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BoP Lab / Buttonwillow Raceway Park

FE + SRF + F5 + P1 at Buttonwillow Raceway Park

View sectors & track maps

No map published for Cal Club 2024, Cal Club 2023, Cal Club 2021.

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2022 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
AS+B-Spec+EP+vsF5×FA+FC+FE×FE2+FF+FP+FV+FX+GT1+GT2+GTX+HP+P+vsP1×P2+SM+SMX+vsSRF×SRF3+STL+STU+T1+T2+T3+T4+Show 11 inactive classes
Track configuration
Events all

This track has been raced on 3 configurations (19, 2.92 mi; 1.83 mi; 3.02 mi). Laps on different configurations are not comparable, so only events on the 2.92 mile layout are shown; switch above to see the others.

FE has no laps in the events chosen. It ran at Super Tour Apr 2019, Super Tour Apr 2018, Super Tour Apr 2017: add those events.

SRF has no laps in the events chosen. It ran at Super Tour Apr 2017, Majors Apr 2016: add those events.

F5 has no laps in the events chosen. It ran at Super Tour Apr 2017: add that event.

One lap is left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1Elan DP02Chip RomerP126, 621:06.404 D-Q21:06.4041:06.404 D-Q21:34.210 E-R11:35.424 C-R1+1.444 C-R1138.5 C-P35.076 C-Q227.630 C-Q230.427 C-Q2
2Dauntless-Stohr P07dJohn ManfroyP1081:08.162 D-Q21:08.1621:08.162 D-Q21:40.351 C-R11:41.119 C-R1+1.441 C-R1135.7 C-R137.462 C-Q229.002 C-Q232.052 C-Q2
3Elan DP02/MazdaJim DevenportP1231:08.300 D-Q21:08.3001:08.300 D-Q21:35.355 C-R11:35.659 C-R1+0.595 C-R1136.6 C-Q234.890 C-Q227.833 C-Q230.480 C-Q2
4Stohr WF1Aaron Bailey >115%P1151:33.548 E-Q21:33.5481:33.548 E-Q21:34.665 E-R11:35.329 E-R1+1.248 E-R1138.5 E-Q235.223 E-Q227.872 E-Q230.470 E-Q2
5Elan DP02Todd Slusher >115%P1821:34.228 E-Q21:33.4461:34.228 E-Q21:34.284 E-R1:36.708 E-R2+1.745 E-R2135.0 E-R34.821 E-Q228.133 E-Q230.492 E-Q2
6Elan DP02Matthew Romer >115%P1291:34.765 C-Q21:34.4641:34.765 C-Q21:35.534 C-R11:36.398 C-R1+1.674 C-R1136.4 C-R135.682 C-Q228.016 C-R130.766 C-Q2
7Dauntless StohrJohnnie Crean >115%P1361:36.753 E-Q21:36.3201:36.753 E-Q21:39.157 E-R11:39.679 E-R1+2.199 E-R1137.3 E-Q236.505 E-Q228.645 E-Q231.170 E-Q2
8Elan DP02Rod Rice >115%P1331:37.039 C-P1:36.6591:38.317 C-Q11:38.971 C-R11:39.728 C-R1+1.525 C-R1136.2 C-R136.218 C-P29.168 C-P31.273 C-P
9Norma M20fcJoseph Moran >115%P171:41.041 E-Q21:40.7521:41.041 E-Q21:44.292 E-R12:12.654 E-R1+7.426 E-R1131.8 E-Q237.854 E-Q230.531 E-Q232.367 E-Q2
10Elan DP02Chris Vian >115%P1491:41.659 C-P1:41.3631:42.096 C-Q21:43.024 C-R11:44.525 C-R1+3.433 C-R1127.1 C-R137.899 C-P30.734 C-P32.730 C-Q2

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

CarClassDriversLapQualRaceTrapS1S2S3
Elan DP02P161:06.404Chip Romer1:06.404Chip Romer1:34.210Chip Romer138.5Chip Romer34.821Todd Slusher27.630Chip Romer30.427Chip Romer
Dauntless StohrP121:08.162John Manfroy1:08.162John Manfroy1:39.157Johnnie Crean137.3Johnnie Crean36.505Johnnie Crean28.645Johnnie Crean31.170Johnnie Crean
Stohr WF1P111:33.548Aaron Bailey1:33.548Aaron Bailey1:34.665Aaron Bailey138.5Aaron Bailey35.223Aaron Bailey27.872Aaron Bailey30.470Aaron Bailey
Norma M20fcP111:41.041Joseph Moran1:41.041Joseph Moran1:44.292Joseph Moran131.8Joseph Moran37.854Joseph Moran30.531Joseph Moran32.367Joseph Moran

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Cal Club 2021 → Cal Club 2022 2021-02-19 to 2022-02-17

P1 DP02 Sealed 2ltr Engine Option

#30038 from Club Racing Board · Rule change · TB 21-01 (2021-01 Fastrack)

In P1 Engine Table, Elan DP02-spec Mazda MZR, change Notes as follows:
"Sealed engine option will be removed effective 1 3/1/2021.

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."

P1 E&O restrictor terminology

#30285 from Formula/Sports Racing Committee · Rule change · TB 21-03 (2021-03 Fastrack)

In P1 Engine Table, Spec Line C, change the notes as follows:
"May run without inlet intake restrictor at 1150 lbs. min. weight. Up to 1355cc may run without inlet intake restrictor at 1075 lbs.
min. weight."
In P1 Engine Table, Spec Line G, change the notes as follows:
"Up to 2000cc may run with inlet intake restrictor at 1400 lbs. min. weight. Up to 2300cc may run with inlet intake restrictor at
1445 lbs. min. weight."

P1 Clean up Spec Line A notes section

#30424 from Formula/Sports Racing Committee · Rule change · TB 21-04 (2021-04 Fastrack)

In P1 Engine Table, Spec Line A, change the notes as follows:
"Balance tubes not allowed. One Carb per cylinder. Carburetor induction only. One carburetor per cylinder. Restricted venturi
size. Balance tubes not allowed."

P1 Clean up Spec Line H notes section

#30425 from Formula/Sports Racing Committee · Rule change · TB 21-04 (2021-04 Fastrack)

In P1 Engine Table, Spec Line H, change the notes as follows:
"Peripheral P port or Bridge Port bridgeport A allowed."

P1 E&O tonneau cover provision in cockpit opening section

#30458 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P1, GCR section 9.1.8.C.C.6.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."

P1 Update Spec Line B Notes

#30498 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P1 Engine Table, Spec Line B, change the notes as follows:
"Staudacher cars homologated before 1-1-2014 using 1005cc may run 38.5mm flat plate intake restrictor at 950 lbs.
min. weight wt."

P1 Update Spec Lines C and G notes

#30499 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P1 Engine Table, Spec Line C, change the notes as follows:
"May run without intake restrictor FPIR not required at 1150 lbs. min. weight wt. Up to 1355cc max. may run without intake
restrictor FPIR at 1075 lbs. min. weight wt."
In P1 Engine table, Spec Line G, change the notes as follows:
"Up to 2000cc max. may run with intake restrictor 30mm SIR at 1400 lbs. min. weight wt. Up to 2300cc max. may run with intake
restrictor 30mm SIR at 1445 lbs. min. weight wt."

P1 E&O Maximum Valves Per Cylinder

#30559 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P1 Engine Table, Spec Line B, change the maximum valves per cylinder section as follows:
"NA 4"
In P1 Engine Table, Spec Line C, change the maximum valves per cylinder section as follows:
"NA 4"
In P1 Engine Table, Spec Line D, change the maximum valves per cylinder section as follows:
"NA 4"

FE FE Radiator Screens

#30575 from Robey Clark · Rule change · TB 21-06 (2021-06 Fastrack)

added · aeroFE radiator screens now allowed, maximum ¼ inch from sidepod front vertical plane.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.F.e, add language as follows:
"Radiator screens are allowed and recommended. Screens may be placed no more than ¼ inch from the vertical plane of the
front of the sidepods."

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"

F5 Request to Allow Rotax 593 HO Engine

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

addedF500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required.
As printed in Fastrack

In F500, GCR section 9.1.1.D.14, Snowmobile Derived Engines, add the following:
"Rotax 593 in a carbureted, non-HO or HO version;"
In F500, GCR section 9.1.1.D.14.A, add the following:
"38mm intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 (last 6 digits 867862 are
embossed on the boot), or Kimpex 07-100-33, shall be used for the 493 and 593 non-HO engines. 38mm intake boots, BPP
420867882 (last 6 digits 867882 are embossed on the boot) shall be used for the 2003 593 HO engine, and BPP 420867879 (last 6
digits 867879 are embossed on the boot) shall be used for the 2004-2007 593 HO engines."
In F500, GCR section 9.1.1.D.14.I.3, add the following:
"Rotax 593 non-HO (0.010" overbore): Rotax P/N 420889171"
In F500, GCR section 9.1.1.D.14.J.3, add the following:
"Rotax 593 non-HO engine only: Rotax OEM 0.010" overbore piston (P/N 420889171)."
In F500, GCR section 9.1.1.D.14.K, add the following:
"Rotax 593 non-HO engine only:"
In F500 Engine Table, add the following:
F500 Version/Model Weight
(lbs) Inlet Restrictor Outlet Restriction Notes
Rotax
593*
Carbureted HO
version (03-07) 875 MA0242SP1020A
or
MA0242SP1063A
Y-pipe exhaust
manifold and single
expansion chamber (ref
9.1.1.D.14.B)
Note 1 and 4. Restrictor size and
type is to be displayed by the
following designation: 593 RSTR

FE FE Tire Rule Changes

#30754 from Robey Clark · Rule change · TB 21-07 (2021-07 Fastrack)

wordingFE removes qualifying tire marking requirements and rain tire set rules; renumbers tire warmer prohibition.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.M, make changes as follows:
"WET
Hoosier
Front: P/N: 44195 W3, 22.0 X 7.5-13 (compliant through 12/31/2022)
or P/N: 44196 W3, 22.0 X 8.0-13
Rear: P/N: 44217 W3, 22.0 X 9.0-13
a. A competitor shall start the race on at least 3 tires used in a qualifying session for the race as identified by markings made on
the tires by a race official. It is the responsibility of the competitor to ensure that his or her tires are appropriately marked prior
to (e.g. on the false grid), during, or immediately after (e.g. as the car leaves the track) a qualifying session.
b. For races with more than one qualifying session, a competitor shall start the race on any 3 or 4 marked tires from any
qualifying session for the race.
c. If a competitor chooses to start the race on any more than one tires that was not used in a qualifying session for the race and
not appropriately marked, the competitor shall forfeit his or her grid position and start from the back of the grid. This forfeiture
of grid position shall not apply if all qualifying sessions for the race were run under rain or wet conditions.
Table 2 (Spec Line Cars)
Car Engine
Wheel
Width (in)
± .060
Aero Transmission Weight Notes
Ralt RT40, Ralt
RT41, Swift 008, and
Swift 014 chassis

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

FE Radiator Screens Clarification

#30792 from Robey Clark · Rule change · TB 21-07 (2021-07 Fastrack)

wordingFE radiator screens may not protrude more than ¼ inch in front of the outside vertical plane of the sidepods.
As printed in Fastrack

RM 21-04. In FE, GCR section 9.1.1.I.2.F.e, change as follows:
"Radiator screens are allowed and recommended. Screens may be placed no not protrude more than ¼ inch from in front
of the outside vertical plane of the front of the sidepods."

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

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Front – Hoosier P/N 46100 P185/60R13 W2 (effective Oct. 4, 2021)
Rear – Hoosier P/N 46105 P205/60R13 W2 (effective Oct. 4, 2021)"

F5 Clarify allowable assisted shifting systems

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

wordingF5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control.
As printed in Fastrack

In F5, GCR section 9.1.1.D.6.B.4, make changes as follows:
"All gear changes must be initiated and made completed by the driver. Only mechanical gear shifting mechanisms are permitted.
This may include cables, rods, or other mechanical linkage systems. All other shifting mechanisms are not permitted. This
prohibition shall include electric solenoid shifters, air-shifters, etc. and other devices not mechanically actuated and controlled
completely by the driver. Devices that allow pre-selected gear changes and closed-loop systems that use feedback from sensors
to vary the timing of the gear selection process are also prohibited.
Devices that interact with the throttle, ignition, or fuel system during a shift operation (for example: ignitions cuts, flat shifters,
blippers) are permitted, but no such devices shall remove the driver's control of the gear change initiation, gear selection or
completion. The burden of proving that a device is in compliance with this rule shall be upon the competitor."

P1 Add 1355cc spec line

#30890 from Formula/Sports Racing Committee · Rule change · TB 21-08 (2021-08 Fastrack)

In P1 engine table, change as follows:
P1 Engine Table
Spec
Line Engine Series

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

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

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Final Drive Ratio: 3.85
OR
SADEV-SRF3 6-Speed Sequential (beginning Oct. 4, 2021):

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

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

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unsealed component and it must be inspected by a Customer Service Rep. (CSR) or Enterprises. Notation shall be made in the
vehicle logbook and seals checked prior to the next event. The competitor will be responsible for all cost incurred by this
procedure. regardless of the findings, and If the component is found to be out of specification, the competitor is subject to
penalty by the SOM if engine is found to be not as specified."
"SCCA Enterprises' seals are required on all SPEC RACER FORD engines and transmissions."

F5 Request to correct terminology

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

wordingF5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition.
As printed in Fastrack

In F5, GCR section 9.1.1.D.1, change as follows:
"A class for single seat, open wheel, rigid limited suspension race cars using either a snowmobile-derived engine and drive
components or a 600cc motorcycle engine."

P1 Move 2000cc and 2300cc engine options to individual spec lines

#31012 from Formula/Sports Racing Committee · Rule change · TB 21-09 (2021-09 Fastrack)

In P1 Engine Table, change as follows:

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

P1 E&O Spec Line B notes

#31095 from Formula/Sports Racing Committee · Rule change · TB 21-09 (2021-09 Fastrack)

In P1 Engine Table, Spec Line B, change the notes as follows:
"Staudacher cars may run 950 lbs. min. wt. with 38.5mm flat plate intake restrictor at 950 lbs. min. wt."

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)"

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In SRF, GCR section 9.1.8.E.2.H.24, change as follows:
"Air Box: P/N G592230 Mandatory unmodified As delivered, except as noted under body work, Air Box floor vent must remain
open and un-obstructed."
In SRF, GCR section 9.1.8.E.2.H, add a new section as follows:
"25. SRF3 Restrictor plate: P/N G301048 As delivered, installed between throttle body and intake manifold. Mandatory Jan. 1,

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

FE Two FE2 Rule Updates

#31524 from Robey Clark · Rule change · TB 21-12 (2021-12 Fastrack)

In FE, GCR section 9.1.1.I.2.F.j, add language as follows:
"Enterprise’s windscreen Only P/N: WM137000 is allowed as delivered."
In FE, GCR section 9.1.1.I.2.P.c, change as follows:
"Racer’s tape may be used to repair crash damage, or as a precautionary means of securing the body panels or retaining latches.
Crash-damage is defined as having occurred during the current event, and the tape should be of an appropriate color if possible.
Taping of body joints seams is not allowed."

P1 Displacement & Weight Change Request for 2-Cycle 6 Cylinder

#31609 from Jason Miller · Rule change · TB 22-01 (2022-01 Fastrack)

In P1 Engine Table, Spec Line A, change as follows:
P1 Engine Table
Spec
Line Engine Series Max. Displ

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

F5 Data Box Mounting Plate

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

addedF5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs.
As printed in Fastrack

In F5, GCR section 9.1.1.D, add a new section as follows:
"19. All F5 cars competing in Majors Races and the Runoffs must have the AIM part #X47KPFSOLO2R0 data box mount installed
on the vehicle to provide the necessary mounting of the AIM Solo or Solo 2 data box. The mounting surface is to be approximately
oriented either horizontally or vertically either parallel or perpendicular to the longitudinal axis of the car and must be accessible
from the exterior of the car with the driver on board -- it should have a view of the sky and not be located under carbon fiber or
metallic bodywork. Sufficient space should be left between the mounting plate and the surface to which it is attached to permit
the use of zip ties/tie straps to restrain the data box to the mounting plate. The purpose of this requirement is to allow the
random placement of data boxes on cars on pre-grid by SCCA assigned personal and the collection of the box when the car exits
the race track. Contact AIM and their distributors for direct purchase."

Cal Club 2022 → Cal Club 2023 2022-02-17 to 2023-02-24

F5 E&O class name

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

addedF500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2.
As printed in Fastrack

In F500, GCR section 9.1.1.D.19, change as follows:
"All F500 cars competing in Majors Races and the Runoffs must have the AIM part #X47KPFSOLO2R0 data box mount installed
on the vehicle to provide the necessary mounting of the AIM Solo or Solo 2 data box."

P1 E&O Clarification of Bodywork Rules

#32468 from Club Racing Board · Rule change · TB 22-05 (2022-04 Fastrack)

In P1, GCR section 9.1.8.B.C.2, add the following:
"Cycle-type fenders (which that cover only the tire and are not continuous with the rest of the body) and may thereby permit a
view of the ground from above are prohibited."
In P1, GCR section 9.1.8.B.C.3, add the following:
"As viewed from the side, T the outermost surface of 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."
In P1, GCR section 9.1.8.B.D.1, add the following:
"It is not permitted to duct air through any part of the bodywork for the purpose of providing aerodynamic downforce on the

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car. This prohibition includes openings above the front spoiler or splitter that allow air to pass through the front bodywork for the
purpose of providing aerodynamic downforce."

F5 593 carb boot availability and oil pump clarification

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

wordingF500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted.
As printed in Fastrack

In F500, GCR section 9.1.1.D.14.A, change as follows:
"Carburetor mounting shall must be of individual runners, with no balance pipes, and no plenums unless fitted as standard as on
the Rotax 493 and 593 engines. The use of the intake plenum/resonator on the 493 and the 593 engines is optional. If the intake
resonator is removed the resulting holes MUST be completely plugged and the plugs must be held in place by appropriate
clamps. Plugs may be of any material and must serve no other purpose than to plug the holes originally intended for the
resonator. 38mm intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 (last 6 digits
867862 are embossed on the boot), or Kimpex 07-100-33, or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-
2 shall must be used for the 493 and 593 non-HO engines. 38mm intake boots, BPP 420867882 (last 6 digits 867882 are
embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 shall must be used for the 2003 593 HO
engine, and 38mm intake boots, BPP 420867879 (last 6 digits 867879 are embossed on the boot) or Moto Tassinari V-Force 3
Reed Valve System V3124-873B-2 shall must be used for the 2004-2007 593 HO engines. Supercharging, turbocharging, and
direct fuel injection are prohibited."
In F500, GCR section 9.1.1.D.14, add a new section as follows:
"M. The stock oil injection pump, oil lines, and control cables may be removed from all Rotax engines. The oil injection ports may
be removed and plugged as necessary."

FE Update FE/FE2 Tire Rule

#32613 from Robey Clark · Rule change · TB 22-06 (2022-06 Fastrack)

wordingFE tires must be run as delivered in sets of 4.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.M, change as follows:
"Tires must be run as delivered in sets of 4 as stated below:"

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."

FE Master cylinder clarification

#32669 from Club Racing Board · Rule change · TB 22-06 (2022-06 Fastrack)

wordingFE master cylinders clarified: Girling front .700" piston WM802005, rear .750" piston WM802006.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.K.c, change as follows:
"Master cylinders must be the Girling type:
Girling F front master cylinder is .700" piston diameter, Part # WM802005
Girling R rear master cylinder is .750" piston diameter, Part # WM802006"

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.

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(2) on cam cover, (2) on the oil pan, (1) on the each cam shaft. Automatic Drivetrain Violation if removed."
In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 or K&N RC-9160"

F5 Clarify stepped exhaust header references

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

wordingF500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area.
As printed in Fastrack

In F500, GCR section 9.1.1.D.15.G, add the following:
"The exhaust system and exhaust manifold are unrestricted, within SCCA safety regulations, except that
stepped diameter exhaust headers are not allowed. This prohibition does not include the exhaust flange area immediately
adjacent to the cylinder head."
In F500 Engine Table, Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 spec lines, add the following:
"Stepped diameter exhaust headers are not allowed"

F5 Ensure availability of ECU for Rotax engines

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

added · engineF500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU.
As printed in Fastrack

In F500, GCR section 9.1.1.D.14, add a new section as follows:
"N. Alternate ECU for Rotax engines: The use of the Ingi Tech Sparker ignition part number DCP-CDI-P2 is permitted."

P1 Clarify authorization to use flat plate intake restrictor

#32964 from Club Racing Board · Rule change · TB 22-08 (2022-08 Fastrack)

In P1, GCR section 9.1.8.B.J.7, add the following:
"On 4-cycle motorcycle-based engines equipped with individual throttle bodies, individual flat plate intake restrictors must be
installed within 4 inches of the primary butterfly throttle shaft or centerline on the intake side of the individual throttle body's
primary butterfly."

FE Engine Heat Shield & Insulation

#33019 from Robey Clark · Rule change · TB 22-09 (2022-09 Fastrack)

addedFE engine heat shield and insulation between block and exhaust now permitted to protect fuel cell, filter, rail, lines.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.G.a.17, change as follows:
"A heat shield and heat insulation material may be used between the engine block and the exhaust system and is recommended
for the purpose of protecting hoses, shifter cable, and wiring from the heat of the engine and exhaust. Heat insulation material
may also be used to protect the fuel cell, fuel filter, fuel rail, and fuel lines."

F5 Intake Boots Correction

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

wordingF500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO.
As printed in Fastrack

In F500, GCR section 9.1.1.D.14.A, change as follows:
“Carburetor mounting must be of individual runners, with no balance pipes and no plenums unless fitted as standard as on the
Rotax 493 and 593 engines. The use of the intake plenum/resonator on the 493 and 593 engines is optional. If the intake
resonator is removed the resulting holes MUST be completely plugged and the plugs must be held in place by appropriate
clamps. Plugs may be of any material and must serve no other purpose than to plug the holes originally intended for the
resonator. 38mm i Intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 1 (last 6 digits
867862 1 are embossed on the boot), or Kimpex 07-100-33, or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 must
be used for the 493 and 593 non-HO engines. Moto Tassinari V-Force V3120-794A-2 Reed Valve System may be used with any
allowed intake boot on the 493 and 593 non-HO engines. 38mm i Intake boots, BPP 420867882 (last 6 digits 867882 are
embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 must be used for the 2003 593 HO engine,
and 38mm i ntake boots, BPP 420867879 (last 6 digits 867879 are embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve
System V3124-873B-2 must be used for the 2004-2007 593 HO engines. Supercharging, turbocharging, and direct fuel injection
are prohibited.”

FE Brake bias adjuster clarification

#33084 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)

added · suspension & brakesFE drivers may now adjust brake bias manually during the race.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.K, add the following:
"f. Driver adjustable manual brake bias is allowed."

FE FE Front and Rear Wing Update & Clarification

#33089 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)

wordingFE front and rear wing specifications clarified: adjustment ranges, shimming, Gurney flap sizes, mounting hardware, and measurement references refined.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.F.g, change as follows:
"The front wing main plane, front wing secondary elements, front wing support mounts, and front wing endplates assembly and
its related mounting components must be used and mounted as delivered from Enterprises. Any m Modifications to these parts,
except as specifically noted herein, is strictly forbidden are prohibited. The front main wing plane angle is zeroed on the rear
upper aft transmission surface measured with a suitable angle gauge, i.e.: digital level on the top main plane 2 inches outward
from the nose box mounts element may be adjusted +2.5 to -0.5 degrees. It must meet a minimum measurement of negative .5
degrees (angled down in the back) and a maximum measurement of positive 2.5 degrees (angled up in the back). It is acceptable
to shim the main plane to obtain this measurement. Shimming 2 of the 4 verticals through the main element mounting points to
achieve adjustment range is allowed. The main element angle is measured relative to the reference plane. The main element is
checked on the upper surface, midway between the vertical mounting and outer secondary elements on both sides. Note: The
reference plane is the machined surface where the shock clevises are attached to the transmission case. Secondary wing
elements may be used in any of the provided adjustment holes. Gurney flaps (0.500" +/- 0.030") are permitted allowed as an
option for installation on the trailing edge upper surface of the front wing on secondary elements only, not the wing main
plane. They Gurney flaps must be securely attached in a secure fashion, without modification to the wing element except for
mounting hardware. Only .500” +/- .030” flaps are allowed. Maximum number of mounting locations on front flaps is 2 on each
flap and maximum hardware size is with two #8 (.156) hardware or tape. Gurney flaps, where attached, shall be are bent or
formed 90 degrees to have a sharp inner radiusand parallel to the upper surface of the wing element and. no t Tapered or "saw-
toothed" Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the
element."
In FE, GCR section 9.1.1.I.2.F.h, change as follows:
"The rear wing assembly and its related mounting components are to must be used and mounted as delivered. Any
m Modifications, except as specifically notedherei n, are strictly prohibited. The lower plane angle, zeroed on the rear upper aft
transmission surface, measured with a suitable angle gauge. i.e.; digital level on the top surface of the lower rear wing must
meet a minimum of –3.0 degrees (angled down in the back) and a maximum of +2.0 degrees (angled up in the back). It is
acceptable to adjust the lower rear element to meet these requirements element may be adjusted +2.0 to -3.0
degrees. Chamfering the upper inner corners of the wing mounting brackets to achieve the adjustment range is allowed. The
element angle is measured relative to the reference plane. The element is checked on the top surface, near the center, without a
Gurney flap. Note: The reference plane is the machined surface where the shock clevises are attached to the transmission
case. The upper rear wing element may only be adjusted within the parameter profile of the wing endplates and wing adjusters
as provided from Enterprises using any of the provided adjustment holes. No additional holes may be added. Gurney
flaps (0.250" +/- 0.030") are permitted allowed as an optionfor installation on the trailing edge upper surface of the on one or
both wing elements. They Gurney flaps must be securely attached in a secure fashion, without modification to the wing element
except for mounting hardware. Only .250” +/- .030” flaps are allowed on one or both elements with five #8 hardware or
tape.The Gurney flaps only, may extend beyond the parameters of the end plate are bent or formed 90 degrees to have a sharp
inner radius. Maximum number of mounting locations is 5 and maximum hardware size is #8 (.156). Gurney flaps, where degrees
and parallel to the upper surface of the wing element and no t Tapered or "saw-toothed"
Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the element."

P1 E&O clarification regarding forced induction

#33123 from Club Racing Board · Rule change · TB 22-10 (2022-10 Fastrack)

In P1, GCR section 9.1.8.B.J, add a new part and renumber the section accordingly:
"1. Turbocharging and supercharging are not allowed."

P1 Clarify body panel coverage of suspension components

#33318 from Club Racing Board · Rule change · TB 22-11 (2022-11 Fastrack)

In P1, GCR section 9.1.8.B.D.1, add the following:
"No aerodynamic devices (e.g. "skirts," body sides) may extend more than 1cm (0.394 inches) below a lower surface anywhere
on the car to the rear of the front axle. Seat bucket or other protrusions shall not circumvent this rule. Aerodynamic devices shall
be securely mounted on the entirely sprung part of the car and not be movable when the car is in motion. It is not permitted to
duct air through any part of the bodywork for the purpose of providing aerodynamic downforce on the car. This prohibition
includes openings above the front spoiler or splitter that allow air to pass through the front bodywork for the purpose of
providing aerodynamic downforce. Body panels intended to cover suspension components as viewed from the side and above
must not be shaped as an airfoil cross-section or create a pressure differential from the action of air flowing over the upper and

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lower surfaces of the panel."

Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23

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;

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maximum of one spring per caliper."
P2 Engine Table
Spec
Line Engine Series

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

P1 November 2022 Rules Clarification for Suspension Covers

#33615 from Michael Devins · Rule change · TB 23-01 (2023-01 Fastrack)

In P1, GCR section 9.1.8.B.D.1, effective 3/1/23, change as follows:
"Body panels intended to cover suspension components as viewed from the side and above must not be shaped as an airfoil
cross-section or create a pressure differential from the action of air flowing over the upper and lower surfaces of the
panel. Upper and lower panel surfaces must be symmetrical (mirror images) across a straight line connecting the center of the
leading edge with the center of the trailing edge. Leading and trailing edges may be rounded. Panel angle front to rear and side
to side is unrestricted, but it is not permitted to angle the body panels for the purpose of providing aerodynamic downforce on
the car."

FE Update FE SADEV Transmission Rule

#33883 from Robey Clark · Rule change · TB 23-04 (2023-04 Fastrack)

wordingFE SADEV transmission rule removes note that all ratios under review and could be updated prior to sealing.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.G.b.4.b, change as follows:
"(All SADEV ratios are under review and could be updated prior to sealing date)"

P1 E&O - Correct dimensional equivalents

#34018 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)

In P1, GCR section 9.1.8.B.C.3, 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 car in normal racing trim, driver aboard."
In P1, GCR section 9.1.8.B.C.4, 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."
In P1, GCR section 9.1.8.B.C.6.b, change as follows:
"Cockpit length: 60cm (23.662 622 inches). Cockpit width for each seat: 45cm (17.717 inches) maintained over 30cm (11.811

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inches)."

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"

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."

P1 SIR Testing

#34354 from Jeff Shafer · Rule change · TB 23-06 (2023-05 Fastrack)

In P1, GCR section 9.1.8.B.J, add a new section and re-letter the following sections accordingly:
"3. The SIR testing procedure in Appendix F. Technical Glossary (Restrictor, Intake) is modified as follows: If the vehicle stalls
within 3 seconds, the vehicle is deemed compliant with the stall test."

P1 E&O Single Inlet Restrictor abbreviation, etc.

#34369 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)

In P1, GCR section 9.1.8.B.J.2, change as follows:
"Where a carburetor or fuel injection restriction is specified, a flat plate intake restrictor, restricted venturi, or Single Inlet
Restrictor (SIR) is required through which, all intake air for each cylinder or the entire fuel-air mixture, if prepared before this
point, shall must pass through the restrictor."

P1 E&O Clean up ducted air provision

#34410 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)

In P1, GCR section 9.1.8.B.D.2, change as follows:
"All ducted air that exits through the top of the bodywork behind the rear of the front tires must pass through a heat
exchanger., excluding This requirement does not apply to the cockpit opening, fender louvers, or slots, louvers, grills, and similar
devices for allowing intended to allow heat to escape the engine bay, shall pass through a heat exchanger."

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."

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."

FE Update FE Rain Light Rule

#34707 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)

wordingFE rain light now must meet FIA Standard 8874-2019, Technical List No. 76, effective 1/1/2024.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.N.f, change as follows:
"Any rain light is allowed. Effective 1/1/2024, a rain light that meets FIA Standard 8874-2019, Technical List No. 76, is required as
specified in GCR section 9.3.32.B.2."

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."

P1 Please correct omitted punctuation

#34890 from Club Racing Board · Rule change · TB 23-10 (2023-09 Fastrack)

In Cars and Equipment, GCR section 9.3.33.B.2, add the following:
"(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open
wheel) and Sports Racing cars."
In Appendix F. Technical Glossary, Minimum Weight, change as follows:
"Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or
qualifying session."
In FA Table 1, Spec Line E notes, add the following:
"Any BD series iron or alloy cylinder block and alternate crankshaft permitted."

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In FC, GCR section 9.1.1.B.11.c, change as follows:
"The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below.""
In F600, GCR section 9.1.1.D.14, add the following:
"Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter;
an electric starter may be added."
In P1, GCR section 9.1.8.B.J.2, add the following:
"Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder
or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."

P1 Adjust restrictors and weights for Engine Table lines H and I

#35229 from Club Racing Board · Rule change · TB 24-01 (2024-01 Fastrack)

In P1 Engine Table, change as follows:
P1 Engine Table
Spec
Line Engine Series Max. Displ.
(cc)
Max
Valves /
Cyl.

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Req’d Restrictor Min. Weight (lbs) Notes
H 4 cycle 2000 4 30 32mm SIR 1400 1450
I 4 cycle 2300 4 30 31mm SIR 1445 1475

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:

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"ii. Rear SADEV shift cable aluminum two-piece style clamp may be used. The P/N WM302007A clamp must serve no other
purpose."
In SRF, GCR section 9.1.8.D.1.X.k, add the following:
"Negative camber shall must not exceed 5.0 degrees absolute maximum front and rear."
In SRF, GCR section 9.1.8.D.1.AA.b, add the following:
"2. Height of the radiator opening vertical surface 3 1/2“ +/- 1/2"."
P2 Engine Table B.1
2008 and older Stock
Suzuki, Yamaha,
Honda, BMW
38.5mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 38.5mm
Modified
Engine
950 lbs.
1005cc max
P2 Engine Table B.1
2008 and older 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.

FE FE/FE2 rule update

#35269 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)

wordingFE allows racer's tape for crash repair, panel security, and heat exchanger opening control; seam taping banned.
As printed in Fastrack

In FE, GCR section 9.1.1.I.2.P.c, add the following:
"Racer's tape may be used to repair crash damage, or as a precautionary means of securing the body panels or
retaining latches fasteners only. Crash-damage is defined as having occurred during the current event, and the tape should be of
an appropriate color if possible. Taping of body seams is not allowed. Taping across heat exchanger openings as a way to control
temperature is allowed and may serve no other purpose."

P1 Revise Group CN Honda K20A-FD2 Spec Line

#35337 from Formula/Sports Racing Committee · Rule change · TB 24-01 (2024-01 Fastrack)

In P1 Engine Table, Spec Line G, change as follows:
P1 Engine Table
Spec
Line Engine Series Max. Displ.
(cc)
Max
Valves /
Cyl.

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Req’d Restrictor Min. Weight (lbs) Notes
G Group CN-spec
Honda K20A-FD2 2000 4
Stock Honda intake
manifold with
unmodified 64mm
single throttle body
1400
No engine modifications except dry sump oil
system, ECU map, and exhaust. Must use stock
Honda OEM parts as listed in CN Honda K20A-
FD2 Parts List found here:
https:/www.scca.com/pages/technical-forms-and-
downloads. No machining allowed. The CRB
reserves the right to add an appropriately sized flat
plate intake restrictor at any time if warranted by
the data.

What the rules allowed changed as listed; this does not say what any particular car ran.