BoP Lab / Classes / FE2
FE2 vs FC vs AS pace at every track
Lap times across years say as much about the weather as the class. % of FE2 is each class's best lap as a share of FE2'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: FE2 1:35.040 Flinn Lazier, Runoffs 2018 qualifying · FC 1:21.962 John LaRue, Runoffs 2016 qualifying · AS 1:30.651 Tom Sloe, Runoffs 2016 qualifying
| Event | FE2 | FC | AS | ||||||||||||
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs FE2 | % of FE2 | Qual best | Race best | Trap | vs FE2 | % of FE2 | |||
| Road America Runoffs 20262026-09-28 | 2:12.326Franklin Futrelle · fastest of 8 · top 5 within 1.9s-0.149s (-0.11%) | 2:11.881Franklin Futrelle · fastest of 8 · top 5 within 1.6s-1.458s (-1.09%) | 143.5Steve Whitston-5.5 mph (-3.7%) | 2:10.686Brandon Dixon · fastest of 10 · top 5 within 4.0s-0.573s (-0.44%) | 2:11.389Brandon Dixon · fastest of 10 · top 5 within 2.7s-1.435s (-1.08%) | 143.3Dean Kiriluk-1.8 mph (-1.2%) | -0.492squal -1.640s | 99.6%qual 98.8% | 2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%) | 2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%) | 151.0Andrew McDermid-0.6 mph (-0.4%) | +16.590squal +14.585s | 112.6%qual 111.0% | ||
16 rule changes (FE2: 1, FC: 2, AS: 13)3 cars added · 3 weight · 2 engine · 1 induction · 1 suspension & brakes · 1 tyres & wheels · 2 wording · 3 other · AS Camaro 16+ Spec Line: 1LE front splitter kit permitted, belt tensioner and motor mount parts allowed, spark plug position defined. · AS class adds Pirelli P Zero Trofeo Track as permitted tyre option for competition. · AS class rear trailing arms no longer required to maintain stock length, only to locate rear axle. · AS Ford Mustang GT 4.6L 4-valve regains allowance, minimum weight 3200 lbs. · AS Ford Mustang Coupe GT 05-14 Gen3 Coyote minimum weight increases from 3100 to 3400 lbs. · AS GM LM7 5.3L must use full prep Holley carburetor as described in 9.1.6.D.c.1, not specifically 4776. · AS EFI engine build sheets add dry sump, header, camshaft, and timing chain tensioner options for LS, LT1, Ford, and Mopar engines. · AS LT1 Camaro engine build sheet added with full specs; LT1 weight 3200 lbs, GTO tire to 275, Mustang weight to 3525 lbs, oil catch tanks now required. · AS Spec Lines reorganized for 2026; detailed chassis, engine, weight, wheelbase, tire and brake specifications moved to main rules and engine build sheets. · AS GM LM7 5.3L gains Edelbrock 71187 intake manifold, MSD 6014 ignition box, Holly 4776 carb option under full prep spec line. · AS Ford Mustang and Mercury Capri with Restricted Prep engines get 61 mm restrictor, down from 64 mm. · FC USF2000 Tube Frame may now use Hewland LD200 4-speed H-pattern as alternative to Hewland JL-200 5-speed sequential. · FC F2000 Metrik ZF2 minimum weight reduced to 1220 lbs. · AS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft. · AS Cadillac CTS-V 04-07 Restricted Prep minimum weight drops to 3400 lbs. · FE and FE2 Enterprise bubble tail part WM138014 now allowed; FE2 must use this configuration only.show
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| Road America Runoffs 20252025-09-29 | 2:12.475Franklin Futrelle · fastest of 11 · top 5 within 1.4s+0.969s (+0.74%) | 2:13.339Franklin Futrelle · fastest of 10 · top 5 within 0.6s+0.591s (+0.45%) | 149.0Steve Whitston+3.7 mph (+2.6%) | 2:11.259Brandon Dixon · fastest of 10 · top 5 within 2.7s-0.367s (-0.28%) | 2:12.824Brandon Dixon · fastest of 9 · top 5 within 2.3s+1.290s (+0.98%) | 145.1Brandon Dixon+0.9 mph (+0.6%) | -0.515squal -1.216s | 99.6%qual 99.1% | 2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%) | 2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%) | 151.5Andrew McDermid+1.9 mph (+1.3%) | +15.893squal +14.317s | 111.9%qual 110.8% | ||
14 rule changes (FE2: 1, FC: 2, AS: 11)3 engine · 2 weight · 1 cars added · 1 induction · 4 wording · 3 other · AS Ford Mustang GT 5.0 2018- minimum weight reduced to 3525 lbs. · AS Ford Mustang GT 05-14 Restricted Prep Engine gains additional gear ratio option: 3.66, 2.43, 1.69, 1.32, 1.00, .65. · AS Ford Mustang GT 5.0L 15-17 flat plate restrictor reduces from 67mm to 64mm. · AS LS1/LS6 intakes added for 5.3L truck engine: part numbers 12561269 and 88894095. · AS Flotek head value seat cutting dimensions figure updated for consistency. · AS class notes cleaned: fuel cell and ECM specifications removed from multiple Camaro, Firebird, Challenger and Mustang variants. · FE2 allows pre-approved driver safety and comfort seat and control modifications for drivers with disabilities, per logbook. · AS removes 'Any ECM maybe used' note from five Cadillac and Chevrolet/Pontiac V8 Restricted Prep models. · AS Ford Mustang and Cobra Coyote engine restrictor increases to 80mm from 67mm or 64mm. · AS Mustang GT 05-14 Restricted loses 300 lbs engine; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively. · AS class: multiple American muscle cars gain additional allowed gear ratio options across model years and prep levels. · AS LS-engine cars gain ECU freedom: CTS-V, Camaro, Firebird (70–02) and Camaro SS may use any ECM. · FC tire rule clarified: four dry and four wet tires for Regionals and Majors, eight each for Runoffs; marking and declaration timing adjusted. · FF and FC sequential gearbox weight penalty reduces from 25 lbs to 10 lbs minimum weight addition.show
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| Road America Runoffs 20242024-10-01 | 2:11.506Porter Aiken · fastest of 18 · top 5 within 0.5s-1.300s (-0.98%) | 2:12.748Porter Aiken · fastest of 17 · top 5 within 2.0s-0.523s (-0.39%) | 145.3Porter Aiken+1.9 mph (+1.3%) | 2:11.626Timothy Minor · fastest of 10 · top 5 within 1.3s-1.018s (-0.77%) | 2:11.534Michael Varacins · fastest of 9 · top 5 within 1.8s-2.074s (-1.55%) | 144.2Michael Varacins+1.8 mph (+1.2%) | -1.214squal +0.120s | 99.1%qual 100.1% | 2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%) | 2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%) | 149.6Gregory Eaton+0.4 mph (+0.3%) | +13.681squal +15.072s | 110.3%qual 111.5% | ||
13 rule changes (FC: 2, AS: 11)6 cars added · 1 engine · 1 tyres & wheels · 1 weight · 4 other · AS Mustang GT 05-14 Restricted Prep and 2018- gain alternate transmission ratio options. · AS adds 2018-23 Ford Mustang GT 5.0L at 3600 lbs, 275 tire, 60mm restrictor, optional Brembo front brakes. · AS Chevrolet Camaro 1LE (2016-) added with 3600 lbs minimum weight, 275 tires, 60mm restrictor, 345/338mm brakes. · AS Chevrolet/Pontiac Camaro & Firebird 82–92 5.7L LS1 classified: 3200 lbs, 13.1×1.27 disc brakes, 17 in max wheel, 65 mm restrictor, SLP intake lid permitted. · AS Chevrolet Camaro, Firebird, and Ford Mustang now permit Flo Tek cylinder heads in multiple generations. · AS Camaro, Firebird 93-02 and GTO 04-06 add approved LS1 connecting rod part numbers to Notes. · AS Cadillac CTS-V, Chevy Camaro SS V8, Dodge Challenger, Ford Mustang GT 5.0L, Pontiac GTO allowed 11" wheels until 3/1/25. · FC F2000 Metrik ZF2 added as spec line car with Brembo 4-piston calipers and vented rotors permitted. · Chevrolet Camaro, Pontiac Firebird 70–81 Full Prep classified in AS at 3400–3600 lbs with 108.0 wheelbase, specific head castings, and suspension modifications permitted. · AS class adds fuel cell location notes to multiple Cadillac, Chevrolet, Dodge and Ford models: cells within 24 inches of standard tank. · Chevrolet Camaro 6th gen Full Prep added to AS class at 3400 lbs base or 3600 lbs with built engine. · AS class: Ford Mustang GT 05-14 Restricted prep added; Cadillac CTS-V 04-07 to 3450 lbs; Camaro/Firebird variants reconfigured with weight and notes changes; Dodge Challenger 08-20 restrictor 76mm to 80mm; Ford Mustang variants updated wei…show
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| Virginia International Raceway Runoffs 20232023-09-23 | 1:50.665Charles Russell Turner · fastest of 26 · top 5 within 2.3s-0.188s (-0.17%) | 1:51.098Franklin Futrelle · fastest of 19 · top 5 within 1.4s-20.947s (-15.86%) | 141.3Franklin Futrelle-0.6 mph (-0.4%) | 1:50.281Nolan Allaer · fastest of 11 · top 5 within 2.3s+0.386s (+0.35%) | 1:51.169Nolan Allaer · fastest of 11 · top 5 within 2.5s-16.690s (-13.05%) | 143.5Robert Allaer+2.3 mph (+1.7%) | +0.071squal -0.384s | 100.1%qual 99.7% | 2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%) | 2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%) | 154.6James Jost+3.7 mph (+2.5%) | +13.022squal +12.417s | 111.7%qual 111.2% | ||
7 rule changes (FC: 3, AS: 4)1 cars added · 1 tyres & wheels · 4 wording · 1 other · AS crate motor part number specification clarified; both CT400 P/N-19370604 and 19370604 engine assemblies permitted for GM vehicles. · AS Ford Mustang GT 5.0L (15-17) Restricted maximum wheel diameter increases to 19.0 inches. · AS Dodge Challenger 5.7L/6.1L/6.4L V8 allows alternate front upper control arms; SPC-66045 spec part removed. · AS Dodge Challenger 5.7L/6.1L/6.4L V8 now allows alternate front brake calipers with adaptor brackets for component compatibility. · FC tire marking rule clarified: four dry and four wet tires for Regional/Major/Super Tour, eight each for Runoffs; undeclared tire penalty removed. · USF2000 Van Diemen with Mazda MZR LF-DE 2.0L added to FC as spec line car; removed from FX. · FC/FF PE3-8400 ECU tune-file firmware version changes from V3.04.50 to V3.04.35.show
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| Virginia International Raceway Runoffs 20222022-09-24 | 1:50.853Charles Russell Turner · fastest of 25 · top 5 within 1.1s-0.209s (-0.19%) | 2:12.045Jason Conzo · fastest of 22 · top 5 within 1.8s+19.891s (+17.74%) | 141.9Eric Cruz-0.6 mph (-0.5%) | 1:49.895Nolan Allaer · fastest of 12 · top 5 within 1.5s-1.305s (-1.17%) | 2:07.859Nolan Allaer · fastest of 13 · top 5 within 3.8s+15.685s (+13.98%) | 141.2Tim Minor-0.6 mph (-0.4%) | -4.186squal -0.958s | 96.8%qual 99.1% | 2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%) | 2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%) | 150.9James Jost-3.0 mph (-2.0%) | -7.467squal +11.309s | 94.3%qual 110.2% | ||
14 rule changes (FC: 5, AS: 9)2 cars added · 2 weight · 1 engine · 1 tyres & wheels · 7 wording · 1 other · AS adds Hoosier W2 wet tyre option alongside R7, R6, WET/H20. · AS Dodge Challenger 08-20 gains two transmission ratio options: 2.97–0.50 or 2.26–0.63. · AS Cadillac CTS-V 6.0L V8 Restricted Prep removes 295 tire size 50 lb penalty. · FC Zetec ECU: Performance Electronics model designation changed from PE-3 to PE3-8400; monitor firmware updated to V3.04.50. · SMG Long Tube Headers: Borla PN 17237 discontinued, approved alternatives American Racing MT3-05134300LSNC or Kooks PN 11312000. · AS Mercury Capri 79-86 removed as separate spec line, merged into Ford Mustang 79-93 spec line. · AS Spec Mustang SMG Restricted Prep removes 3.73 gear ratio and 355/300 brake disc sizes. · AS Camaro, Firebird, Mustang full prep engines: alternate GM and Ford Performance cylinder heads permitted regionally with Allstar restrictor ALL26180. · FC chassis/frame section cleaned up: panels between main tubes must prevent cockpit intrusion; suspension cannot mount to exterior panels; engine/gearbox exempt from load-bearing restrictions. · FC Zetec ECU requirements clarified: Pectel T2 or PE-3 required with specified communications ports and SCCA tune-file/map from official website. · FC composite anti-intrusion panels of non-uniform thickness limited to eight fasteners per side. · FC tire marking requirements clarified: competitor must ensure tires declared, marked, and logged by Tech before qualifying or race use. · AS Chevrolet/Pontiac Camaro & Firebird 93-02 gains BMR AA004 or UMI 2310 adjustable front upper control arms. · AS Pontiac GTO 04-06 Restricted Prep minimum weight rises: LS1 to 3300 lbs, LS2 to 3350 lbs on 295 tires.show
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| Indianapolis Motor Speedway Runoffs 20212021-09-25 | 1:36.395Max Grau · fastest of 28 · top 5 within 0.7s | 1:36.655Max Grau · fastest of 28 · top 5 within 0.7s | 146.2Gray Fowler | 1:36.787Trent Walko · fastest of 31 · top 5 within 1.7s+0.451s (+0.47%) | 1:36.980Simon Sikes · fastest of 31 · top 5 within 2.0s+0.090s (+0.09%) | 141.6Tim Minor | +0.325squal +0.392s | 100.3%qual 100.4% | 1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%) | 1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%) | 153.8James Jost | +13.951squal +14.032s | 114.4%qual 114.6% | ||
15 rule changes (FC: 1, AS: 14)5 cars added · 4 weight · 2 engine · 3 wording · 1 other · AS Cadillac CTS-V 6.0L LS6 removes 295-tire 50 lb penalty. · AS consolidates seven SN95 Mustang '94-'04 spec lines into three unified lines by model year and engine. · AS Camaro/Firebird LT1 and LS1 transmission changed to TUET1 6362; Mustang GT 4.6L/5spd to TUKT16901, loses 300 lbs. · AS Camaro & Firebird and Mustang GT gear ratio specifications restored with alternate sets permitted. · AS Camaro, Firebird, Mustang, and Capri all gain 50 lbs minimum weight across seven model year variants. · AS Mustang 4.6L 5spd gains cold air intake freedom; 5.0L 6spd now requires 56mm flat plate restrictor. · AS CTS-V 5.7L LS6 and 6.0L LS2 may use Driveshaft Shop P/N GMCTSV2-C carbon fiber driveshaft. · AS Chevrolet Camaro SS V8 6.2L Restricted Prep model years extended from 10–13 to 10–15. · FC Pinto engine loses 10 lbs to 1190; Pinto aluminum head loses 10 lbs to 1190; Zetec loses 10 lbs to 1210. · AS Ford Mustang GT 5.0L 15-17 Restricted added to Spec Line with 3600 lbs minimum weight, 55mm restrictor, 18×10 wheels, 295 tires. · AS underhood bracing on stock hoods, trunks, and rear decks may be modified or removed. · AS Cadillac CTS-V 04-07 with 295 tire drops to 3450 lbs; Camaro SS V8 10-13 and Challenger 08-20 specs removed. · AS Camaro & Firebird (93-02) and Mustang GT (05-14) specifications restored with weight minimums 3250–3500 and 3350–3600 lbs respectively. · AS Dodge Challenger gains 6.1L and 6.4L V8 options; 5.7L weight rises to 3500 lbs on 295 tyres, 3600 on 315 tyres; compression to 10.9:1 max. · AS Camaro & Firebird (93-02) and Ford Mustang Coupe GT (05-14) spec lines consolidated; Camaro/Firebird now allows both LT1 and LS1 engines; Mustang now allows both 4.6L 3-valve and 5.0L 4-valve engines with restrictor.show
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| Road America Runoffs 20202020-10-02 | 2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s | 2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s | 143.4Owen McAllister | 2:12.644Robert Allaer · fastest of 13 · top 5 within 2.1s | 2:13.608Robert Allaer · fastest of 11 · top 5 within 1.2s | 142.4Robert Allaer | +0.337squal -0.162s | 100.3%qual 99.9% | 2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s | 2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s | 149.2Gregory Eaton | +14.397squal +14.239s | 110.8%qual 110.7% | ||
22 rule changes (FE2: 2, FC: 4, AS: 16)5 engine · 4 weight · 2 cars added · 1 aero · 1 suspension & brakes · 8 wording · 1 other · FC ECU maps clarified: SCCA Club or 2013 Pro map required, available on SCCA website; 1.340 restrictor reminder. · FE2 oil cooler rule clarified: Setrab 50-625-7612 or any cooler with max core 13 inches wide by 6.5 inches high allowed. · AS Dodge Challenger 5.7L V8 now requires iron block instead of aluminum, compression to 10.5:1 max, intake valve 12.7 mm, exhaust 12.3 mm, intake timing 188 degrees, exhaust timing 205 degrees. · AS Dodge Challenger 08-14 rear spoiler: 1GL20RXF replaced with 1GL20TZZAB; 82211606 still permitted. · FC Zetec engine minimum weight increases 20 lbs to 1220 lbs. · AS class pursuing specified list of eligible tires; list details unclear from text provided. · AS class tire eligibility list under development; no specifications changed yet. · AS Coyote Mustang restrictor plate under review for 2021; no change effective yet. · AS Restricted Prep 4.6 3V now permits conversion to 2 valve configuration. · AS Ford Mustang Coupe GT 4.6L 3V Restricted Prep now permits Ford Performance camshaft kit P/N M-6550-3V. · 2010-2014 Camaro remains classified in AS; no specification changes. · AS class cylinder head supplier discontinuation; replacement option pending for 2021 season. · AS Mustang, Capri, Camaro, and Firebird maximum brake rotor diameter increased from 12.2 to 13.1 inches. · unclear · AS rear trailing arms may be replaced with tubular arms maintaining stock length and axle location purpose only. · AS Ford and GM full prep cars get increased weight reduction from 150 to 200 lbs. · 05-10 Ford Mustang Coupe GT 4.6L OHC classified AS with 3200 lbs minimum weight, HR cam permitted. · 10-15 Camaro Full Prep classified AS with 3400 lbs base weight, 3700 lbs over 313 CID, specific head castings and Edelbrock heads permitted. · FC allows Eagle #CRS5483F3D connecting rods alongside original Ford; crankshaft replacement clarified to original Ford only. · FC allows Mahle #930169439 piston as new option alongside Ford original, Sealed Power #H872cp, United Engine and Machine #SO2763. · FE minimum weight rises to 1270 lbs; FE2 minimum weight rises to 1270 lbs; new spring options added; tire warmers prohibited.show
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| Virginia International Raceway Runoffs 20192019-10-05 | 1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s | 1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s | 142.6Robert Vanman | 1:51.200Robert Allaer · fastest of 10 · top 5 within 3.1s | 1:52.174Robert Allaer · fastest of 9 · top 5 within 2.7s | 141.8Robert Allaer | +0.020squal +0.138s | 100.0%qual 100.1% | 2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s | 2:03.900James Jost · fastest of 16 · top 5 within 2.1s | 153.9James Jost | +11.746squal +11.876s | 110.5%qual 110.7% | ||
6 rule changes (FC: 2, AS: 4)2 cars added · 1 weight · 3 wording · AS Spec Mustang (SMG) added as Restricted Prep class. · AS class ride height minimum clarified: five inches measured at rocker panel, excluding seams and stock effects. · AS Ford Mustang 79-93 non-Cobra drops 100 lbs to 3150; over 313 CID Cobra drops 100 lbs to 3450. · FC Wiseco piston and Crower rod part numbers updated; minimum weight unchanged at 976 grams. · AS adds Spec Mustang SMG classification with 107.1 wheelbase, 3.73 gears, 355mm front and 300mm rear brakes. · FC Wiseco piston and connecting rod minimum weight corrected to 976 grams.show
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| Sonoma Raceway Runoffs 20182018-10-10 | 1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s | 1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s | 126.8Scott Rettich | 1:32.571Timothy de Silva · fastest of 16 · top 5 within 1.8s | 1:34.053Mitch Egner · fastest of 12 · top 5 within 1.6s | 133.1Robert Armington | -1.510squal -2.469s | 98.4%qual 97.4% | 1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s | 1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s | 105.0Kevin Fandozzi | +14.782squal +12.742s | 115.5%qual 113.4% | ||
| No rule changes on record between these events | |||||||||||||||
| Indianapolis Motor Speedway Runoffs 20172017-09-25 | 1:36.336Austin McCusker · fastest of 14 · top 5 within 2.3s | 1:36.890Tim Minor · fastest of 14 · top 5 within 3.8s | 1:45.220James Jost · fastest of 29 · top 5 within 6.7s | 1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s | |||||||||||
| No rule changes on record between these events | |||||||||||||||
| Mid-Ohio Sports Car Course Runoffs 20162016-09-19 | 1:21.962John LaRue · fastest of 7 · top 5 within 2.6s | 1:22.049Nigel Saurino · fastest of 7 · top 5 within 3.0s | 1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s | 1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s | |||||||||||
| No rule changes on record between these events | |||||||||||||||
| Daytona International Speedway Runoffs 20152015-09-21 | 1:54.477Yufeng Luo · fastest of 11 · top 5 within 2.5s | 1:55.135Yufeng Luo · fastest of 10 · top 5 within 2.1s | 2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s | 2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s | |||||||||||
By track
| Track | Events | Typical % of FE2 | Best | Latest |
|---|---|---|---|---|
| Road America | 4 | 100.0% | 100.0%Runoffs 2020 | 100.0%Runoffs 2026 |
| Virginia International Raceway | 3 | 100.0% | 100.0%Runoffs 2019 | 100.0%Runoffs 2023 |
| Indianapolis Motor Speedway | 2 | 100.0%1 of 2 with FE2 | 100.0%Runoffs 2021 | 100.0%Runoffs 2021 |
| Daytona International Speedway | 1 | 0 of 1 with FE2 | ||
| Mid-Ohio Sports Car Course | 1 | 0 of 1 with FE2 | ||
| 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 FE2'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.