P2 + SRF + F5 at Michelin Raceway Road Atlanta

2021-05-01 P2 E&O tonneau cover provision in cockpit opening section

#30459 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2, GCR section 9.1.8.D.D.7.c, make changes as follows:
"Allowed equipment would include batteries, ballast, fire bottles, data recording devices, and cool suit
equipment, providing provided such equipment is securely attached to the car. Tonneau covers are allowed in order to meet
minimum dimensions."

2021-05-01 P2 Remove effective dates in Table 1

#30468 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, AMAC-AM5, Fox-2-Seater, Zephyrus, Decker 1/2 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, FIA Group CN non-composite chassis spec line, change as follows:
"Effective 01/01/2021"

2021-05-01 P2 E&O Maximum Valves Per Cylinder

#30560 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2 Engine Table, Spec Line B.1, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.2, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.3, add the maximum valves per cylinder as follows:
"4"

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)

2021-08-01 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 P2 F5 P2 Conversion

#30856 from Club Racing Board · Rule change · TB 21-08 (2021-08 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the notes as follows:
"Converted F5 cars must retain suspension compliant with F5 requirements and meet all P2 non-spec line requirements except
minimum width is 55 inches."

2021-08-01 P2 Clarify minimum body width requirement

#30859 from Formula/Sports Racing Committee · Rule change · TB 21-08 (2021-08 Fastrack)

In P2, GCR section 9.1.8.D.D.3, add the following:
"The minimum body width between the front and rear wheels as viewed from above shall not extend inwards beyond a vertical
plane connecting the centerlines of the front and rear tires."
Ralt RT40, Ralt RT41, Swift 008, and Swift 014

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

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 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)

2021-09-01 P2 P2 CN Engine Rebuild Clarification

#31000 from Jeff Shafer · Rule change · TB 21-09 (2021-09 Fastrack)

In P2 Engine Table, Spec Line E, change the notes as follows:
"Must use stock Honda OEM parts as listed in CN Honda K20A-FD2 Parts List found here:
https://www.scca.com/pages/technical-forms-anddownloads. No machining allowed. Balancing, porting, and polishing are
prohibited. Engine rebuilds that include valve jobs and/or cylinder honing must strictly adhere to published factory service
procedures."

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.

2021-12-01 P2 BoP adjustment effective 1-1-22

#31538 from Formula/Sports Racing Committee · Rule change · TB 21-12 (2021-12 Fastrack)

In P2 Engine Table, Spec Line B.1, change as follows:

2021-12-01 P2 E&O clarification of "Control Area" definition

#31539 from Formula/Sports Racing Committee · Rule change · TB 21-12 (2021-12 Fastrack)

In GCR section 9.1.8.D.E, change as follows:
"This "Control Area" is located within the plan view rectangular area defined by the rear edge of the front tires, and the front
edge of the rear tires, and the entire width of the body of the car’s lower surface facing the ground, which includes but is not
limited to the floor and any extensions of the floor or aerodynamic attachments to the floor, whether fastened to the bottom or
top side of the floor. Vertical structures such as "turning vanes" or "fins" that are attached to the car anywhere within the
"Control Area" to enhance aerodynamics are prohibited."

2022-01-01 F5 Data Box Mounting Plate

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

2022-01-01 P2 E&O letter #31539 – Control Area definition

#31783 from Formula/Sports Racing Committee · Rule change · TB 22-01 (2022-01 Fastrack)

In P2, GCR section 9.1.8.D.E, change as follows:
"This "Control Area" is located within the plan view rectangular area defined by the rear edge of the front tires, the front edge of
the rear tires, and the entire width of the car's lower surface facing the ground, which includes but is not limited to the floor and
any extensions of the floor or aerodynamic attachments to the floor, whether fastened to the bottom or top side of the
floor. Vertical structures such as "turning vanes" or "fins" that are attached to the car anywhere within the "Control Area" to
enhance aerodynamics are prohibited."

2022-02-01 P2 E&O Engine section

#31969 from Formula/Sports Racing Committee · Rule change · TB 22-02 (2022-02 Fastrack)

In P2, GCR section 9.1.8.D.L.c.1, change as follows:
"SCCA approved production based motorcycle engines with a maximum of 4 cylinders and with a maximum displacement
of 1500 1505cc."
In P2, GCR section 9.1.8.D.L.d, change as follows:
"Two Stroke Engine: 2 stroke engines with a maximum displacement of 1200 1205cc and a maximum of 4 cylinders."
In P2, GCR section 9.1.8.D.L.h.1, change as follows:
"Automotive engine based cars use a minimum weight of 1300 1350 lbs. unless otherwise stated in the tables."

2022-03-01 P2 Add spec line for Beasley B2

#32147 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)

In P2 Table 1, add a spec line as follows:
P2 Table 1 (Spec Line Cars)

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

2022-03-01 P2 E&O Table 1 spec line wing terminology

#32148 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element;"
In P2 Table 1, AMAC-AM5, Fox-2-Seater, Zephyrus, Decker 1/2 spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element;"
In P2 Table 1, Bobsy spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element only;"
In P2 Table 1, Jondal spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element only;"

2022-03-01 F5 E&O class name

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

2022-03-01 P2 E&O class name

#32196 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the marque as follows:
"AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F500 cars see notes"
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the notes as follows:
"Converted F500 cars must retain suspension compliant with F500 requirements and meet all P2 non-spec line requirements
except minimum width is 55 inches."

2022-04-01 P2 After Market to Aftermarket

#32373 from Club Racing Board · Rule change · TB 22-04 (2022-04 Fastrack)

In F500, GCR Section 9.1.1.D.15.D., change as follows:
"Stand-alone after market aftermarket ECUs are not permitted."
In P2, GCR Section 9.1.8.F.3.a., change as follows:
"As manufactured and ground by Oldsmobile or by an after after market aftermarket cam manufacturer to Oldsmobile factory
specifications for Vin.A (W41) or Mantapart #OP 1149."
In P2, GCR Section 9.1.8.F.3.b., change as follows:
"As manufactured and ground by Oldsmobile or by an after market aftermarket cam manufacturer to Oldsmobile factory profile
Vin. D or Mantapart #OP 1148."

2022-05-01 P2 E&O Clarification of Chassis Construction Requirements

#32469 from Club Racing Board · Rule change · TB 22-05 (2022-04 Fastrack)

In P2, GCR section 9.1.8.C.A.1, add the following:
"Chassis fully composed of composite structural materials or chassis partially composed of composite materials that is not
capable of rolling on its wheels without the composite materials being installed."
In P2, GCR section 9.1.8.C.C.1, add the following:
"Allow for any form of chassis construction except fully composite chassis. A chassis partially composed of composite materials
must satisfy the requirements of section 9.4.5.A, B, C, E, F and be capable of rolling on its wheels without the composite materials
being installed."

2022-05-01 P2 Clean up P2 wording

#32525 from Formula/Sports Racing Committee · Rule change · TB 22-05 (2022-04 Fastrack)

In P2, GCR section 9.1.8.C, change as follows:
"PROTOTYPE 2 (P2) CLASSIFICATION"
In GCR CONTENTS, change as follows:
"PROTOTYPE 2 (P2) CLASSIFICATION"

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)

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

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

2022-09-01 F5 Intake Boots Correction

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

2023-01-01 P2 Request to Classify Sebeco NP01

#33378 from Benjamin Cooper · Rule change · TB 23-01 (2023-01 Fastrack)

In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
Marque
Wheelbase inches
max/ Track Max
inches
Weight Displacement Engine Restrictor Notes

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

2023-01-01 P2 Radical spec line clarifications

#33485 from Jeff Barrow · Rule change · TB 23-01 (2023-01 Fastrack)

In P2 Table 1, Radical SR3/SR4 spec line, make the following change:
P2 Table 1 (Spec Line Cars)

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

2023-01-01 P2 E&O original class intent

#33519 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

In P2, GCR section 9.1.8.A.1, change as follows:
"Chassis fully composed of composite structural materials or chassis partially composed of composite materials that is not
capable of rolling on its wheels without the composite materials being installed."
In P2, GCR section 9.1.8.C.C.1, change as follows:
"Allow for any form of chassis construction except fully composite chassis incorporating composite structural materials. A chassis
partially composed of composite materials must satisfy the requirements of section 9.4.5.A, B, C, E, F, and be capable of rolling
on its wheels without the composite materials being installed. Both tube frame and aluminum or steel monocoque chassis
construction are allowed.”

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

2023-01-01 P2 Update Engine Table Spec Line B.1

#33608 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

In P2 Engine Table, Spec Line B.1, change as follows:

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.

2023-04-01 P2 Remove redundant effective date language and update engine table

#34012 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)

In P2 Engine Table, Spec Line B.1, change as follows:

2023-04-01 P2 E&O - Correct dimensional equivalents

#34038 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)

In P2, GCR section 9.1.8.C.D.2, change as follows:
"Height: No part of the vehicle having special or significant aerodynamic function shall exceed a height of 115cm (45.275 inches)
above the ground with the car in normal racing trim, driver aboard."
In P2, GCR section 9.1.8.C.D.3, change as follows:
"However, no portion shall extend more than 10cm (3.937 inches) beyond a plane tangent to the outer face of the front and rear
wheels with tires."
P2 Engine Table
Spec

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"

2023-05-01 P2 Clarify minimum side body height requirement

#34143 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)

In P2, GCR section 9.1.8.C.D.6, change as follows:
"As viewed from the side, T the outermost surface of side pods body between the front and rear wheel openings and above the
floor must have a minimum height equal to the height of the front axle centerline."

2023-05-01 P2 Clarify closed cockpit single seat car allowance

#34144 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)

In P2, GCR section 9.1.8.C.C, add a section as follows:
"4. Closed cockpit single seat cars are not permitted unless specifically allowed by a spec line in Table 1."

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."

2023-10-01 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."

2023-12-01 P2 Correct Table 1 for Engine Date Range Specifications

#35182 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-09 Fastrack)

In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)

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

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 P2 E&O - Clarify B.1 modified engine range in AMAC spec lines

#35225 from Club Racing Board · Rule change · TB 24-01 (2024-01 Fastrack)

In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)

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

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:

2024-01-01 P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines

#35340 from Michael A Reupert · Rule change · TB 24-01 (2024-01 Fastrack)

In P2 Engine Table, Spec Line B.1, add to notes as follows:
"No modifications allowed on engines manufactured after 2008 model year. 2007-2008 Suzuki GSX-R1000 crankcase part
#11300-21860 may be replaced with 2016-2019 Suzuki GSX-S1000 crankcase part #11301-04840."