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BoP Lab / Classes / CFC

CFC vs ITR vs SMSE vs FE2 pace at every track

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Series
Reference · what % is measured against, 9 events
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1:401:502:002:105 rule changes between Runoffs 2018 and Runoffs 20195 ▾3 rule changes between Runoffs 2019 and Runoffs 20203 ▾1 rule change between Runoffs 2020 and Runoffs 20211 ▾2 rule changes between Runoffs 2021 and Runoffs 20222 ▾5 rule changes between Runoffs 2023 and Runoffs 20245 ▾2 rule changes between Runoffs 2024 and Runoffs 20252 ▾4 rule changes between Runoffs 2025 and Runoffs 20264 ▾FE2 race best at Runoffs 2018: 1:35.563 (Flinn Lazier)FE2 race best at Runoffs 2019: 1:52.154 (Liam Snyder)FE2 race best at Runoffs 2020: 2:13.271 (Owen McAllister)FE2 race best at Runoffs 2021: 1:36.655 (Max Grau)FE2 race best at Runoffs 2022: 2:12.045 (Jason Conzo)FE2 race best at Runoffs 2023: 1:51.098 (Franklin Futrelle)FE2 race best at Runoffs 2024: 2:12.748 (Porter Aiken)FE2 race best at Runoffs 2025: 2:13.339 (Franklin Futrelle)FE2 race best at Runoffs 2026: 2:11.881 (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 1:35.040 (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 1:51.062 (Liam Snyder)FE2 qualifying best at Runoffs 2020: 2:12.806 (Scott Rettich)FE2 qualifying best at Runoffs 2021: 1:36.395 (Max Grau)FE2 qualifying best at Runoffs 2022: 1:50.853 (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 1:50.665 (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 2:11.506 (Porter Aiken)FE2 qualifying best at Runoffs 2025: 2:12.475 (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 2:12.326 (Franklin Futrelle)Sonoma Raceway · Runoffs 2018Runoffs2018Virginia International Raceway · Runoffs 2019Runoffs2019Road America · Runoffs 2020Runoffs2020Indianapolis Motor Speedway · Runoffs 2021Runoffs2021Virginia International Raceway · Runoffs 2022Runoffs2022Virginia International Raceway · Runoffs 2023Runoffs2023Road America · Runoffs 2024Runoffs2024Road America · Runoffs 2025Runoffs2025Road America · Runoffs 2026Runoffs2026
CFCITRSMSEFE2solid race · dashed qualifying · slower is lower
EventCFCITRSMSEFE2
Qual best Race best Trap Qual best Race best Trap vs CFC Qual best Race best Trap vs CFC Qual best Race best Trap vs CFC 
Road America Runoffs 20262026-09-282:12.326Franklin Futrelle · fastest of 8 · top 5 within 1.9s-0.149s (-0.11%)2:11.881Franklin Futrelle · fastest of 8 · top 5 within 1.6s-1.458s (-1.09%)143.5Steve Whitston-5.5 mph (-3.7%)
4 rule changes (ITR: 3, FE2: 1)2 weight · 1 induction · 1 othershowhide
  • ITR E&O: Turbo Cars in IT #39691induction
  • ITR Correct Response to Letter 38971 in October Tech Bulletin #39105weight
  • FE2 FE & FE2 Bubble Tail #38978other
  • ITR NASA Spec3 to ITR #38971weight
Road America Runoffs 20252025-09-292:12.475Franklin Futrelle · fastest of 11 · top 5 within 1.4s+0.969s (+0.74%)2:13.339Franklin Futrelle · fastest of 10 · top 5 within 0.6s+0.591s (+0.45%)149.0Steve Whitston+3.7 mph (+2.6%)
2 rule changes (ITR: 1, FE2: 1)2 othershowhide
  • FE2 Driver Safety & Comfort #37965other
  • ITR Combine RX8 Spec Lines in ITR #37383other
Road America Runoffs 20242024-10-012:11.506Porter Aiken · fastest of 18 · top 5 within 0.5s-1.300s (-0.98%)2:12.748Porter Aiken · fastest of 17 · top 5 within 2.0s-0.523s (-0.39%)145.3Porter Aiken+1.9 mph (+1.3%)
5 rule changes (ITR: 5)2 cars added · 2 weight · 1 inductionshowhide
  • ITR Battery Change #35854weight
  • ITR Request to classify BMW 325XIT #33889cars added
  • ITR car classification #35263cars added
  • ITR ADJUST WEIGHTS ON ITR CARS #35334weight -122 lbs
  • ITR TIR for Turbo cars in TIR #33856induction
Virginia International Raceway Runoffs 20232023-09-231:50.665Charles Russell Turner · fastest of 26 · top 5 within 2.3s-0.188s (-0.17%)1:51.098Franklin Futrelle · fastest of 19 · top 5 within 1.4s-20.947s (-15.86%)141.3Franklin Futrelle-0.6 mph (-0.4%)
No rule changes on record between these events
Virginia International Raceway Runoffs 20222022-09-241:50.853Charles Russell Turner · fastest of 25 · top 5 within 1.1s-0.209s (-0.19%)2:12.045Jason Conzo · fastest of 22 · top 5 within 1.8s+19.891s (+17.74%)141.9Eric Cruz-0.6 mph (-0.5%)
2 rule changes (ITR: 2)1 cars added · 1 inductionshowhide
  • ITR Request to classify 93 Talon TSI AWD #31727cars added
  • ITR Class Turbo Cars #29774induction
Indianapolis Motor Speedway Runoffs 20212021-09-251:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler
1 rule change (ITR: 1)1 cars addedshowhide
  • ITR Request to classify a 2003 Honda Accord #28898cars added
Road America Runoffs 20202020-10-022:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister
3 rule changes (ITR: 1, FE2: 2)1 tyres & wheels · 1 weight · 1 wordingshowhide
  • FE2 FE/FE2 Oil Cooler #29293wording
  • ITR Cleanup 4.f Traction control #28609tyres & wheels
  • FE2 FE / FE2 Update Rules #27624weight
Virginia International Raceway Runoffs 20192019-10-051:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman
5 rule changes (ITR: 5)2 cars added · 2 weight · 1 inductionshowhide
  • 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
Sonoma Raceway Runoffs 20182018-10-101:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich

By track

TrackEvents 
Road America4
Virginia International Raceway3
Indianapolis Motor Speedway1
Sonoma 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.