BoP Lab / Classes / EPx

EPx vs FC vs SM pace at every track

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

AS +B-Spec +EP +EPx×FA +vsFC ×FE2 +FF +FP +FV +FX +GT1 +GT2 +GTX +HP +P +P2 +vsSM ×SMX +SRF3 +STL +STU +T1 +T2 +T3 +T4 +Show 50 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against, 12 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

EPxFCSMsolid race · dashed qualifying · slower is lower

	Event	EPx			FC				SM
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs EPx	Qual best	Race best	Trap	vs EPx
	Road America Runoffs 20262026-09-28				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%)		2:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)	2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)	119.6Wyatt Couch+0.3 mph (+0.3%)
4 rule changes (FC: 2, SM: 2)1 weight · 1 wording · 2 othershowhide 2026-07-01 SM Rear Toe Link #40271other 2026-04-01 SM Part Number Change Request #39914wording 2026-01-01 FC F2000 MZR Spec Line Clarity/Revision Requested #38927other 2026-01-01 FC Adjust F2000 Metrik ZF2 weight #39612weight -20 lbs
	Road America Runoffs 20252025-09-29				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%)		2:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)	2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)	119.3Francisco Barroso-0.6 mph (-0.5%)
6 rule changes (FC: 2, SM: 4)2 tyres & wheels · 1 weight · 1 wording · 2 othershowhide 2025-06-01 SM SMX Data Submission - Penalties #38248other 2025-06-01 SM SMX Penaly Clarification updated language #38337wording 2025-05-01 SM Clarify Tire Marking Regs #38005tyres & wheels 2024-12-01 SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other 2024-11-01 FC 9.1.1.10.h. FC Tire Rule #36533tyres & wheels 2024-11-01 FC Change FF/FC Weight with Sequential Gearbox #36651weight
	Road America Runoffs 20242024-10-01				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%)		2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)	2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)	119.9Alex Bertagnoli-1.4 mph (-1.2%)
6 rule changes (FC: 2, SM: 4)2 weight · 1 engine · 1 suspension & brakes · 1 wording · 1 othershowhide 2024-09-01 SM SMX Camera Rule Correction #36496wording 2024-09-01 SM AIM ECU Protocol #36556engine 2024-09-01 SM OE versus OEM Definitons #36608other 2024-09-01 SM Shifter Bushing #36611suspension & brakes 2024-04-01 FC Four Pot Calipers #35481weight 2024-01-01 FC Please correct omitted punctuation #34890weight
	Virginia International Raceway Runoffs 20232023-09-23				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%)		2:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)	2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)	120.3Jim Drago+1.1 mph (+0.9%)
4 rule changes (FC: 3, SM: 1)2 weight · 1 engine · 1 tyres & wheelsshowhide 2023-07-01 FC Review FC Runoffs Tire Marking Rule #34274tyres & wheels 2023-06-01 FC USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC #34329weight 2023-01-01 FC E&O 9.1.1.B.16.j #33634engine 2023-01-01 SM BOP for NB1 and NB2 #32309weight
	Virginia International Raceway Runoffs 20222022-09-24				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%)		2:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)	2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)	119.2Jonathan Neudorf-0.6 mph (-0.5%)
6 rule changes (FC: 5, SM: 1)3 engine · 1 suspension & brakes · 1 tyres & wheels · 1 wordingshowhide 2022-07-01 FC Add Specification to Performance Electronics ECU for Ford Zetec #32761engine 2022-04-01 SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes 2022-01-01 FC Clean up Chassis/Frame section #31867engine 2021-12-01 FC Clarify Zetec ECU requirements #31554engine 2021-11-01 FC Clarify composite anti-intrusion panel language #31426wording 2021-11-01 FC Clarify tire marking requirements #31455tyres & wheels
	Indianapolis Motor Speedway Runoffs 20212021-09-25				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		1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)	1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)	119.8Kyle Greenhill
2 rule changes (FC: 1, SM: 1)1 weight · 1 othershowhide 2021-04-01 SM Updates - Obsolete Parts & BOP Parts #30438other 2021-03-01 FC Request for FC Weight Change #30171weight
	Road America Runoffs 20202020-10-02				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		2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s	2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s	121.3Kyle Greenhill
6 rule changes (FC: 4, SM: 2)3 engine · 1 induction · 1 suspension & brakes · 1 weightshowhide 2020-10-01 FC Urgent: SCCA PE3 map unsuitable #29475induction 2020-10-01 SM Radiator E&O Clarifications #29294engine 2020-08-01 FC Request for weight adjustments to equalize FC competition. #28888weight 2020-08-01 SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes 2019-12-01 FC Request for Better Zetec Connecting Rods #27710engine 2019-12-01 FC Add Alternate Piston #27795engine
	Virginia International Raceway Runoffs 20192019-10-05				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		2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s	2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s	119.8Jim Drago
6 rule changes (FC: 2, SM: 4)3 weight · 1 engine · 1 tyres & wheels · 1 wordingshowhide 2019-05-01 FC E&O Wiseco piston and Crower connecting rod #26659weight 2019-03-01 SM Request to allow aftermarket fuel filters. #26370wording 2019-02-01 SM Request 99-00 replacement Wire harnesses #25602engine 2019-02-01 SM Organize and Clarify 9.1.7.C.1.o. #25913weight 2019-02-01 SM Strike Tire Tread Language #26123tyres & wheels 2019-01-01 FC Correct Wiseco piston and connecting rod #25809weight
	Sonoma Raceway Runoffs 20182018-10-10				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		1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s	1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s	102.2Danny Steyn
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			1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s	1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s
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			1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s	1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s
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			2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s	2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s

By track

Track	Events
Road America	4
Virginia International Raceway	3
Indianapolis Motor Speedway	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.