BoP Lab / Classes / P2

P2 pace at every track

Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), 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.

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Series Runoffs Super Tour Both

Reference · what % is measured against, 11 eventsall classes that day, as if at an average track

Tracks · untick to narrow Auto Club Speedway Barber Motorsports Park Blackhawk Farms Raceway Buttonwillow Raceway Park 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 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: P2 79.1% of the field Jeff Shafer, Mid-Ohio Sports Car Course Runoffs 2016 race

% of the fieldLap times

P2solid race · dashed qualifying · slower is lowerRoad AmericaVirginia International RacewayIndianapolis Motor SpeedwayDaytona International SpeedwayMid-Ohio Sports Car CourseSonoma Raceway

P2solid race · dashed qualifying · each class's best lap as a share of the field's at the same event (the field index, changeable above); 100% is level, less is quicker, so up the chart is quickerRoad AmericaVirginia International RacewayIndianapolis Motor SpeedwayDaytona International SpeedwayMid-Ohio Sports Car CourseSonoma Raceway

	Event	P2
	Event	Qual best	Race best	Trap	% of the field
	Road America Runoffs 20262026-09-28	2:10.606Greg Gyann · fastest of 11 · top 5 within 5.3s+3.201s (+2.51%)	2:09.441Mike Reupert · fastest of 11 · top 5 within 4.2s+1.119s (+0.87%)	155.0Matt Strand+2.4 mph (+1.6%)	82.3%qual 83.3%
1 rule change (P2: 1)1 weightshowhide 2024-12-01 2000 cc Pinto Engine Car Weight #37187weight
	Road America Runoffs 20242024-10-01	2:07.405Bart Wolf · fastest of 14 · top 5 within 3.0s-1.109s (-0.86%)	2:08.322Bart Wolf · fastest of 13 · top 5 within 0.6s-1.471s (-1.13%)	152.5Lucian Pancea-0.6 mph (-0.4%)	81.9%qual 81.7%
5 rule changes (P2: 5)4 engine · 1 tyres & wheelsshowhide 2024-05-01 CN Spec ECU #35835engine 2024-05-01 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels 2024-01-01 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine 2024-01-01 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine 2023-12-01 Correct Table 1 for Engine Date Range Specifications #35182engine
	Virginia International Raceway Runoffs 20232023-09-23	1:48.590Greg Gyann · fastest of 12 · top 5 within 1.7s+1.024s (+0.95%)	1:48.829Lucian Pancea · fastest of 11 · top 5 within 0.9s-27.005s (-19.88%)	150.9Lucian Pancea-0.2 mph (-0.2%)	79.6%qual 80.1%
8 rule changes (P2: 8)3 weight · 2 engine · 1 cars added · 1 tyres & wheels · 1 wordingshowhide 2023-05-01 Clarify minimum side body height requirement #34143tyres & wheels 2023-05-01 Clarify closed cockpit single seat car allowance #34144wording 2023-04-01 Remove redundant effective date language and update engine table #34012engine 2023-04-01 E&O - Correct dimensional equivalents #34038weight 2023-01-01 Request to Classify Sebeco NP01 #33378cars added 2023-01-01 Radical spec line clarifications #33485weight 2023-01-01 E&O original class intent #33519weight 2023-01-01 Update Engine Table Spec Line B.1 #33608engine
	Virginia International Raceway Runoffs 20222022-09-24	1:47.566Tim Day Jr · fastest of 12 · top 5 within 3.0s-1.545s (-1.42%)	2:15.834Greg Gyann · fastest of 12 · top 5 within 10.1s+25.576s (+23.20%)	151.1Robert Iversen+1.8 mph (+1.2%)	90.2%qual 79.8%
10 rule changes (P2: 10)3 tyres & wheels · 2 engine · 1 aero · 1 weight · 1 wording · 2 othershowhide 2022-05-01 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels 2022-05-01 Clean up P2 wording #32525wording 2022-04-01 After Market to Aftermarket #32373other 2022-03-01 Add spec line for Beasley B2 #32147weight 2022-03-01 E&O Table 1 spec line wing terminology #32148aero 2022-03-01 E&O class name #32196other 2022-02-01 E&O Engine section #31969engine 2022-01-01 E&O letter #31539 – Control Area definition #31783tyres & wheels 2021-12-01 BoP adjustment effective 1-1-22 #31538engine 2021-12-01 E&O clarification of "Control Area" definition #31539tyres & wheels
	Indianapolis Motor Speedway Runoffs 20212021-09-25	1:33.235Tim Day Jr · fastest of 16 · top 5 within 3.3s+1.409s (+1.53%)	1:35.322Tim Day Jr · fastest of 10 · top 5 within 4.8s+2.841s (+3.07%)	150.3Robert Iversen	80.9%qual 81.7%
8 rule changes (P2: 8)3 engine · 1 induction · 1 tyres & wheels · 3 othershowhide 2021-09-01 P2 CN Engine Rebuild Clarification #31000engine 2021-08-01 F5 P2 Conversion #30856other 2021-08-01 Clarify minimum body width requirement #30859tyres & wheels 2021-05-01 E&O tonneau cover provision in cockpit opening section #30459other 2021-05-01 Remove effective dates in Table 1 #30468other 2021-05-01 E&O Maximum Valves Per Cylinder #30560engine 2021-03-01 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine 2020-12-01 Balance of Performance adjustments effective 01-01-2021 #29822induction
	Road America Runoffs 20202020-10-02	2:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s	2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s	153.1Robert Iversen	81.8%qual 81.8%
6 rule changes (P2: 6)2 engine · 2 induction · 1 aero · 1 cars addedshowhide 2020-09-01 E&O clarification of P2 rear wing requirements #29205aero 2020-06-01 Classify Elan NP01 in P2 Table 1 #28812cars added 2020-05-01 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction 2020-04-01 Add ESR inlet restrictor #27869induction 2020-03-01 Request for Fly by Wire Rule Wording Change #28247engine 2020-01-01 Request for addition of BMW Engine in P2 Engine Table #27821engine
	Virginia International Raceway Runoffs 20192019-10-05	1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s	1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s	149.4Robert Iversen	79.6%qual 80.9%
9 rule changes (P2: 9)4 engine · 2 induction · 2 weight · 1 tyres & wheelsshowhide 2019-10-01 Update Engine Table Line E notes #27414engine 2019-08-31 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine 2019-07-01 E&O Transmissions #27006tyres & wheels 2019-06-01 Request to restrict all cars #26246weight 2019-03-01 Change Engine Table Lines B.1 & B.5 #25777engine 2019-03-01 Change Line A.1 restrictor size #26429induction 2019-01-01 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine 2019-01-01 Change CN inlet restrictor implementation date #25816induction 2019-01-01 Clarify Honda K20A-FD2 parts requirement #25950weight
	Sonoma Raceway Runoffs 20182018-10-10	1:28.784Tim Day Jr · fastest of 17 · top 5 within 5.0s	1:32.071Chuck Bona · fastest of 18 · top 5 within 0.9s	144.4Tim Day Jr	80.9%qual 81.0%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:31.826Jeff Shafer · fastest of 26 · top 5 within 4.9s	1:32.481Jeff Shafer · fastest of 24 · top 5 within 3.8s		80.2%qual 80.3%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:20.188Jeff Shafer · fastest of 18 · top 5 within 4.0s	1:20.904Jeff Shafer · fastest of 16 · top 5 within 2.2s		79.1%qual 79.4%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	1:51.825Chris Farrell · fastest of 17 · top 5 within 3.6s	1:52.355Jeff Shafer · fastest of 17 · top 5 within 2.8s		81.6%qual 82.0%

By track

Track	Events	Typical % of the field	Best	Latest
Road America	3	81.9%	81.8%Runoffs 2020	82.3%Runoffs 2026
Virginia International Raceway	3	79.6%	79.6%Runoffs 2023	79.6%Runoffs 2023
Indianapolis Motor Speedway	2	80.2%	80.2%Runoffs 2017	80.9%Runoffs 2021
Daytona International Speedway	1	81.6%	81.6%Runoffs 2015	81.6%Runoffs 2015
Mid-Ohio Sports Car Course	1	79.1%	79.1%Runoffs 2016	79.1%Runoffs 2016
Sonoma Raceway	1	80.9%	80.9%Runoffs 2018	80.9%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 the field's best on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks): the weather and the day cancel out, so one figure compares across years where lap times cannot, and across tracks too, since the class's own character at each track is taken out. A track with only one or two events on record is corrected less, since there is less to go on. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.