BoP Lab / Classes / SRF

SRF pace at every track

Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), 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.

Class · click a class to switch, + to compare alongside (up to 4)

Series Runoffs Super Tour Both

Reference · what % is measured against, 3 eventsall classes that day, as if at an average track

Tracks · untick to narrow Auto Club Speedway Blackhawk Farms Raceway Buttonwillow Raceway Park Circuit of St. Louis (formerly Gateway Motorsports Circuit of the Americas Daytona International Speedway Grattan Raceway Hallett Motor Racing Circuit Homestead-Miami Speedway Indianapolis Motor Speedway Michelin Raceway Road Atlanta Mid-Ohio Sports Car Course New Jersey Motorsports Park NOLA Motorsports Park Pacific Raceways Pittsburgh International Race Complex Portland International Raceway Pueblo Motorsports Park Road America Sebring International Raceway Summit Point Raceway Thunderhill Raceway Park Virginia International Raceway Watkins Glen International Willow Springs Raceway

Closest to the field: SRF 96.1% of the field Thomas Kirchman, Indianapolis Motor Speedway Runoffs 2017 qualifying

% of the fieldLap times

SRFsolid race · dashed qualifying · slower is lowerDaytona International SpeedwayIndianapolis Motor SpeedwayMid-Ohio Sports Car Course

SRFsolid race · dashed qualifying · each class's best lap as a share of the field's at the same event (the field index, changeable above); 100% is level, less is quicker, so up the chart is quickerDaytona International SpeedwayIndianapolis Motor SpeedwayMid-Ohio Sports Car Course

	Event	SRF
	Event	Qual best	Race best	Trap	% of the field
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:51.573Thomas Kirchman · fastest of 50 · top 5 within 2.8s	1:53.769Todd Harris · fastest of 45 · top 5 within 0.2s		97.2%qual 96.1%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:37.344Mike Miserendino · fastest of 27 · top 5 within 0.8s	1:37.621Todd Harris · fastest of 27 · top 5 within 0.6s		97.5%qual 98.4%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	2:14.306Cliff White · fastest of 39 · top 5 within 1.2s	2:16.700Cliff White · fastest of 38 · top 5 within 0.5s		98.4%qual 97.6%

By track

Track	Events	Typical % of the field	Best	Latest
Daytona International Speedway	1	98.4%	98.4%Runoffs 2015	98.4%Runoffs 2015
Indianapolis Motor Speedway	1	97.2%	97.2%Runoffs 2017	97.2%Runoffs 2017
Mid-Ohio Sports Car Course	1	97.5%	97.5%Runoffs 2016	97.5%Runoffs 2016

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 field's best on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks): the weather and the day cancel out, so one figure compares across years where lap times cannot, and across tracks too, since the class's own character at each track is taken out. A track with only one or two events on record is corrected less, since there is less to go on. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.