BoP Lab / Michelin Raceway Road Atlanta
P1 vs SM vs SMSE vs SRF3 pace at Michelin Raceway Road Atlanta
Quickest here: P1 1:17.524 Chip Romer, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta race · SM 1:41.798 Danny Steyn, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta qualifying · SRF3 1:33.550 Peyton Long, Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta qualifying
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs P1 | % of P1 | Qual best | Race best | Trap | vs P1 | % of P1 | Qual best | Race best | Trap | vs P1 | % of P1 | |||
| Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta ST26MAR062026-03-06 | 1:42.324Skyler Cottrell · fastest of 52 · top 5 within 0.4s-0.524s (-0.51%) | 1:42.611Charles Mactutus · fastest of 51 · top 5 within 0.2s-0.014s (-0.01%) | 112.2James Newell+5.2 mph (+4.9%) | 1:33.550Peyton Long · fastest of 51 · top 5 within 0.3s-0.053s (-0.06%) | 1:34.016Robeson Clay Russell · fastest of 50 · top 5 within 0.4s+0.231s (+0.25%) | 129.9Grant Vogel+7.5 mph (+6.2%) | ||||||||||||||
8 rule changes (SM: 3, SRF3: 5)7 wording · 1 other · SRF3 spark plugs restricted to NGK LTR7IX-11 P/N G301041 only, washers and sealing rings prohibited. · SRF3 adds HD Oil Cooler P/N G1148500 as alternative to standard cooler P/N G480503. · SRF3 brakes restructured: Hawk Blue 801993 pads, Wilwood 800065 rotors only; adds Girling 880358, Wilwood 880357, Tilton 880360 master cylinders. · SMX drivers must submit data acquisition files on time or face suspension and $250 fine. · SMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fine; level 2 and 4 may carry $500 fine. · SM cars limited to one set of Hoosier SM 7.5 P205/50/ZR17 per Super Tour event weekend for dry sessions. · SRF drivers with disabilities may modify seat and controls for safety and comfort with approval and logbook notation. · SRF SADEV-SRF3 6-speed sequential transmission gear ratios wording clarified, effective 2025-04-01.show
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| Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta ST25MAR072025-03-07 | 1:42.848Sean Noonan · fastest of 35 · top 5 within 0.2s+0.228s (+0.22%) | 1:42.625Sean Noonan · fastest of 33 · top 5 within 0.6s-0.370s (-0.36%) | 107.0Sean Noonan+1.8 mph (+1.7%) | 1:33.603Peyton Long · fastest of 40 · top 5 within 0.5s-0.354s (-0.38%) | 1:33.785Richard Baldwin · fastest of 40 · top 5 within 0.1s-0.388s (-0.41%) | 122.4Arvid Albanese+0.2 mph (+0.1%) | ||||||||||||||
12 rule changes (P1: 1, SM: 5, SRF3: 6)1 suspension & brakes · 1 tyres & wheels · 1 weight · 9 wording · SMX allows OE instrument cluster relocation for aftermarket dash mounting, with wiring re-routed only; alternate gauges now permitted. · SRF3 air filter rule removes K&N RC-9160 option, leaving only P/N WM301020 allowed. · SRF brake rotor minimum thickness increases from 12.20mm to 13.25mm, Wilwood vented rotor P/N 800065. · SRF3 Hoosier logo placement changes from four decals to three decals in different locations. · SMX Spec MX-5 camera requirement wording changed; non-functioning recorder now grounds for penalty or disqualification. · SMX Spec MX-5 must run latest AIM Data Logger Spec MX-5 ECU Protocol; wording clarification for technical compliance. · SMX Mazda Miata OE versus OEM definitions clarified in GCR Section 9.1.7.1. · SM and SMX shifter bushing rules clarified: alternate bushing at shift lever bottom now allowed. · SRF Hoosier decal requirement reduced from four decals in specific locations to three decals with simpler placement rules. · SRF wet tires: P185/60R13 H20/W2 option removed; P185/65R13 W2 front now required with P205/60R13 W2 rear. · SRF3 alternator pulley minimum weight reduced from 12 oz to 11 oz. · P1 now encourages unspecified engines including Diesel, hybrid, or electric via case-by-case request to Club Racing Board.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST24MAR082024-03-08 | 1:19.119Todd Vanacore · fastest of 3 · top 3 within 18.1s+0.997s (+1.28%) | 1:19.924John Mcaleer · fastest of 3 · top 3 within 17.8s-0.010s (-0.01%) | 139.8John Mcaleer-12.4 mph (-8.2%) | 1:42.620Danny Steyn · fastest of 47 · top 5 within 0.4s+0.001s (+0.00%) | 1:42.995Charles Mactutus · fastest of 46 · top 5 within 0.1s+0.442s (+0.43%) | 105.2Tyler Brown-6.9 mph (-6.2%) | +23.071squal +23.501s | 128.9%qual 129.7% | 1:33.957Grant Vogel · fastest of 40 · top 5 within 0.4s-0.238s (-0.25%) | 1:34.173Thomas Weir · fastest of 43 · top 5 within 0.5s-0.312s (-0.33%) | 122.2Robeson Clay Russell-6.6 mph (-5.1%) | +14.249squal +14.838s | 117.8%qual 118.8% | |||||||
15 rule changes (P1: 9, SRF3: 6)2 tyres & wheels · 1 engine · 1 weight · 10 wording · 1 other · P1 removes redundant effective date language from engine stalling prohibition during SIR testing. · P1 Honda K20A-FD2 engine terminology corrected from 'spec' to proper series designation. · F600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional. · P1 4-cycle 2000cc restrictor increases to 32mm, weight rises to 1450 lbs; 2300cc restrictor to 31mm, weight to 1475 lbs. · P1 Group CN Honda K20A-FD2 removes engine modification restrictions; CRB may add intake restrictor. · SRF rain/brake light now requires Super Bright LEDs Inc. P/N PT-STRB-R24 with specific connector and rain light switch. · SRF requires Super Bright LEDs P/N PT-STRB-R24 rain/brake light with strobing capability and specific wiring. · SRF adds brake duct and pedal extension rules, rear shift cable clamp option, camber limit to 5.0°, radiator opening height 3.5" ±0.5", and P2 engine restrictor changes. · SRF radiator rule clarified: P/N 480466 replaceable with Automotive P/N 1R698, CU698 or manufacturer equivalent with documentation. · P1 SIR testing procedure modified: vehicle deemed compliant if stalls within 3 seconds. · P1 Single Inlet Restrictor wording clarified; all intake air or fuel-air mixture must pass through it. · P1 ducted air rule clarified: cockpit opening, fender louvers, and engine bay heat escape devices exempt from heat exchanger requirement. · SRF Hoosier wet front tire updated to P/N 46100 P185/60R13 H20 or W2. · SRF Hoosier front rain tyre part number changes from 46100 to 46101 P185/65R13 W2. · P1 cockpit length dimension corrected from 23.662 to 23.622 inches; height and extension limits clarified with metric-imperial equivalents.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST23MAR102023-03-10 | 1:18.122Todd Vanacore · fastest of 5 · top 5 within 13.9s+0.356s (+0.46%) | 1:19.934Jean-Luc Liverato · fastest of 3 · top 3 within 1.0s+2.410s (+3.11%) | 152.2Jean-Luc Liverato-0.8 mph (-0.5%) | 1:42.619Charles Mactutus · fastest of 48 · top 5 within 0.7s-0.195s (-0.19%) | 1:42.553Charles Mactutus · fastest of 47 · top 5 within 0.4s+0.689s (+0.68%) | 112.2Jonathan Neudorf-1.3 mph (-1.2%) | +22.619squal +24.497s | 128.3%qual 131.4% | 1:34.195Charles Russell Turner · fastest of 36 · top 5 within 0.9s+0.060s (+0.06%) | 1:34.485Mark Eaton · fastest of 36 · top 5 within 0.3s+0.699s (+0.75%) | 128.8Derek Schofield-2.7 mph (-2.1%) | +14.551squal +16.073s | 118.2%qual 120.6% | |||||||
11 rule changes (P1: 5, SM: 2, SRF3: 4)2 aero · 2 suspension & brakes · 1 induction · 1 weight · 5 wording · P1 suspension covers must have symmetrical upper and lower surfaces, no airfoil shaping, cannot angle for downforce. · SRF Renault Alliance solid front rotors banned; restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weight increased to 1100 lbs for 2009+ stock engines. · SRF3 tail sections allowed on SRFs with GEN3 airbox shimming up to 19 mm; alternate dash panel P/N 180100 or 180101 relocated in rules. · SM Mazda MX-5 Miata 01-05 weight increases to 2450 lbs, or 2465 with alternate bore. · P1 aerodynamic devices limited to 1cm below lower surfaces rear of front axle; body panels covering suspension cannot be airfoil-shaped. · P1 forced induction banned: turbocharging and supercharging no longer allowed. · P1 motorcycle-based engines with individual throttle bodies must install flat plate restrictors within 4 inches of primary butterfly. · SRF tire rule wording changed from 'Tires: must be run as delivered' to 'Tires must be run as delivered.' · SRF brake rotor minimum thickness reduced from 13.25 to 12.20mm; seal and air filter rules clarified. · P1 bodywork rules clarified: cycle fenders prohibited, side body minimum height at front axle centerline required, air ducting for downforce banned. · SM Majors must run authorized Penske shock and mount; Regional competitors' requirement eligibility clarified.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST22MAR122022-03-12 | 1:17.766Chip Romer · fastest of 5 · top 5 within 2.3s-0.095s (-0.12%) | 1:17.524Chip Romer · fastest of 5 · top 5 within 2.3s-0.895s (-1.14%) | 153.0John Mcaleer+0.9 mph (+0.6%) | 1:42.814Connor Zilisch · fastest of 60 · top 5 within 0.3s+1.016s (+1.00%) | 1:41.864Travis Wiley · fastest of 60 · top 5 within 0.7s-0.700s (-0.68%) | 113.5Junior Brock-0.1 mph (-0.1%) | +24.340squal +25.048s | 131.4%qual 132.2% | 1:34.135Charles Russell Turner · fastest of 52 · top 5 within 1.2s-0.681s (-0.72%) | 1:33.786Matthew Horst · fastest of 50 · top 5 within 0.2s-0.886s (-0.94%) | 131.5Peyton Long+4.2 mph (+3.3%) | +16.262squal +16.369s | 121.0%qual 121.0% | |||||||
16 rule changes (P1: 10, SM: 1, SRF3: 5)3 engine · 2 cars added · 2 tyres & wheels · 1 weight · 8 wording · P1 2-cycle 6-cylinder displacement increases to 1725 cc, restrictor shrinks to 40mm, minimum weight drops to 1275 lbs. · SRF front wet tire changes from P185/60R13 H20 to P185/65R13 W2; SRF3 adds mandatory G301048 restrictor plate Jan. 1, 2022. · P1 splits 2000cc and 2300cc engines into separate spec lines H and I with dedicated minimum weights. · P1 Staudacher cars with 38.5mm flat plate intake restrictor reduced to 950 lbs minimum weight. · P1 adds 1355cc motorcycle-based engine spec line with no restrictor required, minimum weight 1075 lbs. · SRF wet tyres add Hoosier P185/60R13 W2 front and P205/60R13 W2 rear as alternatives to H20. · SRF adds SADEV-SRF3 6-speed sequential option with final drive 3.20 versus OEM 5-speed 3.85. · SRF seal procedures clarified: unsealed components need CSR inspection and logbook notation instead of engine removal. · SRF3 alternator pulley restricted to P/N G902130 or G902130A, 12oz minimum weight. · P1 tonneau cover wording clarified: equipment must be securely attached; covers allowed for minimum dimensions. · P1 Staudacher with 1005cc homologated before 1-1-2014 may run 38.5mm flat plate intake restrictor at 950 lbs minimum weight. · P1 Spec Lines C and G: intake restrictor rules clarified with specific displacement and weight thresholds; wording standardized. · P1 Spec Lines B, C, D maximum valves per cylinder set to 4, was NA. · P1 Spec Line A clarifies carburetor induction only, one per cylinder, balance tubes not allowed. · P1 Spec Line H notes clarify peripheral port or bridgeport allowed. · SM adds procedures for testing obsolete part replacements and BOP updates in sanctioned events with CRB approval.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST21MAR192021-03-19 | 1:17.861John Mcaleer · fastest of 5 · top 5 within 7.0s | 1:18.419John Mcaleer · fastest of 5 · top 5 within 6.9s | 152.1John Mcaleer | 1:41.798Danny Steyn · fastest of 68 · top 5 within 0.7s | 1:42.564Preston Pardus · fastest of 67 · top 5 within 0.2s | 113.6Marc Cefalo | +24.145squal +23.937s | 130.8%qual 130.7% | 1:34.816Brian Schofield · fastest of 77 · top 5 within 0.5s | 1:34.672Mark Snyder · fastest of 69 · top 5 within 0.2s | 127.3Matthew Horst | +16.253squal +16.955s | 120.7%qual 121.8% | |||||||
38 earlier rule changes on record, in force before Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta (from 2019)3 suspension & brakes · 2 engine · 2 removed · 1 induction · 1 tyres & wheels · 1 weight · 28 wording · P1 Elan DP02 Mazda MZR sealed engine option removal effective 3/1/2021. · P1 engine table updates terminology from inlet to intake restrictor across multiple spec lines. · SRF and SRF3 mandatory identification simplified: removed Ford Performance and Blue Oval decals, kept Hoosier logo placement. · SRF shocks, springs, bump stops sealed; rear springs 412-429 lbs/in P/N 280390 only; previous parts no longer allowed. · SM aftermarket radiators must mount in original location, maintain core plane, require no body modifications, block openings, keep one OEM fan in stock location; 1990-1997 cars may install upper radiator seal NA75-50-OK7A. · SM rear brake calipers may use single bracket under upper retaining bolt to prevent pin failure. · SRF3 shock absorber brand restriction removed; all shocks must be sealed by Enterprises. · P1 intake manifolds unrestricted on engines without flat plate restrictor; plenums and balance pipes prohibited on individual runner manifolds with restrictor. · SRF3 bump stop now must be SCCA P/N 280407 only, no modifications, optional, max one per shock. · SRF shock absorber bump stop clarified: only SCCA P/N 280407 allowed as delivered, maximum one per shock, effective 05/01/2020. · P1 sealed DP02-spec 2.0L Mazda MZR Elan removal date extended from 1/1/2020 to 1/1/2021. · P1 sealed DP02-spec 2.0 MZR engine removed effective 1/1/2020; competitors may use Spec Line G. · P1 Spec Line F Honda K20A-FD2 reclassified from Restricted 2.0L Group to CN-spec with stock intake manifold and 64mm throttle body. · SRF rain and brake rule wording updated; supersedes GCR 9.3.32.B.2 effective 1/1/202 through 12/31/2024. · SRF bans tire warmers and cooling methods other than natural air convection or conduction. · SRF front nose weight minimum reduced from 35 to 32 lbs. · SRF3 reclassified as Spec Racer Ford 3 with 1.6L conversion; SRF2 becomes Regional Only Class. · P1 traction control prohibited in GCR section 9.1.8.C.H. · P1 allows mechanical and solenoid shifters, prohibits electronic controls and pre-selected changes. · P1 bodywork minimum height provision moved to aerodynamic section; 115cm height limit for aero parts added. · P1 clarifies fender louver and brake duct rules, consolidating duplicative provisions in GCR 9.1.8.C. · SRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102. · P1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted. · P1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections. · SRF3 nose assembly must use approved multi-piece design; no modifications allowed except as specified. · P1 Engine Table reference cleaned up; no performance change. · P1 Mazda Renesis Rotary removed from Engine Table specification line. · SRF3 brakes now allow Hawk Blue 9012 pads P/N 801993 only; shocks simplified to Penske P/N 280396 sealed assembly only, with optional SCCA Enterprises bump rubber P/N 280407 from 05/01/2020. · P1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes. · P1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged. · SM fuel pump and filter must be Mazda or OEM Equivalent part. · P1 engine table reference corrected from 'above' to 'below'; ECU throttle wording clarified for dual sensors and fail-safes. · SM 1999-2000 model year cars may use replacement Mazda ECU and injector harnesses, unmodified. · SM electrical rules reorganized and clarified; alternator external regulation now prohibited except via OEM ECU/kill switch. · SM removes tire tread protrusion beyond fender opening requirement from GCR 9.1.7.C.5. · P1 removes redundant TIR inlet restrictor provisions; SIR and flat plate restrictors remain required. · P1 Honda K20A-FD2 CN-spec clarifies allowed parts to OEM list only, no machining. · P1 engine table wording corrected; head designs removed from listed specifications.show
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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 P1" is the class's best as a share of P1'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 P1'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.