BoP Lab / Michelin Raceway Road Atlanta
STL vs FX vs SM pace at Michelin Raceway Road Atlanta
Quickest here: STL 1:35.212 Danny Steyn, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta race · FX 1:25.399 Trent Walko, 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
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs STL | % of STL | Qual best | Race best | Trap | vs STL | % of STL | |||
| Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta ST26MAR062026-03-06 | 1:37.000Danny Steyn · fastest of 15 · top 5 within 1.6s+0.012s (+0.01%) | 1:36.825Danny Steyn · fastest of 14 · top 5 within 3.2s-0.382s (-0.39%) | 126.5Derek Ketchie+6.5 mph (+5.4%) | 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%) | +5.786squal +5.324s | 106.0%qual 105.5% | |||||||
6 rule changes (STL: 3, SM: 3)2 weight · 4 wording · STL minimum weights increase across all classes, 1300 cc gains 195 lbs to 1950, up to 1850 cc at 2500. · STL/STU Lotus weight reduced: Evora GT4 to 2700 lbs, Elise Cup R to 2250 lbs, Elise/Exige SC to 2450-2550 lbs. · 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. · STL Mazda MX5 Challenge minimum weight now references GCR 9.1.7.1 instead of 2500 lbs; spec components removed, only alternative tires allowed.show
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| Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta ST25MAR072025-03-07 | 1:36.988Mike Taylor · fastest of 13 · top 5 within 2.0s+0.632s (+0.66%) | 1:37.207Mike Taylor · fastest of 11 · top 5 within 1.3s+0.354s (+0.37%) | 120.1Derek Ketchie+1.7 mph (+1.5%) | 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%) | +5.418squal +5.860s | 105.6%qual 106.0% | |||||||
9 rule changes (STL: 1, FX: 3, SM: 5)2 weight · 1 cars added · 6 wording · FX Ligier JS F422 loses 15 lbs, to 1360 minimum weight. · SMX allows OE instrument cluster relocation for aftermarket dash mounting, with wiring re-routed only; alternate gauges now permitted. · STL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval. · 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. · FX Ligier JS F4 1st Gen minimum weight drops to 1405 lbs; 2nd Gen rises to 1375 lbs. · FX adds 2nd Gen Ligier JS F422 classification effective 2024-04-01.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST24MAR082024-03-08 | 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+1.641s (+1.72%) | 118.3Mike Taylor-8.8 mph (-6.9%) | 1:34.337Brad Yake · only car+5.991s (+6.78%) | 1:36.351Brad Yake · only car+10.952s (+12.82%) | 117.3Brad Yake-19.8 mph (-14.4%) | -0.502squal -2.019s | 99.5%qual 97.9% | 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%) | +6.142squal +6.264s | 106.3%qual 106.5% | ||
8 rule changes (STL: 5, FX: 3)2 induction · 1 cars added · 1 engine · 4 wording · FX Formula 4 now complies with Table 1 notes only; removed reference to FIA 2015 technical regulations and FIA/SCCA safety requirements. · STL and STU power steering rules clarified to permit electric-assisted and hydraulic-assisted steering systems. · STL Acura/Honda B-series and Mazda MZR restrictors reduced 2mm; minimum weights down 25–75 lbs for 1900–2000cc engines. · STL Mazda 12A must keep 5th and 6th intake port actuators and valves, no longer allowed removal or disabling. · STL Mazda RX-7 12A (79-85) now allows auto-type 2 bbl with 42mm choke(s) on dual-y manifold as alternate to stock Nikki 4 bbl. · Unable to summarize: FX Formula Mazda spec changes reference attached document not provided. · USF2000 Van Diemen with Mazda MZR LF-DE 2.0L added as spec line car in FC; removed from FX. · STL ITA/ITS RX7 and 1985+ ITA/ITS/ITB/ITC vehicles clarified to conform to section 9.1.4.2 tire specifications.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST23MAR102023-03-10 | 1:36.469Danny Steyn · fastest of 16 · top 5 within 3.9s+0.493s (+0.51%) | 1:35.212Danny Steyn · fastest of 17 · top 5 within 3.8s-0.267s (-0.28%) | 127.1Mike Taylor+0.7 mph (+0.6%) | 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%) | +7.341squal +6.150s | 107.7%qual 106.4% | |||||||
10 rule changes (STL: 1, FX: 7, SM: 2)2 engine · 2 weight · 1 cars added · 1 induction · 4 wording · FX: Wording clarified to remove references to FB and FM in GCR section 1.4.2.D. · SM Mazda MX-5 Miata 01-05 weight increases to 2450 lbs, or 2465 with alternate bore. · STL Spec MX5 clutch, wheels, and tyres specified: ACT 0000-02-5004-G6, 17x8 wheels, Toyo RR and RA1 235-40-17. · Formula Renault 2.0 (10-17) reclassified from FX to FA; weight reduced to 1280 lbs, restrictor removed. · Pro Formula F2000 tube frame reduced to 4 forward gears, sequential carries 25 lb. weight penalty. · FX Formula Mazda minimum weight exception set to 1270 lb. · FX Formula Mazda engine spec changed to six-port 13B only; weight now per notes instead of 1350/1400. · Formula Renault 2.0 (10-17) now requires 45mm Flat Plate Intake Restrictor; fairings prohibited before or after. · USF2000 Tube Frame may now use Performance Electronics PE3-8400 ECU as alternative to Pectel T2. · 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 | 1:35.976Danny Steyn · fastest of 18 · top 5 within 2.9s-0.449s (-0.47%) | 1:35.479Danny Steyn · fastest of 18 · top 5 within 3.2s-1.326s (-1.37%) | 126.3Trever Degioanni+2.5 mph (+2.1%) | 1:28.346Trent Walko · fastest of 4 · top 4 within 6.6s+0.215s (+0.24%) | 1:25.399Trent Walko · fastest of 4 · top 4 within 5.7s-2.391s (-2.72%) | 137.1Trent Walko+2.7 mph (+2.0%) | -10.080squal -7.630s | 89.4%qual 92.1% | 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%) | +6.385squal +6.838s | 106.7%qual 107.1% | ||
19 rule changes (STL: 11, FX: 7, SM: 1)5 tyres & wheels · 2 cars added · 2 induction · 1 engine · 1 weight · 7 wording · 1 other · STU normally aspirated engines: minimum weights reduced up to 310 lbs; single throttle body weight reduction removed. · STL and STU Improved Touring vehicles must conform to 9.1.4 Tires & Wheels requirements. · Formula Mazda tire marking no longer required; compliance now referenced to updated online specifications document. · FX Formula 4 tire choice becomes unrestricted; must comply with FIA F4 2015 Technical Regulations and subsequent safety requirements. · FX USF2000 Tube Frame front tyre changes from radial to unspecified type, rear tyre options added. · FX Formula Renault 2.0 (00-17) tire choice unrestricted; original components required except repairs. · STL and STU piston engines clarified: intake manifold and cylinder head porting remains free. · STL Mazda Renesis flat plate restrictor increases from 55mm to 60mm. · STL Mazda RX-7 12A 79-85 clarifies carburetor, emissions, and water jacket modification rules. · STL Spec MX-5 removes redundant specification line; no performance change. · FX USF2000 Tube Frame allows Hoosier radials 20.5x7.0x13 front and 22.5x8.0x13 rear, FC-compliant shocks, Wilwood brakes, Bosch spark plugs. · FX USF2000 Tube Frame now allows any Hoosier radial tire 20.5x7.0x13 front, 22.5x8.0x13 rear. · STL Volkswagen 2.0L TFSI 1984cc classified with turbocharger removal required, meeting all other STL specs. · FX adds 2000-2009 Formula Renault 2.0 / Fran-Am 2000 classified at 1250 lbs with sealed 2.0L Renault F4R 832 engine. · STL Pontiac Solstice/Saturn Sky allowed 4" ride height. · STL Mazda B5 DOHC added to classification with standard STL regulations. · STL Honda B16A JDM restrictor reduced from 54mm to 53mm. · SM adds procedures for testing obsolete part replacements and BOP updates in sanctioned events with CRB approval. · ST oil coolers and filters now explicitly allowed to be added or substituted; wording clarifies existing permissions.show
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| Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST21MAR192021-03-19 | 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 | 1:28.131Austin Hill · fastest of 6 · top 5 within 3.8s | 1:27.790Austin Hill · fastest of 6 · top 5 within 4.1s | 134.4Austin Hill | -9.015squal -8.294s | 90.7%qual 91.4% | 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 | +5.759squal +5.373s | 105.9%qual 105.6% | ||
45 earlier rule changes on record, in force before Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta (from 2019)9 cars added · 8 induction · 3 weight · 2 aero · 2 engine · 1 suspension & brakes · 20 wording · STL GM Ecotec engines now permit any combination within the family, must use 55mm flat plate restrictor. · STL/STU 90-05 Mazda Miata gains approval for Mazda Motorsports Development alternate front wheel hubs. · ST cars may relocate ABS actuation hardware and wiring anywhere in engine compartment. · STL rear wing trailing edge, including end plates and gurney flap, maximum rearward mounting clarified to center of rearmost bodywork. · STL allows OEM gear sets from same manufacturer transmissions with input shaft modifications for fitment. · Formula Renault 2.0 (2010–2017) newly classified in FX, must comply with Table 1 notes. · STL RWD strut suspension weight penalty cut to 0.5%, other RWD cut to 2.5%. · STL Honda F20C loses 2% weight penalty, minimum weight reduced by approximately 35 lbs. · STL Honda B16/B17/B18C1 restrictor tightened to 53mm; B18C variants and Mazda MZR to 52mm. · FX FormulaSPEED FS2.0 specification requirements updated; World Speed Inc. deadline removed, compliance now per SCCA website. · ST aero devices and reference areas now include end plates but exclude fasteners protruding over 1/2 inch. · 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. · Formula Ireland / Formula FX added to FX classification under Table 1 with compliance notes. · SM rear brake calipers may use single bracket under upper retaining bolt to prevent pin failure. · STL and STU clarify weight adjustment calculation order: engine adjustments first, then chassis adjustments. · STL and STU rear wing rules clarify that wicker is a Gurney flap; no performance change. · Formula Ireland/Formula FX car addition to FX Table 1 pending specification submission; not recommended. · GT3 and STU add Borg-Warner EFR6258 to approved turbocharger list. · STL adds 2016-2019 Mazda MX-5 Global Cup at 2000cc, 2450-2550 lbs minimum weight. · STL Mazda MX-5 Club Model 06-15 allows Mazda header part number 0000-06-5407-NC. · STL Honda/Acura B18 non-C gets 54mm restrictor; B18C variants drop B18C1, get 53mm restrictor. · STL Honda B18 restrictor reduced from 54mm to 53mm flat plate; B18C1 added with 54mm restrictor. · Ex-Pro Formula Super Vee classified in FX with 1190 lbs minimum weight, 1600cc or 1835cc VW engine, 6in front and 8in rear wheels. · FormulaSPEED reclassified from FA to FX with 2.0L Mazda MZR engine, 1350 lbs minimum weight, sealed ECU and dampers. · STU GM Ecotech LNF now allowed with turbo removed or with LE5 head and intake manifold, meeting STL specs. · STL Mazda MZR restrictor reduced from 54 mm to 53 mm. · STL Mazda MZR restrictor reduced from 55 mm to 53 mm. · FX Formula Mazda no longer requires tire marking; must comply with December 2019 GCR rules. · STL Mazda Spec MX5 Challenge adds approved wheel part numbers 0000-04-5706-GM, 0000-04-5706-SL. · Pro Formula F 2000 Tube Frame engine now must follow current FC rules with restricted ECU map, cams, and air restrictor required. · Mazda Spec MX-5 Challenge classified in STL with 2000cc displacement and 2500 lbs minimum weight. · STU alternate intake manifolds now allowed case-by-case instead of prohibited. · STL Acura/Honda B18 except C engine restrictor increases from 53mm to 54mm flat plate. · STL and STU ride height measurement clarified: without driver, at rocker panel lowest point, excluding pinch weld. · SM fuel pump and filter must be Mazda or OEM Equivalent part. · STL adds VW 1.8L R4 20VT 1781cc, 1 minimum weight, turbo removed permitted. · STL Mazda Renesis minimum weight reduced from 2800 to 2700 lbs. · STL Mazda MX-5 Cup brake pad compound changed to open. · STL adds Acura/Honda B18C1 GSR with 54mm flat plate restrictor and port matching limited to 1 inch. · STL Mazda 12 and 13B now permit port matching; previous ban removed. · 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. · STL B18C Type R variants get 54mm flat plate restrictor; B17 also gets 54mm restrictor. · STL Mazda Miata removes maximum displacement limit and adjusts minimum weight.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 STL" is the class's best as a share of STL'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 STL'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.