BoP Lab / Classes / FE

FE vs FM vs GT2 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 +FA +FC +FE×FE2 +FF +vsFM ×FP +FV +FX +GT1 +vsGT2 ×GTX +HP +P +P2 +SM +SMX +SRF3 +STL +STU +T1 +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 · FM 97.1% of FE Jacob Loomis, Mid-Ohio Sports Car Course Runoffs 2016 race · GT2 95.4% of FE Jordan Bupp, Daytona International Speedway Runoffs 2015 race

% of FELap times

FEFMGT2solid race · dashed qualifying · slower is lower

FEFMGT2solid 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			FM					GT2
	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 20262026-09-28									2:09.634John Atwell · fastest of 18 · top 5 within 4.3s-2.173s (-1.65%)	2:10.650John Atwell · fastest of 18 · top 5 within 4.1s-2.797s (-2.10%)	163.0Jack Stanford-0.3 mph (-0.2%)
15 rule changes (FE: 2, GT2: 13)3 cars added · 2 engine · 2 tyres & wheels · 2 weight · 1 induction · 1 removed · 4 othershowhide 2026-05-01 GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584tyres & wheels 2026-05-01 GT2 Appendix L Update #39923tyres & wheels 2026-05-01 GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125other 2026-04-01 GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838weight -100 lbs 2026-04-01 GT2 GT2 Porsche 997.2 GT3 Cup #39936weight 2026-03-01 GT2 Classification Request - Ginetta G56 GT4 (V8) #39625cars added 2026-03-01 GT2 Remove GT3U from GCR as it is now in STU #39862removed 2026-03-01 GT2 Audi R8 GT4 remove spec line notes #39864other 2026-02-01 GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249engine 2026-02-01 GT2 Classify T1 BMW in GT2 #39408cars added 2026-01-01 FE FE & FE2 Rule Updates #39484engine 2026-01-01 GT2 Additional Body Options to Replace Older Stock Car Bodies #39086other 2026-01-01 GT2 GT3 Turbo to GT2? #39365induction 2026-01-01 GT2 Tech Bulletins for GT2 and GT2-ST #39537cars added -100 lbs 2025-10-01 FE FE & FE2 Bubble Tail #38978other
	Road America Runoffs 20252025-09-29									2:11.807Brad McAllister · fastest of 16 · top 5 within 3.4s-0.053s (-0.04%)	2:13.447John Atwell · fastest of 13 · top 5 within 3.6s+0.136s (+0.10%)	163.3Charlie Peter-1.0 mph (-0.6%)
9 rule changes (FE: 2, GT2: 7)3 aero · 2 weight · 1 cars added · 1 engine · 1 induction · 1 suspension & brakesshowhide 2025-09-01 FE FE & FE2 Rule Updates #38901weight 2025-08-01 GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506aero 2025-03-01 GT2 Hood Bulge allowed #37000engine 2025-03-01 GT2 OEM Wing Adjustment #37590aero 2025-02-01 GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538weight 2025-01-01 GT2 Panoz Esperante GTS BOP #36686cars added 2025-01-01 GT2 Correct language regarding OEM Areo Devices #37137aero 2025-01-01 GT2 GT2 Sunbeam Tiger Alternate Carburetor #37198induction 2024-12-01 FE Brake Line to A-Arm Covers #37110suspension & brakes
	Road America Runoffs 20242024-10-01									2:11.860Charlie Peter · fastest of 23 · top 5 within 1.1s-0.438s (-0.33%)	2:13.311John Atwell · fastest of 23 · top 5 within 0.9s-0.968s (-0.72%)	164.3Jonathan Start+2.1 mph (+1.3%)
18 rule changes (FE: 5, GT2: 13)4 weight · 2 cars added · 2 engine · 2 induction · 2 tyres & wheels · 1 aero · 3 wording · 2 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 2024-07-01 GT2 GT2-ST Rule Clarification #36093wording 2024-07-01 GT2 GT4 cars may run in GT2-ST #36235weight 2024-05-01 GT2 Request for Spec Line 1010 Reconsideration #35009weight +300 lbs 2024-05-01 GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878induction 2024-03-01 GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759cars added 2024-03-01 GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408cars added 2024-02-01 GT2 Rear Blade Spoiler Clarification #35261aero 2024-02-01 GT2 GT Direct Injection allowance and rules #35437engine 2024-02-01 GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385weight -150 lbs 2024-02-01 GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine 2024-01-01 FE Update FE Rain Light Rule #34707other 2024-01-01 FE FE/FE2 rule update #35269other 2024-01-01 GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200induction 2023-12-01 GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight 2023-10-01 GT2 Late E & O #34966wording
	Virginia International Raceway Runoffs 20232023-09-23									1:52.004Barry Boes · fastest of 15 · top 5 within 1.6s+0.918s (+0.83%)	1:52.865Jared Odrick · fastest of 15 · top 5 within 1.0s-0.183s (-0.16%)	164.0Tom Patton-0.2 mph (-0.1%)
22 rule changes (FE: 3, GT2: 19)8 induction · 4 weight · 3 aero · 2 cars added · 2 engine · 1 suspension & brakes · 1 tyres & wheels · 1 othershowhide 2023-09-01 GT2 GT2 Mazda 20B 3 rotor ENO #34765weight -220 lbs 2023-07-01 GT2 appendix letter #33635 #34206weight 2023-07-01 GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342weight 2023-05-01 GT2 Request to class 2011 Porsche Cayman S #33771cars added 2023-05-01 GT2 Please classify Fields Cardinal V8 #33784cars added 2023-04-01 FE Update FE SADEV Transmission Rule #33883other 2023-04-01 GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825engine 2023-02-01 GT2 GT2 Mazda 13B Turbo #33729induction 2023-01-01 GT2 Request Permission to Use a Substitute Turbo #33337induction 2023-01-01 GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342induction 2023-01-01 GT2 Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine 2023-01-01 GT2 GT2 Mazda 13b turbocharger part # update #33437induction 2023-01-01 GT2 GT2-ST BMW E36/46 spec line remove #33610aero 2023-01-01 GT2 GT3 Choke option effective 1-01-2023 #33669induction 2023-01-01 GT2 GT3 2.0L choke/weight option #33670weight 2023-01-01 GT2 BOP adjustment for GT2 & GT2-ST #33681induction 2022-12-01 GT2 GT2 (TA2)/GTA Part Number Update #33315induction 2022-12-01 GT2 Ginetta G56 GTA - Optional Wheels #33357tyres & wheels 2022-11-01 GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447aero 2022-10-01 FE Brake bias adjuster clarification #33084suspension & brakes 2022-10-01 FE FE Front and Rear Wing Update & Clarification #33089aero 2022-10-01 GT2 Request for C5/C6 Corvette Restrictor Size Review #32982induction
	Virginia International Raceway Runoffs 20222022-09-24									1:51.086Andrew Aquilante · fastest of 23 · top 5 within 1.1s+0.904s (+0.82%)	1:53.048Daniel Bender · fastest of 17 · top 5 within 3.1s+0.573s (+0.51%)	164.2Scotty B White+1.4 mph (+0.9%)
18 rule changes (FE: 4, GT2: 14)5 cars added · 3 induction · 2 engine · 2 suspension & brakes · 1 tyres & wheels · 1 weight · 2 wording · 2 othershowhide 2022-09-01 FE Engine Heat Shield & Insulation #33019engine 2022-09-01 GT2 Tail lights on all GT category race cars. #32799suspension & brakes 2022-09-01 GT2 Addendum to letter #32514 Ginetta GTA G56 #33076cars added 2022-08-01 GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682wording 2022-08-01 GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698other 2022-08-01 GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805cars added 2022-06-01 FE Update FE/FE2 Tire Rule #32613tyres & wheels 2022-06-01 FE Master cylinder clarification #32669engine 2022-05-01 GT2 Typo in rules for shocks #32308suspension & brakes 2022-05-01 GT2 additional response to letters #31898 & 32083 #32424weight +140 lbs 2022-03-01 GT2 Request to Classify Ginetta G40 in GT2 #31597cars added 2022-03-01 GT2 2021 Supra GR GT4 #31737cars added 2022-03-01 GT2 Proposed Technical Bulletin #31900induction 2022-02-01 GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991wording 2022-01-01 GT2 Restrictor Clarification for 2015 Cayman #31451induction 2021-12-01 FE Two FE2 Rule Updates #31524other 2021-10-01 GT2 Turbo Request for 13B Engine #30656induction 2021-10-01 GT2 Request car classification #31032cars added
	Indianapolis Motor Speedway Runoffs 20212021-09-25									1:39.665Andrew Aquilante · fastest of 22 · top 5 within 1.8s-0.254s (-0.25%)	2:03.513Tim Kezman · fastest of 18 · top 5 within 9.6s+22.537s (+22.32%)	163.7Jonathan Start
20 rule changes (FE: 4, GT2: 16)6 weight · 5 engine · 2 cars added · 2 tyres & wheels · 1 suspension & brakes · 2 wording · 2 othershowhide 2021-09-01 GT2 Correct letter 30565 GT2/ST #31088weight 2021-08-01 GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339cars added 2021-08-01 GT2 Request to Update GTA Obsolete Part Numbers #30615wording 2021-08-01 GT2 GTX class correction to GT2/ST #30973cars added 2021-07-01 FE FE Tire Rule Changes #30754tyres & wheels 2021-07-01 FE Radiator Screens Clarification #30792wording 2021-07-01 GT2 Porsche Cayman Engine Modification and Engine Request #30472engine 2021-07-01 GT2 Request weight clarification Viper CC #30565weight 2021-07-01 GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641weight 2021-06-01 FE FE Radiator Screens #30575other 2021-04-01 GT2 GT2 tiger firing order #30421engine 2021-03-01 GT2 GT2-ST CORVETTE CHANGES #30029weight +100 lbs 2021-03-01 GT2 Request underfloor clarification #30121tyres & wheels 2021-03-01 GT2 29742 Change new wording to read as: #30329engine 2021-02-01 GT2 ABS Restrictions #30064other 2021-02-01 GT2 RM 21-01 C6 & C7 clarification #30192weight 2021-01-01 GT2 Request change to engine firing order rule #29742engine 2021-01-01 GT2 Request E-46 BMW M3 balance of performance #29833weight -100 lbs 2020-12-01 FE FE / FE2 Spring Updates #29689suspension & brakes 2020-12-01 GT2 Request for Bigger Engine in Plymouth Breeze #29380engine
	Road America Runoffs 20202020-10-02									2:12.298Andrew Aquilante · fastest of 20 · top 5 within 2.9s	2:14.279Andrew Aquilante · fastest of 19 · top 5 within 2.4s	162.2Scotty B White
31 rule changes (FE: 5, GT2: 26)9 weight · 6 aero · 4 induction · 3 engine · 2 cars added · 1 suspension & brakes · 2 wording · 4 othershowhide 2020-10-01 FE FE Gurney Flap Spec Update #29445aero 2020-10-01 GT2 rescind GT2 stock car bodies removal #29219other 2020-10-01 GT2 E&O Typos in Appendix L #29447wording 2020-10-01 GT2 GT2 wing width wording correction #29469aero 2020-09-01 GT2 GT Category Wording #29193induction 2020-09-01 GT2 Corvette GT2-ST intake manifold #29221induction 2020-09-01 GT2 997.2 E&O link to 27915 #29373other 2020-08-01 GT2 Request for allowance Trans Am SGT #28951weight 2020-08-01 GT2 Omitted GT2 fender/hood openings #29171other 2020-07-01 GT2 TA2 Gurney flap wicker clarification #28874aero 2020-07-01 GT2 STO Gurney flap wicker clarification #28883aero 2020-07-01 GT2 GT Gurney flap wicker clarification #28909aero 2020-06-01 FE FE Gurney flap wicker clarification #28885aero 2020-06-01 GT2 Request to Adjust Weight of OEM 8.4 Viper #28739weight -50 lbs 2020-06-01 GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896weight -50 lbs 2020-05-01 FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes 2020-05-01 GT2 Request Corvette engine parity #28576engine 2020-04-01 GT2 Request to revisit Panoz GT-S BoP #28280engine 2020-04-01 GT2 GT2-ST Corvette LS2 & L76 #28583weight 2020-04-01 GT2 GT2-ST Corvette L76 #28584weight 2020-03-01 GT2 Request 991.2 Porsche engine displacement verify typo #28194engine 2020-02-01 GT2 Windshield Clips #27323other 2020-02-01 GT2 Request to Add Chevrolet SS Body to Appendix L #27898wording 2020-01-01 FE Request for FE / FE2 preparation rules update #27722weight 2020-01-01 GT2 Request Factory Five Daytona coupe classification #26308cars added 2020-01-01 GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701cars added 2020-01-01 GT2 Request for Acura NSX Spec Line Changes #27755weight 2020-01-01 GT2 GT2 991.1 restrictor size change #27914induction 2020-01-01 GT2 GT2 996/997.1 weight change #27915weight -100 lbs 2020-01-01 GT2 GT2/ST Corvette comp adjustment #27920induction 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	1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s	2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s	135.7Bryce Cornet	+20.168squal +0.414s	117.4%qual 100.4%	1:50.182Andrew Aquilante · fastest of 24 · top 5 within 4.5s	1:52.475Andrew Aquilante · fastest of 19 · top 5 within 3.3s	162.8Tom Patton	-3.173squal -4.528s	97.3%qual 96.1%
26 rule changes (FE: 5, GT2: 21)7 cars added · 7 weight · 4 engine · 3 tyres & wheels · 2 suspension & brakes · 1 wording · 2 othershowhide 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-07-01 GT2 TA2 Weight Clarification #27077weight 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 GT2 Request to classify Toyota Supra with 3SGTE engine #25185cars added 2019-05-31 GT2 Request to Classify Acura NSX from T1 to GT2? #26121cars added 2019-05-31 GT2 Request for TA2 BOP in GT2 #26509weight 2019-05-01 GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106engine 2019-05-01 GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GT2 Request to Classify Ligier JS2 R #26535cars added 2019-04-01 GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159engine 2019-04-01 GT2 Request Ride Height Clarification #26600suspension & brakes 2019-03-01 FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels 2019-03-01 GT2 Request Porsche Cayman year classification #26241other 2019-03-01 GT2 GT2/ST Porsche Cayman engine #26250engine 2019-01-01 GT2 ST/GT2 BMW Flossman Kit Clarification #22138wording 2019-01-01 GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110weight 2019-01-01 GT2 Request to classify BMW E82 (1 series) into GT2 #25539cars added 2019-01-01 GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545weight 2019-01-01 GT2 Request - Classify Ford Performance 5.2l #25716cars added 2019-01-01 GT2 Add missing displacement, minimum weight. Remove #25765weight 2019-01-01 GT2 Request for Ford FP 350s Weight Reduction #25806weight 2019-01-01 GT2 Request to Classify EcoBoost Mustang #25842cars added 2019-01-01 GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024weight 2019-01-01 GT2 GTX Homologation table update #26034cars added
	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	1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s	1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s	124.1Melvin David Kemper Jr	-0.595squal +0.081s	99.4%qual 100.1%	1:37.203Andrew Aquilante · fastest of 22 · top 5 within 2.1s	1:38.524R Spencer Trenery · fastest of 19 · top 5 within 1.3s	133.8Michael McAleenan	+0.020squal -0.314s	100.0%qual 99.7%
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		1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s	1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s		+1.420squal +2.054s	101.4%qual 102.1%	1:39.919Andrew Aquilante · fastest of 36 · top 5 within 2.9s	1:40.976Andrew Aquilante · fastest of 35 · top 5 within 2.6s		+1.250squal +0.742s	101.3%qual 100.7%
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		1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s	1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s		-2.641squal -1.593s	97.1%qual 98.2%	1:25.405Andrew Aquilante · fastest of 21 · top 5 within 2.8s	1:26.847Andrew Aquilante · fastest of 19 · top 5 within 1.5s		-3.716squal -2.231s	95.9%qual 97.5%
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		1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s	1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s		-1.011squal -0.020s	99.2%qual 100.0%	1:53.652Jordan Bupp · fastest of 27 · top 5 within 1.2s	1:53.543Jordan Bupp · fastest of 22 · top 5 within 1.7s		-5.497squal -4.172s	95.4%qual 96.5%

By track

Track	Events	Typical % of FE	Best	Latest
Road America	4	0 of 4 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.