STL at Virginia International Raceway

2020-03-01 STL Request to add wheel part numbers

#28342 from SCCA Staff · Rule change · TB 20-03 (2020-03 Fastrack)

In STL, Mazda Spec MX5 Challenge, add wheel part numbers to the notes as follows:
"0000-04-5706-GM, 0000-04-5706-SL"

2020-04-01 STL Change GM LNF 2.0 Allowance to LSJ Engine for Viable STL 2.0

#27884 from David Mead · Rule change · TB 20-04 (2020-04 Fastrack)

In STU, GM Ecotech LNF Spec Lines, add to Notes as follows:
“LNF Engine Permitted with turbocharger removed. LNF Engine short block with LE5 cylinder head and
intake manifold permitted. Must meet all other STL specifications.”

2020-04-01 STL Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat

#28663 from Club Racing Board · Rule change · TB 20-04 (2020-04 Fastrack)

In STL, Mazda MZR Table A, change the restrictor size in the notes as follows:
"54 53mm"

2020-04-01 STL Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53

#28664 from Club Racing Board · Rule change · TB 20-04 (2020-04 Fastrack)

In STL, Mazda MZR Table A, change the restrictor size in the notes as follows:
"55 53mm"

2020-05-01 STL STL Honda B18 restrictor changes

#28794 from Club Racing Board · Rule change · TB 20-05 (2019-05 Fastrack)

In STL Spec Lines, Honda B18, change as follows:
"53mm flat plate restrictor required."
In STL Spec Lines, change as follows:
"Acura/Honda B18C (JDM Type R), B18C1, B18C5 (USDM Type R), B18C6 (UK and Euro Type R), B18C7
(Australia Type R)"
In STL Spec Lines, Acura/Honda B18C (JDM Type R), B18C5 (USDM Type R), B18C6 (UK and Euro Type R),
B18C7 (Australia Type R), change notes as follows:
"Any porting and or polishing of intake and or exhaust ports outside of the 1” port matching allowance,

2020-06-01 STL Request to add 2016-2019 GMX-5 Spec line

#28604 from Josh Smith · Rule change · TB 20-06 (2020-06 Fastrack)

In STL, classify the Mazda MX-5 Global Cup (16-18) as follows:
STL Maximum
Displacement (cc's) Minimum Weight Notes
Mazda MX-5
Global Cup
(16-18)
2000 2450 Must meet all MX-5 Global Cup
rules. Any OEM or aftermarket

2020-06-01 STL Request to update PN for MX-5

#28622 from SCCA Staff · Rule change · TB 20-06 (2020-06 Fastrack)

In STL, Mazda MX-5 / Club Model (06-15), make changes as follows:
"Allow Mazda header part number 0000-06-5407-NC."

2020-06-01 STL Correction - Clarification Honda/Acura B18B engine Letter # 26209

#28873 from Club Racing Board · Rule change · TB 20-06 (2020-06 Fastrack)

In STL, Table A, Acura/Honda B18 (except C engine) change as follows:
"Acura/Honda B18 (except C1 engine)"
In STL, Table A, Acura/Honda B18 (except C engine) change Notes as follows:
"53 54mm"
In STL, Table A, Acura/Honda B18C (JDM Type R), B18C1, B18C5 (USDM Type R), B18C6 (UK and Euro
Type R), B18C7 (Australia Type R) change as follows:
"Acura/Honda B18C (JDM Type R), B18C1, B18C5 (USDM Type R), B18C6 (UK and Euro Type R), B18C7
(Australia Type R)"

2020-07-01 STL Request for Addition to GT3 Approved Turbo List

#27576 from Chris Edens · Rule change · TB 20-07 (2020-08 Fastrack)

In GT3, GCR section 9.1.2.F.7.h.6., add turbocharger as follows:
"d. Borg-Warner EFR6258"
In STU, GCR section 9.1.4.1.H.5, add turbocharger as follows:
"- Borg-Warner EFR6258"

2020-08-01 STL Minimum Weight Determination

#27695 from David Fiorelli · Rule change · TB 20-08 (2020-08 Fastrack)

In STU, GCR section 9.1.4.10., add the following:
"All weight adjustments for engines shall be applied first, then that total is to be used as the baseline for
any chassis-related weight adjustments. Chassis related adjustment that are percentage based are
performed by adding specified percent first and subtracting specified percentage second if necessary.
Final step is addition or subtraction of specified weight in pounds."
In STL, GCR Section 9.1.4.4., add the following:
"All weight adjustments for engines shall be applied first, then that total is to be used as the baseline for
any chassis-related weight adjustments. Chassis related adjustment that are percentage based are

2020-08-01 STL ST Gurney flap Wicker clarification

#29012 from SCCA Staff · Rule change · TB 20-08 (2020-08 Fastrack)

In GCR section 9.1.4.D.4, clarify wording as follows:
"d. Wings shall be a single element with a maximum chord length of 8.50 inches, including
any wicker Gurney flap."
"f. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be mounted
a minimum of 6.0 inches below the peak of the roof or roll cage main hoop whichever is higher,
measured at the highest point. Cars with a wagonback/notchback/hatchback style body may have the
rear wing assembly, including the end plates and any wicker Gurney flap, mounted a maximum of
4.0inches above the highest point of the roof."

2020-12-01 STL Request clarification on wing measurement

#29640 from Jose De Miguel · Rule change · TB 20-12 (2020-12 Fastrack)

IN ST, GCR Section 9.1.4.D.4.e, add the following:
"Unless otherwise specified in the applicable rules the measurement of aero dynamic devices and reference areas shall include
end plates but not include fasteners as long as the fasteners serve no other purpose. Fasteners may protrude no more than 1/2”
from the mounting surface."

2021-01-01 STL Request for FWD and RWD Parity

#29728 from Tom Fowler · Rule change · TB 21-01 (2021-01 Fastrack)

In STL, GCR Section 9.1.4.2.H.2, change as follows:
"Rear wheel drive cars with strut front suspension must add 3 0.5 percent to their baseline STL weight. All other rear wheel drive
cars must add 5.5 2.5 percent to their standard baseline STL weight."

2021-01-01 STL Request to Remove Honda F20C 2% Weight Penalty

#29815 from David Mead · Rule change · TB 21-01 (2021-01 Fastrack)

In STL Spec Lines, Honda F20C, change Minimum Weight as follows:
"Chart + 2%"

2021-01-01 STL Request for FWD and RWD Parity

#30023 from Club Racing Board · Rule change · TB 21-01 (2021-01 Fastrack)

In STL, Table A, Acura/Honda B16, change Notes as follows:
"54 53mm flat plate restrictor required."
In STL, Table A, Acura/Honda B17, change Notes as follows:
"54 53mm flat plate restrictor required."
In STL, Table A, Acura/Honda B18C1, change Notes as follows:
"54 53mm flat plate restrictor required."
In STL, Table A, Acura/Honda B18C (JDM Type R), B18C5 (USDM Type R), B18C6 (UK and Euro Type R), B18C7 (Australia Type R),
change Notes as follows:

2021-02-01 STL Brake Component Relocation

#29990 from Christopher Childs · Rule change · TB 21-02 (2021-02 Fastrack)

In ST, Section 9.1.4.N.1., add the following:
"ABS actuation hardware and wiring may be relocated anywhere within the engine compartment."

2021-02-01 STL Super Touring Wing Clarification

#30111 from Greg Maloy · Rule change · TB 21-02 (2021-02 Fastrack)

In GCR, Section 9.1.4.D.g, change as follows:
"The trailing edge of the rear wing, including end plates and gurney flap, may be mounted no further rearward than the center
of the rearmost part approved bodywork."

2021-02-01 STL Transmission Options

#30118 from John Warren · Rule change · TB 21-02 (2021-02 Fastrack)

In STL, Section 9.4.1.2.C.2, change as follows:
"Either the original transmission or an alternate transmission must be used; the alternate transmission must be from the same
manufacturer as the vehicle (i.e., an Acura transmission may be installed in a Honda car). Alternate transmissions must be used
in their entirety; any OEM gear sets (drive and driven gear pairs) that fit w/o any modifications to gears, shafts, and/or case are
permitted. Modifications to input shafts for fitment are allowed."

2021-03-01 STL GM Ecotec engines in STL

#30247 from Tim DeRonne · Rule change · TB 21-03 (2021-03 Fastrack)

In STL, Table B, change GM Ecotech LNF, as follows:
"GM Ecotech LNF"
In STL, Table B, GM Ecotech LNF, add to Notes as follows:
"Any combination of GM Ecotech engine family permitted. Must use 55mm flat plate restrictor. Must meet all other STL
specifications."

2021-03-01 STL Super Touring Alternate Miata Hubs

#30345 from Club Racing Board · Rule change · TB 21-03 (2021-03 Fastrack)

In ST, GCR section 9.1.4.M, add alternate front wheel hubs as follows:
"18. Allow alternate front wheel front hubs for the 90-05 Mazda Miata:
Mazda Motorsports Development Part #0000-04-5HUB-S1"

2021-04-01 STL ST Oil Coolers E&O Correction to 9.1.4.2.H

#30388 from Philip Royle · Rule change · TB 21-04 (2021-04 Fastrack)

In ST, section 9.1.4.G.14, change as follows:
"Vents, breathers, and oil filters and oil coolers may be added, or substituted. All emission control devices may be removed and
the resulting holes plugged."

2021-05-01 STL Solstice Ride Height

#30183 from Tim DeRonne · Rule change · TB 21-05 (2021-05 Fastrack)

In STL Table B, Pontiac Solstice/SaturnSky, add to notes as follows:
"4" ride height allowed."

2021-05-01 STL Request Mazda B5 DOHC

#30420 from Derrick Ambrose · Rule change · TB 21-05 (2021-05 Fastrack)

In STL Table A, classify Mazda B5 DOHC as follows:
STL Maximum Displacement (cc's) Minimum Weight Notes
Mazda B5 DOHC Chart Must meet ALL STL regulations.

2021-05-01 STL Honda B16A (JDM) Restrictor change

#30531 from Club Racing Board · Rule change · TB 21-05 (2021-05 Fastrack)

In STL Table B, Honda B16A (JDM), change notes as follows:
"54 53mm"

2021-06-01 STL VW Engine Request

#30625 from PABLO GASTALDI · Rule change · TB 21-06 (2021-06 Fastrack)

In STL Spec Lines, classify Volkswagen 2.0L TFSI, as follows:
STL Maximum Displacement
(cc's) Minimum Weight Notes
Volkswagen 2.0 TFSI 1984 Chart Engine Permitted with turbocharger
removed. Must meet all other STL
specifications.

2021-09-01 STL Request to clean up Spec MX-5 Redundancy

#31069 from SCCA Staff · Rule change · TB 21-09 (2021-09 Fastrack)

In STL, Mazda Spec MX-5, remove redundant spec line as follows:
"Mazda Spec MX-5. 2000cc. 2600lbs. Must Comply with 2014 SCCA Spec MX-5 Regulations."

2022-01-01 STL Throttling Device Clarification

#31323 from Jose de Miguel · Rule change · TB 22-01 (2022-01 Fastrack)

In GCR, Section 9.1.4.1.B.4., change as follows:
"The intake and exhaust porting on piston engines is free. Porting of intake manifolds and cylinder heads is free on piston
engines."

2022-01-01 STL Mazda Renesis Restriction

#31467 from Christopher Childs · Rule change · TB 22-01 (2022-01 Fastrack)

In STL Spec Lines, Mazda Renesis, change Notes as follows:
"55 60mm flat plate restrictor required."

2022-01-01 STL Clarification of 79-85 RX7 Spec line

#31621 from Daniel Sheppard · Rule change · TB 22-01 (2022-01 Fastrack)

In STL, Mazda RX-7 12A (79-85), change notes as follows:
"Stock Nikki 4 bbl carburetor on a stock manifold only. Allow the standard removal of emissions related components, and allow
air and fuel jets to be corrected. Modification of the water jacket in the area of the spark plug for cooling purposes is permitted."

2022-03-01 STL Single TB Weight Modifiers

#31449 from John Weisberg · Rule change · TB 22-03 (2022-03 Fastrack)

Effective 5.1.2022 In STU, GCR Section 9.1.4.H.1., change as follows:
"1. Minimum weights for cars with normally aspirated piston engines will be determined by 1.1 lbs/cc displacement for the
installed engine (see following table) the following table. Displacement is the stock displacement for the installed engine. For the
purpose of weight assignment, engine displacement will be rounded to the nearest 50cc (e.g., 2176cc = 2200cc and 2175cc =
2150cc)."
Factory Engine Displacement (cc) Minimum Weight (lbs)

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

2022-03-01 STL Improved Touring Tires

#32063 from Greg Amy · Rule change · TB 22-03 (2022-03 Fastrack)

In STU Table B, Improved Touring Vehicles (1985-), change Notes as follows:
"Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels"
In STL Table B, ITA-spec and ITS-spec RX7, change Notes as follows:
"Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels"
In STL Table B, ITS, ITA, ITB, or ITC vehicles (1985- ), change Notes as follows:
"Must completely conform to ITCS requirements. Tires must conform to 9.1.4, Tires & Wheels"

2023-01-01 STL Spec MX5 in STL

#33473 from Tom Bogar · Rule change · TB 23-01 (2023-01 Fastrack)

In STL, Table B: Alternate Vehicle and Engine Allowances, Mazda Spec MX5 Challenge, change notes as follows:
"ACT clutch 0000-02-5004-G6, wheels 17x8 #0000-04-5706-GM, # 0000-04- 5706-SL, and Toyo RR 235-40-17 dry, Toyo RA1 235-
40-17 wet. Alternative tires on 17x7 wheels per STL rules. No other Super Touring modifications or allowances permitted except
as noted in this spec line."

2023-06-01 STL Clarify STL table B - IT spec notes on Tires

#34187 from Austin Hilliard · Rule change · TB 23-06 (2023-05 Fastrack)

In STL Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Notes as follows:
ITA-spec and ITS-spec RX7: "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires & Wheels. Tires
must also conform to 9.1.4.2.Tires."
ITS, ITA, ITB, or ITC vehicles (1985- ): "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires &
Wheels. Tires must also conform to 9.1.4.2.Tires."