BoP Lab / Classes / FE2

FE2 vs SRF3 vs T4 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.

Class · click a class to switch, + to compare alongside (up to 4)

AS +B-Spec +EP +FA +FC +FE2×FF +FP +FV +FX +GT1 +GT2 +GTX +HP +P +P2 +SM +SMX +vsSRF3 ×STL +STU +T1 +T2 +T3 +vsT4 ×Show 51 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: FE2 100.0% of FE2 Flinn Lazier, Sonoma Raceway Runoffs 2018 race · SRF3 107.6% of FE2 Franklin Futrelle, Virginia International Raceway Runoffs 2022 race · T4 110.1% of FE2 John Heinricy, Virginia International Raceway Runoffs 2022 race

% of FE2Lap times

FE2SRF3T4solid race · dashed qualifying · slower is lower

FE2SRF3T4solid race · dashed qualifying · each class's best lap as a share of FE2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	FE2			SRF3					T4
	Event	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%)	2:27.443Tyler Stephens · fastest of 44 · top 5 within 0.3s-0.783s (-0.53%)	2:29.257Peyton Long · fastest of 42 · top 5 within 0.3s-0.582s (-0.39%)	134.1Bobby Sak+0.4 mph (+0.3%)	+17.376squal +15.117s	113.2%qual 111.4%	2:35.876Matt Spicuzzi · fastest of 12 · top 5 within 2.4s+2.920s (+1.91%)	2:35.757Matt Spicuzzi · fastest of 12 · top 5 within 2.7s+3.124s (+2.05%)	127.6Matt Spicuzzi-6.0 mph (-4.5%)	+23.876squal +23.550s	118.1%qual 117.8%
29 rule changes (FE2: 1, SRF3: 2, T4: 26)5 cars added · 5 suspension & brakes · 5 weight · 3 induction · 2 tyres & wheels · 1 removed · 8 othershowhide 2026-09-01 T4 02-06 R53 Mini Cooper Hotchkins Rear Camber Arms #40677suspension & brakes 2026-08-01 T4 Is it time? #40653cars added 2026-08-01 T4 Combine T4 BRZ/86/FRS generations #40656weight 2026-07-01 T4 Dodge Neon DOHC Weight #40329weight 2026-06-01 T4 SPB In T4 #39973other 2026-06-01 T4 02-06 Mini Cooper S #40106weight -50 lbs 2026-06-01 T4 02-06 Mini Cooper S Fuel #40107other 2026-06-01 T4 Shock error #40176suspension & brakes 2026-06-01 T4 Max Tire Sizes #40183tyres & wheels 2026-05-01 T4 2003 Honda Civic Si Classification #39999cars added 2026-04-01 T4 16-24 ND MX5 T4 #39934suspension & brakes 2026-03-01 SRF3 SRF3 Spark Plugs #39899other 2026-03-01 T4 ND MX-5 Spec Line Rewrite Request #39802weight -100 lbs 2026-03-01 T4 4.0 Mustang spec line cleanup #39831induction 2026-02-01 T4 T4 and T3 Feedback #39230removed 2026-02-01 T4 T4 Mustang 4.0 #39489induction 2026-02-01 T4 Allow Alt Bushing Material in Toe Links #39607suspension & brakes 2026-01-01 T4 Alternate Placement of Fuse Panel and Electronics Request #39370other 2026-01-01 T4 Clarify T4 Brake Rotor Allowance #39503suspension & brakes 2025-12-01 T4 Classing 1995-99 Dodge Neon SOHC #39285cars added 2025-11-01 T4 02-06 Mini Cooper Gear Ratios #38966other 2025-11-01 T4 Reinstatement of the 2005-2010 Cobalt into T4 #38987cars added 2025-11-01 T4 Request to Classify Mercedes C230K #39080cars added 2025-11-01 T4 ND Gearset Request for T4 #39166other 2025-11-01 T4 E&O wheel size on ND #39168tyres & wheels 2025-11-01 T4 ND Spec Lines Wrong PT#'s #39170weight 2025-11-01 T4 Touring 4 Post-Runoffs BOP Adjustments and Changes #39251induction -100 lbs 2025-10-01 FE2 FE & FE2 Bubble Tail #38978other 2025-10-01 SRF3 Add HD Oil Cooler #38979other
	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%)	2:28.226Bobby Sak · fastest of 43 · top 5 within 0.6s+0.453s (+0.31%)	2:29.839Morgan Burkhard · fastest of 42 · top 5 within 0.3s+1.710s (+1.15%)	133.7Bobby Sak-1.5 mph (-1.1%)	+16.500squal +15.751s	112.4%qual 111.9%	2:32.956Matt Spicuzzi · fastest of 10 · top 5 within 3.8s-1.474s (-0.95%)	2:32.633Alex Lozano · fastest of 10 · top 5 within 4.3s-1.575s (-1.02%)	133.7Alex Lozano+4.4 mph (+3.4%)	+19.294squal +20.481s	114.5%qual 115.5%
33 rule changes (FE2: 1, SRF3: 3, T4: 29)7 weight · 5 cars added · 4 tyres & wheels · 2 engine · 2 suspension & brakes · 1 aero · 1 induction · 2 wording · 9 othershowhide 2025-09-01 SRF3 SRF Rule Updates #38853weight 2025-08-01 T4 Incorrect Touring Heading #38451wording 2025-07-01 T4 Allow B-Spec cars to run in T4 #38439other 2025-06-01 T4 T4 Mustang #38059weight -100 lbs 2025-06-01 T4 SSC tire allowance #38216tyres & wheels 2025-05-01 T4 Correct Ring and Pinion Ratio to T3, Sorry I Mean T4 3.7 V6 Stang #38041wording 2025-05-01 T4 T4 Mustang #38058aero 2025-04-01 FE2 Driver Safety & Comfort #37965other 2025-04-01 SRF3 Driver Safety & Comfort #37966other 2025-04-01 SRF3 Update SADEV transmission specs #37992other 2025-02-01 T4 Ford Mustang V6 (05-14) #37516other 2025-02-01 T4 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added 2025-01-01 T4 Remove spec lines that have expired #37269induction 2025-01-01 T4 2016-2018 Mazda Miata MX5 #37085weight -75 lbs 2024-12-01 T4 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes 2024-12-01 T4 R53 Mini Cooper S Weight Reduction Request #36612weight 2024-12-01 T4 Allowable Wheel Offset #36855tyres & wheels 2024-12-01 T4 Fuel Emissions Components #37076engine 2024-12-01 T4 2019-2024 Mazda 3 for T4 #37077cars added 2024-12-01 T4 fix brake wording #37129suspension & brakes 2024-12-01 T4 Evaporative emissions systems #37130engine 2024-12-01 T4 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other 2024-12-01 T4 Move Spec Boxster to T4 #37158cars added 2024-12-01 T4 3.7 Mustangs to T4 #37188cars added 2024-12-01 T4 BMW 320i Spec Line #37204other 2024-12-01 T4 MX5 2006-2015 NC Help #37221other 2024-12-01 T4 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added 2024-12-01 T4 Civic SI in T4 #37248weight -50 lbs 2024-12-01 T4 2006-2015 T4 NC Mx5 spec line #37278weight 2024-12-01 T4 ND MX-5 wheel allowance #37279tyres & wheels 2024-12-01 T4 T4 BOP #37281weight +75 lbs 2024-12-01 T4 Allow 7.5 #37286tyres & wheels 2024-11-01 T4 Bop Request 06-11 Honda Civic Si #37013other
	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%)	2:27.773Denny Stripling · fastest of 57 · top 5 within 0.3s-2.013s (-1.34%)	2:28.129S Sandy Satullo III · fastest of 52 · top 5 within 0.7s-2.909s (-1.93%)	135.2Denny Stripling+3.4 mph (+2.6%)	+15.381squal +16.267s	111.6%qual 112.4%	2:34.430Matt Spicuzzi · fastest of 15 · top 5 within 1.8s-2.973s (-1.89%)	2:34.208Alex Lozano · fastest of 14 · top 5 within 2.2s-3.673s (-2.33%)	129.3Alex Lozano-0.9 mph (-0.7%)	+21.460squal +22.924s	116.2%qual 117.4%
38 rule changes (SRF3: 10, T4: 28)11 weight · 8 suspension & brakes · 3 induction · 3 tyres & wheels · 2 aero · 2 cars added · 1 engine · 1 removed · 7 othershowhide 2024-10-01 SRF3 Update SRF3 Air Filter Rule #36681other 2024-10-01 SRF3 Update SRF Brake Rotor Thickness #36687suspension & brakes 2024-10-01 SRF3 Hoosier Tire Decal Placement #36739tyres & wheels 2024-09-01 SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels 2024-08-01 SRF3 Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels 2024-08-01 T4 T4 Camaro V6 weight reduction #36232weight 2024-08-01 T4 BOP adjustment for ND MX5s #36345weight -50 lbs 2024-07-01 T4 Mustang T2/T3 #35877other 2024-07-01 T4 Homologation of car to T4 #36030cars added 2024-07-01 T4 T2-T4 Driveshaft Mistake...? #36050weight 2024-07-01 T4 MINI Cooper S Spec Lines Corrections. #36086removed 2024-07-01 T4 Allow Removal of Sound Tubes #36130induction 2024-07-01 T4 B8/8.5 Audi S4 T3 and T2 #36195cars added 2024-06-01 SRF3 SRF3 Alternator Pulley Update In #36095weight 2024-06-01 T4 Allow OEM Front Spoiler 06-08 Miata in T4 #35941aero 2024-06-01 T4 T4 Mustang Weight Reduction In T4 Spec #36051weight -50 lbs 2024-06-01 T4 R53 Mini Cooper S spec line request In #36056suspension & brakes 2024-05-01 T4 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine 2024-05-01 T4 2023 ND2 Miata Classification and Allowances #35837weight 2024-05-01 T4 Errors and Omissions for 06-09 VW Rabbit Rotor #35851suspension & brakes 2024-05-01 T4 Driveshafts #35916weight 2024-05-01 T4 GCR ERROR - letter not properly applied to GCR #35999weight 2024-04-01 T4 Corrections to T4 RX8 Spec line #35767aero 2024-03-01 T4 Reorganize Spec Lines #35375induction 2024-03-01 T4 Allow any 400lb rear spring in the RX8 #35433suspension & brakes 2024-03-01 T4 370Z Brake Rotor Size Correction #35487suspension & brakes 2024-02-01 T4 More Car Lightening Stuff #35319weight 2024-02-01 T4 ND Missed Items #35352other 2024-02-01 T4 Inclusion of B-C spec cars in T4 #35374other 2024-02-01 T4 T2-T4 Set expiration dates on spec lines #35378induction 2024-01-01 SRF3 Update SRF Rain / Brake Rule #34706suspension & brakes 2024-01-01 SRF3 Update SRF Brake Light Rule v1 #34853suspension & brakes 2024-01-01 SRF3 SRF / SRF3 Rule Updates #35268weight 2024-01-01 T4 Mazda MX-5 ND1 Spec Line Request #34232weight +50 lbs 2024-01-01 T4 BRZ/FRS/86 Spring Allowance #35038suspension & brakes 2024-01-01 T4 TSX Allowance #35219other 2024-01-01 T4 Requested Update of Model Years of 370Z #35231other 2023-10-01 SRF3 SRF Radiator Rule Update #34805other
	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%)	2:03.842Morgan Burkhard · fastest of 40 · top 5 within 0.2s+0.126s (+0.10%)	2:04.911David Ogburn · fastest of 39 · top 5 within 0.3s-17.155s (-12.08%)	134.5Bobby Sak+0.1 mph (+0.0%)	+13.813squal +13.177s	112.4%qual 111.9%	2:10.514Devin Anderson · fastest of 24 · top 5 within 0.5s+0.937s (+0.72%)	2:11.962Devin Anderson · fastest of 23 · top 5 within 0.1s-13.481s (-9.27%)	127.8Raymond Blethen+0.5 mph (+0.4%)	+20.864squal +19.849s	118.8%qual 117.9%
24 rule changes (SRF3: 4, T4: 20)6 weight · 5 suspension & brakes · 4 tyres & wheels · 2 cars added · 1 induction · 2 wording · 4 othershowhide 2023-09-01 T4 Inclusion of similar car. (CLK 320) #34626other 2023-08-01 T4 Rules Clarification for Mazda RX8 Spec Line #34395weight 2023-08-01 T4 rule book corrections #34437wording 2023-08-01 T4 Ride Height Correction for the T3 Solstice. #34615suspension & brakes 2023-07-01 T4 2002-2006 Mini Cooper S R53 Spec Line Request #34336weight -50 lbs 2023-06-01 SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels 2023-06-01 T4 05-06 Mini Wheel Weight #34112weight 2023-06-01 T4 06-09 VW Rabbit #34153induction 2023-06-01 T4 96-01 Audi a4 2.8 Spring Rate #34217suspension & brakes 2023-05-01 SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels 2023-04-01 T4 Request to Classify 2004-2008 Acura TSX in T4 #33590cars added 2023-04-01 T4 T4 Mustang Brakes/Swaybar #34036suspension & brakes 2023-03-01 SRF3 Update SRF Brake Rule #33469suspension & brakes 2023-03-01 SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels 2023-03-01 T4 BMW 320I intercooler #33762other 2023-02-01 T4 2019-2021 Mazda MX5 ND2 #32027cars added 2023-02-01 T4 Mustang OEM Grill Request #33333other 2023-02-01 T4 Mazda OEM LSD was letter 32655 typo #33666wording 2023-01-01 T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line #33294suspension & brakes 2023-01-01 T4 Touring (T2-T5) Category #33617tyres & wheels 2023-01-01 T4 ENO 9.1.9.2.D.1.e.1.a. #33651other 2022-12-01 T4 T4 mustang #32789weight -25 lbs 2022-12-01 T4 Mazda OEM LSD was letter 32655 #32933weight -25 lbs 2022-10-01 T4 Another 2022 BRZ/86 T3 request #32945weight +225 lbs
	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%)	2:03.716Franklin Futrelle · fastest of 44 · top 5 within 0.6s-0.908s (-0.73%)	2:22.066Franklin Futrelle · fastest of 40 · top 5 within 1.2s+17.311s (+13.88%)	134.5David Ogburn+2.1 mph (+1.6%)	+10.021squal +12.863s	107.6%qual 111.6%	2:09.577John Heinricy · fastest of 18 · top 5 within 0.7s-1.680s (-1.28%)	2:25.443John Heinricy · fastest of 18 · top 5 within 2.5s+14.484s (+11.06%)	127.4Nick Leverone-1.5 mph (-1.2%)	+13.398squal +18.724s	110.1%qual 116.9%
32 rule changes (SRF3: 3, T4: 29)9 suspension & brakes · 6 tyres & wheels · 5 weight · 2 cars added · 2 engine · 1 induction · 1 removed · 2 wording · 4 othershowhide 2022-08-01 T4 04-09 Mazda3 Balance Shaft Delete Kit #32795other 2022-06-01 SRF3 SRF Tire Rule Update #32614tyres & wheels 2022-06-01 SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes 2022-06-01 T4 Request Wider Wheels for Hyundai Tiburon #32536tyres & wheels 2022-05-01 T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0 #32395weight 2022-05-01 T4 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes 2022-04-01 T4 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine 2022-04-01 T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V #31685other 2022-04-01 T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation #31972other 2022-04-01 T4 RX-8 Spring Part Numbers (E&O) #32151suspension & brakes 2022-04-01 T4 04-09 Mazda3 Tire Limit Clarification #32249tyres & wheels 2022-04-01 T4 Shock Part Number Errors & Omissions #32252suspension & brakes 2022-04-01 T4 Update Solo Spec Coupe to latest '20 specs for Road Racing #32262other 2022-04-01 T4 Request 2016 Mazda MX5 springs #32265suspension & brakes 2022-03-01 T4 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes 2022-03-01 T4 BRZ vs BRZ TS #32022tyres & wheels 2022-02-01 T4 MX-5 Durability Detailed #31102weight 2022-02-01 T4 Request Allowances for 2005 - 2010 Mustang #31624wording 2022-01-01 T4 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes 2022-01-01 T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class #31595weight -200 lbs 2022-01-01 T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4 #31596removed 2022-01-01 T4 Request to clarify radiator hoses #31682wording 2022-01-01 T4 Clarify Permitted/Allowed #31743suspension & brakes 2022-01-01 T4 Correct RSX wording #31746tyres & wheels 2022-01-01 T4 Camaro #31751suspension & brakes 2021-12-01 SRF3 Three Updates to SRF Rules #31523weight 2021-12-01 T4 Nissan Sentra SE-R Spec. V #30958cars added 2021-12-01 T4 Mazda RX-8 Spec Line Suspension Parts #31113induction 2021-12-01 T4 Diverter Valve Plunger Upgrade #31307engine 2021-12-01 T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity #31472tyres & wheels 2021-12-01 T4 Touring 4 BOP adjustments for 2022 #31482weight -175 lbs 2021-11-01 T4 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added
	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	1:49.520Franklin Futrelle · fastest of 84 · top 5 within 0.5s-0.304s (-0.28%)	1:50.095John Black · fastest of 82 · top 5 within 0.2s+0.313s (+0.29%)	132.1Matthew Horst	+13.440squal +13.125s	113.9%qual 113.6%	1:54.397Stephen Blethen · fastest of 47 · top 5 within 0.9s-2.169s (-1.86%)	1:55.929John Heinricy · fastest of 46 · top 5 within 1.0s-0.994s (-0.85%)	127.3Alexander Schefer	+19.274squal +18.002s	119.9%qual 118.7%
26 rule changes (SRF3: 6, T4: 20)4 tyres & wheels · 4 weight · 3 suspension & brakes · 2 cars added · 2 engine · 2 induction · 2 wording · 7 othershowhide 2021-08-01 SRF3 SRF Wet Tires #30849tyres & wheels 2021-08-01 SRF3 SADEV-SRF3 Transmission #30926other 2021-08-01 SRF3 SRF Update Maintenance, Repairs and Seals #30961engine 2021-07-01 T4 Wrong Part Number on 320i Spec Line #30645wording 2021-06-01 SRF3 SRF3 Alternator Pulley #30684weight 2021-06-01 T4 Civic Type R Brake Rotors #29817suspension & brakes 2021-05-01 T4 Mini Cooper Spec Line Anomalies #30478weight 2021-05-01 T4 Request CAI Mustang in T4 #30562induction 2021-04-01 T4 Request consistency review in GCR #30263other 2021-03-01 SRF3 Mandatory identification: #30223engine 2021-03-01 T4 E & O T4 Mustang Wheels #30245tyres & wheels 2021-02-01 T4 2021 Toyota Supra #29567cars added 2021-02-01 T4 06-15 MX-5 Durability #29781other 2021-02-01 T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-) #29838induction 2021-02-01 T4 NC MX-5 06-15 Part Number updates for 2021 #29921weight 2021-02-01 T4 BMW Z4 2.5L (03-05) Spec Line #30037weight -50 lbs 2021-02-01 T4 Sway Bars for T4 2016+ MX5 Mazda #30063suspension & brakes 2021-02-01 T4 Change part numbers on BRZ, FRS lines in T4 #30104wording 2021-02-01 T4 T4 Mustang Axle Ratio and Wheels #30149tyres & wheels 2021-01-01 T4 Request to Classify BMW M2 CS #29523cars added 2021-01-01 T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681other 2021-01-01 T4 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement #29860other 2021-01-01 T4 Cap year range on all 86s #29908other 2020-12-01 SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes 2020-12-01 T4 Alfa Romeo 4C Launch Edition #29531other 2020-12-01 T4 Post Runoffs Feedback for T4 #29752tyres & wheels -50 lbs
	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	2:29.786TJ Acker · fastest of 59 · top 5 within 0.5s	2:31.038Justin Hille · fastest of 55 · top 5 within 0.2s	131.9Charles Russell Turner	+17.767squal +16.980s	113.3%qual 112.8%	2:37.403John Heinricy · fastest of 20 · top 5 within 2.5s	2:37.881Chi Ho · fastest of 19 · top 5 within 1.6s	130.2Chi Ho	+24.610squal +24.597s	118.5%qual 118.5%
34 rule changes (FE2: 2, SRF3: 7, T4: 25)8 suspension & brakes · 6 weight · 3 cars added · 3 tyres & wheels · 1 aero · 1 engine · 5 wording · 7 othershowhide 2020-09-01 FE2 FE/FE2 Oil Cooler #29293wording 2020-08-01 T4 Scion FRS Solo Spec Coupe Gear Ratio #29021other 2020-07-01 T4 T4 RX8 bodywork clarification #28941aero 2020-07-01 T4 2006-2015 MX-5 Clarification #28942tyres & wheels 2020-07-01 T4 Request to Add a Vehicle to the Roster (contd.) #27698other 2020-06-01 SRF3 SRF Shocks #28791suspension & brakes 2020-06-01 T4 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added 2020-05-01 SRF3 Update Bump Stop Rule #28712suspension & brakes 2020-05-01 SRF3 SRF Bump Stop Correction #27019suspension & brakes 2020-05-01 T4 Request to change allowed header part # for T4 06-15 Miata #28223wording 2020-05-01 T4 Z3M Roadster Weight #28437weight 2020-03-01 T4 Request for 12-13 and 14-15 Honda Civic Springs #27848suspension & brakes 2020-03-01 T4 Request to Clarify T4 05-10 Mustang Spring Allowance #27899suspension & brakes 2020-02-01 T4 Request to Allow Brake Upgrade on T4 Mustang #27329suspension & brakes 2020-02-01 T4 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs 2020-02-01 T4 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added 2020-02-01 T4 Request for 2014-2018 Mazda 3 GT Brakes #27659suspension & brakes 2020-02-01 T4 Request to allow aftermarket OEM coolant expansion tank #27763engine 2020-02-01 T4 Request to allow aftermarket OEM power steering reservoir #27764wording 2020-02-01 T4 Request for Factory Installed Wings on Subaru BRZ #27831other 2020-02-01 T4 Request for Replacement Clutches #27892other 2020-02-01 T4 Request to Classify Chevy Sonic 1.4 In T4 #27906cars added 2020-02-01 T4 Weight Change Request for 1999 Mazda Miata #28129weight -50 lbs 2020-01-01 T4 Clarification of On-Board Fire System for T2 #27183wording 2020-01-01 T4 Mustang Ecoboost and GT Transmission #27439other 2020-01-01 T4 BRZ/FRS/86 Tire Size in T4 #27660tyres & wheels 2020-01-01 T4 NC MX5 2006-2015 Spec Adjustment Request #27739weight -75 lbs 2020-01-01 T4 T4 RX8 Classification Error #27902wording 2020-01-01 T4 Request to add Toyota 86 GT to Spec Line #27910other 202-01-01 SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 FE2 FE / FE2 Update Rules #27624weight 2019-12-01 SRF3 SRF Tire Warmer Rule #27622tyres & wheels 2019-12-01 SRF3 SRF / SRF3 Nose Weight Reduction #27706weight 2019-12-01 SRF3 SRF / SRF3 Majors & Regional Class Updates #27723other
	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	2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s	2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s	132.4Bobby Sak	+12.601squal +13.562s	111.2%qual 112.2%	2:11.257John Heinricy · fastest of 25 · top 5 within 0.2s	2:10.959Nick Leverone · fastest of 25 · top 5 within 0.6s	128.9Tommy Boileau	+18.805squal +20.195s	116.8%qual 118.2%
18 rule changes (SRF3: 3, T4: 15)4 suspension & brakes · 4 weight · 2 cars added · 1 engine · 1 induction · 1 tyres & wheels · 2 wording · 3 othershowhide 2019-08-31 T4 Request spare tire/wheel clarification #27012tyres & wheels 2019-08-31 T4 Research E&O Mazda MX5 #27112weight 2019-07-01 SRF3 SRF Dash Windscreen Kit #27028other 2019-07-01 T4 MR2 Spyder Year Correction #26936wording 2019-05-31 SRF3 New SRF Sectional Nose Rule Addition #26914other 2019-05-31 T4 Request to allow piggy back ECU on 2000 Mazda Protégé #26085engine 2019-05-31 T4 Request helper spring as optional #26678suspension & brakes 2019-05-01 SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes 2019-04-01 T4 Request to classify 2000 - 2001 BMW 323 #25096cars added 2019-03-01 T4 Correct Mazda MX-5 Hard Top Notes #26137weight 2019-03-01 T4 Consider opening class rules to allow any thermostat #26187wording 2019-03-01 T4 Cap 2016 Mazda Miata year at 2018 #26388other 2019-02-01 T4 2012-2015 Honda Civic Si Performance Request #26129suspension & brakes 2019-01-01 T4 Errors, Omissions, and Updates (Various) #22414weight 2019-01-01 T4 Request for Adjustments to fiat 124 specline #25371induction 2019-01-01 T4 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight 2019-01-01 T4 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes 2019-01-01 T4 Consider Solo SSC cross over classification into T4 #25802cars added
	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	1:46.117Robeson Clay Russell · fastest of 36 · top 5 within 0.5s	1:47.053TJ Acker · fastest of 35 · top 5 within 0.2s	110.2Steve Fogg	+11.490squal +11.077s	112.0%qual 111.7%	1:52.339Gresham Wagner · fastest of 12 · top 5 within 1.1s	1:54.030John Heinricy · fastest of 12 · top 5 within 0.2s	106.0Ross Murray	+18.467squal +17.299s	119.3%qual 118.2%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25				1:49.824John Black · fastest of 101 · top 5 within 0.5s	1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s				1:56.566Oscar Jackson · fastest of 40 · top 5 within 0.6s	1:56.923Oscar Jackson · fastest of 38 · top 5 within 1.1s
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19				1:34.363John Black · fastest of 41 · top 5 within 0.5s	1:34.947Cliff White · fastest of 39 · top 5 within 0.3s				1:38.813Jonathan Yanca · fastest of 34 · top 5 within 2.0s	1:40.397Oscar Jackson · fastest of 32 · top 5 within 0.8s
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21				2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s	2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s				2:15.886Philip Royle · fastest of 22 · top 5 within 0.9s	2:15.994Philip Royle · fastest of 20 · top 5 within 1.6s

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 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.