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.

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 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 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 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 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."