-02-01 T1 Tire Changes in the Rules for GT4 #37497tyres & wheels 2024-12-01 FE Brake Line to A-Arm Covers #37110suspension & brakes 2024-12-01 T1 Changes to T1 Tires for GT4 and Other Cars #35383tyres & wheels 2024-12-01 T1 G82 M4 GT4 inclusion in T1 #35864cars added 2024-12-01 T1 Alt. Clutch Allowance #36606engine 2024-12-01 T1 BOP Changes Need Updates #36667weight -150 lbs 2024-12-01 T1 Request Ford Performance Darkhorse R in T1 #37136cars added 2024-12-01 T1 Car Mods for T1 Corvette under line item 1150 #37173tyres & wheels 2024-12-01 T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine #37273engine
	Road America Runoffs 20242024-10-01									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%)
18 rule changes (FE: 5, T1: 13)6 cars added · 2 induction · 2 tyres & wheels · 2 weight · 1 engine · 1 wording · 4 othershowhide 2024-09-01 FE Protest Fee Clarification #36540wording 2024-09-01 FE Update on Letter 36620 with new Hoosier Contingency Decal Info #36625tyres & wheels 2024-08-01 FE Hoosier Tire Decal Placement #36435tyres & wheels 2024-05-01 T1 Please Expedite classing the C63 Mercedes #35987cars added 2024-04-01 T1 Honda S2000 #35582cars added 2024-03-01 T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023 #35411cars added 2024-02-01 T1 C8 Corvette T1 Restrictor Plate Request #35213induction 2024-02-01 T1 The Cars Have Expired #35379induction 2024-01-01 FE Update FE Rain Light Rule #34707other 2024-01-01 FE FE/FE2 rule update #35269other 2024-01-01 T1 GT4 batch adjustment in T1 #35162weight -85 lbs 2024-01-01 T1 Remove T1 spec lines #35192other 2023-12-01 T1 New T1 add spec line for C5 corvette LS2 engines (Copy from C6) #33764engine 2023-12-01 T1 C7 Corvette Rule Change Request #34897cars added 2023-12-01 T1 Camaro Gen 5 Weight Reduction Due to Competitive Disadvantage #35092weight -75 lbs 2023-12-01 T1 Addendum to Letter #35022: Drivetrain Rule #35105other 2023-12-01 T1 2004 - 2006 Pontiac GTO Re-Integration Back Into T1 #34403cars added 2023-12-01 T1 Request to Classify Porsche 997-1 GT3 Cup #34561cars added
	Virginia International Raceway Runoffs 20232023-09-23									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%)
22 rule changes (FE: 3, T1: 19)3 cars added · 3 weight · 2 aero · 2 engine · 2 induction · 2 tyres & wheels · 1 removed · 1 suspension & brakes · 2 wording · 4 othershowhide 2023-08-01 T1 Why no Camaro? #34421cars added 2023-08-01 T1 Request to Remove Expiration from T1 spec lines #1350 & #1370 #34470other 2023-08-01 T1 Remove #34475other 2023-08-01 T1 Error in T1 GT4 numbering scheme- #34578wording 2023-08-01 T1 C5 Approved Aero That Was Mistakenly Deleted #34374aero 2023-07-01 T1 Viper Cleanup #34107induction 2023-07-01 T1 Viper 8300 OEM FPR Size #34268induction 2023-07-01 T1 Ford Mustang S197 (05-14) Clarification #34450wording 2023-07-01 T1 Gen 5 Camaro Engine #33875engine 2023-07-01 T1 Inquiry to letter #33682 #34071engine 2023-06-01 T1 Request to reinstate T1 S197 Mustang #34048cars added 2023-05-01 T1 T1 GT4 adjustments #33786other 2023-05-01 T1 Touring 1 Tire Sizes #34191tyres & wheels 2023-04-01 FE Update FE SADEV Transmission Rule #33883other 2023-04-01 T1 Clarification for Camaro Gen5 2010-2015 #33739cars added 2023-03-01 T1 Sequential Gearbox Limitations in T1 #33691weight 2023-03-01 T1 T1 GT4 adjustments #33786weight 2023-03-01 T1 Sunset of pre 2023 Touring 1 Rules. #33916removed 2023-02-01 T1 Corrections to T1 Spec Lines #33678tyres & wheels 2023-01-01 T1 GT4 section to Current T1 Rules. #33632weight 2022-10-01 FE Brake bias adjuster clarification #33084suspension & brakes 2022-10-01 FE FE Front and Rear Wing Update & Clarification #33089aero
	Virginia International Raceway Runoffs 20222022-09-24				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%)			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%)
21 rule changes (FE: 4, F5: 6, T1: 11)5 weight · 4 engine · 3 induction · 2 cars added · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 4 othershowhide 2022-09-01 F5 Intake Boots Correction #33028induction 2022-09-01 FE Engine Heat Shield & Insulation #33019engine 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engine 2022-08-01 T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs #32824weight -25 lbs 2022-07-01 F5 Clarify stepped exhaust header references #32743engine 2022-06-01 F5 593 carb boot availability and oil pump clarification #32527induction 2022-06-01 FE Update FE/FE2 Tire Rule #32613tyres & wheels 2022-06-01 FE Master cylinder clarification #32669engine 2022-06-01 T1 Fix FP350S limited prep and Shelby 350 full prep issues #31680induction 2022-06-01 T1 Request to Classify AMG GT4 #32610cars added 2022-04-01 T1 Viper/Z06 Parity #31942weight -50 lbs 2022-04-01 T1 Discrepancy in T1 allowances #32293other 2022-04-01 T1 T1 RX7 classification #32352cars added 2022-03-01 F5 E&O class name #32194other 2022-03-01 T1 Weight reduction E&O #30791weight -25 lbs 2022-03-01 T1 Performance Adjustment Request for Camaro #31521weight -50 lbs 2022-03-01 T1 Remove 33m Brake rotor thickness rule #31954suspension & brakes 2022-01-01 F5 Data Box Mounting Plate #31638other 2021-12-01 FE Two FE2 Rule Updates #31524other 2021-12-01 T1 Turbo Miata Help #31315weight +200 lbs 2021-12-01 T1 Fix the T1 Corvette heading #31528wording
	Indianapolis Motor Speedway Runoffs 20212021-09-25				1:42.619Ryan 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			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
25 rule changes (FE: 4, F5: 3, T1: 18)4 cars added · 4 engine · 3 weight · 2 suspension & brakes · 2 tyres & wheels · 1 aero · 1 induction · 3 wording · 5 othershowhide 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-08-01 T1 T1 E46 BOP E&O for Letter # 29970 #30934weight +100 lbs 2021-07-01 FE FE Tire Rule Changes #30754tyres & wheels 2021-07-01 FE Radiator Screens Clarification #30792wording 2021-07-01 T1 Request BoP for the Viper in 1 LP #29968other 2021-07-01 T1 LS6 Alternative Head Question #30074engine 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine 2021-06-01 FE FE Radiator Screens #30575other 2021-06-01 T1 T1-LP - Add Performance Pack, Bullet, Mach 1 to 18+ Mustang #29849induction 2021-06-01 T1 Request BoP for the Viper in 1 LP #29968other 2021-06-01 T1 Request to classify C7 and 13Viper in T1 LP #29969cars added 2021-06-01 T1 Request LP Z06 steel chassis #30589other 2021-05-01 T1 Request For Reduction in Weight/Penalties for Camaro #30443weight 2021-05-01 T1 Fix dry sump Contradictions in T1-LP vs T2 #30596suspension & brakes 2021-03-01 T1 T1 LP Aero adjustments #30196aero 2021-02-01 T1 Request to Clarify Miller Mustang Classification #28728engine 2021-02-01 T1 BMW E46 Carbon Dash #29806engine 2021-02-01 T1 Request to Update T1 Mustang Spec Line #30001other 2021-02-01 T1 Dodge Viper 8400 OEM??? #30174cars added 2021-02-01 T1 Class BMW M2CS Club Sport #30195cars added 2021-02-01 T1 997.1 GT3 Cup #30229cars added 2021-01-01 T1 Correct T1 Limited Prep Years #29708wording 2020-12-01 FE FE / FE2 Spring Updates #29689suspension & brakes 2020-12-01 T1 Changes to Corvette C8 #29898weight -100 lbs
	Road America Runoffs 20202020-10-02				2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s	2:21.391James Weida · fastest of 14 · top 5 within 1.5s	143.2Aaron Ellis			2:17.646Andrew Aquilante · fastest of 15 · top 5 within 3.7s	2:18.701Mark Boden · fastest of 14 · top 5 within 3.0s	158.8James Candelaria
24 rule changes (FE: 5, F5: 6, T1: 13)5 aero · 4 suspension & brakes · 4 weight · 3 engine · 2 induction · 1 cars added · 1 tyres & wheels · 1 wording · 3 othershowhide 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-10-01 FE FE Gurney Flap Spec Update #29445aero 2020-08-01 T1 Touring Gurney flap wicker clarification #29013aero 2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices #28359other 2020-07-01 F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine 2020-07-01 F5 Re letter requesting driver adjustable carb mixture #28840other 2020-07-01 F5 #28359 WDYT Request for Cockpit Adjustment #28875other 2020-06-01 FE FE Gurney flap wicker clarification #28885aero 2020-06-01 T1 Consider coil spring conversion Corvette in T2 #28824suspension & brakes 2020-05-01 FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes 2020-05-01 T1 Additional Clarification on 996 Cup in T1 From Letter #28040 #28060wording 2020-05-01 T1 Request SPEC Corvette Rear Spolier #28182aero 2020-05-01 T1 T1 Rear Brake Rotor Size Exemption for Gen 5 Camaro #28402suspension & brakes 2020-04-01 T1 Request 996 GT3 Trunk for Wing Allowance. #28153aero 2020-04-01 T1 All Touring, Change DOT Tire Language 9.1.9.1, 9.3.45 #28452tyres & wheels 2020-03-01 T1 Request for E46 wagon with S54 engine in T1 #27427engine 2020-02-01 T1 Request to include Subaru WRX/STI 02-18 in T1 #24916induction 2020-02-01 T1 Request Ford Mustang FP350S T1-LP weight and restrictor change #26662weight +100 lbs 2020-02-01 T1 Request to classify Ford Coyote 3rd Gen OEM #27145cars added 2020-02-01 T1 Request alternate dashboard #27276weight 2020-02-01 T1 Request for Allowance of Coil Springs on Limited Prep C6 Corvette #27713suspension & brakes 2020-01-01 F5 Change 600cc restrictor size #27883induction 2020-01-01 FE Request for FE / FE2 preparation rules update #27722weight 2019-12-01 FE FE / FE2 Update Rules #27624weight
	Virginia International Raceway Runoffs 20192019-10-05	1:54.710Mark Snyder · fastest of 9 · top 5 within 1.3s	1:55.648Mark Snyder · fastest of 9 · top 5 within 0.9s	135.5James Libecco	1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s	1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s	142.8Eric McRee	+1.924squal +2.651s	101.7%qual 102.3%	1:54.771Andrew Aquilante · fastest of 19 · top 5 within 3.1s	2:14.413Andrew Aquilante · fastest of 15 · top 5 within 4.8s	156.2Mark Boden	+18.765squal +0.061s	116.2%qual 100.1%
25 rule changes (FE: 5, F5: 1, T1: 19)7 weight · 6 cars added · 4 tyres & wheels · 3 suspension & brakes · 1 aero · 1 induction · 1 wording · 2 othershowhide 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-08-31 T1 T1 LP 2016 Camaro and Later #27198weight -100 lbs 2019-08-01 T1 Request to return Ford Mustang Challenge Car to T1 #26751cars added 2019-08-01 T1 Correct years in T1 FP Corvette spec #27023wording 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-07-01 T1 Request BoP Baten - T1 Camaro - Follow up to Letter # 26145 #26900induction 2019-05-31 FE FE Anti-Roll Bar Clarification #26912suspension & brakes 2019-05-31 FE FE / FE2 Updated Bubble Tail Rule #26913other 2019-05-31 T1 Clarify DOT tires touring #26556tyres & wheels 2019-05-01 T1 Request to Classify EcoBoost Mustang #25841cars added 2019-05-01 T1 Request Corvette aerodynamic aids #26265aero 2019-05-01 T1 Audi TTRS VTS Documentation Revision #26578other 2019-05-01 T1 Request Ride Height Clarification #26599suspension & brakes 2019-05-01 T1 Opposes Unfair weight and throttle restrictor #26719weight -300 lbs 2019-04-01 T1 Request to classify the Porsche 928GTS/S4 in Touring 1 #26315cars added 2019-03-01 FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels 2019-03-01 T1 Request Mustang GT Limited Prep 2018 Classification #24431cars added 2019-01-01 T1 Class 2015+ Mustang GT350(R) #21466weight 2019-01-01 T1 Request to Classify Ford FP350S in T1-LP #25341cars added 2019-01-01 T1 Amendment to Request #25555 #25556suspension & brakes 2019-01-01 T1 Request to balance 996 v 997 T1 weight #25658weight 2019-01-01 T1 Request to Add PDK Transmission to 997 Porsche Spec Line #25668cars added 2019-01-01 T1 T1 World Challenge/Grand AM Spec Cars #25687weight 2019-01-01 T1 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
	Sonoma Raceway Runoffs 20182018-10-10	1:37.517Mark Snyder · fastest of 10 · top 5 within 1.4s	1:38.504Lee Rackley · fastest of 10 · top 5 within 0.8s	124.7Quinten Nelson	1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s	1:42.491David Lapham · fastest of 5 · top 5 within 9.5s	113.3David Lapham	+3.987squal +4.290s	104.0%qual 104.4%	1:39.970Kristofer Olson · fastest of 16 · top 5 within 3.8s	1:41.125Kristofer Olson · fastest of 15 · top 5 within 3.0s	108.6Brad McCall	+2.621squal +2.453s	102.7%qual 102.5%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:39.177Elliot Finlayson · fastest of 35 · top 5 within 1.3s	1:39.726Elliot Finlayson · fastest of 35 · top 5 within 0.8s		1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s	1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s		+3.134squal +3.959s	103.1%qual 104.0%	1:41.793Andrew Aquilante · fastest of 22 · top 5 within 2.9s	1:42.871Andrew Aquilante · fastest of 21 · top 5 within 2.9s		+3.145squal +2.616s	103.2%qual 102.6%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:27.636Scott Rettich · fastest of 9 · top 5 within 1.7s	1:30.563Hanna Zellers · fastest of 9 · top 5 within 2.2s		1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s	1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s		-0.710squal +0.892s	99.2%qual 101.0%	1:28.656Ross Murray · fastest of 17 · top 5 within 1.4s	1:29.309Ross Murray · fastest of 15 · top 5 within 1.1s		-1.254squal +1.020s	98.6%qual 101.2%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	1:57.824Scott Rettich · fastest of 16 · top 5 within 1.0s	1:59.040Scott Rettich · fastest of 16 · top 5 within 1.3s		2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s	2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s		+4.258squal +4.000s	103.6%qual 103.4%	1:53.562Andrew Aquilante · fastest of 12 · top 5 within 2.5s	1:55.494Andrew Aquilante · fastest of 12 · top 5 within 2.1s		-3.546squal -4.262s	97.0%qual 96.4%

By track

Track	Events	Typical % of FE	Best	Latest
Road America	3	0 of 3 with FE
Virginia International Raceway	3	100.0%1 of 3 with FE	100.0%Runoffs 2019	100.0%Runoffs 2019
Indianapolis Motor Speedway	2	100.0%1 of 2 with FE	100.0%Runoffs 2017	100.0%Runoffs 2017
Daytona International Speedway	1	100.0%	100.0%Runoffs 2015	100.0%Runoffs 2015
Mid-Ohio Sports Car Course	1	100.0%	100.0%Runoffs 2016	100.0%Runoffs 2016
Sonoma Raceway	1	100.0%	100.0%Runoffs 2018	100.0%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 FE'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.