FE + F6 + FX at Buttonwillow Raceway Park

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."

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
Aero Transmission Weight Notes

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

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)
± .060
Aero Transmission Weight Notes

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

In GCR section 9.1.1.I.2.H.b, change as follows:
"Effective June November 1, 2020, Part # WM203013 Front and Part # WM203014 Rear will be required
for FE2 and optional for FE."

In FE, GCR section 9.1.1.I.2.F., clarify wording as follows:
"g. Wicker bill ( Gurney flaps) are permitted as an option for installation on the trailing edge upper
surface of the front wing secondary elements only, not the wing main plane.
h. Wicker bill ( Gurney flaps) are permitted as an option for installation on the trailing edge upper surface
of the wing element."

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

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:

In GCR section 9.1.1.I.2.F.g, clarify as follows:
"Gurney flaps are permitted as an option for installation on the trailing edge upper surface of the front wing secondary elements
only, not the wing main plane. They must be attached in a secure fashion, without modification to the wing element except for
mounting hardware. Total height is Only .500" +/- .030" flaps are allowed."
In GCR section 9.1.1.I.2.F.h, clarify as follows:
"Gurney flaps are permitted as an option for installation on the trailing edge upper surface of the wing element. They must be
attached in a secure fashion, without modification to the wing element except for mounting hardware. Total height
is Only .250” +/- .030" flaps are allowed on one or both elements."

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."

In Formula Enterprises, GCR 9.1.1.I.2.H.b, change as follows:
"Front Springs: 600 lbs. ±25 lbs. Faulkner Part # WM203008 or Hypercoil Part # WM203011
Rear Springs: 1000 lbs. ±25 lbs. Faulkner Part # WM203009 or Hypercoil Part # WM203012 or
Front Springs: 800 lbs. ±25 lbs. Hypercoil Part # WM203013, Silver
Rear Springs: 900 lbs. ±25 lbs. Hypercoil Part # WM203014, Silver
Effective November 1, 2020, Part # WM203013 Front and Part # WM203014 Rear will be requiredfor FE2 and optional for FE."

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.

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.
G.
Mazda 13B
Streetport
Rotary n/a n/a
One (1) 2-bbl auto-type carb or throttle body. Intake manifold shall have
individual runners connecting one throttle plate/butterfly to one rotor,
only. No balance tubes or other devices shall connect runners between
rotors.
44mm 1230
H. Mazda 13B
Rotary NA NA Peripheral Port 36mm SIR 1230
I. E.
Ford
Duratec/
Mazda MZR/
Ford Duratec
1615 4 2.0L engine destroked to 1615cc n/a 1175
J. F.
Ford
Duratec/
Mazda MZR/
Ford Duratec
2296 4 Maximum compression permitted 14.0:1 30mm SIR 1375

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

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."

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."

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.

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."

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."

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.**

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."

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."

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."

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:"

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"

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."

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."

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)"

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

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"

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."

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

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."

In FA Table 2, add a new spec line as follows:
Table 2
Car Engine Wheel
Width
(in)
± .060
Aero Transmission Weigh

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

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."

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)"

RM 23-07, USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC, GCR section 9.1.1.B.1, add a new section and re-letter the
following sections accordingly:
"c. The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine is added as a "spec line" car in
Formula Continental. Additional "spec line" cars are disfavored, and Balance of Performance (BoP) adjustments to keep "spec
line" cars competitive with cars that meet the class formula are likewise disfavored."
In FC, GCR section 9.1.1.B.11, add the following:
"The only permitted engines are:
a. The Ford 2 liter single overhead camshaft "NE" series engine or the 1971-74 Pinto/Capri 2 liter single overhead camshaft
engine. The specifications are contained in B.15.
b. The Ford Zetec ZX3 2 liter dual overhead camshaft engine. The specifications are contained in B.16.
c. The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."
In FC, GCR section 9.1.1.B, add the following:
In FX, GCR section 9.1.1.J.B, change as follows and renumber the remaining lines accordingly:
"3. USF2000 (tube frame) – Shall comply with FRP F2000 Technical Specifications (2018)
4. Pro Formula F2000 (tube frame) – Engine must be prepared to current FC rules."
In FX Table 1, remove the USF2000 Tube Frame and Pro Formula F2000 Tube Frame spec lines in their entirety.
Spec Line Cars Table

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

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

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."

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."