BoP Lab / Classes / FE
FE vs F500 vs SRF vs SMX 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 · SRF 1:37.344 Mike Miserendino, Runoffs 2016 qualifying · SMX 2:11.435 Nathan Nicholson, Runoffs 2023 qualifying
| Event | FE | F500 | SRF | SMX | ||||||||||||||||
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| 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 | 2:36.472Skyler Cottrell · fastest of 21 · top 5 within 0.4s+0.240s (+0.15%) | 2:36.414Cam Ebben · fastest of 21 · top 5 within 1.1s-0.677s (-0.43%) | 128.4Christian Hoagland-0.6 mph (-0.5%) | |||||||||||||||||
7 rule changes (FE: 2, SRF: 3, SMX: 2)2 engine · 1 cars added · 3 wording · 1 other · SRF rain/brake light part number and GCR section reference corrected for original roll hoop mounting. · SM/SMX Mazda rear toe link part number revised from 0000-04-5361426 to 0000-04-5361. · SM/SMX part number 0000-10-6900 replaced with 0000-06-5016-KT in GCR 9.1.7.C.1.j.1.c. · SRF3 spark plugs limited to NGK LTR7IX-11 P/N G301041 only; washers and sealing rings prohibited. · FE adds engine modification restrictions, testing requirements, and drivetrain violation penalties with competition suspension. · FE and FE2 Enterprise bubble tail part WM138014 now allowed; FE2 must use this configuration only. · SRF3 adds HD Oil Cooler P/N G1148500 option alongside standard P/N G480503, no fan permitted.show
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| Road America Runoffs 20252025-09-29 | 2:36.232Cam Ebben · fastest of 20 · top 5 within 0.2s+0.581s (+0.37%) | 2:37.091Michael Tinis · fastest of 19 · top 5 within 0.3s+0.813s (+0.52%) | 129.1Camden Gruber-0.4 mph (-0.3%) | |||||||||||||||||
9 rule changes (FE: 2, SRF: 2, SMX: 5)6 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… · SMX drivers must submit data acquisition files on time or face suspension and $250 fine. · SMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fines, level 2 and 4 may carry $500 fines. · SMX tire marking rules clarified: one set Toyo RR P235/40/ZR17 per weekend, impound after first dry session, damaged tires may be replaced with used only. · SMX competitors must submit AiM data files within 60 minutes instead of 30 after timed sessions. · 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. · FE must use SCCA Part # WM803010 Brake Line to Control Arm covers if used, as delivered, fastened with zip ties or tape only. · SMX OE instrument cluster must stay unmodified and connected; aftermarket dash allowed if wiring only re-routed; alternate gauges now permitted; foot pedal comfort mods allowed without relocation.show
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| Road America Runoffs 20242024-10-01 | 2:35.651Ethan Lampe · fastest of 23 · top 5 within 0.7s | 2:36.278Ethan Jacobs · fastest of 22 · top 5 within 0.7s | 129.5Michael Borden | |||||||||||||||||
19 rule changes (FE: 5, SRF: 10, SMX: 4)2 suspension & brakes · 1 engine · 1 tyres & wheels · 11 wording · 4 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. · SMX Spec MX-5 camera requirement: non-functioning recorder now will instead of may warrant penalty or disqualification. · SM and SMX must run latest AIM Data Logger Spec MX-5 ECU Protocol, effective 2024-09-01. · SMX Mazda MX-5 OE versus OEM definitions clarified in GCR section 9.1.7.1; wording change only. · SM and SMX now allow an alternate shifter bushing at the bottom of the shift lever. · 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. · 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. · 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. · SRF radiator options expanded: Enterprises P/N 480465 with baffle 480464, 480466, or Automotive 1R698 and CU698 allowed if cross-reference equivalent.show
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| Virginia International Raceway Runoffs 20232023-09-23 | 2:11.435Nathan Nicholson · fastest of 18 · top 5 within 0.6s | 2:12.616Noah Harmon · fastest of 16 · top 5 within 0.1s | 127.8Noah Harmon | |||||||||||||||||
33 rule changes (FE: 16, SRF: 17)4 tyres & wheels · 2 aero · 2 cars added · 2 engine · 2 suspension & brakes · 2 weight · 14 wording · 5 other · SRF wet front tyre changes to Hoosier P/N 46100 P185/60R13 H20 or W2 with 2.5" ground clearance. · 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. · 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. · 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. · FE engine heat shield and insulation between block and exhaust now permitted to protect fuel cell, filter, rail, lines. · 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. · 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… · 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. · 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. · FE Gurney flaps clarified: front wing secondary only at 0.500" ±0.030", rear wing at 0.250" ±0.030". · 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. · 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. · 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
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| 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 | |||||||||||||||||
6 rule changes (FE: 5, SRF: 1)3 tyres & wheels · 2 aero · 1 suspension & brakes · FE Hoosier wet rear tire width increases from 7.5 to 8.0 inches, part number 44196 W3. · 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. · 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. · FE Hoosier rain tyre part numbers updated: front 44195 W3, rear 44217 W3.show
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| 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 | |||||||||||||||||
| 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 | 1:51.573Thomas 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% | ||||||||||||||
| 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 | 1:37.344Mike 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% | ||||||||||||||
| 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 | 2:14.306Cliff 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% | ||||||||||||||
By track
| Track | Events | Typical % of FE | Best | Latest |
|---|---|---|---|---|
| Road America | 3 | 0 of 3 with FE | ||
| Virginia International Raceway | 2 | 100.0%1 of 2 with FE | 100.0%Runoffs 2019 | 100.0%Runoffs 2019 |
| Daytona International Speedway | 1 | 100.0% | 100.0%Runoffs 2015 | 100.0%Runoffs 2015 |
| Indianapolis Motor Speedway | 1 | 100.0% | 100.0%Runoffs 2017 | 100.0%Runoffs 2017 |
| 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.