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FE vs STL vs SM pace at every track

Lap times across years say as much about the weather as the class. % of FE is each class's best lap as a share of FE's on the same day, 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+FE×FE2+FF+FP+FV+FX+GT1+GT2+GTX+HP+P+P2+vsSM×SMX+SRF3+vsSTL×STU+T1+T2+T3+T4+Show 50 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: FE 100.0% of FE Scott Rettich, Daytona International Speedway Runoffs 2015 race · STL 106.7% of FE Kevin Boehm, Mid-Ohio Sports Car Course Runoffs 2016 race · SM 111.3% of FE Michael Carter, Mid-Ohio Sports Car Course Runoffs 2016 race

1:402:002:202:4020 rule changes between Runoffs 2018 and Runoffs 201920 ▾18 rule changes between Runoffs 2019 and Runoffs 202018 ▾20 rule changes between Runoffs 2020 and Runoffs 202120 ▾10 rule changes between Runoffs 2021 and Runoffs 202210 ▾6 rule changes between Runoffs 2022 and Runoffs 20236 ▾13 rule changes between Runoffs 2023 and Runoffs 202413 ▾9 rule changes between Runoffs 2024 and Runoffs 20259 ▾8 rule changes between Runoffs 2025 and Runoffs 20268 ▾FE race best at Runoffs 2015: 1:59.040 (Scott Rettich)FE race best at Runoffs 2016: 1:30.563 (Hanna Zellers)FE race best at Runoffs 2017: 1:39.726 (Elliot Finlayson)FE race best at Runoffs 2018: 1:38.504 (Lee Rackley)FE race best at Runoffs 2019: 1:55.648 (Mark Snyder)FE qualifying best at Runoffs 2015: 1:57.824 (Scott Rettich)FE qualifying best at Runoffs 2016: 1:27.636 (Scott Rettich)FE qualifying best at Runoffs 2017: 1:39.177 (Elliot Finlayson)FE qualifying best at Runoffs 2018: 1:37.517 (Mark Snyder)FE qualifying best at Runoffs 2019: 1:54.710 (Mark Snyder)STL race best at Runoffs 2015: 2:10.269 (Kevin Boehm)STL race best at Runoffs 2016: 1:36.625 (Kevin Boehm)STL race best at Runoffs 2017: 1:52.589 (Eric Kutil)STL race best at Runoffs 2018: 1:49.754 (Danny Steyn)STL race best at Runoffs 2019: 2:07.273 (Cliff Ira)STL race best at Runoffs 2020: 2:32.115 (Joe Moser)STL race best at Runoffs 2021: 2:02.711 (Joe Moser)STL race best at Runoffs 2022: 2:07.832 (Danny Steyn)STL race best at Runoffs 2023: 2:06.682 (Joe Moser)STL race best at Runoffs 2024: 2:30.245 (Joe Moser)STL race best at Runoffs 2025: 2:32.127 (Jose Osiris Pena)STL race best at Runoffs 2026: 2:30.657 (Danny Steyn)STL qualifying best at Runoffs 2015: 2:09.672 (Kevin Boehm)STL qualifying best at Runoffs 2016: 1:35.439 (John Schmitt)STL qualifying best at Runoffs 2017: 1:52.647 (Adam Roberts)STL qualifying best at Runoffs 2018: 1:49.138 (Danny Steyn)STL qualifying best at Runoffs 2019: 2:07.203 (Danny Steyn)STL qualifying best at Runoffs 2020: 2:31.420 (Danny Steyn)STL qualifying best at Runoffs 2021: 1:51.665 (Danny Steyn)STL qualifying best at Runoffs 2022: 2:05.474 (Danny Steyn)STL qualifying best at Runoffs 2023: 2:05.779 (Danny Steyn)STL qualifying best at Runoffs 2024: 2:30.063 (Joe Moser)STL qualifying best at Runoffs 2025: 2:32.065 (Jose Osiris Pena)STL qualifying best at Runoffs 2026: 2:30.537 (Derek Ketchie)SM race best at Runoffs 2015: 2:24.067 (Todd Lamb)SM race best at Runoffs 2016: 1:40.764 (Michael Carter)SM race best at Runoffs 2017: 1:59.100 (Michael Gagliardo)SM race best at Runoffs 2018: 1:55.278 (Michael Carter)SM race best at Runoffs 2019: 2:16.459 (Elivan Goulart)SM race best at Runoffs 2020: 2:43.748 (Preston Pardus)SM race best at Runoffs 2021: 1:58.837 (Brian Henderson)SM race best at Runoffs 2022: 2:19.107 (Travis Wiley)SM race best at Runoffs 2023: 2:16.229 (Julian DaCosta)SM race best at Runoffs 2024: 2:41.486 (Brett Kowalski)SM race best at Runoffs 2025: 2:44.430 (Kyle Greenhill)SM race best at Runoffs 2026: 2:42.725 (Francisco Barroso)SM qualifying best at Runoffs 2015: 2:18.661 (Andrew Carbonell)SM qualifying best at Runoffs 2016: 1:40.514 (Justin Hille)SM qualifying best at Runoffs 2017: 1:58.306 (Chris Haldeman)SM qualifying best at Runoffs 2018: 1:54.355 (Ken Sutherland)SM qualifying best at Runoffs 2019: 2:14.552 (Todd Buras)SM qualifying best at Runoffs 2020: 2:42.209 (Kyle Greenhill)SM qualifying best at Runoffs 2021: 1:57.695 (Brian Henderson)SM qualifying best at Runoffs 2022: 2:14.664 (Danny Steyn)SM qualifying best at Runoffs 2023: 2:14.986 (Danny Steyn)SM qualifying best at Runoffs 2024: 2:41.106 (Ethan Goulart)SM qualifying best at Runoffs 2025: 2:43.111 (Bobby Gossett)SM qualifying best at Runoffs 2026: 2:42.173 (Brett Kowalski)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
FESTLSMsolid race · dashed qualifying · slower is lower
100%105%110%115%120%20 rule changes between Runoffs 2018 and Runoffs 201920 ▾18 rule changes between Runoffs 2019 and Runoffs 202018 ▾20 rule changes between Runoffs 2020 and Runoffs 202120 ▾10 rule changes between Runoffs 2021 and Runoffs 202210 ▾6 rule changes between Runoffs 2022 and Runoffs 20236 ▾13 rule changes between Runoffs 2023 and Runoffs 202413 ▾9 rule changes between Runoffs 2024 and Runoffs 20259 ▾8 rule changes between Runoffs 2025 and Runoffs 20268 ▾FE race best at Runoffs 2015: 100.0% of FE's (Scott Rettich)FE race best at Runoffs 2016: 100.0% of FE's (Hanna Zellers)FE race best at Runoffs 2017: 100.0% of FE's (Elliot Finlayson)FE race best at Runoffs 2018: 100.0% of FE's (Lee Rackley)FE race best at Runoffs 2019: 100.0% of FE's (Mark Snyder)FE qualifying best at Runoffs 2015: 100.0% of FE's (Scott Rettich)FE qualifying best at Runoffs 2016: 100.0% of FE's (Scott Rettich)FE qualifying best at Runoffs 2017: 100.0% of FE's (Elliot Finlayson)FE qualifying best at Runoffs 2018: 100.0% of FE's (Mark Snyder)FE qualifying best at Runoffs 2019: 100.0% of FE's (Mark Snyder)STL race best at Runoffs 2015: 109.4% of FE's (Kevin Boehm)STL race best at Runoffs 2016: 106.7% of FE's (Kevin Boehm)STL race best at Runoffs 2017: 112.9% of FE's (Eric Kutil)STL race best at Runoffs 2018: 111.4% of FE's (Danny Steyn)STL race best at Runoffs 2019: 110.1% of FE's (Cliff Ira)STL qualifying best at Runoffs 2015: 110.1% of FE's (Kevin Boehm)STL qualifying best at Runoffs 2016: 108.9% of FE's (John Schmitt)STL qualifying best at Runoffs 2017: 113.6% of FE's (Adam Roberts)STL qualifying best at Runoffs 2018: 111.9% of FE's (Danny Steyn)STL qualifying best at Runoffs 2019: 110.9% of FE's (Danny Steyn)SM race best at Runoffs 2015: 121.0% of FE's (Todd Lamb)SM race best at Runoffs 2016: 111.3% of FE's (Michael Carter)SM race best at Runoffs 2017: 119.4% of FE's (Michael Gagliardo)SM race best at Runoffs 2018: 117.0% of FE's (Michael Carter)SM race best at Runoffs 2019: 118.0% of FE's (Elivan Goulart)SM qualifying best at Runoffs 2015: 117.7% of FE's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 114.7% of FE's (Justin Hille)SM qualifying best at Runoffs 2017: 119.3% of FE's (Chris Haldeman)SM qualifying best at Runoffs 2018: 117.3% of FE's (Ken Sutherland)SM qualifying best at Runoffs 2019: 117.3% of FE's (Todd Buras)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
FESTLSMsolid race · dashed qualifying · each class's best lap as a share of FE's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFESTLSM
Qual best Race best Trap Qual best Race best Trap vs FE % of FE Qual best Race best Trap vs FE % of FE 
Road America Runoffs 20262026-09-282:30.537Derek Ketchie · fastest of 16 · top 5 within 2.9s-1.528s (-1.00%)2:30.657Danny Steyn · fastest of 16 · top 5 within 0.6s-1.470s (-0.97%)134.8Mike Taylor+2.6 mph (+2.0%)2:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)
8 rule changes (FE: 2, STL: 4, SM: 2)3 weight · 1 engine · 1 removed · 1 wording · 2 othershowhide
  • SM Rear Toe Link #40271other
  • STL Spec Line Clean Up #40344removed
  • STL Calculating Weight #40224weight
  • SM Part Number Change Request #39914wording
  • STL Classifications #39885weight
  • FE FE & FE2 Rule Updates #39484engine
  • STL Weight adjustment for STL #39579weight
  • FE FE & FE2 Bubble Tail #38978other
Road America Runoffs 20252025-09-292:32.065Jose Osiris Pena · fastest of 14 · top 5 within 3.4s+2.002s (+1.33%)2:32.127Jose Osiris Pena · fastest of 13 · top 5 within 2.4s+1.882s (+1.25%)132.2Jon Sewell-2.1 mph (-1.5%)2:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)119.3Francisco Barroso-0.6 mph (-0.5%)
9 rule changes (FE: 2, STL: 3, SM: 4)3 weight · 2 tyres & wheels · 1 suspension & brakes · 1 wording · 2 othershowhide
  • FE FE & FE2 Rule Updates #38901weight
  • STL Lotus Weight Reduction #38772weight -50 lbs
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • STL E&O: SMX Allowance in STL #37945weight
  • FE Brake Line to A-Arm Covers #37110suspension & brakes
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • STL Request to Remove Miata Hubs from General category #37138tyres & wheels
Road America Runoffs 20242024-10-012:30.063Joe Moser · fastest of 18 · top 5 within 3.7s-1.357s (-0.90%)2:30.245Joe Moser · fastest of 16 · top 5 within 4.2s-1.870s (-1.23%)134.3Joe Moser+1.3 mph (+1.0%)2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)119.9Alex Bertagnoli-1.4 mph (-1.2%)
13 rule changes (FE: 5, STL: 4, SM: 4)2 induction · 2 tyres & wheels · 1 engine · 1 suspension & brakes · 1 weight · 2 wording · 4 othershowhide
  • FE Protest Fee Clarification #36540wording
  • FE Update on Letter 36620 with new Hoosier Contingency Decal Info #36625tyres & wheels
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • FE Hoosier Tire Decal Placement #36435tyres & wheels
  • STL ST Electric-Assisted Steering Systems #35066other
  • STL BOP Adjustments #35112weight
  • STL Mazda 12A #35320induction
  • FE Update FE Rain Light Rule #34707other
  • FE FE/FE2 rule update #35269other
  • STL Alternate Carburetor Request for 79-85 RX7 12a #35181induction
Virginia International Raceway Runoffs 20232023-09-232:05.779Danny Steyn · fastest of 22 · top 5 within 3.4s+0.305s (+0.24%)2:06.682Joe Moser · fastest of 20 · top 5 within 1.5s-1.150s (-0.90%)131.8Danny Steyn+0.1 mph (+0.1%)2:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)120.3Jim Drago+1.1 mph (+0.9%)
6 rule changes (FE: 3, STL: 2, SM: 1)2 tyres & wheels · 1 aero · 1 suspension & brakes · 1 weight · 1 othershowhide
  • STL Clarify STL table B - IT spec notes on Tires #34187tyres & wheels
  • FE Update FE SADEV Transmission Rule #33883other
  • SM BOP for NB1 and NB2 #32309weight
  • STL Spec MX5 in STL #33473tyres & wheels
  • FE Brake bias adjuster clarification #33084suspension & brakes
  • FE FE Front and Rear Wing Update & Clarification #33089aero
Virginia International Raceway Runoffs 20222022-09-242:05.474Danny Steyn · fastest of 24 · top 5 within 2.3s-1.729s (-1.36%)2:07.832Danny Steyn · fastest of 22 · top 5 within 1.9s+0.559s (+0.44%)131.7Trever Degioanni-3.2 mph (-2.3%)2:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)119.2Jonathan Neudorf-0.6 mph (-0.5%)
10 rule changes (FE: 4, STL: 5, SM: 1)2 engine · 2 induction · 2 tyres & wheels · 1 suspension & brakes · 1 weight · 1 wording · 1 othershowhide
  • FE Engine Heat Shield & Insulation #33019engine
  • FE Update FE/FE2 Tire Rule #32613tyres & wheels
  • FE Master cylinder clarification #32669engine
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • STL Single TB Weight Modifiers #31449weight
  • STL Improved Touring Tires #32063tyres & wheels
  • STL Throttling Device Clarification #31323induction
  • STL Mazda Renesis Restriction #31467induction
  • STL Clarification of 79-85 RX7 Spec line #31621wording
  • FE Two FE2 Rule Updates #31524other
Indianapolis Motor Speedway Runoffs 20212021-09-251:51.665Danny Steyn · fastest of 42 · top 5 within 1.7s-0.982s (-0.87%)2:02.711Joe Moser · fastest of 37 · top 5 within 3.2s+10.122s (+8.99%)131.8Max Gee1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)119.8Kyle Greenhill
20 rule changes (FE: 4, STL: 15, SM: 1)3 suspension & brakes · 2 aero · 2 engine · 2 induction · 2 tyres & wheels · 2 weight · 1 cars added · 2 wording · 4 othershowhide
  • STL Request to clean up Spec MX-5 Redundancy #31069other
  • FE FE Tire Rule Changes #30754tyres & wheels
  • FE Radiator Screens Clarification #30792wording
  • FE FE Radiator Screens #30575other
  • STL VW Engine Request #30625engine
  • STL Solstice Ride Height #30183suspension & brakes
  • STL Request Mazda B5 DOHC #30420cars added
  • STL Honda B16A (JDM) Restrictor change #30531induction
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • STL ST Oil Coolers E&O Correction to 9.1.4.2.H #30388wording
  • STL GM Ecotec engines in STL #30247engine
  • STL Super Touring Alternate Miata Hubs #30345tyres & wheels
  • STL Brake Component Relocation #29990suspension & brakes
  • STL Super Touring Wing Clarification #30111aero
  • STL Transmission Options #30118other
  • STL Request for FWD and RWD Parity #29728weight
  • STL Request to Remove Honda F20C 2% Weight Penalty #29815weight
  • STL Request for FWD and RWD Parity #30023induction
  • FE FE / FE2 Spring Updates #29689suspension & brakes
  • STL Request clarification on wing measurement #29640aero
Road America Runoffs 20202020-10-022:31.420Danny Steyn · fastest of 33 · top 5 within 3.1s2:32.115Joe Moser · fastest of 30 · top 5 within 1.5s132.9Darin Treakle2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill
18 rule changes (FE: 5, STL: 11, SM: 2)4 induction · 3 aero · 3 engine · 3 weight · 2 suspension & brakes · 1 cars added · 1 tyres & wheels · 1 wordingshowhide
  • FE FE Gurney Flap Spec Update #29445aero
  • SM Radiator E&O Clarifications #29294engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • STL Minimum Weight Determination #27695weight
  • STL ST Gurney flap Wicker clarification #29012aero
  • STL Request for Addition to GT3 Approved Turbo List #27576induction
  • FE FE Gurney flap wicker clarification #28885aero
  • STL Request to add 2016-2019 GMX-5 Spec line #28604cars added
  • STL Request to update PN for MX-5 #28622wording
  • STL Correction - Clarification Honda/Acura B18B engine Letter # 26209 #28873engine
  • FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes
  • STL STL Honda B18 restrictor changes #28794induction
  • STL Change GM LNF 2.0 Allowance to LSJ Engine for Viable STL 2.0 #27884engine
  • STL Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat #28663induction
  • STL Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53 #28664induction
  • STL Request to add wheel part numbers #28342tyres & wheels
  • FE Request for FE / FE2 preparation rules update #27722weight
  • FE FE / FE2 Update Rules #27624weight
Virginia International Raceway Runoffs 20192019-10-051:54.710Mark Snyder · fastest of 9 · top 5 within 1.3s1:55.648Mark Snyder · fastest of 9 · top 5 within 0.9s135.5James Libecco2:07.203Danny Steyn · fastest of 36 · top 5 within 1.8s2:07.273Cliff Ira · fastest of 35 · top 5 within 1.4s134.8Cliff Ira+11.625squal +12.493s110.1%qual 110.9%2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago+20.811squal +19.842s118.0%qual 117.3%
20 rule changes (FE: 5, STL: 11, SM: 4)5 weight · 4 tyres & wheels · 3 suspension & brakes · 2 engine · 2 induction · 1 cars added · 2 wording · 1 othershowhide
  • FE FE Wet Tire E&O #27365tyres & wheels
  • STL Request to Classify Spec MX-5 Challenge in STL #27399cars added
  • FE FE Tire Update #27029tyres & wheels
  • STL Request clarification for manifold and throttle in STU #27004induction
  • FE FE Anti-Roll Bar Clarification #26912suspension & brakes
  • FE FE / FE2 Updated Bubble Tail Rule #26913other
  • STL Request Restrictor Plate correction #26779induction
  • STL Request Ride Height Clarification #26597suspension & brakes
  • FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
  • SM Request to allow aftermarket fuel filters. #26370wording
  • STL Request to Allow VW 1.8L Engine #25614engine
  • STL Request to reduce weight of RX8 with Renesis rotary #25781weight -100 lbs
  • STL Request for Open Brake Pads On Mazda MX-5 Cup NC #25821suspension & brakes
  • STL Request to clarify B18C1 GSR Honda B motor table #26209weight
  • STL Port Matching #26415wording
  • SM Request 99-00 replacement Wire harnesses #25602engine
  • SM Organize and Clarify 9.1.7.C.1.o. #25913weight
  • SM Strike Tire Tread Language #26123tyres & wheels
  • STL Request to equalize FPR Reduction on all B-Series Vtec Engines #24746weight
  • STL Request E&O for Mazda Miata Spec Line #25955weight
Sonoma Raceway Runoffs 20182018-10-101:37.517Mark Snyder · fastest of 10 · top 5 within 1.4s1:38.504Lee Rackley · fastest of 10 · top 5 within 0.8s124.7Quinten Nelson1:49.138Danny Steyn · fastest of 19 · top 5 within 2.5s1:49.754Danny Steyn · fastest of 17 · top 5 within 2.5s103.2Craig McHaffie+11.250squal +11.621s111.4%qual 111.9%1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn+16.774squal +16.838s117.0%qual 117.3%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:39.177Elliot Finlayson · fastest of 35 · top 5 within 1.3s1:39.726Elliot Finlayson · fastest of 35 · top 5 within 0.8s1:52.647Adam Roberts · fastest of 57 · top 5 within 0.8s1:52.589Eric Kutil · fastest of 50 · top 5 within 1.2s+12.863squal +13.470s112.9%qual 113.6%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+19.374squal +19.129s119.4%qual 119.3%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:27.636Scott Rettich · fastest of 9 · top 5 within 1.7s1:30.563Hanna Zellers · fastest of 9 · top 5 within 2.2s1:35.439John Schmitt · fastest of 34 · top 5 within 1.5s1:36.625Kevin Boehm · fastest of 31 · top 5 within 0.6s+6.062squal +7.803s106.7%qual 108.9%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+10.201squal +12.878s111.3%qual 114.7%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:57.824Scott Rettich · fastest of 16 · top 5 within 1.0s1:59.040Scott Rettich · fastest of 16 · top 5 within 1.3s2:09.672Kevin Boehm · fastest of 37 · top 5 within 2.5s2:10.269Kevin Boehm · fastest of 37 · top 5 within 2.1s+11.229squal +11.848s109.4%qual 110.1%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+25.027squal +20.837s121.0%qual 117.7%

By track

TrackEvents Typical % of FE Best Latest 
Road America40 of 4 with FE
Virginia International Raceway3100.0%1 of 3 with FE100.0%Runoffs 2019100.0%Runoffs 2019
Indianapolis Motor Speedway2100.0%1 of 2 with FE100.0%Runoffs 2017100.0%Runoffs 2017
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%Runoffs 2018
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 FE'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.