F5 + F6 + SRF + FX at Buttonwillow Raceway Park

2020-03-01 FX Request to remove tire marking language from FM

#28415 from SCCA Staff · Rule change · TB 20-03 (2020-03 Fastrack)

In FX, Formula Mazda, add to the notes as follows:
"Marking tires is no longer required. Car must comply with all December 2019 GCR Formula Mazda
preparation rules found here: https://www.scca.com/downloads/48184-gcr-december-
2019/download."

2020-04-01 FX Request to classify FSV in FX

#28057 from Mark Green · Rule change · TB 20-04 (2020-04 Fastrack)

In FX, GCR section 9.1.1.J.B, add the following:
"5. Ex-Pro Formula Super Vee - Shall comply with notes in Table 1."
In FX Table 1, classify the Ex-Pro Formula Super Vee as follows:
Table 1
Car Engine
Wheel
Width (in)
± .060

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

2020-04-01 FX Classify FormulaSPEED in FX

#28715 from Formula/Sports Racing Committee · Rule change · TB 20-04 (2020-04 Fastrack)

In FX, GCR section 9.1.1.J.B, add the following:
"6. FormulaSPEED - Shall comply with notes in Table 1"
In FX Table 1, classify the FormulaSPEED as follows:
In FA Table 2, remove FormulaSpeed2.0 (FS2.0) spec line in its entirety.
Table 1
Car Engine
Wheel
Width (in)

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

2020-05-01 SRF 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

2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices

#28359 from Scott Thorp · Rule change · TB 20-07 (2020-08 Fastrack)

2020-07-01 F5 Two Stroke Motors (reply to #28359 WDYT)

#28816 from Jim Murphy · Rule change · TB 20-07 (2020-08 Fastrack)

Thank you for your letter. Please see the response to letter #28359 in this Fastrack.

2020-07-01 F5 Re letter requesting driver adjustable carb mixture

#28840 from Jay Novak · Rule change · TB 20-07 (2020-08 Fastrack)

2020-07-01 F5 #28359 WDYT Request for Cockpit Adjustment

#28875 from Richard Schmidt · Rule change · TB 20-07 (2020-08 Fastrack)

2020-07-01 FX Request to be added to FX group

#28991 from Christopher Bologna · Rule change · TB 20-07 (2020-08 Fastrack)

Thank you for your letter. The Club Racing Board will consider adding a spec line to FX Table 1 for
Formula Ireland/Formula FX cars once the relevant specifications have been received. The
Formula/Sports Racing Committee will forward a list of the specifications to be supplied by the letter
writer through the CRB letter log system.
Not Recommended

2020-09-01 FX Follow up to to Letter#28991 Request for FX classification

#29281 from Christopher Bologna · Rule change · TB 20-09 (2020-09 Fastrack)

In FX, GCR section 9.1.1.J.B, add the following:
"7. Formula Ireland / Formula FX - Shall comply with notes in Table 1"
In FX Table 1, classify the Formula Ireland / Formula FX as follows:

2020-10-01 F5 Request to Update Suzuki Engine Years for F500

#29453 from Wiley McMahan · Rule change · TB 20-10 (2020-10 Fastrack)

2020-12-01 FX Update specifications for FormulaSPEED cars

#29674 from Formula/Sports Racing Committee · Rule change · TB 20-12 (2020-12 Fastrack)

In FX Table 1, FormulaSPEED (FS2.0) line, change the notes as follows:
"Must use sealed ECU map and sealed engine, FS2.0 sealed Ohlins TTX dampers, spec three-piece FS2.0 wheels with FS2.0 logo,
and spec FS2.0 intake manifold. No part of the car may be altered from FS2.0 original parts, except for repairs that do not affect
performance. World Speed Inc. must provide complete specifications by 04/30/2020. Car must comply with specifications found
here: https://www.scca.com/pages/technical-forms-and-downloads."

2020-12-01 SRF 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:

2021-01-01 FX Request for Car Classification to Compete in Formula X

#29933 from Doris Siebert · Rule change · TB 21-01 (2021-01 Fastrack)

In FX, GCR section 9.1.1.J.B, add the following:
"8. 2010–2017 Formula Renault 2.0 – Shall comply with notes in Table 1."

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

2021-03-01 SRF 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."

2021-05-01 FX Classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000

#30460 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

TB: In FX, GCR section 9.1.1.J.B, add the following:
"9. 2000-2009 Formula Renault 2.0 / Fran-Am 2000 - Shall comply with notes in Table 1."
In FX Table 1, classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000 as follows:
butterfly shaft. All intake air shall pass through the required restrictors and
the throttle body or carburetor body. Intake manifold for either
carburetion or injection shall have individual runners connecting one
throttle plate to one rotor, only. No balance tubes or other device shall
connect runners between rotors.

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

2021-06-01 SRF 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"

2021-06-01 F5 Request to Allow Rotax 593 HO Engine

#30712 from Jack Walbran · Rule change · TB 21-06 (2021-06 Fastrack)

2021-06-01 FX FX/FRP Tire Rule

#30723 from SCCA Staff · Rule change · TB 21-06 (2021-06 Fastrack)

In FX Table 1, USF2000 Tube Frame spec line, change the notes as follows:
"Car must comply with FRP MAZDA MZR F2000 Technical Specifications (2018) except that any Hoosier radial tire measuring 20.5
x 7.0 x 13 (front) and 22.5.x 8.0 x 13 (rear) may be used."

2021-08-01 SRF 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 F5 Clarify allowable assisted shifting systems

#30871 from Formula/Sports Racing Committee · Rule change · TB 21-08 (2021-08 Fastrack)

2021-08-01 SRF 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 FX Rules Adjustment

#30950 from Robert Wright · Rule change · TB 21-08 (2021-08 Fastrack)

In FX Table 1, USF2000 Tube Frame spec line, change the notes as follows:
"Car must comply with FRP MAZDA MZR F2000 Technical Specifications (2018) found here,
https://www.scca.com/pages/technical-forms-and-downloads, with the following exceptions. except that a Any Hoosier radial
tire measuring 20.5 x 7.0 x 13 (front) and 22.5.x 8.0 x 13 (rear) may be used. Spec sealed Dynamics 1640 shock absorbers may be
replaced with any shock absorber that complies with the current FC rules. Spec PFC brakes may be replaced with Wilwood
Calipers No. 120-13863-N (right) and No. 120-13864-N (left) and Wilwood Pad No. 150-14781K. Spec Mazda spark plugs may be
replaced with Bosch spark plug Part No. F 000 KEO P45 7ZB."

2021-08-01 SRF 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

2021-08-01 F5 Request to correct terminology

#30976 from Jim Murphy · Rule change · TB 21-08 (2021-08 Fastrack)

2021-12-01 SRF Three Updates to SRF Rules

#31523 from Robey Clark · Rule change · TB 21-12 (2021-12 Fastrack)

In SRF, GCR section 9.1.8.E.1.X.f, change as follows:
"Wet:
Front – Hoosier P/N 46100 P185/60R13 H20
Rear – Hoosier P/N 46105 P205/60R13 H20
Ground clearance is 2.5" with driver as raced when H20 tires are used.
or
Front – Hoosier P/N 46100 P185/60 65R13 W2 (effective Oct. 4, 2021)
Rear – Hoosier P/N 46105 P205/60R13 W2 (effective Oct. 4, 2021)"

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

2022-01-01 F5 Data Box Mounting Plate

#31638 from Glen Thielke · Rule change · TB 22-01 (2022-01 Fastrack)

2022-02-01 FX FM Rule Set Clarification

#31881 from Moses Smith · Rule change · TB 22-02 (2022-02 Fastrack)

In FX, GCR section 9.1.1.J.B.1, change as follows:
"Formula Mazda – Shall comply with GCR 9.1.1.E (2019) notes in Table 1."
In FX Table 1, Formula Mazda spec line, change the notes as follows:
"Marking tires is no longer required. Car must comply with all December2019 GCR Formula Mazda preparation
rules specifications found here: https://www.scca.com/downloads/48184-gcr-december-2019/download FormulaMazda-FM-
Rules."
**Attach new document to site link.**

2022-02-01 FX E&O F4 Tires

#31940 from Formula/Sports Racing Committee · Rule change · TB 22-02 (2022-02 Fastrack)

In FX, GCR section 9.1.1.J.B.2, add the following:
"Formula 4 – Shall comply with FIA Formula 4 Technical Regulations (2015) and all subsequent safety requirements as issued by
the FIA and/or SCCA, except that tire choice is unrestricted."
In FX Table 1, FIA Certified F4 spec line, change the notes as follows:
"Upon request, competitors must provide a copy of the rules in effect when the car was certified by the FIA. Tire choice is
unrestricted."

2022-02-01 FX E&O USF2000 Tube Frame

#31951 from Formula/Sports Racing Committee · Rule change · TB 22-02 (2022-02 Fastrack)

In FX Table 1, USF2000 Tube Frame spec line, change the notes as follows:
"Any Hoosier radial tire measuring 20.5 x 7.0 x 13 (front) and 22.5. x 8.0 x 13 or 22.0 x 8.0 x 13 (rear) may be used."

2022-02-01 FX URGENT - FX- Formula Renault Tire

#32058 from Cody Towns · Rule change · TB 22-02 (2022-02 Fastrack)

In FX Table 1, Formula Renault 2.0 (10-17) spec line, add the following:
"The following exceptions apply: Tire choice is unrestricted. No part of the car may be altered from original Formula Renault 2.0
components, except for necessary repairs that do not affect performance."
In FX Table 1, Formula Renault 2.0 (00-09)/Fran-Am 2000 spec line, add the following:
"The following exceptions apply: Tire choice is unrestricted. No part of the car may be altered from original Formula Renault 2.0
components, except for necessary repairs that do not affect performance."

2022-03-01 F5 E&O class name

#32194 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)

2022-06-01 F5 593 carb boot availability and oil pump clarification

#32527 from CARL WASSERSLEBEN · Rule change · TB 22-06 (2022-06 Fastrack)

2022-06-01 SRF SRF Tire Rule Update

#32614 from Robey Clark · Rule change · TB 22-06 (2022-06 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Tires: must be run as delivered."

2022-06-01 SRF Brake, seal, and air filter clarifications

#32670 from Club Racing Board · Rule change · TB 22-06 (2022-06 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall be used as delivered with no
machining of any kind. Minimum thickness 13.25 12.20mm (0.522 0.481"). The 1985 Renault Alliance solid front rotor (Reference:
Bendix PRT1318 or Centrix 121.11004) may be used on front, rear, or both axles, but each axle must be paired to the same type
rotor. Rubber caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185."
In SRF, GCR section 9.1.8.D.2.H, change as follows:
"No performance M modifications of any kind.
SCCA Enterprises’ seals shall be intact.

2022-07-01 F5 Clarify stepped exhaust header references

#32743 from Club Racing Board · Rule change · TB 22-07 (2022-07 Fastrack)

2022-07-01 FX Formula Renault 2.0 (10-17) Intake Restrictor

#32745 from Formula/Sports Racing Committee · Rule change · TB 22-07 (2022-07 Fastrack)

In FX Table 1, Formula Renault 2.0 (10-17) spec line, change the notes as follows:
"The CRB may require a Flat Plate Intake Restrictor or reclassify the car at any time 45mm Flat Plate Intake Restrictor is
required. Fairings before or after the restrictor are prohibited."

2022-07-01 FX Allow Performance Electronics PE3-8400 for USF2000 MZR

#32767 from Formula/Sports Racing Committee · Rule change · TB 22-07 (2022-07 Fastrack)

In FX Table 1, USF2000 Tube Frame spec line, add to the notes as follows:
"ECU: Either the Pectel T2 ECU or the Performance Electronics PE3-8400 is required. Cars that use the Pectel T2 ECU must have an
accessible and operable communications port for a stereo jack; cars that use the PE3-8400 ECU must have an accessible and
operable communications port for an ethernet connection. The SCCA tune-file/map for the Pectel T2 and PE3-8400 on the official
SCCA website is required. The PE3-8400 tune-file/map must be loaded with PE3-8400 Monitor firmware V3.04.50. Competitors
may be required to cycle the master switch to kill the engine at the request of a steward on the grid before a qualifying session or
race."

2022-08-01 F5 Ensure availability of ECU for Rotax engines

#32695 from Carl Wassersleben · Rule change · TB 22-08 (2022-08 Fastrack)

2022-08-01 FX Pro Formula F2000/USF2000 Transmission E&O

#32823 from EJ Korecky · Rule change · TB 22-08 (2022-08 Fastrack)

In FX Table 1, Pro Formula F2000 Tube Frame spec line, change as follows:
"Up to 5 4 F forward G gears, L limited S slip D differential (sequential C carries a 25 lb. W weight P penalty)"

2022-08-01 FX Formula Mazda Minimum Weight

#33010 from Formula/Sports Racing Committee · Rule change · TB 22-08 (2022-08 Fastrack)

In FX Table 1, Formula Mazda spec line, add to the notes as follows:
"The following exception applies: Minimum weight is 1270 lb.”

2022-08-01 FX Formula Mazda Spec Line E&O Corrections

#33011 from Formula/Sports Racing Committee · Rule change · TB 22-08 (2022-08 Fastrack)

In FX Table 1, Formula Mazda spec line, change the engine as follows:
"Six (6) port Mazda 13B or four (4) port Mazda Renesis"
In FX Table 1, Formula Mazda spec line, change the weight as follows:
"1350 with six (6) port 13B, 1400 with four (4) port Renesis See notes"

2022-09-01 F5 Intake Boots Correction

#33028 from Formula/Sports Racing Committee · Rule change · TB 22-09 (2022-09 Fastrack)

2022-12-01 FX Reclassify 2010-2017 Formula Renault 2.0 as a spec line car in FA

#33395 from Formula/Sports Racing Committee · Rule change · TB 22-12 (2022-12 Fastrack)

2023-02-01 FX E&O - Remove references to FB and FM in GCR section 1.4.2.D

#33725 from Club Racing Board · Rule change · TB 23-02 (2023-02 Fastrack)

In GCR section 1.4.2.D, change as follows:
"It is preferable not to combine FA, FB, F C, FE, and or FM FX with FV and/or F600."

2023-03-01 SRF Update SRF Brake Rule

#33469 from Robey Clark · Rule change · TB 23-01 (2023-01 Fastrack)

In SRF, GCR section 9.1.8.D.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall be used as delivered with no
machining of any kind. Minimum thickness 12.20mm (0.481"). The 1985 Renault Alliance solid front rotor (Reference: Bendix
PRT1318 or Centrix 121.11004) may be used on front, rear, or both axles, but each axle must be paired to the same type
rotor. The Renault Alliance solid front rotors may not be used. Rubber caliper bushings may be replaced with bronze bushings P/N
1196185 or P/N 1196185. 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 may be used as delivered with no modification of any kind;

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

2023-05-01 SRF Update SRF Front W2 Rain Tire Part Number

#34118 from Robey Clark · Rule change · TB 23-05 (2023-05 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Front – Hoosier P/N 46100 1 P185/65R13 W2"

2023-06-01 SRF Hoosier SRF Wet Front Tire Rule Update

#34189 from Robey Clark · Rule change · TB 23-06 (2023-06 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:
Front – Hoosier P/N 46100 P185/60R13 H20 or W2
Rear – Hoosier P/N 46105 P205/60R13 H20 or W2
Ground clearance is 2.5" with driver as raced when P185/60R13 (H20 or W2) tires are used."

2023-06-01 FX USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC

#34329 from Formula/Sports Racing Committee · Rule change · TB 23-06 (2023-06 Fastrack)

2023-10-01 SRF SRF Radiator Rule Update

#34805 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)

In SRF, GCR section 9.1.8.D.1.V.j, change as follows:
"Radiator - Enterprises new style P/N 480465 (requires baffle P/N 480464) or P/N 480466 can be used. P/N 480466, may can be
replaced with Automotive P/N 1R698, CU698 or equivalent OEM manufacturer justified by one cross-reference chart equivalent,
as long as the size, shape, and material are the same as the original P/N. The capacity, core thickness, etc., cannot be changed
even if allowed under the above. The competitor is responsible for providing this documentation of the cross-reference P/N."

2023-11-01 FX FM Rules Update

#34841 from Moses Smith · Rule change · TB 23-11 (2023-11 Fastrack)

In FX Table 1, Formula Mazda spec line, replace the specifications referenced in the notes as follows:
***See attached***

2024-01-01 SRF Update SRF Rain / Brake Rule

#34706 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)

In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. rain / brake light comprised of a single standard trailer oval lamp, 2-1/4 inches x 6-1/2 inches, with
incandescent or LED illumination, P/N PT-STRB-R24, is required in the original roll hoop mounting location. This rule supersedes
GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No changes may be made to the original 3-pin connector on the
wiring harness. The secondary filament of the brake light assembly shall must be connected to a switch enabling its use as a rain
light."

2024-01-01 SRF Update SRF Brake Light Rule v1

#34853 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)

In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. P/N PT-STRB-R24 (SCCA Enterprises P/N 180427A) rain / brake light, P/N PT-STRB-R24, is required in the
original roll hoop mounting location. This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No
changes may be made to the original 3-pin connector on the wiring harness. An SCCA Enterprises P/N 1190503 Strobing Brake
Light Pigtail is required. The secondary filament of the brake light assembly must be connected to a switch enabling its use as
a strobing rain light. A Strobing Brake Light Kit P/N 1168003 is available, which includes the brake light and pigtail."

2024-01-01 SRF SRF / SRF3 Rule Updates

#35268 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)

In SRF, GCR section 9.1.8.D.1.H, add the following:
"NO MODIFICATIONS ALLOWED. Front brake ducts are required, attached to the openings in the lower radiator baffles, any
flexible 4" duct material allowed, installed length minimum 12" maximum 36" in length. Must be securely fastened, Bracket Part
# P/N 800368 can be used. Shall Must serve no other purpose. An extension may be welded to the side of the throttle pedal to
improve heel-and-toe braking. Master cylinder casting / location must be used as delivered on P/N 180110 Pedal Mounting
support. Aeroquip style -3 braided stainless flex lines only, must attach to all brake components without modification. Brake pad
"anti-rattle" clips must be removed."
In SRF, GCR section 9.1.8.D.1.V, add the following: