BoP Lab / Buttonwillow Raceway Park
F6 vs FM vs FX pace at Buttonwillow Raceway Park
Quickest here: F6 1:59.670 Jeff Jorgenson, Super Tour Feb 2024 race · FM 1:45.954 Mike Anderson, Super Tour Apr 2018 race · FX 1:48.518 Bill Weaver, Super Tour Feb 2020 race
| Event | F6 | FM | FX | ||||||||||||
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs F6 | % of F6 | Qual best | Race best | Trap | vs F6 | % of F6 | |||
| Super Tour Feb 2024 CALCL242024-02-23 | 2:00.926Jeff Jorgenson · only car | 1:59.670Jeff Jorgenson · only car | 104.7Jeff Jorgenson | ||||||||||||
9 rule changes (FX: 9)3 cars added · 2 weight · 1 engine · 1 induction · 1 wording · 1 other · FX Formula Mazda specifications updated; attached table not provided. · USF2000 Van Diemen with Mazda MZR LF-DE 2.0L added to FC as spec line car; removed from FX. · FX: Remove FB and FM from combined-class preferences in GCR 1.4.2.D. · Formula Renault 2.0 (10-17) reclassified from FX to FA spec line; minimum weight reduced 1300 to 1280 lbs, restrictor removed. · Pro Formula F2000 tube frame transmission cut to 4 forward gears; sequential carries 25 lb. weight penalty. · FX Formula Mazda minimum weight set to 1270 lb. · FX Formula Mazda drops four-port Renesis engine option; weight minimum now per notes. · Formula Renault 2.0 (10-17) now requires 45mm Flat Plate Intake Restrictor; fairings before or after prohibited. · USF2000 Tube Frame adds Performance Electronics PE3-8400 ECU as alternative to Pectel T2.show
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| Super Tour Feb 2022 CALCL222022-02-17 | 1:48.641Max Parker · fastest of 3 · top 3 within 5.1s-0.679s (-0.62%) | 1:49.461Max Parker · fastest of 3 · top 3 within 4.6s+0.943s (+0.87%) | 117.4Terrance Carraher-12.5 mph (-9.6%) | ||||||||||||
14 rule changes (FX: 14)6 cars added · 4 tyres & wheels · 3 wording · 1 other · Formula Mazda FX rule reference updated to current specifications document; tire marking no longer required. · FX Formula 4 tire choice unrestricted; must provide FIA certification rules upon request. · FX USF2000 Tube Frame front tyre changes from Hoosier radial 20.5 x 7.0 x 13 to any Hoosier 20.5 x 7.0 x 13. · FX Formula Renault 2.0 (00-09) and (10-17) tire choice unrestricted; no other component alterations except repairs. · FX USF2000 Tube Frame gains Hoosier radial tyre option, FC-compliant shocks, Wilwood brakes, and Bosch spark plugs. · FX USF2000 Tube Frame now allows any Hoosier radial tire 20.5×7.0×13 front, 22.5×8.0×13 rear. · Formula Renault 2.0 / Fran-Am 2000 added to FX class at 1250 lbs with 8-inch front, 10-inch rear wheels, sealed engine. · FX adds 2010–2017 Formula Renault 2.0, must comply with Table 1 notes. · FX FormulaSPEED FS2.0 now references online specifications instead of requiring World Speed Inc. documentation by April 2020. · Formula Ireland / Formula FX added to FX class, must comply with Table 1 notes. · Formula Ireland/Formula FX cars pending specification submission for possible FX table addition. · Ex-Pro Formula Super Vee added to FX with 1600cc VW engine, 1190 lb minimum weight, 6-inch front and 8-inch rear wheels. · FormulaSPEED with 2.0L Mazda MZR engine, 8in front/10in rear wheels, adjustable dual rear planes, 1350 lbs moves from FA to FX. · FX Formula Mazda no longer requires tire marking; must comply with December 2019 GCR rules.show
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| Super Tour Feb 2020 ST20FEB212020-02-21 | 1:49.320Steve Martin · fastest of 5 · top 5 within 6.7s | 1:48.518Bill Weaver · fastest of 5 · top 5 within 6.8s | 129.9Steve Martin | ||||||||||||
1 rule change (FX: 1)1 wording · Pro Formula F 2000 and USF2000 Tube Frame engine and car rules simplified; FC rules and FRP MAZDA MZR F2000 specs now apply directly.show
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| Super Tour Apr 2019 ST19APR262019-04-26 | 1:49.608Mike Anderson · fastest of 3 · top 3 within 5.6s+3.285s (+3.09%) | 1:49.409Mike Anderson · fastest of 3 · top 3 within 4.9s+3.455s (+3.26%) | 121.2Mike Anderson | ||||||||||||
| No rule changes on record between these events | |||||||||||||||
| Super Tour Apr 2018 BUTTRA182018-04-27 | 1:46.323Mike Anderson · fastest of 9 · top 5 within 2.1s+0.367s (+0.35%) | 1:45.954Mike Anderson · fastest of 9 · top 5 within 3.3s-0.317s (-0.30%) | |||||||||||||
| No rule changes on record between these events | |||||||||||||||
| Super Tour Apr 2017 BUTTRA172017-04-28 | 1:45.956Mike Anderson · fastest of 8 · top 5 within 2.0s | 1:46.271Mike Anderson · fastest of 10 · top 5 within 2.1s | |||||||||||||
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 F6" is the class's best as a share of F6'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 F6'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.