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BoP Lab / Classes / CFC

CFC vs ITR vs S7 vs SMX pace at every track

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Reference · what % is measured against, 4 events
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2:102:202:302:409 rule changes between Runoffs 2023 and Runoffs 20249 ▾6 rule changes between Runoffs 2024 and Runoffs 20256 ▾5 rule changes between Runoffs 2025 and Runoffs 20265 ▾SMX race best at Runoffs 2023: 2:12.616 (Noah Harmon)SMX race best at Runoffs 2024: 2:36.278 (Ethan Jacobs)SMX race best at Runoffs 2025: 2:37.091 (Michael Tinis)SMX race best at Runoffs 2026: 2:36.414 (Cam Ebben)SMX qualifying best at Runoffs 2023: 2:11.435 (Nathan Nicholson)SMX qualifying best at Runoffs 2024: 2:35.651 (Ethan Lampe)SMX qualifying best at Runoffs 2025: 2:36.232 (Cam Ebben)SMX qualifying best at Runoffs 2026: 2:36.472 (Skyler Cottrell)Virginia International Raceway · Runoffs 2023Runoffs2023Road America · Runoffs 2024Runoffs2024Road America · Runoffs 2025Runoffs2025Road America · Runoffs 2026Runoffs2026
CFCITRS7SMXsolid race · dashed qualifying · slower is lower
EventCFCITRS7SMX
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 20262026-09-282:36.472Skyler Cottrell · fastest of 21 · top 5 within 0.4s+0.240s (+0.15%)2:36.414Cam Ebben · fastest of 21 · top 5 within 1.1s-0.677s (-0.43%)128.4Christian Hoagland-0.6 mph (-0.5%)
5 rule changes (ITR: 3, SMX: 2)2 weight · 1 induction · 1 wording · 1 othershowhide
  • SMX Rear Toe Link #40271other
  • SMX Part Number Change Request #39914wording
  • ITR E&O: Turbo Cars in IT #39691induction
  • ITR Correct Response to Letter 38971 in October Tech Bulletin #39105weight
  • ITR NASA Spec3 to ITR #38971weight
Road America Runoffs 20252025-09-292:36.232Cam Ebben · fastest of 20 · top 5 within 0.2s+0.581s (+0.37%)2:37.091Michael Tinis · fastest of 19 · top 5 within 0.3s+0.813s (+0.52%)129.1Camden Gruber-0.4 mph (-0.3%)
6 rule changes (ITR: 1, SMX: 5)1 tyres & wheels · 1 wording · 4 othershowhide
  • SMX SMX Data Submission - Penalties #38248other
  • SMX SMX Penaly Clarification updated language #38337wording
  • SMX Clarify Tire Marking Regs #38004tyres & wheels
  • SMX SMX Data Submission Timeframe #38039other
  • ITR Combine RX8 Spec Lines in ITR #37383other
  • SMX E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
Road America Runoffs 20242024-10-012:35.651Ethan Lampe · fastest of 23 · top 5 within 0.7s2:36.278Ethan Jacobs · fastest of 22 · top 5 within 0.7s129.5Michael Borden
9 rule changes (ITR: 5, SMX: 4)2 cars added · 2 weight · 1 engine · 1 induction · 1 suspension & brakes · 1 wording · 1 othershowhide
  • SMX SMX Camera Rule Correction #36496wording
  • SMX AIM ECU Protocol #36556engine
  • SMX OE versus OEM Definitons #36608other
  • SMX Shifter Bushing #36611suspension & brakes
  • 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 20232023-09-232:11.435Nathan Nicholson · fastest of 18 · top 5 within 0.6s2:12.616Noah Harmon · fastest of 16 · top 5 within 0.1s127.8Noah Harmon
9 earlier rule changes on record, in force before Runoffs 2023 (from 2019)4 cars added · 2 induction · 2 weight · 1 tyres & wheelsshowhide
  • ITR Request to classify 93 Talon TSI AWD #31727cars added
  • ITR Class Turbo Cars #29774induction
  • ITR Request to classify a 2003 Honda Accord #28898cars added
  • ITR Cleanup 4.f Traction control #28609tyres & wheels
  • 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 
Road America3
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.