BoP Lab / Classes / SPU

SPU vs BSpec vs SSM vs FA pace at every track

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)

ASB-SpecvsBSpec ×EPvsFA ×FCFE2FFFPFVFXGT1GT2GTXHPPP2SMSMXSPU×SRF3vsSSM ×STLSTUT1T2T3T4Show 48 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against, 11 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 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

SPUBSpecSSMFAsolid race · dashed qualifying · slower is lower

	Event	SPU			BSpec				SSM				FA
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs SPU	Qual best	Race best	Trap	vs SPU	Qual best	Race best	Trap	vs SPU
	Road America Runoffs 20262026-09-28												2:02.513Dudley Fleck · fastest of 9 · top 5 within 6.9s+1.590s (+1.31%)	2:03.334James French · fastest of 10 · top 5 within 1.4s+0.680s (+0.55%)	158.6John McAleer+1.5 mph (+1.0%)
7 rule changes (FA: 7)3 induction · 2 engine · 1 weight · 1 othershowhide 2026-08-01 FA Update sealed engine teardown section #40621engine 2026-06-01 FA Motor Classification #40175weight 2026-02-01 FA Pro Mazda Classification and Performance Enhancement Proposal #39411induction 2026-01-01 FA Alternate Intake Manifold for MZR #38223induction 2026-01-01 FA Engine Compression Rule Change Request #39302engine 2026-01-01 FA Change Formula 1000 allowances #39608induction 2025-11-01 FA Re-Consider USF Pro 2000 Car for Formula Atlantic Class #38783other
	Road America Runoffs 20252025-09-29												2:00.923Hans Peter · fastest of 12 · top 5 within 2.4s-0.637s (-0.52%)	2:02.654Hans Peter · fastest of 11 · top 5 within 3.1s+0.864s (+0.71%)	157.0Shane Kennett-3.0 mph (-1.9%)
3 rule changes (FA: 3)2 tyres & wheels · 1 cars addedshowhide 2025-07-01 FA Ligier JS F3 Tire Choice #38434tyres & wheels 2025-03-01 FA Update Formula Renault 2.0 spec line notes #37853tyres & wheels 2025-02-01 FA Classify FR European Championship car as spec line car in Table 2 #37658cars added
	Road America Runoffs 20242024-10-01												2:01.560Hans Peter · fastest of 13 · top 5 within 2.0s-2.714s (-2.18%)	2:01.790Dudley Fleck · fastest of 12 · top 5 within 3.3s-2.956s (-2.37%)	160.0Brandon Schwarz+9.4 mph (+6.3%)
7 rule changes (FA: 7)2 induction · 2 tyres & wheels · 1 engine · 1 weight · 1 othershowhide 2023-06-01 FA Simplify Pro Formula Mazda wheel allowance #34190tyres & wheels 2023-05-01 FA E&O - Correct Pro Formula Mazda spec line dimensional equivalent #34085tyres & wheels 2023-05-01 FA Add new spec line for MSR Formula Mazda FMzR to Table 2 #34139other 2023-01-01 FA BDA Displacement #33431engine 2022-12-01 FA Reclassify 2010-2017 Formula Renault 2.0 as a spec line car in FA #33395weight 2022-12-01 FA Change Swift 016 2.3L restrictor size and minimum weight #33472induction -30 lbs 2022-10-01 FA Pro Formula Mazda Dimension E&O #33160induction
	Virginia International Raceway Runoffs 20222022-09-24												1:44.703Chip Romer · fastest of 7 · top 5 within 4.0s+3.158s (+3.11%)	1:48.507Alex Mayer · fastest of 4 · top 4 within 4.2s+5.400s (+5.24%)	154.6Austin Hill-1.4 mph (-0.9%)
7 rule changes (FA: 7)3 engine · 1 aero · 1 tyres & wheels · 1 weight · 1 othershowhide 2022-05-01 FA Update FR Americas rulebook requirement #32491engine 2022-05-01 FA Clarify verification of sealed engine compliance #32522engine 2022-05-01 FA Clarify Formula Lites and FR Americas sealed engine requirement #32523engine 2022-04-01 FA E&O FA Transmission section #32251tyres & wheels 2022-04-01 FA E&O Swift 016 2.5 liter Aero column #32363aero 2022-03-01 FA Closing the Gap #31934other 2022-02-01 FA Reorganize Tables 1 and 2 #31985weight
	Indianapolis Motor Speedway Runoffs 20212021-09-25												1:29.701James French · fastest of 18 · top 5 within 2.7s-0.256s (-0.28%)	1:30.650James French · fastest of 17 · top 5 within 6.1s-0.715s (-0.78%)	155.5James French
22 rule changes (FA: 22)6 engine · 6 weight · 2 induction · 2 removed · 1 cars added · 1 tyres & wheels · 1 wording · 3 othershowhide 2021-09-01 FA E&O Table 2 engine names #31085engine 2021-08-01 FA Move Toyota 1800 to Table 2 #30822removed 2021-08-01 FA E&O Swift 016 wheel width reference #30939tyres & wheels 2021-07-01 FA Update FA rules package #30717engine 2021-07-01 FA Move Mazda MZR/Ford Duratec 2296cc and 2500cc to Table 2 #30718removed 2021-07-01 FA Clean up Table 2 Mazda MZR 2.0L and Honda Civic K20Z3 spec lines #30719other 2021-06-01 FA E&O Mazda MZR 2.0 and Honda Civic K20Z3 chassis eligibility #30632other 2021-05-01 FA Correct engine name in Swift 016 2.3 liter spec line #30447engine 2021-05-01 FA Correct engine name in Swift 016 2.5 liter spec line #30448engine 2021-05-01 FA Revise Table 1 Spec Lines and clarify application of Engine Notes #30456engine 2021-04-01 FA Update Table 1 Weights for Spec Lines C, I, and K #30355weight -25 lbs 2021-04-01 FA Remove redundant reference in Table 2 spec line #30366weight 2021-04-01 FA Correct the name of the FR Americas car #30369wording 2021-04-01 FA Clean up Spec Line D in Table 1 #30372weight 2021-04-01 FA Table 2 Honda K20Z3 request #30386induction 2021-03-01 FA E&O FA Intake Restrictors #30273induction 2021-03-01 FA Clean up Spec Lines A and B in Table 1 #30274weight 2021-03-01 FA Clean up Spec Line C in Table 1 #30275weight 2021-03-01 FA Clean up Spec Lines J and L in Table 1 #30276weight 2021-03-01 FA Move engine specifications to Pro Formula Mazda spec line notes #30278engine 2021-03-01 FA Update F3 Americas spec line #30280other 2021-01-01 FA Request to classify Formula Lites Crawford FL15 #29702cars added
	Road America Runoffs 20202020-10-02												2:04.274Spencer Brockman · fastest of 11 · top 5 within 2.7s	2:04.746Spencer Brockman · fastest of 10 · top 5 within 2.4s	150.6Hans Peter
15 rule changes (FA: 15)4 engine · 2 induction · 2 tyres & wheels · 2 weight · 1 aero · 1 removed · 3 othershowhide 2020-07-01 FA Request to Adjust FB Weight for Stock Engines #29005weight 2020-06-01 FA E&O permitted engine modifications #28831engine 2020-06-01 FA E&O Transmissions #28832other 2020-06-01 FA Swift 016 Gurney flap wicker clarification #28884aero 2020-05-01 FA Remove redundant spec line in Table 1 #28720removed 2020-05-01 FA E&O general engine rules #28772engine 2020-04-01 FA Request higher compression ratio and prior weights for F1000 cars #28162engine 2020-04-01 FA Remove redundant wheel dimension provisions #28554tyres & wheels 2020-04-01 FA E&O Formula 3 spec line #28596induction 2020-03-01 FA FA weight correction/clarification #28430engine 2020-01-01 FA Request to merge FB into FA #25611weight 2020-01-01 FA Suggestions for FB/F1000 into FA #27319other 2020-01-01 FA Change Swift 016 - 2.3 liter Mazda Duratec restrictor size #27880induction 2019-12-01 FA Move wheel dimensions from Bodywork subsection to #27493tyres & wheels 2019-12-01 FA Table 2 Mazda MZR 2.0 E&O #27640other
	Virginia International Raceway Runoffs 20192019-10-05												1:41.545Dario Cangialosi · fastest of 8 · top 5 within 2.8s	1:43.107Dario Cangialosi · fastest of 8 · top 5 within 1.8s	155.9Kent Vaccaro
7 rule changes (FA: 7)3 weight · 2 engine · 1 removed · 1 othershowhide 2019-10-01 FA Follow up to Letter #27344 on Honda Powered FA Rules #27363removed 2019-08-31 FA Swift 014 Mazda MZR 2.0 E&O #27305weight 2019-05-31 FA Adjust Line N restrictor size and minimum weight #26691weight +30 lbs 2019-05-01 FA Add data plate requirement #26707other 2019-03-01 FA Request to add FA engine spec lines #26183engine 2019-02-01 FA FA MZR 2.0 Engine Specification #25814engine 2019-02-01 FA FA 016 weight increase #26063weight
	Sonoma Raceway Runoffs 20182018-10-10												1:28.176Mirl Swan · fastest of 7 · top 5 within 4.0s	1:29.924Mirl Swan · fastest of 7 · top 5 within 2.6s	144.8Antony Opheim
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25												1:29.957Sedat Yelkin · fastest of 12 · top 5 within 2.3s	1:31.365Keith Grant · fastest of 12 · top 5 within 1.0s
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19												1:14.920Ryan Norman · fastest of 5 · top 5 within 7.0s	1:19.009Ryan Norman · fastest of 5 · top 5 within 4.7s
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21												1:47.758Tyler Hunter · fastest of 10 · top 5 within 3.7s	1:48.162Tyler Hunter · fastest of 8 · top 5 within 5.3s

By track

Track	Events
Road America	4
Indianapolis Motor Speedway	2
Virginia International Raceway	2
Daytona International Speedway	1
Mid-Ohio Sports Car Course	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.