BoP Lab / Classes / P2

P2 vs FM vs SRF3 vs GTL pace at every track

Lap times across years say as much about the weather as the class. % of P2 is each class's best lap as a share of P2'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: remove one to add another)

ASB-SpecEPFAFCFE2FFvsFM ×FPFVFXGT1GT2vsGTL ×GTXHPPP2×SMSMXvsSRF3 ×STLSTUT1T2T3T4Show 49 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: P2 100.0% of P2 Jeff Shafer, Daytona International Speedway Runoffs 2015 race · FM 105.1% of P2 Joseph Burton-Harris, Daytona International Speedway Runoffs 2015 race · SRF3 104.6% of P2 Franklin Futrelle, Virginia International Raceway Runoffs 2022 race · GTL 103.9% of P2 Michael Lewis, Virginia International Raceway Runoffs 2022 race

% of P2Lap times

P2FMSRF3GTLsolid race · dashed qualifying · slower is lower

P2FMSRF3GTLsolid race · dashed qualifying · each class's best lap as a share of P2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	P2			FM					SRF3					GTL
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs P2	% of P2	Qual best	Race best	Trap	vs P2	% of P2	Qual best	Race best	Trap	vs P2	% of P2
	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%)						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%)	+19.816squal +16.837s	115.3%qual 112.9%
3 rule changes (SRF3: 2, GTL: 1)1 removed · 2 othershowhide 2026-03-01 GTL Remove GT3U from GCR as it is now in STU #39862removed 2026-03-01 SRF3 SRF3 Spark Plugs #39899other 2025-10-01 SRF3 Add HD Oil Cooler #38979other
	Road America Runoffs 20252025-09-29									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%)
7 rule changes (P2: 1, SRF3: 3, GTL: 3)3 weight · 1 aero · 1 engine · 2 othershowhide 2025-09-01 SRF3 SRF Rule Updates #38853weight 2025-04-01 SRF3 Driver Safety & Comfort #37966other 2025-04-01 SRF3 Update SADEV transmission specs #37992other 2025-01-01 GTL Correct language regarding OEM Areo Devices #37137aero 2024-12-01 P2 2000 cc Pinto Engine Car Weight #37187weight 2024-11-01 GTL G16E-GTS Fuel Injection Spec Line Change #36588engine 2024-11-01 GTL GTL Alternate Weight and Choke Option for L16 engine #36653weight
	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%)						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%)	+19.807squal +20.368s	115.4%qual 116.0%	2:30.858Peter Shadowen · fastest of 14 · top 5 within 4.4s-1.085s (-0.71%)	2:30.844Chris Bovis · fastest of 13 · top 5 within 3.7s-0.757s (-0.50%)	133.3Peter Shadowen+1.8 mph (+1.4%)	+22.522squal +23.453s	117.6%qual 118.4%
31 rule changes (P2: 5, SRF3: 10, GTL: 16)9 engine · 5 cars added · 5 weight · 4 tyres & wheels · 3 suspension & brakes · 2 induction · 1 aero · 2 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 GTL Request to Include Toyota GR86 in GTL #36324cars added 2024-09-01 GTL Inclusion of Modified Spec Miata for GTL competition #36325cars added 2024-09-01 GTL Include Mazda MX5 RF 2017- in GTL #36428cars added 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 2024-07-01 GTL Add GTL to GT3 choke option line. #36236induction 2024-06-01 SRF3 SRF3 Alternator Pulley Update In #36095weight 2024-05-01 GTL Request for Spec Line 1010 Reconsideration #35009weight +300 lbs 2024-05-01 GTL Allow 34 mm chokes for the Datsun 510 #35661induction +50 lbs 2024-05-01 P2 CN Spec ECU #35835engine 2024-05-01 P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels 2024-02-01 GTL Rear Blade Spoiler Clarification #35261aero 2024-02-01 GTL GT Direct Injection allowance and rules #35437engine 2024-02-01 GTL GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine 2024-01-01 GTL Rotary Engine 12A Rotor Housings #35131engine 2024-01-01 GTL Request to Include Toyota GR86 in GTL #35198cars added 2024-01-01 GTL Errors and Omissions, GTL engines & Cars #35226engine 2024-01-01 P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine 2024-01-01 P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine 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 2023-12-01 GTL Small Engines in GT Lite #34842engine 2023-12-01 GTL Request to Classify Honda Fit body in GTL #35020cars added 2023-12-01 GTL Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight 2023-12-01 P2 Correct Table 1 for Engine Date Range Specifications #35182engine 2023-11-01 GTL Weight for Nissan Sentra/200SX A 1400's #34918weight -50 lbs 2023-10-01 SRF3 SRF Radiator Rule Update #34805other
	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%)						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%)	+16.082squal +15.252s	114.8%qual 114.0%	2:09.564Peter Shadowen · fastest of 11 · top 5 within 4.9s+1.775s (+1.39%)	2:11.277Graham Fuller · fastest of 10 · top 5 within 2.4s-9.903s (-7.01%)	142.7Peter Shadowen+6.7 mph (+4.9%)	+22.448squal +20.974s	120.6%qual 119.3%
19 rule changes (P2: 8, SRF3: 4, GTL: 7)5 engine · 5 weight · 4 tyres & wheels · 2 cars added · 1 induction · 1 suspension & brakes · 1 wordingshowhide 2023-06-01 SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels 2023-05-01 GTL Please classify Fields Cardinal V8 #33784cars added 2023-05-01 P2 Clarify minimum side body height requirement #34143tyres & wheels 2023-05-01 P2 Clarify closed cockpit single seat car allowance #34144wording 2023-05-01 SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels 2023-04-01 P2 Remove redundant effective date language and update engine table #34012engine 2023-04-01 P2 E&O - Correct dimensional equivalents #34038weight 2023-03-01 SRF3 Update SRF Brake Rule #33469suspension & brakes 2023-03-01 SRF3 Update SRF Bodywork Fitment Rule #33765tyres & wheels 2023-02-01 GTL Toyota 4Y Engine Classification Request #33562engine 2023-01-01 GTL Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine 2023-01-01 P2 Request to Classify Sebeco NP01 #33378cars added 2023-01-01 P2 Radical spec line clarifications #33485weight 2023-01-01 P2 E&O original class intent #33519weight 2023-01-01 P2 Update Engine Table Spec Line B.1 #33608engine 2022-12-01 GTL Fiat HP Limited Prep X1/9 Weight in GTL #33297weight 2022-12-01 GTL GT2 (TA2)/GTA Part Number Update #33315induction 2022-12-01 GTL Request to add Ford Festiva to GTL #33335weight 2022-11-01 GTL Engine Request #33064engine
	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%)						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%)	+6.232squal +16.150s	104.6%qual 115.0%	2:07.789Peter Shadowen · fastest of 14 · top 5 within 2.2s+0.792s (+0.62%)	2:21.180Michael Lewis · fastest of 13 · top 5 within 2.1s+13.343s (+10.44%)	136.0Peter Shadowen+4.9 mph (+3.7%)	+5.346squal +20.223s	103.9%qual 118.8%
16 rule changes (P2: 10, SRF3: 3, GTL: 3)4 tyres & wheels · 2 cars added · 2 engine · 2 suspension & brakes · 2 weight · 1 aero · 1 wording · 2 othershowhide 2022-09-01 GTL Tail lights on all GT category race cars. #32799suspension & brakes 2022-06-01 SRF3 SRF Tire Rule Update #32614tyres & wheels 2022-06-01 SRF3 Brake, seal, and air filter clarifications #32670suspension & brakes 2022-05-01 P2 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels 2022-05-01 P2 Clean up P2 wording #32525wording 2022-04-01 P2 After Market to Aftermarket #32373other 2022-03-01 GTL Request to Classify Ginetta G40 in GTL #31599cars added 2022-03-01 P2 Add spec line for Beasley B2 #32147weight 2022-03-01 P2 E&O Table 1 spec line wing terminology #32148aero 2022-03-01 P2 E&O class name #32196other 2022-02-01 P2 E&O Engine section #31969engine 2022-01-01 P2 E&O letter #31539 – Control Area definition #31783tyres & wheels 2021-12-01 P2 BoP adjustment effective 1-1-22 #31538engine 2021-12-01 P2 E&O clarification of "Control Area" definition #31539tyres & wheels 2021-12-01 SRF3 Three Updates to SRF Rules #31523weight 2021-10-01 GTL Request car classification #31032cars added
	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						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	+14.773squal +16.285s	115.5%qual 117.5%	1:51.819Christopher Bovis · fastest of 22 · top 5 within 1.8s+1.488s (+1.35%)	1:51.952Scott Twomey · fastest of 19 · top 5 within 1.7s-0.116s (-0.10%)	129.5Brian Linn	+16.630squal +18.584s	117.4%qual 119.9%
22 rule changes (P2: 8, SRF3: 6, GTL: 8)6 engine · 3 tyres & wheels · 3 weight · 2 induction · 1 cars added · 1 suspension & brakes · 1 wording · 5 othershowhide 2021-09-01 P2 P2 CN Engine Rebuild Clarification #31000engine 2021-08-01 GTL Request to Update GTA Obsolete Part Numbers #30615wording 2021-08-01 P2 F5 P2 Conversion #30856other 2021-08-01 P2 Clarify minimum body width requirement #30859tyres & wheels 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 GTL Request clarification for the Honda B18a,bVS B18c #30482weight 2021-07-01 GTL Request to Allow Hood Bulge on Nissan B13 Sentra #30504other 2021-07-01 GTL Request BMW E21 Classing #30582tyres & wheels 2021-06-01 SRF3 SRF3 Alternator Pulley #30684weight 2021-05-01 P2 E&O tonneau cover provision in cockpit opening section #30459other 2021-05-01 P2 Remove effective dates in Table 1 #30468other 2021-05-01 P2 E&O Maximum Valves Per Cylinder #30560engine 2021-03-01 GTL Request for Help for Mazda 12A #29754weight +50 lbs 2021-03-01 P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine 2021-03-01 SRF3 Mandatory identification: #30223engine 2021-02-01 GTL Request LP HP Fiat X1/9 & Bertone 1500 to GTL #30058cars added 2021-01-01 GTL Please Add GTL Nissan 1.8L Engine MRA8DE #29805engine 2021-01-01 GTL Increase 13b SIR size #29867induction 2020-12-01 P2 Balance of Performance adjustments effective 01-01-2021 #29822induction 2020-12-01 SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakes
	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						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	+21.245squal +21.272s	116.4%qual 116.6%	2:31.943Chris Bovis · fastest of 14 · top 5 within 6.3s	2:31.601Peter Shadowen · fastest of 14 · top 5 within 7.2s	131.4Peter Shadowen	+21.808squal +23.429s	116.8%qual 118.2%
30 rule changes (P2: 6, SRF3: 7, GTL: 17)8 aero · 6 induction · 4 cars added · 4 suspension & brakes · 3 weight · 2 engine · 1 tyres & wheels · 2 othershowhide 2020-09-01 GTL GT Category Wording #29193induction 2020-09-01 P2 E&O clarification of P2 rear wing requirements #29205aero 2020-08-01 GTL Request to change the Mazda 13b restrictor size #28518induction +175 lbs 2020-07-01 GTL Request to classify 1999-2007 Toyota MR2 Spyder body #28870cars added 2020-07-01 GTL TA2 Gurney flap wicker clarification #28874aero 2020-07-01 GTL STO Gurney flap wicker clarification #28883aero 2020-07-01 GTL GT Gurney flap wicker clarification #28909aero 2020-07-01 GTL Mazda 13b Restrictor Size Follow up to Letter 28518 #29015induction 2020-06-01 GTL Stall Test #28709induction 2020-06-01 P2 Classify Elan NP01 in P2 Table 1 #28812cars added 2020-06-01 SRF3 SRF Shocks #28791suspension & brakes 2020-05-01 GTL GTL Wing Rule #28754aero 2020-05-01 P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction 2020-05-01 SRF3 Update Bump Stop Rule #28712suspension & brakes 2020-05-01 SRF3 SRF Bump Stop Correction #27019suspension & brakes 2020-04-01 P2 Add ESR inlet restrictor #27869induction 2020-03-01 GTL Wing Mounting Upright Size #27641aero 2020-03-01 GTL Wing Mounting Upright Size #27641aero 2020-03-01 GTL GTL wing end plates addition #28243aero 2020-03-01 GTL Clarification to letter #27406 #28309weight -50 lbs 2020-03-01 P2 Request for Fly by Wire Rule Wording Change #28247engine 2020-02-01 GTL Windshield Clips #27323other 2020-01-01 GTL Request Factory Five Daytona coupe classification #26308cars added 2020-01-01 GTL Request to Classify the MK1 two door Jetta #27648cars added 2020-01-01 P2 Request for addition of BMW Engine in P2 Engine Table #27821engine 202-01-01 SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 GTL 88-91 Honda CRX Spec Line Correction #27233weight 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	1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s	1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s	149.4Robert Iversen	1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s	2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s	135.7Bryce Cornet	+25.558squal +6.013s	123.2%qual 105.5%	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	+14.497squal +15.513s	113.1%qual 114.2%	2:06.997Peter Shadowen · fastest of 19 · top 5 within 4.0s	2:07.837Bill Ball · fastest of 18 · top 5 within 4.2s	131.1Peter Shadowen	+17.579squal +17.886s	115.9%qual 116.4%
25 rule changes (P2: 9, SRF3: 3, GTL: 13)6 engine · 6 weight · 4 cars added · 3 induction · 2 suspension & brakes · 2 tyres & wheels · 2 othershowhide 2019-10-01 P2 Update Engine Table Line E notes #27414engine 2019-08-31 GTL Fun Cup Beetle #27334weight 2019-08-31 P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine 2019-08-01 GTL GTL #26960weight 2019-07-01 GTL Request CRZ wheelbase change #26896tyres & wheels 2019-07-01 P2 E&O Transmissions #27006tyres & wheels 2019-07-01 SRF3 SRF Dash Windscreen Kit #27028other 2019-06-01 P2 Request to restrict all cars #26246weight 2019-05-31 SRF3 New SRF Sectional Nose Rule Addition #26914other 2019-05-01 GTL Request to Classify VW Fun Cup Beetle #25986cars added 2019-05-01 GTL Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GTL Request to Classify Ligier JS2 R #26535cars added 2019-05-01 GTL Request for GTL Mazda 13B SIR Increase with Penalty #26572engine 2019-05-01 SRF3 SRF Brakes and Shock Rule Changes #26629suspension & brakes 2019-04-01 GTL Request Ride Height Clarification #26600suspension & brakes 2019-03-01 GTL Request Mazda 12a Rotary SIR Increase #26081induction 2019-03-01 GTL Request to Classify Mustang 2 Body in GTL #26222cars added 2019-03-01 P2 Change Engine Table Lines B.1 & B.5 #25777engine 2019-03-01 P2 Change Line A.1 restrictor size #26429induction 2019-01-01 GTL Request for GTL Mini Adjustments #25754weight 2019-01-01 GTL BMC thru Rover Group remove long inactive mini #25771weight 2019-01-01 GTL GTX Homologation table update #26034cars added 2019-01-01 P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine 2019-01-01 P2 Change CN inlet restrictor implementation date #25816induction 2019-01-01 P2 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	1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s	1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s	124.1Melvin David Kemper Jr	+5.838squal +8.814s	106.3%qual 109.9%	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	+14.982squal +17.333s	116.3%qual 119.5%	1:47.885Troy Ermish · fastest of 20 · top 5 within 4.5s	1:49.458Troy Ermish · fastest of 19 · top 5 within 3.6s	109.3Charles Leonard	+17.387squal +19.101s	118.9%qual 121.5%
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		1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s	1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s		+8.665squal +9.405s	109.4%qual 110.2%	1:49.824John Black · fastest of 101 · top 5 within 0.5s	1:49.782Tray Ayres · fastest of 94 · top 5 within 0.4s		+17.301squal +17.998s	118.7%qual 119.6%	1:50.331Christopher Bovis · fastest of 26 · top 5 within 1.5s	1:52.068Christopher Bovis · fastest of 20 · top 5 within 1.0s		+19.587squal +18.505s	121.2%qual 120.2%
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		1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s	1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s		+7.018squal +5.855s	108.7%qual 107.3%	1:34.363John Black · fastest of 41 · top 5 within 0.5s	1:34.947Cliff White · fastest of 39 · top 5 within 0.3s		+14.043squal +14.175s	117.4%qual 117.7%	1:35.377Wilson Wright · fastest of 28 · top 5 within 1.2s	1:35.912Kyle Disque · fastest of 28 · top 5 within 1.1s		+15.008squal +15.189s	118.6%qual 118.9%
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		1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s	1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s		+5.674squal +5.979s	105.1%qual 105.3%	2:08.557Kerry Jacobsen · fastest of 29 · top 5 within 1.1s	2:10.215Chad Galloway · fastest of 29 · top 5 within 0.3s		+17.860squal +16.732s	115.9%qual 115.0%	2:11.387Jim Dentici · fastest of 10 · top 5 within 2.2s	2:13.564Jim Dentici · fastest of 9 · top 5 within 2.0s		+21.209squal +19.562s	118.9%qual 117.5%

By track

Track	Events	Typical % of P2	Best	Latest
Road America	4	100.0%3 of 4 with P2	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%	100.0%Runoffs 2017	100.0%Runoffs 2021
Daytona International Speedway	1	100.0%	100.0%Runoffs 2015	100.0%Runoffs 2015
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 P2'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.