BoP Lab / Virginia International Raceway

GT3U vs SRF3 pace at Virginia International Raceway

Quickest here: SRF3 2:03.716 Franklin Futrelle, Runoffs 2022 qualifying

GT3USRF3solid race · dashed qualifying · slower is lower

	Event	GT3U			SRF3
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs GT3U
	Runoffs 2023 ROFF232023-09-23					2:04.911David Ogburn · fastest of 39 · top 5 within 0.3s-17.155s (-12.08%)	133.5Sal Webber-1.0 mph (-0.7%)
4 rule changes (SRF3: 4)2 tyres & wheels · 1 suspension & brakes · 1 wording · SRF Hoosier wet front tire updated to P/N 46100 P185/60R13 H20 or W2. · SRF Hoosier front rain tyre part number changes from 46100 to 46101 P185/65R13 W2. · SRF Renault Alliance solid front rotors banned; restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weight increased to 1100 lbs for 2009+ stock engines. · SRF3 tail sections allowed on SRFs with GEN3 airbox shimming up to 19 mm; alternate dash panel P/N 180100 or 180101 relocated in rules.showhide 2023-06-01 SRF3 Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheelsunclearSRF Hoosier wet front tire updated to P/N 46100 P185/60R13 H20 or W2. 2023-05-01 SRF3 Update SRF Front W2 Rain Tire Part Number #34118tyres & wheelsneutralSRF Hoosier front rain tyre part number changes from 46100 to 46101 P185/65R13 W2. 2023-03-01 SRF3 Update SRF Brake Rule #33469suspension & brakesslowerSRF Renault Alliance solid front rotors banned; restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weight increased to 1100 lbs for 2009+ stock engines. 2023-03-01 SRF3 Update SRF Bodywork Fitment Rule #33765wordingneutralSRF3 tail sections allowed on SRFs with GEN3 airbox shimming up to 19 mm; alternate dash panel P/N 180100 or 180101 relocated in rules.
	Runoffs 2022 ROFF222022-09-24				2:03.716Franklin Futrelle · fastest of 44 · top 5 within 0.6s-0.908s (-0.73%)	2:22.066Franklin Futrelle · fastest of 40 · top 5 within 1.2s+17.311s (+13.88%)	134.5David Ogburn+2.1 mph (+1.6%)
16 rule changes (SRF3: 16)3 suspension & brakes · 3 tyres & wheels · 1 cars added · 1 engine · 1 weight · 7 wording · SRF tire rule wording changed from 'Tires: must be run as delivered' to 'Tires must be run as delivered.' · SRF brake rotor minimum thickness reduced from 13.25 to 12.20mm; seal and air filter rules clarified. · SRF front wet tire changes from P185/60R13 H20 to P185/65R13 W2; SRF3 adds mandatory G301048 restrictor plate Jan. 1, 2022. · SRF wet tyres add Hoosier P185/60R13 W2 front and P205/60R13 W2 rear as alternatives to H20. · SRF adds SADEV-SRF3 6-speed sequential option with final drive 3.20 versus OEM 5-speed 3.85. · SRF seal procedures clarified: unsealed components need CSR inspection and logbook notation instead of engine removal. · SRF3 alternator pulley restricted to P/N G902130 or G902130A, 12oz minimum weight. · SRF and SRF3 mandatory identification simplified: removed Ford Performance and Blue Oval decals, kept Hoosier logo placement. · SRF shocks, springs, bump stops sealed; rear springs 412-429 lbs/in P/N 280390 only; previous parts no longer allowed. · SRF3 shock absorber brand restriction removed; all shocks must be sealed by Enterprises. · SRF3 bump stop now must be SCCA P/N 280407 only, no modifications, optional, max one per shock. · SRF shock absorber bump stop clarified: only SCCA P/N 280407 allowed as delivered, maximum one per shock, effective 05/01/2020. · SRF rain and brake rule wording updated; supersedes GCR 9.3.32.B.2 effective 1/1/202 through 12/31/2024. · SRF bans tire warmers and cooling methods other than natural air convection or conduction. · SRF front nose weight minimum reduced from 35 to 32 lbs. · SRF3 reclassified as Spec Racer Ford 3 with 1.6L conversion; SRF2 becomes Regional Only Class.showhide 2022-06-01 SRF3 SRF Tire Rule Update #32614wordingneutralSRF tire rule wording changed from 'Tires: must be run as delivered' to 'Tires must be run as delivered.' 2022-06-01 SRF3 Brake, seal, and air filter clarifications #32670suspension & brakesfasterSRF brake rotor minimum thickness reduced from 13.25 to 12.20mm; seal and air filter rules clarified. 2021-12-01 SRF3 Three Updates to SRF Rules #31523tyres & wheelsunclearSRF front wet tire changes from P185/60R13 H20 to P185/65R13 W2; SRF3 adds mandatory G301048 restrictor plate Jan. 1, 2022. 2021-08-01 SRF3 SRF Wet Tires #30849tyres & wheelsneutralSRF wet tyres add Hoosier P185/60R13 W2 front and P205/60R13 W2 rear as alternatives to H20. 2021-08-01 SRF3 SADEV-SRF3 Transmission #30926cars addedunclearSRF adds SADEV-SRF3 6-speed sequential option with final drive 3.20 versus OEM 5-speed 3.85. 2021-08-01 SRF3 SRF Update Maintenance, Repairs and Seals #30961wordingneutralSRF seal procedures clarified: unsealed components need CSR inspection and logbook notation instead of engine removal. 2021-06-01 SRF3 SRF3 Alternator Pulley #30684engineslowerSRF3 alternator pulley restricted to P/N G902130 or G902130A, 12oz minimum weight. 2021-03-01 SRF3 Mandatory identification: #30223wordingneutralSRF and SRF3 mandatory identification simplified: removed Ford Performance and Blue Oval decals, kept Hoosier logo placement. 2020-12-01 SRF3 SRF Shocks, Springs and Ride Height. #29688suspension & brakesneutralSRF shocks, springs, bump stops sealed; rear springs 412-429 lbs/in P/N 280390 only; previous parts no longer allowed. 2020-06-01 SRF3 SRF Shocks #28791wordingneutralSRF3 shock absorber brand restriction removed; all shocks must be sealed by Enterprises. 2020-05-01 SRF3 Update Bump Stop Rule #28712suspension & brakesneutralSRF3 bump stop now must be SCCA P/N 280407 only, no modifications, optional, max one per shock. 2020-05-01 SRF3 SRF Bump Stop Correction #27019wordingneutralSRF shock absorber bump stop clarified: only SCCA P/N 280407 allowed as delivered, maximum one per shock, effective 05/01/2020. 202-01-01 SRF3 SRF Rain / Brake Rule - BoD approved as follows #34958wordingneutralSRF rain and brake rule wording updated; supersedes GCR 9.3.32.B.2 effective 1/1/202 through 12/31/2024. 2019-12-01 SRF3 SRF Tire Warmer Rule #27622tyres & wheelsslowerSRF bans tire warmers and cooling methods other than natural air convection or conduction. 2019-12-01 SRF3 SRF / SRF3 Nose Weight Reduction #27706weightfasterSRF front nose weight minimum reduced from 35 to 32 lbs. 2019-12-01 SRF3 SRF / SRF3 Majors & Regional Class Updates #27723wordingneutralSRF3 reclassified as Spec Racer Ford 3 with 1.6L conversion; SRF2 becomes Regional Only Class.
	Runoffs 2019 ROFF192019-10-05				2:04.624Brian Schofield · fastest of 54 · top 5 within 0.6s	2:04.755Bobby Sak · fastest of 53 · top 5 within 0.3s	132.4Bobby Sak
3 earlier rule changes on record, in force before Runoffs 2019 (from 2019)3 wording · SRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102. · SRF3 nose assembly must use approved multi-piece design; no modifications allowed except as specified. · SRF3 brakes now allow Hawk Blue 9012 pads P/N 801993 only; shocks simplified to Penske P/N 280396 sealed assembly only, with optional SCCA Enterprises bump rubber P/N 280407 from 05/01/2020.showhide 2019-07-01 SRF3 SRF Dash Windscreen Kit #27028wordingneutralSRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102. 2019-05-31 SRF3 New SRF Sectional Nose Rule Addition #26914wordingneutralSRF3 nose assembly must use approved multi-piece design; no modifications allowed except as specified. 2019-05-01 SRF3 SRF Brakes and Shock Rule Changes #26629wordingneutralSRF3 brakes now allow Hawk Blue 9012 pads P/N 801993 only; shocks simplified to Penske P/N 280396 sealed assembly only, with optional SCCA Enterprises bump rubber P/N 280407 from 05/01/2020.

Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.