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FX pace at every track

Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), 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.

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AS+B-Spec+EP+FA+FC+FE2+FF+FP+FV+FX×GT1+GT2+GTX+HP+P+P2+SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 51 inactive classes
Series
Reference · what % is measured against, 3 eventsall classes that day, as if at an average track
Tracks · untick to narrow

Closest to the field: FX 82.3% of the field Vaughn Glace, Indianapolis Motor Speedway Runoffs 2021 race

1:401:502:002:102:205 rule changes between Runoffs 2020 and Runoffs 20215 ▾9 rule changes between Runoffs 2021 and Runoffs 20229 ▾FX race best at Runoffs 2020: 2:17.553 (Jacob Loomis)FX race best at Runoffs 2021: 1:38.833 (Vaughn Glace)FX race best at Runoffs 2022: 2:08.711 (Dimitrios Tsesmetzis)FX qualifying best at Runoffs 2020: 2:16.968 (Jacob Loomis)FX qualifying best at Runoffs 2021: 1:38.596 (Vaughn Glace)FX qualifying best at Runoffs 2022: 1:51.480 (Trevor A Russell)Road America · Runoffs 2020Runoffs2020Indianapolis Motor Speedway · Runoffs 2021Runoffs2021Virginia International Raceway · Runoffs 2022Runoffs2022
FXsolid race · dashed qualifying · slower is lowerIndianapolis Motor SpeedwayRoad AmericaVirginia International Raceway
82%83%84%85%86%5 rule changes between Runoffs 2020 and Runoffs 20215 ▾9 rule changes between Runoffs 2021 and Runoffs 20229 ▾FX race best at Runoffs 2020: 85.8% of Field's (Jacob Loomis)FX race best at Runoffs 2021: 82.3% of Field's (Vaughn Glace)FX race best at Runoffs 2022: 86.2% of Field's (Dimitrios Tsesmetzis)FX qualifying best at Runoffs 2020: 86.3% of Field's (Jacob Loomis)FX qualifying best at Runoffs 2021: 84.9% of Field's (Vaughn Glace)FX qualifying best at Runoffs 2022: 83.8% of Field's (Trevor A Russell)Road America · Runoffs 2020Runoffs2020Indianapolis Motor Speedway · Runoffs 2021Runoffs2021Virginia International Raceway · Runoffs 2022Runoffs2022
FXsolid race · dashed qualifying · each class's best lap as a share of the field's at the same event (the field index, changeable above); 100% is level, less is quicker, so up the chart is quickerIndianapolis Motor SpeedwayRoad AmericaVirginia International Raceway
EventFX
Qual best Race best Trap % of the field 
Virginia International Raceway Runoffs 20222022-09-241:51.480Trevor A Russell · fastest of 5 · top 5 within 9.7s2:08.711Dimitrios Tsesmetzis · fastest of 4 · top 4 within 6.8s137.2Trevor A Russell86.2%qual 83.8%
9 rule changes (FX: 9)3 tyres & wheels · 2 cars added · 1 engine · 1 induction · 1 weight · 1 wording · 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. · 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.showhide
  • Pro Formula F2000/USF2000 Transmission E&O #32823engineslowerenginePro Formula F2000 tube frame transmission cut to 4 forward gears; sequential carries 25 lb. weight penalty.
  • Formula Mazda Minimum Weight #33010weightslowerweightFX Formula Mazda minimum weight set to 1270 lb.
  • Formula Mazda Spec Line E&O Corrections #33011cars addedremovedcars addedFX Formula Mazda drops four-port Renesis engine option; weight minimum now per notes.
  • Formula Renault 2.0 (10-17) Intake Restrictor #32745inductionslowerinductionFormula Renault 2.0 (10-17) now requires 45mm Flat Plate Intake Restrictor; fairings before or after prohibited.
  • Allow Performance Electronics PE3-8400 for USF2000 MZR #32767cars addedaddedUSF2000 Tube Frame adds Performance Electronics PE3-8400 ECU as alternative to Pectel T2.
  • FM Rule Set Clarification #31881wordingwordingFormula Mazda FX rule reference updated to current specifications document; tire marking no longer required.
  • E&O F4 Tires #31940tyres & wheelsaddedtyres & wheelsFX Formula 4 tire choice unrestricted; must provide FIA certification rules upon request.
  • E&O USF2000 Tube Frame #31951tyres & wheelstyres & wheelsFX 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.
  • URGENT - FX- Formula Renault Tire #32058tyres & wheelsaddedtyres & wheelsFX Formula Renault 2.0 (00-09) and (10-17) tire choice unrestricted; no other component alterations except repairs.
Indianapolis Motor Speedway Runoffs 20212021-09-251:38.596Vaughn Glace · fastest of 15 · top 5 within 4.1s1:38.833Vaughn Glace · fastest of 15 · top 5 within 4.3s138.6Vaughn Glace82.3%qual 84.9%
5 rule changes (FX: 5)2 cars added · 1 tyres & wheels · 1 wording · 1 other · 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.showhide
  • Rules Adjustment #30950otheraddedFX USF2000 Tube Frame gains Hoosier radial tyre option, FC-compliant shocks, Wilwood brakes, and Bosch spark plugs.
  • FX/FRP Tire Rule #30723tyres & wheelsaddedtyres & wheelsFX USF2000 Tube Frame now allows any Hoosier radial tire 20.5×7.0×13 front, 22.5×8.0×13 rear.
  • Classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000 #30460cars addedaddedFormula Renault 2.0 / Fran-Am 2000 added to FX class at 1250 lbs with 8-inch front, 10-inch rear wheels, sealed engine.
  • Request for Car Classification to Compete in Formula X #29933cars addedaddedFX adds 2010–2017 Formula Renault 2.0, must comply with Table 1 notes.
  • Update specifications for FormulaSPEED cars #29674wordingwordingFX FormulaSPEED FS2.0 now references online specifications instead of requiring World Speed Inc. documentation by April 2020.
Road America Runoffs 20202020-10-022:16.968Jacob Loomis · fastest of 12 · top 5 within 2.7s2:17.553Jacob Loomis · fastest of 11 · top 5 within 3.5s139.3Brad Drew85.8%qual 86.3%
6 earlier rule changes on record, in force before Runoffs 2020 (from 2020)4 cars added · 2 wording · 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. · Pro Formula F 2000 and USF2000 Tube Frame engine and car rules simplified; FC rules and FRP MAZDA MZR F2000 specs now apply directly.showhide
  • Follow up to to Letter#28991 Request for FX classification #29281cars addedaddedFormula Ireland / Formula FX added to FX class, must comply with Table 1 notes.
  • Request to be added to FX group #28991cars addedaddedFormula Ireland/Formula FX cars pending specification submission for possible FX table addition.
  • Request to classify FSV in FX #28057cars addedaddedEx-Pro Formula Super Vee added to FX with 1600cc VW engine, 1190 lb minimum weight, 6-inch front and 8-inch rear wheels.
  • Classify FormulaSPEED in FX #28715cars addedaddedFormulaSPEED with 2.0L Mazda MZR engine, 8in front/10in rear wheels, adjustable dual rear planes, 1350 lbs moves from FA to FX.
  • Request to remove tire marking language from FM #28415wordingwordingFX Formula Mazda no longer requires tire marking; must comply with December 2019 GCR rules.
  • Change to FX Table 1 #28322wordingunclearPro Formula F 2000 and USF2000 Tube Frame engine and car rules simplified; FC rules and FRP MAZDA MZR F2000 specs now apply directly.

By track

TrackEvents Typical % of the field Best Latest 
Indianapolis Motor Speedway182.3%82.3%Runoffs 202182.3%Runoffs 2021
Road America185.8%85.8%Runoffs 202085.8%Runoffs 2020
Virginia International Raceway186.2%86.2%Runoffs 202286.2%Runoffs 2022
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 the field's best on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks): the weather and the day cancel out, so one figure compares across years where lap times cannot, and across tracks too, since the class's own character at each track is taken out. A track with only one or two events on record is corrected less, since there is less to go on. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.