BoP Lab / Classes / FRI

FRI vs GTX vs F5 pace at every track

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Series Runoffs Super Tour Both

Reference · what % is measured against, 8 events

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 Road America Sebring International Raceway Sonoma Raceway Summit Point Raceway Virginia International Raceway Watkins Glen International World Wide Technology Raceway

FRIGTXF5solid race · dashed qualifying · slower is lower

	Event	FRI			GTX				F5
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs FRI	Qual best	Race best	Trap	vs FRI
	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%)
14 rule changes (GTX: 8, F5: 6)4 cars added · 3 induction · 2 engine · 1 suspension & brakes · 1 weight · 3 othershowhide 2022-09-01 F5 Intake Boots Correction #33028induction 2022-09-01 GTX Tail lights on all GT category race cars. #32799suspension & brakes 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engine 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 GTX Classify 992 GT3 Cup #32649cars added 2022-05-01 GTX Add Classification to the accepted Model Table #31981weight 2022-05-01 GTX Request to classify C7 Corvette Grand Sport IN GTX Misc #32254cars added 2022-05-01 GTX E&O list of eligible prototypes #32511other 2022-03-01 F5 E&O class name #32194other 2022-03-01 GTX McLaren 720s GT3 #31955cars added 2022-02-01 GTX Remove restrictions from GTX-FIA GT3 #32039induction 2022-01-01 F5 Data Box Mounting Plate #31638other 2021-10-01 GTX Request car classification #31032cars added
	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
7 rule changes (GTX: 4, F5: 3)3 cars added · 1 engine · 1 tyres & wheels · 2 wordingshowhide 2021-09-01 GTX Request to classify 2020 Porsche 718 GT4 Clubsport MR #30956cars added 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-08-01 GTX Request to Update GTA Obsolete Part Numbers #30615wording 2021-08-01 GTX GTX class correction to GT2/ST #30973cars added 2021-07-01 GTX Request classification of Grullon #30481cars added 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine
	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
16 rule changes (GTX: 10, F5: 6)5 cars added · 3 aero · 2 engine · 2 induction · 4 othershowhide 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-09-01 GTX GT Category Wording #29193induction 2020-08-01 GTX Request Car classification #28935cars added 2020-08-01 GTX X-Bow GT4 #29088cars added 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 2020-07-01 GTX TA2 Gurney flap wicker clarification #28874aero 2020-07-01 GTX STO Gurney flap wicker clarification #28883aero 2020-07-01 GTX GT Gurney flap wicker clarification #28909aero 2020-06-01 GTX Request to Re-classify SP Stock car to GTX #28333cars added 2020-05-01 GTX Request to Classify Lotus Evora GTS #27057cars added 2020-02-01 GTX Windshield Clips #27323other 2020-01-01 F5 Change 600cc restrictor size #27883induction 2020-01-01 GTX Request Factory Five Daytona coupe classification #26308cars added
	Virginia International Raceway Runoffs 20192019-10-05								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
6 rule changes (GTX: 5, F5: 1)2 cars added · 1 engine · 1 suspension & brakes · 1 weight · 1 othershowhide 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-05-01 GTX Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GTX Request to Classify Ligier JS2 R #26535cars added 2019-04-01 GTX Request Ride Height Clarification #26600suspension & brakes 2019-03-01 GTX Replace FIA references with SRO #26427other 2019-01-01 GTX GTX Homologation table update #26034cars added
	Sonoma Raceway Runoffs 20182018-10-10								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
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25								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
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19								1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s	1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21								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

By track

Track	Events
Indianapolis Motor Speedway	2
Virginia International Raceway	2
Daytona International Speedway	1
Mid-Ohio Sports Car Course	1
Road America	1
Sonoma Raceway	1

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 the reference class'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.