BoP Lab / Classes / FE
FE vs F5 vs SRF vs GT1 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.
Quickest here: FE 1:27.636 Scott Rettich, Runoffs 2016 qualifying · F5 1:28.528 Calvin Stewart, Runoffs 2016 qualifying · SRF 1:37.344 Mike Miserendino, Runoffs 2016 qualifying · GT1 1:21.927 Cliff Ebben, Runoffs 2016 qualifying
| Event | FE | F5 | SRF | GT1 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | Qual best | Race best | Trap | vs FE | % of FE | Qual best | Race best | Trap | vs FE | % of FE | Qual best | Race best | Trap | vs FE | % of FE | |||
| Road America Runoffs 20262026-09-28 | 2:02.981Tony Ave · fastest of 12 · top 5 within 4.6s+1.708s (+1.41%) | 2:04.611Tony Ave · fastest of 12 · top 5 within 3.9s+0.553s (+0.45%) | 177.9Tony Ave-2.7 mph (-1.5%) | |||||||||||||||||
14 rule changes (FE: 2, SRF: 3, GT1: 9)6 cars added · 3 weight · 2 engine · 3 wording · SRF rain/brake light part number and GCR section reference corrected for original roll hoop mounting. · GT1 Porsche T/A Cup renamed T/A Cup, retains 1-11/16 inch flat plate, must run T/A Cup rule set. · GT1 adds T/A Porsche Cup with 1-11/16 inch max flat plate, must run T/A Porsche Cup rule set. · GT1 Lamborghini Huracan Trofeo, Evo 2, Evo 3 added; all three allowed to compete at as-run weight. · GT1-ST Lamborghini Huracán GT3 (2019–) minimum weight reduced to 2950 lbs. · GT1 GM 275ci carbureted V6 minimum weight reduced to 2295 lbs. · GT3U class removed from GCR; GT3U cars now compete in STU. · SRF3 spark plugs limited to NGK LTR7IX-11 P/N G301041 only; washers and sealing rings prohibited. · GT1 adds Porsche 992.1 GT3 Cup 2022–2025 with OEM ABS, traction control, RSR bumper, canards, and any exhaust. · FE adds engine modification restrictions, testing requirements, and drivetrain violation penalties with competition suspension. · GT1-ST Acura NSX GT3 EVO 22 minimum weight drops 100 lbs to 3000. · FE and FE2 Enterprise bubble tail part WM138014 now allowed; FE2 must use this configuration only. · Acura NSX GT3 EVO 22 reclassified from GT1 to GT1-ST, 3500cc, 3100 lbs minimum weight. · SRF3 adds HD Oil Cooler P/N G1148500 option alongside standard P/N G480503, no fan permitted.show
| ||||||||||||||||||||
| Road America Runoffs 20252025-09-29 | 2:01.273Tony Ave · fastest of 14 · top 5 within 7.7s-1.262s (-1.03%) | 2:04.058Tony Ave · fastest of 12 · top 5 within 5.8s-2.835s (-2.23%) | 180.6Dave Ruehlow-0.4 mph (-0.2%) | |||||||||||||||||
11 rule changes (FE: 2, SRF: 2, GT1: 7)3 cars added · 1 engine · 1 induction · 3 wording · 3 other · FE2 minimum weight stays 1270 lbs; intake manifold part number changes to WM301061; ECU to G992012; mandatory spec parts expanded; bubble tail WM138014 now FE only; SADEV transmission no modifications allowed; brake rotor part numbers to W… · GT1 LS Limited Prep engine expanded to include LS2, LS3, LS6 alongside LS1; compression ratio capped at 11:1. · SRF drivers with disabilities may modify seat and controls for safety and comfort with SCCA approval, noted in logbook, for that driver only. · SRF SADEV-SRF3 6-speed sequential transmission: effective date clarified to 1 April 2025 onward. · Acura NSX GT3 EVO 22 classified in GT1 with 3500cc twin turbo crossflow V-6, 3100 lbs, 7500 rpm max. · GT1 LS1 Limited Prep engine added, 2600 lbs with driver, 383 cubic inches maximum, hydraulic roller cam, 750 cfm carb. · TA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof height limit. · GT1-ST restrictor specifications removed for 13 cars; new values not provided. · FE must use SCCA Part # WM803010 Brake Line to Control Arm covers if used, as delivered, fastened with zip ties or tape only. · GT1-ST Lamborghini Huracán GT3 Evo and GT3 both move to unrestricted intake, replacing 39mm and 52mm restrictors. · GT1 Mazda 26B engine approved; minimum weight set to 2850 lbs.show
| ||||||||||||||||||||
| Road America Runoffs 20242024-10-01 | 2:02.535Dave Ruehlow · fastest of 10 · top 5 within 4.6s-0.401s (-0.33%) | 2:06.893Dave Ruehlow · fastest of 6 · top 5 within 50.8s+1.611s (+1.29%) | 181.0Dave Ruehlow+0.5 mph (+0.3%) | |||||||||||||||||
23 rule changes (FE: 5, SRF: 10, GT1: 8)3 engine · 2 suspension & brakes · 1 aero · 1 cars added · 1 tyres & wheels · 1 weight · 11 wording · 3 other · SRF3 air filter rule removes K&N RC-9160 option, specifies Weems P/N WM301020 only. · SRF Wilwood vented rotor minimum thickness increases to 13.25mm, 0.522 inches. · SRF3 Hoosier decal placement changed from four logos on nose and tail to three logos on sides and center front. · FE and SRF protest fee rules redirected to GCR section 8.3.1.D for fees and procedure. · FE Hoosier contingency decal requirement reduced from five decals in specific locations to three decals on sides and front. · FE and SRF protest fee rules redirected to GCR section 8.3.1.D for fees and procedure. · SRF Hoosier contingency decal requirement reduced from four decals in specific locations to three decals with simplified placement. · FE requires five Hoosier decals: one small on nose or front shock cover, one 12" on each front wing plate, one 12" on each lower floor panel before rear wheels. · SRF wet tyres: front P185/60R13 H20 or W2 and rear P205/60R13 H20 or W2 removed; front P185/65R13 W2 and rear P205/60R13 W2 now required. Hoosier decal placement specified. · GT2-ST Acura NSX minimum weight rises to 3000 lbs, restrictor increases to 45mm TIR. · GT1 Camaro 1993-2002 model years specified in GCR 9.1.2.E.1.b.3. · GT1-GTX rear blade spoiler: angle 50–75°, max 59.0 wide by 5.0 high inches; total area limit removed. · GT1, GT2, GT3, GTL, GTX Direct Injection now permitted if original equipment. · GT2 Nissan and GT3 Mazda, Mitsubishi 4G93, Nissan QR25DE/DD, QE25DE/DD now permit Direct Injection per 9.1.2.F.7.5.E. · FE rain light now must meet FIA Standard 8874-2019, Technical List No. 76, effective 1/1/2024. · FE allows racer's tape for crash repair, panel security, and heat exchanger opening control; seam taping banned. · GT1-ST adds Lamborghini Huracan GT3 EVO(1) 2018- at 3000 lbs, X39mm restrictor, and Huracan GT3 2019- at 3100 lbs, 52mm restrictor. · GT1 Trick Flow Specialties Ultra 18 Degree GM Cylinder Head Part #TFS-3181T001-CO1 allowed. · SRF rain/brake light must be Super Bright LEDs Inc. P/N PT-STRB-R24; secondary filament must connect to rain light switch. · SRF brake light must be Super Bright LEDs Inc. P/N PT-STRB-R24, with SCCA Enterprises P/N 180427A pigtail and strobing rain light kit. · SRF adds mandatory front brake ducts 12–36 inches, throttle pedal heel-toe extension, braided stainless flex lines, camber limit 5.0 degrees, radiator opening height 3½ ± ½ inches, rear shift cable clamp P/N WM302007A. · GTL spec lines moved contiguous with GT2 and GT3; GTA category and specs renumbered behind GTL; P2 engine tables reorganised with restrictor and weight specifications clarified. · SRF radiator options expanded: Enterprises P/N 480465 with baffle 480464, 480466, or Automotive 1R698 and CU698 allowed if cross-reference equivalent.show
| ||||||||||||||||||||
| Virginia International Raceway Runoffs 20232023-09-23 | 1:48.203David Pintaric · fastest of 5 · top 5 within 22.4s+1.395s (+1.31%) | 178.1David Pintaric-3.6 mph (-2.0%) | ||||||||||||||||||
13 rule changes (FE: 3, SRF: 3, GT1: 7)3 weight · 2 cars added · 2 tyres & wheels · 1 engine · 1 suspension & brakes · 4 wording · SRF wet front tyre changes to Hoosier P/N 46100 P185/60R13 H20 or W2 with 2.5" ground clearance. · Fields Cardinal V8 added to GT1 with Ford V8 engine, 4.9L, 2100 lbs, fuel injection. · SRF front W2 rain tyre Hoosier part number changes from 46100 to 46101 P185/65R13. · FE SADEV transmission rule removes note that all ratios under review and could be updated prior to sealing. · GT1 Mercedes AMG GT3 16-19 notes clarify FIA GT3 homologation compliance. · SRF removes 1985 Renault Alliance solid front rotor option; restrictor sizes decrease 1mm for newer Kawasaki and multi-brand engines; minimum weights increase to 1100 lbs. · GT1 sequential transmission weight penalty reduced from 50 lbs to 25 lbs. · GT1-ST Porsche 992 GT3 Cup added with 3997cc displacement, 2950 lb minimum weight, no restrictor. · GT2 TA2 and GTA throttle body part numbers updated to GM 12570790 or Edelbrock 33869/3870. · GT1 Trans Am bodywork weight penalty reduced from 100 lbs to 75 lbs. · GT1 Chevrolet RO7, Ford FR9, and Dodge R7 weight penalties cut from 50 lbs to 25 lbs each. · FE drivers may now adjust brake bias manually during the race. · FE front and rear wing specifications clarified: adjustment ranges, shimming, Gurney flap sizes, mounting hardware, and measurement references refined.show
| ||||||||||||||||||||
| 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%) | 1:46.808David Pintaric · fastest of 8 · top 5 within 3.7s+2.951s (+2.84%) | 2:18.094David Pintaric · fastest of 7 · top 5 within 13.7s+29.532s (+27.20%) | 181.7Adam Romito-1.5 mph (-0.8%) | ||||||||||||||
19 rule changes (FE: 4, F5: 6, SRF: 3, GT1: 6)3 cars added · 2 tyres & wheels · 1 engine · 7 wording · 6 other · F500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO. · FE engine heat shield and insulation between block and exhaust now permitted to protect fuel cell, filter, rail, lines. · GT1, GT2, GT3, GTL, GTX tail lights may now be original style or custom panel graphic with functioning red LED brake lamps. · F500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU. · GT1 allows current Trans Am bodywork with 100 lb weight penalty. · F500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area. · F500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted. · FE tires must be run as delivered in sets of 4. · FE master cylinders clarified: Girling front .700" piston WM802005, rear .750" piston WM802006. · SRF tire rule wording clarified: tires must be run as delivered. · SRF brake rotor minimum thickness reduced from 13.25 mm to 12.20 mm; seals and air filter specs clarified. · F500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2. · GT1 Mercedes Benz AMG GT3 added, 3050 lbs, 6208cc V8, 40mm restrictors, FIA GT3 homologation. · GT1 wheel width limits change: 12in front/13in rear standard, 18in wheels get 13in front/14in rear maximum. · GT1 allows 17-inch wheels; 18-inch wheels now permitted with 50 lb penalty; 18-inch tyres use 13-inch front, 14-inch rear width. · F5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs. · SRF wet tyres front P185/65R13 W2 option added; air box clarified as-delivered; SRF3 restrictor plate G301048 mandatory Jan 1 2022; P2 motorcycle engines up to 1005cc with 35mm restrictor, 2009+ stock 1075 lbs, 2008 stock 1025 lbs, modifie… · GT3 Volkswagen Fun Cup Beetle EVO3 classified, sealed SOHC 1984cc engine, 2060 lbs minimum weight.show
| ||||||||||||||||||||
| 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 | 1:35.279Michael Lewis · fastest of 20 · top 5 within 0.6s-0.729s (-0.76%) | 1:53.220David Pintaric · fastest of 14 · top 5 within 3.8s+17.033s (+17.71%) | 180.2Tom Smith | ||||||||||||||
14 rule changes (FE: 4, F5: 3, SRF: 6, GT1: 1)2 cars added · 1 aero · 1 engine · 1 suspension & brakes · 1 tyres & wheels · 7 wording · 1 other · F5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control. · F5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition. · GTA part numbers updated: 0-80541-1 to 0-80541-2 in two locations and 6010 to 6014X in TA2 Appendix. · SRF wet tyres add Hoosier W2 option alongside existing H20 from October 4, 2021. · SRF adds SADEV-SRF3 6-speed sequential transmission option with ratios 3.0–0.92:1 and 3.20 final drive. · SRF seal requirements clarified: seals now must be on driveline components in designated locations; unsealed components removed and inspected by CSR or Enterprises rather than engine shipped for testing. · FE removes qualifying tire marking requirements and rain tire set rules; renumbers tire warmer prohibition. · FE radiator screens may not protrude more than ¼ inch in front of the outside vertical plane of the sidepods. · F500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required. · FE radiator screens now allowed, maximum ¼ inch from sidepod front vertical plane. · SRF3 alternator pulley specified as P/N G902130 or G902130A, minimum 12oz. · SRF and SRF3 mandatory identification revised: removed Ford Performance and Blue Oval decals, added Hoosier logo placement. · FE front springs change to 800 lbs Hypercoil WM203013 Silver; rear to 900 lbs Hypercoil WM203014 Silver. · SRF rear springs limited to P/N 280390 only, previous part numbers no longer allowed; ground clearance wording clarified.show
| ||||||||||||||||||||
| 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 | 2:02.936Ernie Francis Jr · fastest of 16 · top 5 within 3.4s | 2:05.282Ernie Francis Jr · fastest of 16 · top 5 within 3.4s | 180.5Simon Gregg | ||||||||||||||
28 rule changes (FE: 5, F5: 6, SRF: 5, GT1: 12)5 cars added · 4 weight · 2 engine · 1 aero · 1 induction · 1 tyres & wheels · 13 wording · 1 other · F500 Suzuki GSXR600 engine years extended from 2003-2013 to 2003-2019. · FE Gurney flaps clarified: front wing secondary only at 0.500" ±0.030", rear wing at 0.250" ±0.030". · GT1/GT2/GT3/GTL/GTX turbocharging and supercharging now permitted if listed on spec line. · GT1 adds Trans Am spec engines: Chevrolet R07, Ford FR9, Dodge R7, each at base weight plus 50 lbs. · F5 request to adjust external jetting device cockpit control denied; no rule change made. · F5 driver adjustable carburettor mixture: refer to separate Fastrack letter #28359 for ruling. · F5 cockpit adjustment request response published in Fastrack letter 28359. · TA2 Gurney flap wording clarified: replace 'wicker bill' and 'wicker' with 'Gurney flap' throughout wing specifications. · STO rear wing rules clarify that wicker is called Gurney flap in two places; no performance change. · GT1 Gurney flap and wickerbill terminology clarified: 'lips' and 'tabs' and 'wicker' standardized to 'flaps' throughout section D and E. · GT Gurney flap wording clarified: wickerbill and tab terminology replaced with Gurney flap throughout sections 9.1.2.F.7.b. · FE Gurney flap wicker bill clarified: permitted on front wing secondary elements only, not main plane. · FE2 and FE spring part numbers WM203013 front and WM203014 rear required date moved to November 1, 2020. · SRF Penske shock P/N 280396 bump stop P/N 280407 becomes mandatory, maximum one per shock, effective 05/01/2020. · GT1, GT2, GT3, GTL, GTX may use bonded-glass factory windshields without clips or straps if attached per original specifications. · F500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. · FE2 Mazda 2.0L MZR engine now permitted in all SCCA events at 1250 lbs minimum; FE 2.3L becomes Regional Only through 2019 Runoffs. · GT2/ST Ford Coyote 5.0L third generation OEM gains Boss intake manifold option at 3200 lbs minimum. · GTX Misc. adds Factory Five Type 65 Coupe R Ford 302/351 and 5.0/5.2L NA at 2600 lbs, plus Ferrari 458/488 Challenge, Ford FP350S, Chevrolet C6, Lamborghini Super Trofeo. · GT1 sequential shifting transmissions weight penalty reduced from 75 lbs to 50 lbs. · GT1 cars not specified for 18 inch wheels now have 50 pound penalty, down from 100. · GT1 adds 5 Star NASCAR Camaro 2018 and later body as allowed bodywork option. · SRF rain and brake rule supersedes GCR 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. · FE minimum weight rises to 1270 lbs; FE2 minimum weight rises to 1270 lbs; new spring options added; tire warmers prohibited. · SRF adds tire warmer prohibition and specifies Hoosier dry and wet tire part numbers. · SRF front nose weight minimum reduced from 35 to 32 lbs. · SRF2 becomes Regional Only; SRF3 nomenclature changed from GEN3 to Ford 1.6L conversion; SRF and SRF3 no longer compete together for points.show
| ||||||||||||||||||||
| 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% | 1:43.857Tony Ave · fastest of 12 · top 5 within 3.9s | 1:48.562Tony Ave · fastest of 11 · top 5 within 11.4s | 183.2Tony Ave | -7.086squal -10.853s | 93.9%qual 90.5% | |||||||
13 rule changes (FE: 5, F5: 1, SRF: 1, GT1: 6)3 aero · 3 tyres & wheels · 2 cars added · 1 engine · 1 suspension & brakes · 1 weight · 1 wording · 1 other · FE Hoosier wet rear tire width increases from 7.5 to 8.0 inches, part number 44196 W3. · F500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs. · GT1 Porsche 944/968 added: 2981cc twin-turbo four, 2585 lbs minimum weight. · FE removes American Racer tires, mandates Hoosier dry tires 22.0 X 8.0-13 and 22.0 X 10.0-13, wet tires 22.0 X 7.5-13 and 22.0 X 9.0-13. · GT1 allows Trans Am rear wing, 72" span, 12" chord, 1/2" wicker, 100 sq in endplates, no weight penalty; front undertray allowed with 50 lb penalty. · SRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102. · FE anti-roll bar links may be removed one per end for safety, but bars must stay connected. · FE and FE2 Enterprise bubble tail P/N WM138014 newly allowed for both classes. · GTX tube frame cars now allowed fuel injection with maximum 90mm throttle body. · GTX adds Ligier JS2 R classification with restrictor and minimum weight. · GT1 and GT2/3/Lite remove ride height ground clearance rules; cars may now touch ground when tires deflate. · FE Hoosier rain tyre part numbers updated: front 44195 W3, rear 44217 W3. · GTX FIA GT3: Audi R8 now 40 mm restrictor and 2900 lbs; BMW Z4 now 70 mm restrictor and 2800 lbs; Ferrari 488 now 35 mm restrictor, TIR, and 3025 lbs.show
| ||||||||||||||||||||
| 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% | 1:35.673Michael Lewis · fastest of 8 · top 5 within 7.1s | 1:37.516Michael Lewis · fastest of 7 · top 5 within 5.3s | 111.6Preston Calvert | -0.988squal -1.844s | 99.0%qual 98.1% | |||||||
| 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% | 1:51.573Thomas Kirchman · fastest of 50 · top 5 within 2.8s | 1:53.769Todd Harris · fastest of 45 · top 5 within 0.2s | +14.043squal +12.396s | 114.1%qual 112.5% | 1:36.008David Pintaric · fastest of 17 · top 5 within 2.2s | 1:36.187Cliff Ebben · fastest of 16 · top 5 within 1.5s | -3.539squal -3.169s | 96.5%qual 96.8% | ||||||
| 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% | 1:37.344Mike Miserendino · fastest of 27 · top 5 within 0.8s | 1:37.621Todd Harris · fastest of 27 · top 5 within 0.6s | +7.058squal +9.708s | 107.8%qual 111.1% | 1:21.927Cliff Ebben · fastest of 8 · top 5 within 2.5s | 1:22.866Michael Lewis · fastest of 7 · top 5 within 2.1s | -7.697squal -5.709s | 91.5%qual 93.5% | ||||||
| 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 | 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% | 2:14.306Cliff White · fastest of 39 · top 5 within 1.2s | 2:16.700Cliff White · fastest of 38 · top 5 within 0.5s | +17.660squal +16.482s | 114.8%qual 114.0% | 1:44.244Michael Lewis · fastest of 11 · top 5 within 7.8s | 1:47.116Michael Lewis · fastest of 7 · top 5 within 8.3s | -11.924squal -13.580s | 90.0%qual 88.5% | ||||||
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, the track and its configuration cancel out, so one figure compares across tracks and years where lap times cannot. 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.