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BoP Lab / Classes / PX

PX vs BSpc vs GTX vs FX pace at every track

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)
ASB-SpecvsBSpc×EPFAFCFE2FFFPFVvsFX×GT1GT2vsGTX×HPPP2PX×SMSMXSRF3STLSTUT1T2T3T4Show 49 inactive classes
Series
Reference · what % is measured against, 3 events
Tracks · untick to narrow
1:401:502:002:102:209 rule changes between Runoffs 2020 and Runoffs 20219 ▾17 rule changes between Runoffs 2021 and Runoffs 202217 ▾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
PXBSpcGTXFXsolid race · dashed qualifying · slower is lower
EventPXBSpcGTXFX
Qual best Race best Trap Qual best Race best Trap vs PX Qual best Race best Trap vs PX Qual best Race best Trap vs PX 
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 Russell
17 rule changes (GTX: 8, FX: 9)4 cars added · 4 tyres & wheels · 3 weight · 2 engine · 2 induction · 1 suspension & brakes · 1 othershowhide
  • GTX Tail lights on all GT category race cars. #32799suspension & brakes
  • FX Pro Formula F2000/USF2000 Transmission E&O #32823weight
  • FX Formula Mazda Minimum Weight #33010weight
  • FX Formula Mazda Spec Line E&O Corrections #33011engine
  • FX Formula Renault 2.0 (10-17) Intake Restrictor #32745induction
  • FX Allow Performance Electronics PE3-8400 for USF2000 MZR #32767engine
  • GTX Classify 992 GT3 Cup #32649cars added
  • GTX Add Classification to the accepted Model Table #31981weight
  • GTX Request to classify C7 Corvette Grand Sport IN GTX Misc #32254cars added
  • GTX E&O list of eligible prototypes #32511other
  • GTX McLaren 720s GT3 #31955cars added
  • FX FM Rule Set Clarification #31881tyres & wheels
  • FX E&O F4 Tires #31940tyres & wheels
  • FX E&O USF2000 Tube Frame #31951tyres & wheels
  • FX URGENT - FX- Formula Renault Tire #32058tyres & wheels
  • GTX Remove restrictions from GTX-FIA GT3 #32039induction
  • GTX Request car classification #31032cars added
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 Glace
9 rule changes (GTX: 4, FX: 5)5 cars added · 2 tyres & wheels · 1 induction · 1 wordingshowhide
  • GTX Request to classify 2020 Porsche 718 GT4 Clubsport MR #30956cars added
  • FX Rules Adjustment #30950tyres & wheels
  • GTX Request to Update GTA Obsolete Part Numbers #30615wording
  • GTX GTX class correction to GT2/ST #30973cars added
  • GTX Request classification of Grullon #30481cars added
  • FX FX/FRP Tire Rule #30723tyres & wheels
  • FX Classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000 #30460cars added
  • FX Request for Car Classification to Compete in Formula X #29933cars added
  • FX Update specifications for FormulaSPEED cars #29674induction
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 Drew
21 earlier rule changes on record, in force before Runoffs 2020 (from 2019)10 cars added · 3 aero · 2 induction · 1 engine · 1 suspension & brakes · 1 tyres & wheels · 3 othershowhide
  • FX Follow up to to Letter#28991 Request for FX classification #29281cars added
  • GTX GT Category Wording #29193induction
  • GTX Request Car classification #28935cars added
  • GTX X-Bow GT4 #29088cars added
  • FX Request to be added to FX group #28991other
  • GTX TA2 Gurney flap wicker clarification #28874aero
  • GTX STO Gurney flap wicker clarification #28883aero
  • GTX GT Gurney flap wicker clarification #28909aero
  • GTX Request to Re-classify SP Stock car to GTX #28333cars added
  • GTX Request to Classify Lotus Evora GTS #27057cars added
  • FX Request to classify FSV in FX #28057cars added
  • FX Classify FormulaSPEED in FX #28715cars added
  • FX Request to remove tire marking language from FM #28415tyres & wheels
  • FX Change to FX Table 1 #28322induction
  • GTX Windshield Clips #27323other
  • GTX Request Factory Five Daytona coupe classification #26308cars added
  • GTX Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine
  • GTX Request to Classify Ligier JS2 R #26535cars added
  • GTX Request Ride Height Clarification #26600suspension & brakes
  • GTX Replace FIA references with SRO #26427other
  • GTX GTX Homologation table update #26034cars added

By track

TrackEvents 
Indianapolis Motor Speedway1
Road America1
Virginia International Raceway1
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 reference class's best on the same day: the weather and the day cancel out, so one figure compares across years where lap times cannot; a class that suits one track more than another still reads differently there. It still moves when the yardstick's own balance changes or its field thins, and an event the yardstick did not run has no point. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.