SRF3 at Indianapolis Motor Speedway

2019-05-01 SRF3 SRF Brakes and Shock Rule Changes

#26629 from Robey Clark · Rule change · TB 19-05 (2019-05 Fastrack)

In GCR section 9.1.8.E.1.X.g, make changes as follows:
“Brakes: Hawk Blue 9012 pads P/N 801993 or 801994 must be used. Wilwood V vented
rotor P/N 800065 minimum thickness 13.25mm (0.522 in.); shall be used as delivered with no
machining of any kind, P/N 800065. Minimum thickness 13.25mm (0.522”). Rubber caliper
bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185(or A or B).
Original caliper pistons may be replaced with vented caliper piston P/N 1196184; no other
modification allowed. Wilwood caliper with bracket universal fit P/N 800038 may be used as
delivered with no modification of any kind. Wilwood knock back spring (2.63 lbs.) P/N 800045

2019-05-31 SRF3 New SRF Sectional Nose Rule Addition

#26914 from Robey Clark · Rule change · TB 19-06 (2019-06 Fastrack)

In GCR section 9.1.8.E.1.E, add the following:
"NO MODIFICATIONS ALLOWED (except as specified). The SRF multi-piece nose assembly is approved for use."

2019-07-01 SRF3 SRF Dash Windscreen Kit

#27028 from Robey Clark · Rule change · TB 19-07 (2019-07 Fastrack)

In SRF, GCR section 9.1.8.E.1.V, add the following:
"ii. Dash Windscreen Kit, P/N 1180103 or P/N 180102, is allowed."

2019-12-01 SRF3 SRF Tire Warmer Rule

#27622 from Robey Clark · Rule change · TB 19-12 (2019-12 Fastrack)

In SRF, GCR section 9.1.8.E.1.V.s delete section in its entirety as follows and re-letter as follows:
"It is forbidden to regroove tires."
In SRF, GCR section 9.1.8.E.1.X.f, add new sections as follows:
"Tires:
Dry:
Front – Hoosier P/N 46340 P185/60ZR13
Rear – Hoosier P/N 46350 P205/60ZR13 SRF
Wet:

2019-12-01 SRF3 SRF / SRF3 Nose Weight Reduction

#27706 from Robey Clark · Rule change · TB 19-12 (2019-12 Fastrack)

In SRF, GCR section 9.1.8.E.1.E.a, change the minimum weight as follows:
"Front 35 32 lbs."

2019-12-01 SRF3 SRF / SRF3 Majors & Regional Class Updates

#27723 from Robey Clark · Rule change · TB 19-12 (2019-12 Fastrack)

In SRF, GCR section 9.1.8.E, make changes as follows:
"SPEC RACER FORD 3 (SRF/SRF3)"
In SRF, GCR section 9.1.8.E.1, make changes as follows:
"SPEC RACER FORD 2 (SRF) Regional Only Class"
In SRF, GCR section 9.1.8.E.2, make changes as follows:
"SPEC RACER FORD 3 (SRF3)"
In SRF, GCR section 9.1.8.E.2.A, make changes as follows:
"It is the intent of the SRF3, GEN3 a Ford 1.6L conversion, to update the current 1.9L SRF drivetrain for

202-01-01 SRF3 SRF Rain / Brake Rule - BoD approved as follows

#34958 from Board of Directors · Rule change · TB 23-10 (2023-10 Fastrack)

In SRF, GCR section 9.1.8.D.1.W.l, change as follows as approved by BoD on 9/12/2023:
"This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024."

2020-05-01 SRF3 SRF Bump Stop Correction

#27019 from Robey Clark · Rule change · TB 19-07 (2019-07 Fastrack)

In SRF, GCR section 9.1.8.E.1.X.h, make changes as follows:
"Shock Absorbers: Penske shock P/N 280396 with spec valving shall be used as a sealed
assembly with no modification of any kind. If shock seals are damaged in any way, the
shock must be sent to an authorized SCCA Enterprises service center for verification and
resealing at the competitor’s cost. Beginning
05/01/2020 2019, the SCCA Enterprises bump rubber stop P/N 280407 may be used as
delivered with no modification of any kind; if used, maximum of one bump rubber stop per
shock. Effective 05/01/2020, only the SCCA bump stop P/N 280407 may be used as

2020-05-01 SRF3 Update Bump Stop Rule

#28712 from Robey Clark · Rule change · TB 20-05 (2019-05 Fastrack)

In GCR section 9.1.8.E.1.I, change as follows:
"NO MODIFICATIONS ALLOWED. Bump stop shall remain on shock but may be slit vertically to ease
removal for shock adjustment. Effective May 1, 2020, only the SCCA Bump Stop P/N 280407 may be used,
with no modification of any kind. Bump stops are optional. If used, only one bump stop per shock is
permitted. The same brand of shock absorbers must be used in all shock absorber positions on the car."
In GCR section 9.1.8.E.1.X.h, change as follows:
"Shock Absorbers: Penske shock P/N 280396 with spec valving shall be used as a sealed assembly, with
no modification of any kind. If shock seals are damaged in any way, the shock must be sent to an

2020-06-01 SRF3 SRF Shocks

#28791 from Robey Clark · Rule change · TB 20-06 (2020-06 Fastrack)

In GCR section 9.1.8.E.1.I, change as follows:
"NO MODIFICATIONS ALLOWED. Effective May 1, 2020, only the SCCA Bump Stop P/N 280407 may be
used, with no modification of any kind. Bump stops are optional. If used, only one bump stop per shock
is permitted. The same brand of shock absorbers must be used in all shock absorber positions on the
car.
All shock absorbers must be sealed by Enterprises. Prior to sealing, the shock absorbers will be rebuilt by
Enterprises or its authorized rebuilders."

2020-12-01 SRF3 SRF Shocks, Springs and Ride Height.

#29688 from Robey Clark · Rule change · TB 20-12 (2020-12 Fastrack)

In SRF, GCR section 9.1.8.E.1.I, change as follows:
"NO MODIFICATIONS ALLOWED. Only SCCA Enterprises sealed Penske shocks P/N 280396 shall be used. Only front spring P/N
280387 or P/N RO28037 shall be used. Only rear spring P/N 280390 shall be used. Effective May 1, 2020, o Only the SCCA Bump
Stop P/N 280407 may be used, with no modification of any kind. Bump stops are optional. If used, only one bump stop per shock
is permitted."
"All shock absorbers must be sealed by SCCA Enterprises. Prior to sealing, the shock absorbers will shall be rebuilt
by SCCA Enterprises or its authorized rebuilders."
In SRF, GCR section 9.1.8.E.1.X, change as follows:

2021-03-01 SRF3 Mandatory identification:

#30223 from Robey Clark · Rule change · TB 21-03 (2021-03 Fastrack)

In SRF, GCR section 9.1.8.E.2.B, change as follows:
"Mandatory identification: "SRF3" near the side car numbers,. Approved (2) “Ford Performance” on each sideof the engine cover
plus a Ford Blue Oval on the center of the Nose & (2) “Performance Electronics” on eachside of the tail. "Hoosier" logo (4) on
both sides front lower outer corners of the nose, and each side of the tail."

2021-06-01 SRF3 SRF3 Alternator Pulley

#30684 from Robey Clark · Rule change · TB 21-06 (2021-06 Fastrack)

In SRF, GCR section 9.1.8.E.2.H.17, add the following:
"Alternator Pulley: P/N G902130 or P/N G902130A. 12oz minimum weight"

2021-08-01 SRF3 SRF Wet Tires

#30849 from Robey Clark · Rule change · TB 21-08 (2021-08 Fastrack)

In SRF, GCR section 9.1.8.E.1.X.f, make changes as follows:
"Dry:
Front – Hoosier P/N 46340 P185/60ZR13 SRF
Rear – Hoosier P/N 46350 P205/60ZR13 SRF
Wet:
Front – Hoosier P/N 46100 P185/60R13 H20
Rear – Hoosier P/N 46105 P205/60R13 H20
or

2021-08-01 SRF3 SADEV-SRF3 Transmission

#30926 from Robey Clark · Rule change · TB 21-08 (2021-08 Fastrack)

In SRF, GCR section 9.1.8.E.2.K, make changes to gear ratios as follows:
"Gear Ratios:
Ford/Mazda OEM 5-Speed:
1st 3.42 : 1
2nd 1.84 : 1
3rd 1.29 : 1
4th 0.97 : 1
5th 0.77 : 1

A specification table follows in the original; it is not shown here.

2021-08-01 SRF3 SRF Update Maintenance, Repairs and Seals

#30961 from Robey Clark · Rule change · TB 21-08 (2021-08 Fastrack)

In SRF, GCR section 9.1.8.E.1.C, make changes as follows:
"If any official Enterprises seal is broken, by an Enterprises Customer Service Rep. (CSR) emergency field repair, accident, or
intent, the procedures outlined under C.20., section S shall be followed. Parts with an Enterprises part number having the prefix
"10" are considered to be unrestricted, providing provided their dimensions are comparable."
In SRF, GCR section 9.1.8.E.1.S, make changes as follows:
"SCCA Enterprises' seals on engine are required for all races must be present on driveline components in designated locations for
all SCCA sanctioned events. Any competitor who runs participates in an event without all proper engine seals in the required
locations shall have his engine removed and shipped to Enterprises for testing and sealing after that event must remove his