BoP Lab / Michelin Raceway Road Atlanta

P2 vs SRF vs SMX vs STL pace at Michelin Raceway Road Atlanta

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.

Quickest here: P2 1:22.533 Lucian Pancea, Super Tour Mar 2023 qualifying · SMX 1:38.517 Jarrett Jones, Super Tour Mar 2026 qualifying · STL 1:35.976 Danny Steyn, Super Tour Mar 2022 qualifying

% of P2Lap times

P2SRFSMXSTLsolid race · dashed qualifying · slower is lower

P2SRFSMXSTLsolid 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			SRF					SMX					STL
	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
	Super Tour Mar 2026 ST26MAR062026-03-06									1:38.517Jarrett Jones · fastest of 20 · top 5 within 0.7s-0.145s (-0.15%)	1:41.144Skyler Cottrell · fastest of 21 · top 5 within 0.5s+2.379s (+2.41%)	120.7Elivan Goulart+3.7 mph (+3.2%)			1:37.000Danny Steyn · fastest of 15 · top 5 within 1.6s+0.012s (+0.01%)	1:40.349Chuck Hines · fastest of 14 · top 5 within 6.3s+2.897s (+2.97%)	126.5Derek Ketchie+6.5 mph (+5.4%)
11 rule changes (SRF: 4, SMX: 4, STL: 3)3 weight · 1 tyres & wheels · 1 wording · 6 othershowhide 2026-03-01 SRF SRF3 Spark Plugs #39899other 2026-01-01 STL Weight adjustment for STL #39579weight 2025-10-01 SRF Add HD Oil Cooler #38979other 2025-08-01 STL Lotus Weight Reduction #38772weight -50 lbs 2025-06-01 SMX SMX Data Submission - Penalties #38248other 2025-06-01 SMX SMX Penaly Clarification updated language #38337wording 2025-05-01 SMX Clarify Tire Marking Regs #38004tyres & wheels 2025-05-01 SMX SMX Data Submission Timeframe #38039other 2025-05-01 STL E&O: SMX Allowance in STL #37945weight 2025-04-01 SRF Driver Safety & Comfort #37966other 2025-04-01 SRF Update SADEV transmission specs #37992other
	Super Tour Mar 2025 ST25MAR072025-03-07									1:38.662Camden Gruber · fastest of 30 · top 5 within 0.2s-0.302s (-0.31%)	1:38.765Skyler Cottrell · fastest of 30 · top 5 within 0.5s-1.159s (-1.16%)	117.0Cam Ebben+1.0 mph (+0.9%)			1:36.988Mike Taylor · fastest of 13 · top 5 within 2.0s+0.632s (+0.66%)	1:37.452Mike Taylor · fastest of 11 · top 5 within 2.4s+0.599s (+0.62%)	120.1Derek Ketchie+1.7 mph (+1.5%)
15 rule changes (P2: 3, SRF: 6, SMX: 5, STL: 1)5 tyres & wheels · 2 engine · 2 suspension & brakes · 1 weight · 2 wording · 3 othershowhide 2024-12-01 P2 2000 cc Pinto Engine Car Weight #37187weight 2024-12-01 SMX E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other 2024-12-01 STL Request to Remove Miata Hubs from General category #37138tyres & wheels 2024-10-01 SRF Update SRF3 Air Filter Rule #36681other 2024-10-01 SRF Update SRF Brake Rotor Thickness #36687suspension & brakes 2024-10-01 SRF Hoosier Tire Decal Placement #36739tyres & wheels 2024-09-01 SMX SMX Camera Rule Correction #36496wording 2024-09-01 SMX AIM ECU Protocol #36556engine 2024-09-01 SMX OE versus OEM Definitons #36608other 2024-09-01 SMX Shifter Bushing #36611suspension & brakes 2024-09-01 SRF Protest Fee Clarification #36540wording 2024-09-01 SRF Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels 2024-08-01 SRF Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels 2024-05-01 P2 CN Spec ECU #35835engine 2024-05-01 P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels
	Super Tour Mar 2024 ST24MAR082024-03-08	1:24.228Lucian Pancea · fastest of 4 · top 4 within 5.2s+1.695s (+2.05%)	1:26.233Sherman Chao · fastest of 4 · top 4 within 17.9s+0.181s (+0.21%)	134.0Lucian Pancea-9.8 mph (-6.8%)						1:38.964Michael Tinis · fastest of 33 · top 5 within 0.5s	1:39.924Will Robusto · fastest of 33 · top 5 within 1.1s	116.0Jack Murchison	+13.691squal +14.736s	115.9%qual 117.5%	1:36.356Danny Steyn · fastest of 15 · top 5 within 3.3s-0.113s (-0.12%)	1:36.853Danny Steyn · fastest of 17 · top 5 within 2.8s-1.935s (-1.96%)	118.3Mike Taylor-5.9 mph (-4.7%)	+10.620squal +12.128s	112.3%qual 114.4%
18 rule changes (P2: 7, SRF: 6, STL: 5)4 engine · 4 tyres & wheels · 3 weight · 2 induction · 2 suspension & brakes · 1 wording · 2 othershowhide 2024-02-01 STL ST Electric-Assisted Steering Systems #35066other 2024-02-01 STL BOP Adjustments #35112weight 2024-02-01 STL Mazda 12A #35320induction 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 SRF Update SRF Rain / Brake Rule #34706suspension & brakes 2024-01-01 SRF Update SRF Brake Light Rule v1 #34853suspension & brakes 2024-01-01 SRF SRF / SRF3 Rule Updates #35268weight 2024-01-01 STL Alternate Carburetor Request for 79-85 RX7 12a #35181induction 2023-12-01 P2 Correct Table 1 for Engine Date Range Specifications #35182engine 2023-10-01 SRF SRF Radiator Rule Update #34805other 2023-06-01 SRF Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels 2023-06-01 STL Clarify STL table B - IT spec notes on Tires #34187tyres & wheels 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 SRF 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
	Super Tour Mar 2023 ST23MAR102023-03-10	1:22.533Lucian Pancea · fastest of 4 · top 4 within 4.2s-1.480s (-1.76%)	1:26.052Sherman Chao · fastest of 4 · top 4 within 15.7s+2.580s (+3.09%)	143.9Lucian Pancea-6.2 mph (-4.1%)											1:36.469Danny Steyn · fastest of 16 · top 5 within 3.9s+0.493s (+0.51%)	1:38.788Chuck Hines · fastest of 17 · top 5 within 7.5s+1.426s (+1.46%)	124.2Chuck Hines-2.2 mph (-1.7%)	+12.736squal +13.936s	114.8%qual 116.9%
11 rule changes (P2: 7, SRF: 3, STL: 1)3 tyres & wheels · 2 suspension & brakes · 2 weight · 1 cars added · 1 engine · 1 wording · 1 othershowhide 2023-03-01 SRF Update SRF Brake Rule #33469suspension & brakes 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 2023-01-01 STL Spec MX5 in STL #33473tyres & wheels 2022-06-01 SRF SRF Tire Rule Update #32614tyres & wheels 2022-06-01 SRF 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
	Super Tour Mar 2022 ST22MAR122022-03-12	1:24.013Robert Iversen · fastest of 6 · top 5 within 3.1s-3.393s (-3.88%)	1:23.472Robert Iversen · fastest of 6 · top 5 within 3.6s-2.648s (-3.07%)	150.1Robert Iversen+13.2 mph (+9.6%)											1:35.976Danny Steyn · fastest of 18 · top 5 within 2.9s-0.449s (-0.47%)	1:37.362Danny Steyn · fastest of 18 · top 5 within 1.4s+0.557s (+0.58%)	126.3Trever Degioanni+2.5 mph (+2.1%)	+13.890squal +11.963s	116.6%qual 114.2%
29 rule changes (P2: 13, SRF: 5, STL: 11)6 engine · 5 tyres & wheels · 4 weight · 3 induction · 1 aero · 1 cars added · 1 suspension & brakes · 2 wording · 6 othershowhide 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 2022-03-01 STL Single TB Weight Modifiers #31449weight 2022-03-01 STL Improved Touring Tires #32063tyres & wheels 2022-02-01 P2 E&O Engine section #31969engine 2022-01-01 P2 E&O letter #31539 – Control Area definition #31783tyres & wheels 2022-01-01 STL Throttling Device Clarification #31323induction 2022-01-01 STL Mazda Renesis Restriction #31467induction 2022-01-01 STL Clarification of 79-85 RX7 Spec line #31621wording 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 SRF Three Updates to SRF Rules #31523weight 2021-09-01 P2 P2 CN Engine Rebuild Clarification #31000engine 2021-09-01 STL Request to clean up Spec MX-5 Redundancy #31069other 2021-08-01 P2 F5 P2 Conversion #30856other 2021-08-01 P2 Clarify minimum body width requirement #30859tyres & wheels 2021-08-01 SRF SRF Wet Tires #30849tyres & wheels 2021-08-01 SRF SADEV-SRF3 Transmission #30926other 2021-08-01 SRF SRF Update Maintenance, Repairs and Seals #30961engine 2021-06-01 SRF SRF3 Alternator Pulley #30684weight 2021-06-01 STL VW Engine Request #30625engine 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 2021-05-01 STL Solstice Ride Height #30183suspension & brakes 2021-05-01 STL Request Mazda B5 DOHC #30420cars added 2021-05-01 STL Honda B16A (JDM) Restrictor change #30531induction 2021-04-01 STL ST Oil Coolers E&O Correction to 9.1.4.2.H #30388wording
	Super Tour Mar 2021 ST21MAR192021-03-19	1:27.406Lucas Mann · fastest of 4 · top 4 within 5.9s	1:26.120Lucian Pancea · fastest of 3 · top 3 within 3.8s	136.9Lucian Pancea											1:36.425Danny Steyn · fastest of 24 · top 5 within 3.0s	1:36.805Danny Steyn · fastest of 22 · top 5 within 3.1s	123.8Eric Diaz	+10.685squal +9.019s	112.4%qual 110.3%
56 earlier rule changes on record, in force before Super Tour Mar 2021 (from 2019)12 engine · 12 induction · 10 weight · 6 suspension & brakes · 4 aero · 4 tyres & wheels · 3 cars added · 2 wording · 3 othershowhide 2021-03-01 P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine 2021-03-01 SRF Mandatory identification: #30223engine 2021-03-01 STL GM Ecotec engines in STL #30247engine 2021-03-01 STL Super Touring Alternate Miata Hubs #30345tyres & wheels 2021-02-01 STL Brake Component Relocation #29990suspension & brakes 2021-02-01 STL Super Touring Wing Clarification #30111aero 2021-02-01 STL Transmission Options #30118other 2021-01-01 STL Request for FWD and RWD Parity #29728weight 2021-01-01 STL Request to Remove Honda F20C 2% Weight Penalty #29815weight 2021-01-01 STL Request for FWD and RWD Parity #30023induction 2020-12-01 P2 Balance of Performance adjustments effective 01-01-2021 #29822induction 2020-12-01 SRF SRF Shocks, Springs and Ride Height. #29688suspension & brakes 2020-12-01 STL Request clarification on wing measurement #29640aero 2020-09-01 P2 E&O clarification of P2 rear wing requirements #29205aero 2020-08-01 STL Minimum Weight Determination #27695weight 2020-08-01 STL ST Gurney flap Wicker clarification #29012aero 2020-07-01 STL Request for Addition to GT3 Approved Turbo List #27576induction 2020-06-01 P2 Classify Elan NP01 in P2 Table 1 #28812cars added 2020-06-01 STL Request to add 2016-2019 GMX-5 Spec line #28604cars added 2020-06-01 STL Request to update PN for MX-5 #28622wording 2020-06-01 STL Correction - Clarification Honda/Acura B18B engine Letter # 26209 #28873engine 2020-05-01 P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction 2020-05-01 SRF SRF Bump Stop Correction #27019suspension & brakes 2020-05-01 STL STL Honda B18 restrictor changes #28794induction 2020-04-01 P2 Add ESR inlet restrictor #27869induction 2020-04-01 STL Change GM LNF 2.0 Allowance to LSJ Engine for Viable STL 2.0 #27884engine 2020-04-01 STL Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat #28663induction 2020-04-01 STL Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53 #28664induction 2020-03-01 P2 Request for Fly by Wire Rule Wording Change #28247engine 2020-03-01 STL Request to add wheel part numbers #28342tyres & wheels 2020-01-01 P2 Request for addition of BMW Engine in P2 Engine Table #27821engine 202-01-01 SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 SRF SRF Tire Warmer Rule #27622tyres & wheels 2019-12-01 SRF SRF / SRF3 Nose Weight Reduction #27706weight 2019-12-01 SRF SRF / SRF3 Majors & Regional Class Updates #27723other 2019-10-01 P2 Update Engine Table Line E notes #27414engine 2019-10-01 STL Request to Classify Spec MX-5 Challenge in STL #27399cars added 2019-08-31 P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine 2019-07-01 P2 E&O Transmissions #27006tyres & wheels 2019-07-01 SRF SRF Dash Windscreen Kit #27028other 2019-07-01 STL Request clarification for manifold and throttle in STU #27004induction 2019-06-01 P2 Request to restrict all cars #26246weight 2019-05-31 STL Request Restrictor Plate correction #26779induction 2019-05-01 STL Request Ride Height Clarification #26597suspension & brakes 2019-03-01 P2 Change Engine Table Lines B.1 & B.5 #25777engine 2019-03-01 P2 Change Line A.1 restrictor size #26429induction 2019-03-01 STL Request to Allow VW 1.8L Engine #25614engine 2019-03-01 STL Request to reduce weight of RX8 with Renesis rotary #25781weight -100 lbs 2019-03-01 STL Request for Open Brake Pads On Mazda MX-5 Cup NC #25821suspension & brakes 2019-03-01 STL Request to clarify B18C1 GSR Honda B motor table #26209weight 2019-03-01 STL Port Matching #26415wording 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 2019-01-01 STL Request to equalize FPR Reduction on all B-Series Vtec Engines #24746weight 2019-01-01 STL Request E&O for Mazda Miata Spec Line #25955weight

About this data

Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. "% of P2" is the class's best as a share of P2's best at the same event (100% is level, less is quicker): weather and track condition move every class together, so this compares across years where the raw times do not. It still breaks when P2's own field changes or one session was wet and another dry. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.