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CF vs ITR vs FX pace at every track

Class · click a class to switch, + to compare alongside (up to 4)
AS+B-Spec+CF×EP+FA+FC+FE2+FF+FP+FV+vsFX×GT1+GT2+GTX+HP+vsITR×P+P2+SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 49 inactive classes
Series
Reference · what % is measured against, 3 events
Tracks · untick to narrow
1:401:502:002:102:206 rule changes between Runoffs 2020 and Runoffs 20216 ▾11 rule changes between Runoffs 2021 and Runoffs 202211 ▾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
CFITRFXsolid race · dashed qualifying · slower is lower
EventCFITRFX
Qual best Race best Trap Qual best Race best Trap vs CF Qual best Race best Trap vs CF 
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
11 rule changes (ITR: 2, FX: 9)4 tyres & wheels · 2 engine · 2 induction · 2 weight · 1 cars addedshowhide
  • 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
  • ITR Request to classify 93 Talon TSI AWD #31727cars 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
  • ITR Class Turbo Cars #29774induction
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
6 rule changes (ITR: 1, FX: 5)3 cars added · 2 tyres & wheels · 1 inductionshowhide
  • FX Rules Adjustment #30950tyres & wheels
  • 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
  • ITR Request to classify a 2003 Honda Accord #28898cars added
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
12 earlier rule changes on record, in force before Runoffs 2020 (from 2019)5 cars added · 2 induction · 2 tyres & wheels · 2 weight · 1 othershowhide
  • FX Follow up to to Letter#28991 Request for FX classification #29281cars added
  • FX Request to be added to FX group #28991other
  • ITR Cleanup 4.f Traction control #28609tyres & wheels
  • 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
  • ITR Request to Classify 2008-2013 BMW 128i #26724cars added
  • ITR Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • ITR Please Classify the '13-'14 Subaru BRZ/ Scion FRS in IT #27242cars added
  • ITR Request Reduction of Minimum weight for 2000-2003 Honda S2000 #26096weight +20 lbs
  • ITR Request clarification on 9.1.3 D1.A.2 #26237induction

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.