---

SOLO EVENTS BOARD | August 24th

The Solo Events Board met by conference call August 24th. Attending were SEB members Mark Labbancz, Marshall Grice, Nick Dunlap, Bob Davis, Zack Barnes, Keith Brown, and Mark Scroggs; KJ Christopher and Clay Turner of the BOD; Rick Myers and Brian Mason of the National Staff. These minutes are presented in topical order rather than the order discussed. Comments regarding items published herein should be directed via the website www.soloeventsboard.com.

Unless indicated otherwise, the implementation date for all new proposals published herein is 1/1/2023.

Recommended Items

The following subjects will be referred to the Board of Directors for approval. Address all comments, both for and against, to the Solo Events Board. Member input is suggested and encouraged. Please send your comments via the form at www.soloeventsboard.com.

General

#30558 SUV eligibility for Solo

The SEB is recommending a change to 3.1 to clarify the eligibility of SUVs, minivans, and pickups to compete in solo events. These vehicles are permitted to participate in solo events provided they meet the rollover guidelines within Section 3.1.

"3.1 Eligible Vehicles
A Solo® event is open to any vehicle that can pass safety (tech) inspection, has the minimum bodywork specified by these Rules, and is properly muffled, except that vehicles with wheelbases exceeding 116” may be excluded by the Event Chairman if he determines, at his discretion, that they cannot readily negotiate the course. This decision shall be made in advance if possible and included in the advance publicity and supplementary regulations. Cars need not be licensed or licensable for road use, so long as they otherwise comply with the SCCA® Solo® Rules.

Models and option packages designated as being of a model year later than the current year are not eligible to compete in National Tour or Solo® National Championships, unless they have been specifically classed by the SEB. A newly-classed model or option package is not eligible for the current year’s Solo® National Championships unless its listing was published no later than the July issue of the official SCCA® publication.

Unstable vehicles with a high center of gravity and a narrow track that do not meet the rollover guidelines below, including such as SUVs, minivans, and 4WD pickups, must be excluded. Examples of such vehicles are listed in Appendix A. Extra caution should be exercised with non-traditional vehicles (e.g., trucks using racing slicks)."

Member Advisories

Event Operations

#31220 Clarify lines over 1s on two driver cars

Thank you for your letter. Unused numbers and classes should be completely covered to comply with 3.7.B.

Tire Rack Solo Nationals

#27564 Heat Population at Nationals

Thank you for your letter. The National Staff and Nationals Committee strive to balance the numbers within heats to the best of their ability. The SEB would also like to remind members and officials that the “5 minute rule” that is outlined in the Solo Nationals Supplemental Regulations is a minimum time between runs.

#30828 Run / Work order for Nats

Thank you for your letter. The SEB and National Staff seek to balance the number of participants across run days and alternate those run days year to year where possible.

Street Category

#32941 Clarify 13.3.A

Thank you for your letter.
In order to meet the requirements of Section 13.3.A.1 and 13.3.A.4, tires must have both the UTQG Treadwear Grade of 200 as well as the DOT-approval stamped into the tire

Change Proposals

Street Prepared Category

#32714 Street Prepared Classing Proposal

The SPAC thanks the membership for their feedback on proposal #32714 “Street Prepared Classing Proposal” in the July 2022 Fastrack.
After reviewing the feedback and the proposal the SPAC has the following revisions to the original proposal:

• Moving the GT350/GT350R to DSP full prep
• Moving the full prep E90/E92/E93 M3 to ASP and limited prep DSP
• Adding the Mazda RX-8 to DSP limited prep
• Moving some high power “Super Pony” cars to ASP full prep and limited prep BSP

Updated proposed listings (changes from prior version shown in blue):

SSP:
     All current SSP classings
ASP:
     All current SSP classings
     BMW
          M3 (E90, E92, E93) (2007-13)
     Chevrolet
          Camaro ZL1 (2017-19)
          Camaro ZL1 (2012-13)
     Ford
          Mustang Shelby GT500 (S197) (2011-14)
     Audi
          A4 (2008-16)
          A4 (2000-03)
          A4 (2010-16)
     Bricklin
     Chevrolet
          Camaro ZL1 (2017-19)
          Camaro ZL1 (2012-13)
     DeLorean
     DeTomaso
          Mangusta (all)
          Pantera (all)
     Dodge
          Stealth Turbo
     Ferrari
          250 (non-LM)
          275
          308 Coupe & Spider
          330
          348
          365 Daytona GTB, GTC
     Ford
          Focus RS (2016-17)
          Mustang Shelby GT350/GT350R (S550) (2015-16)
          Mustang Shelby GT500 (S197) (2011-14)
          Mustang Shelby GT500 (2020) *Limited Prep*
     Jaguar
          E-Type (all)
     Mercedes-Benz
          CLK 320 & CLK 32 AMG
          E36 AMG (2010-16)
          SLK55 AMG (R171) (2004-11)
     Mitsubishi
          3000GT Turbo
     Pontiac & Saturn
          Solstice GXP & Sky Redline
     Toyota
          MR2 (all incl. Turbo) (1991-95)
     Volvo
          S60R & V70R (2004-07)
BSP:
     Alfa Romeo
          4C *Limited Prep*
     BMW
          M Coupe, M Roadster, & Z3 (6-cyl; all)
          Z4 (non-turbo; all incl. M)
     Chrysler
          Crossfire SRT6
     Fiat
          124 Spider (2016-20)
     Honda
          S2000
     Mazda
          Mazdaspeed Miata
          MX-5 (2006-2015)
          MX-5 Miata (ND chassis, all) (2016-19)
          RX-7 Turbo (1986-92)
     Pontiac
          Firebird Firehawk SLP (3rd gen, 383cid) (1990-92)
          Firebird Firehawk SLP (4th gen, 383cid) (1993-2002)
     Saleen
          Mustang S281E & Mustang (NOC)
     Triumph
          TR-8
     Audi
          A4 (2008-16)
          A4 (2000-03)
          A4 (2010-16)
     Bricklin
     Chevrolet
          Camaro ZL1 (2017-19) *Limited Prep*
          Camaro ZL1 (2012-13) *Limited Prep*
     DeLorean
     DeTomaso
          Mangusta (all)
          Pantera (all)
     Dodge
          Stealth Turbo
     Ferrari
          250 (non-LM)
          275
          308 Coupe & Spider
          330
          348
          365 Daytona GTB, GTC
     Ford
          Focus RS (2016-17)
          Mustang Shelby GT350/GT350R (S550) (2015-16)
          Mustang Shelby GT500 (S197) (2011-14) *Limited Prep*
          Mustang Shelby GT500 (2020) *Limited Prep*
     Jaguar
          E-Type (all)
     Mercedes-Benz
          CLK 320 & CLK 32 AMG
          E36 AMG (2010-16)
          SLK55 AMG (R171) (2004-11)
     Toyota
          MR2 (all incl. Turbo) (1991-95)
     Volvo
          S60R & V70R (2004-07)
     BMW
          M3 (E30 chassis)
     Scion & Subaru
          FR-S & BRZ (2013-14)
     Mazda
          MX-5 (2006-2015) *Limited Prep*
          RX-8
     BMW
          M3 (E90, E92, E93) (2007-13)
CSP:
     BMW
          M3 (E30 chassis)
     Scion & Subaru
          FR-S & BRZ (2013-14)
     Mitsubishi
          3000GT Turbo
     Pontiac & Saturn
          Solstice GXP & Sky Redline
     Alfa Romeo
          4C *Limited Prep*
     BMW
          M Coupe, M Roadster, & Z3 (6-cyl; all)
          Z4 (non-turbo; all incl. M)
     Chrysler
          Crossfire SRT6
     Fiat
          124 Spider (2016-20)
     Honda
          S2000
     Mazda
          Mazdaspeed Miata
          MX-5 (2006-2015)
          MX-5 Miata (ND chassis, all) (2016-19)
          RX-7 Turbo (1986-92)
     Triumph
          TR-8
DSP:
     BMW
          M3 (E90, E92, E93) (2007-13) *Limited Prep*
     Ford
          Mustang Shelby GT350/GT350R (S550) (2015-16)
     Mazda
          RX-8 *Limited Prep*
     Kia
          Forte Koup (2010-12)
     Mazda
          MX-5 (2006-2015) *Limited Prep*
          RX-8
     All current ESP classings other than BMW M3 (E90, E92, E93) (2007-13)
     Pontiac
          Firebird Firehawk SLP (3rd gen, 383cid) (1990-92)
          Firebird Firehawk SLP (4th gen, 383cid) (1993-2002)
     Saleen
          Mustang S281E & Mustang (NOC)
ESP:
     All current ESP classings
     All current FSP classings
     Kia
          Forte Koup (2010_12)
FSP:
     All current FSP classings

Not Recommended

General

#32971 More Spec Car classes???

Thank you for your letter.

Event Operations

#31490 Request for 12-15 Year Old Passengers at National Events

Thank you for your letter. The SEB does not believe that allowing passengers of any age (unless where required by law such as for individuals with learner’s permits) is appropriate at National events

Street Category

#33021 Tesla Model 3 performance with hoosiers

Thank you for your letter. The SAC believes the Tesla Model 3 is not appropriate for SSR.

#33038 It’s time to move the Pontiac Solstice to E Street

Thank you for your letter. The SAC believes the Solstice is appropriately classed at this time.

#33052 Please consider allowing Magnaride Controllers for Applicable Cars

Thank you for your letter. The SAC does not believe expanding the electronic/magnetic shock allowances beyond Super Street is appropriate at this time.

#33053 Steering wheel

Thank you for your letter. Please see the response to letter number #32101 published in the April 2022 Fastrack.

#33066 Allowance for removal of diff damper on 1994-2005 miatas

Thank you for your letter. The SAC does not feel that removal or modification of differential dampers is appropriate for the Street category or meets the definition of an industry-standard repair.

#33071 Adaptive Shock Controllers For All Street Classes

Thank you for your letter. The SAC does not believe expanding the electronic/magnetic shock allowances beyond Super Street is appropriate at this time.

#33079 Propose moving 718 Base model to BS

Thank you for your letter. The SAC believes the Porsche 718 base is appropriately classed at this time.

Other Items Reviewed

General

#28107 Fastrack Effective Dates

Thank you for your letter. The SEB is working on and evaluating options for better communicating rule change proposals and providing members with an easier way to find this information.

#28277 Longer Term Direction of the Solo Nationals?

Thank you for your letter. The SEB and National Staff continue to work closely to ensure that all of the Solo Nationals participants receive a quality experience. Whether that be focused on competition or the social aspects of Solo Nationals.

#28701 Why are you not doing 21st century things?

Thank you for your input. SCCA has limited staff and logistical resources to support these kinds of services, but the SEB agrees that some of them would be valuable additions. Member/volunteer initiatives to organize and provide capabilities such as these would be welcome, and interested individuals can contact the National Office to coordinate such efforts.

#32942 Prosolo Bump Solution

Thank you for your letter. Your suggestions have been forwarded to Brian Mason at the National Office.

#32970 Allow TireRack Logo relocation for vehicles w/ collision cameras

Thank you for your letter. The National Staff are working with Tire Rack on a solution.

Event Operations

#31086 Get rid of impound at pro solo

Thank you for your letter. For Pro Solo classing and rules concerns outside of the purview of the SEB please contact Brian Mason at bmason@scca.com.

#31216 Time to exclude FSAE from competing at Nationals

Thank you for your input.

#31222 Request New Nationals award.

Thank you for your letter. The SEB will discuss the idea with the National Staff.

#31263 Solo Weight Rule

Thank you for your letter. The SEB is aware of the sometimes seemingly inconsistent penalties being applied during the protest process, and is working to formalize a more thorough approach for determining penalties for noncompliance with the Solo Rules and the Supplemental Regulations. As a reminder, the possible penalties are outlined in Section 9.4 of the Solo Rules.

#33025, 33026, 33027, 33106, 33109 Driver of Eminence Nominations (various)

Thank you for your nominations.

#33101, 33115 Solo Cup Nominations (various)

Thank you for your nominations.

#33102, Solo Cup and Driver of Eminence Awards

Thank you for your nomination.

Handled Elsewhere

Street Category

#33000 2023 Type R to BS

Please see the response to letter #32758 published in the August 2022 Fastrack.

#33054 2022 Audi RS3

Please see the response to letter #32782 published in the September 2022 Fastrack.

Tech Bulletins

Street Category

#32766 Rules clarification on strut tower brace

Thank you for your letter. Per the SAC, add the following new listing in Appendix A:

F Street
     CHEVROLET
          Camaro (V6, 1LE) (2017-22)
          Camaro (V6 & V8; excl. SS 1LE, ZL1, Suspension Lowering Kit, and Brembo® 6-piston Front Brake
Kit) (2016-22)
          Camaro SS 1LE (V8) (2017-22)
          Camaro V6 & V8 SS (non-Incl 1LE, non-ZL1) (2016-22)
               (Including The Following Dealer Installed Manufacturer Options: Suspension Lowering Kit, 1LE
Spec Suspension Package, Brembo® 6-piston Front Brake Kit, 6.2L Strut Tower Brace)

#33001 Dodge Challenger V-6 classing

Per the SAC, update the following listing in Appendix A:

G Street
     Dodge
          Challenger (V6) (2008-2022)

#33003 Class 2023 integra

Per the SAC, make the following addition to Appendix A:

G Street
     Acura
          Integra (Base, ASpec) (2023)

#33015 2023 BRZ / 86 Classing

Per the SAC, update the following listing in Appendix A:

D Street
     Subaru
          BRZ (2022-2023)

#33086 996 Porsche Listings in AS & BS

Per the SAC, correct the following error in Appendix A:

A Street
     Porsche
          911 (996, non-turbo) (1998-2005)
B Street
     Porsche
          911 (996, non-turbo) (1998-2004 2005)

#33092 2023 Corvette C8 Classing

Per the SAC, update the following listing in Appendix A:

Super Street
     Chevrolet
          Corvette Stingray (C8, non-Z06) (2020-2023)

Download or View PDF

---

SOLO EVENTS BOARD | July 27th

The Solo Events Board met by conference call July 27th. Attending were SEB members Mark Labbancz, Nick Dunlap, Bob Davis, Marshall Grice, Zack Barnes, Keith Brown, and Mark Scroggs; KJ Christopher and Clay Turner of the BOD; Rick Myers of the National Staff. These minutes are presented in topical order rather than the order discussed. Comments regarding items published herein should be directed via the website www.soloeventsboard.com.

Unless indicated otherwise, the implementation date for all new proposals published herein is 1/1/2024.

Recommended Items

The following subjects will be referred to the Board of Directors for approval. Address all comments, both for and against, to the Solo Events Board. Member input is suggested and encouraged. Please send your comments via the form at www.soloeventsboard.com.

Safety

#32616 New NorPac DSSS

The SSC and SEB recommend the appointment of Bob Forsberg as the new Divisional Solo Safety Steward for the Northern Pacific Division to replace James Shepard, who has submitted his resignation pending the appointment of his replacement.

General

#30826 Sound Regulations clarification

The SEB is recommending the following change to the Appendix H – Sound Measurement Procedures to clarify the maximum allowed vehicle sound.

Change text in Appendix H as follows:

The maximum allowed vehicle sound level will be 100.0 dBA.

If a driver in a vehicle exceeds 100.0 dBA, the driver will be allowed to attempt a viable remedy to functionally alter the exhaust system to reduce the sound level of the vehicle before his/her next run that day.

Modified Category

#30269 DM turbo engine inlet restriction

The MAC is recommending the following rule change proposal:

18.1.D.6:
Supercharging and turbocharging are permitted for all engines subject to the displacement factor of 18.B. In DM, such induction systems must have a restrictor on the inlet side of the turbo/supercharger. All inducted air must pass through this restrictor which must be constructed of metallic material. The minimum orifice (choke) of the restrictor shall be no greater than 33 mm (1.3”). The restrictor passage may be shaped fore and aft of the choke region. The restrictor choke region must be made of one piece without moving parts. Inlet restrictor must be mounted within 18" of turbo inlet. Tubing between the restrictor and turbo/supercharger inlet must be rigid and made from non expanding parts. The tubing inside diameter may not exceed 3" at any point. Flexible couplers may be used for connections.

Member Advisories

Street Category

#32811 Sway bar bushings

Thank you for your letter. Section 13.7.A only permits modifications to a single sway bar and its supporting hardware.

Street Prepared Category

#32607 SP Bushing clarification

The SPAC would like to remind members that 15.8.C allows for offset bushings to be used and this rule does not restrict the use of offset bushings to only those installed into control arms. A suspension bushing installed into an upright or knuckle may be replaced with an offset bushing so long as it meets the other requirements of 15.8.C.

Change Proposals

Street Category

#30543 Update section 13.9.G.

Based on member input, the SAC is seeking additional member feedback on a revised version of the previously-published proposal to change Section 13.9. A previous version can be found in the August 2021 Fastrack. The revised proposal is as follows:

“G. On cars without the ability to turn off electronic stability control and/or traction control (ESC/TC) from the manufacturer, modifications to defeat the ESC/TC are permitted. These modification are limited to altering the inputs to the ESC/TC processor (e.g., removing fuses, unplugging yaw or steering angle sensors, altering signals) and may serve no other purpose. Any codes or error lights resulting from ESC/TC modifications are permitted.

Use of alternate OEM ESC/TC modes are permitted so long as the alternate OEM modes are accessible though menus (e.g. "dyno mode") or driver-control inputs (e.g. button/pedal press sequences), or coding using an OBD tool (e.g. "VAG-COM"). Manufacturer authorized, vehicle-specific OEM ESC/TC software upgrades / updates are allowed; non-OEM modification of tables/algorithms/parameters is specifically prohibited. Modifications may serve no other purpose. Any resulting OBD codes or error lights resulting from allowed ESC/TC modifications are permitted."

H. Manufacturer authorized, vehicle-specific OEM ESC/TC software upgrades / updates are allowed; nonOEM modification of tables/algorithms/parameters is specifically prohibited. Modifications may serve no other purpose.

I. The use of an OEM type coding tool to enable a factory specified TC/ESC OFF mode otherwise not accessible is allowed. This should not be interpreted as an allowance to replace, reprogram, tune, or otherwise modify any other performance related parameters beyond Comfort and Convenience per 13.2.A."

#32774 Genesis G70 2.0T vs. 3.3T Classification

The SAC is seeking member feedback on the following changes to Appendix A:

F Street
     Hyundai
          Genesis G70 (2018-22)
F Street
     Hyundai
          Genesis G70 (V6 Turbo) (2019-22)
G Street
     Hyundai
          Genesis G70 (4-cyl Turbo) (2019-22)

Prepared Category

#31128 Section 17.B

The PAC is looking for additional member feedback on removing the GCR allowance from CP. Cars beyond the Prepared allowances may still run in X Prepared under current 17.11.A. This means they will have to follow either Solo OR GCR. They cannot mix allowances.

This proposal was previously published in the March Fastrack, and has an intended implementation date of 1/1/2023.

The following changes are suggested in this proposal:

Section 17:
17.2.D. Replacement of any chassis component (e.g., subframe) in its entirety by one of alternate construction, unless specifically permitted, shall result in the vehicle being “in excess” of these rules which will invoke Section 17.11 weight adjustments. in Appendix A.

17.11.A. Vehicles competing in C Prepared (CP) class, should refer to section 17.11.B. Vehicles prepared in excess of Solo® allowances and prepared up to either the current Club Racing GT or Production Category rules are permitted to compete in X Prepared (XP) class. Tube-frame production cars and kitcars specifically listed in Appendix A (i.e., Shelby Cobra) are subject to the requirements in the relevant Appendix. Tube frame versions of production vehicles (e.g., a tube-frame Mazda RX-7) are considered in excess of the rules and must comply with the requirements in this Section. Section 17.8.B.5 minimum track
requirements apply. Minimum weight will be GCR minimum plus any Solo® weight adjustments (wheel size weight increases, etc.). Vehicles taking advantage of this allowance may only use the Club Racing GCR (General Competition Rules) allowances in whole. Cars which are not listed in the GCR may not use this allowance and are limited to the modifications allowed in Section 17. For those cars which have been de-listed from the current year GCR, the appropriate specifications will be developed and added to Appendix A upon member request. An exception to the GCR will be that open cars are permitted provided they comply with all provisions of Section 17 pertaining specifically to open cars. The following items listed in the GCR, while recommended, are not required: Logbooks, annual inspections, roll cage, on-board fire systems, handheld fire extinguisher, scattershield/chain guards, master switch, steering wheel lock removal, window safety net, windshield safety clips and rear window safety straps, and braided steel brake lines. Single Inlet Restrictor (SIR) is not required. Due to the extent of modifications permitted on GT-derived cars classed within the Prepared category, it is possible for a replica car to meet the legality requirements for the corresponding original model provided that the engine, track, and wheelbase remain within the allowed specifications. In such a case, the replica is considered compliant for Prepared, provided it correctly meets all of the applicable GCR specifications.

17.11.B. C Prepared (CP) vehicles prepared in excess Solo® allowances and prepared up to either the current Road Racing GT or Production Category rules are permitted to compete in C Prepared (CP) as described in Appendix A. Tube-frame production cars and kit-cars specifically listed in Appendix A are subject to the requirements in the relevant Appendix A for CP. Tube-frame versions of production vehicles (i.e., a tube-frame Camaro), replacement subframes, and modified frame rails for tire clearance are considered in excess of the rules and must comply with the requirements in this Section Appendix A. Section 17.8.B.5 minimum track requirements apply. Minimum weight will be 110% of the Solo® minimum weight from in Appendix A. plus any Solo® weight adjustments (wheel size weight increases, etc.).

Vehicles taking advantage of this allowance may use the Solo® Rules or the Road Racing GCR (General Competition Rules) allowances in whole, in part, or in combination. Cars which are not listed in the GCR may not use this allowance and are limited to the modifi cations allowed in Section 17. For those cars which have been de-listed from the current year GCR, the appropriate specifications will be developed and added to Appendix A upon member request. An exception to the GCR will be that open cars are permitted provided they comply with all provisions of Section 17 pertaining specifically to open cars. The following items listed in the GCR, while recommended, are not required: Logbooks, annual inspections, roll cage, on-board fi re systems, hand-held fi re extinguisher, scattershield/chain guards, master switch, steering wheel lock removal, window safety net, windshield safety clips and GCR specifications. The 10% increase in minimum weight does apply to such cars.rear window safety straps, and braided steel brake lines. Single Inlet Restrictor (SIR) is not required. Due to the extent of modifi cations permitted on GT-derived cars classed within the Prepared category, it is possible for a replica car to meet the legality requirements for the corresponding original model provided that the engine, track, and wheelbase remain within the allowed specifications. In such a case, the replica is considered compliant for Prepared, provided it correctly meets all of the applicable

C B. Weight Calculations
Where there is a percentage addition as well as a specific weight addition, the percentage is added to the base weight before the specific weight addition. Examples:
• In Prepared class X (XP), the minimum weight for an AWD car with a 2.5L turbocharged engine is:
2.5L x 1.4 = 3.5L x 250 lbs. = 875 lbs. + 1200 lbs. = 2075 lbs.
• In Prepared class C (CP), the minimum weight for a car with a 302 ci (5.0L) engine prepared to Section 17.11 (e.g., GCR) allowances is:
2700 lbs. x 1.10 = 2970 lbs.

D C. Data acquisition/recording systems are permitted.

E D. Except where there are specific requirements in these rules, any safe line for fuel, hydraulic fluids, oil, water or breather is allowed.

F E. Ballast may be added to all cars as required to meet minimum weight provided it is securely mounted within the bodywork and serves no other purpose. Ballast plates may be installed beneath the floor pan so long as they do not protrude beyond its edges.

G F. All cars may have towing eyes, hooks, or straps which do not dangerously protrude from the bodywork.

H G. Removal of or modification to heating, ventilation, air conditioning, wiper/washer, audio, security, communication, and convenience systems is allowed provided the modification does not serve another purpose (e.g., an air conditioning compressor may not be modified to serve as a supercharger).

Appendix A:
CP
Unless otherwise listed, the minimum weights will be determined from the following tables according to engine type and displacement. Minimum weight is based on actual engine displacement. The block may be bored and/or sleeved to achieve allowed displacement.

Engine Coolant flow direction is unrestricted.

US-produced 4-cyl, 6-cyl, and 8-cyl engines are allowed alternate-stroke crankshafts; crank angles must remain standard.

Naturally aspirated cars using US-market 6-cyl and 8-cyl engines manufactured by a particular corporation may use any naturally aspirated 6-cyl or 8-cyl engine offered in a US-market vehicle by that corporation’s brands as listed below:
Ford: ……………………………………………………Ford, Mercury, and Lincoln
General Motors: ……. Chevrolet, Pontiac, Oldsmobile, GMC, and Buick
Chrysler: …………………………………………Chrysler, Dodge, and Plymouth

Alternate material (e.g., aluminum) engine blocks may be used on US produced 8-cyl engines. Any alternate engine block shall meet all other requirements of Section 17.

Forced induction cars may not substitute the engine for any other nor may forced induction engines be swapped into cars that the combination was not offered.

Engine displacement changes are allowed.

Alternate iron or aluminum cylinder heads may be used on US-produced 4-cyl, 6-cyl, and 8-cyl engines. Any alternate cylinder head(s) shall be of the same configuration (number of valves per cylinder and valve actuation method - e.g., OHV or OHC) as the original and shall be direct replacement type.

The floor in the driver/passenger compartment may be replaced but must maintain the basic shape and position of the original floor (i.e., flat and horizontal, relative to the car and rocker panels). It may not be curved, angled, recessed, or channeled between the rockers and may be made of steel and/or aluminum only. Replacement floors may be modified per Section 17.2.E.

The firewall between the engine compartment and driver/passenger compartment may be replaced but must be in approximately the same location as the original and must create a sealed bulkhead between engine and driver/passenger. Replacement firewalls may be made of steel and/or aluminum only and may be modified per Section 17.2.F.

An alternate hood is allowed which has a bulge no more than 4” (10.16 cm), measured off of the original base model hood, for induction clearance. The bulge may open to the front, to the rear, or to either or both sides. If the original base model hood has a 2” (50.8 mm) bulge, then an addition of 2” (50.8 mm) is allowed, if the base model has a 3” (76.2 mm) bulge, then 1” (25.4 mm) is allowed, etc.

The following weights apply unless a specific weight is indicated with the model listing.
Minimum weight without driver (lbs.):
V8 engines greater than 5100 cc ………………………………………….3000
V8 engines equal to or less than 5100 cc ……………………………… 2700
6-cyl engines, maximum 4500 cc ……………………………………….. 2450
Turbocharged 6-cyl engines, maximum 4500 cc ………………….. 2550
4-cyl engines (all) ……………………………………………………………… 2450
4 and 6 cyl engines (all)……………………………………………………….2600
Bolt In Replacement Subframe……………………………………………………..+150 per Subframe
Frame Rail Modification for Tire Clearance…………………………+150 for front or rear; +300 if both modified
Tube Frame greater than 5100cc……………………………….3300
Tube Frame equal to or less than 5100cc (all engine configurations)……………………..3000
-Tube Frame replacement vehicles must place 1st sparkplug hole of engine no further rearward than the centerline of front axle. Applies to all engine types.
-Tube Frame replacement vehicles MUST have a roll cage meeting Appendix C.H of the Solo Rulebook.
-Tube Frame replacement vehicles may modify internal body panels to facilitate the mounting of bodywork and fitting of roll cage.
-Tube Frame replacement vehicles may not modify any parts beyond what is allowed in Section 17 and Appendix A that is applicable to CP.

Maximum weight on the rear axle of the car shall be 51% of the total weight of the car. EXCEPTIONS: Corvair, Yenko Stinger.

Wheels may be replaced with a wheel having any diameter and any width without weight adjustments.

Not Recommended

General

#28440 Class consolidation

Thank you for your letter.

Street Category

#32735 Optional OEM Front lip and side skirts

Thank you for your letter. The parts referenced are only legal on WRX S209 model.

#32759 Time to move the 718 base and 981S to BS

Thank you for your input. The SAC believes the 718 and 981S are appropriately classed.

#32783 Audi TT-RS to BS

Thank you for your letter. The SAC believes the TT-RS is appropriately classed.

#32787 Sway bar reinforcement bracket

Thank you for your letter. Modifying an a-arm would be considered a performance benefit and therefore not legal for Street class competition.

Street Touring Category

#32105 Class 2013-’16 Chevy Spark EV in STH

Thank you for your letter. The STAC does not believe classing the Chevy Spark (including EV edition) is appropriate for the ST category.

Street Prepared Category

#30737 Class Cadillac ATS-V in ESP with Full Prep

The SEB and SPAC prefer not to introduce another full-prep listing into this class at this time, given that significant changes to the category are already in work.

#32753 SSP Limited Prep

Thank you for your input. The SPAC does not believe it is in the best interests of the category at this time to go back and re-list all cars but in limited prep. New classings are candidates for limited prep along with specific requests or popular cars.

Other Items Reviewed

Street Category

#32768 Rules for out of production cars

Thank you for your input.

Street Prepared Category

#32138 Hybrid Power Plant

Thank you for your input. The SCCA is currently evaluating the future of modifying electrified powertrains and until decisions are made at that level the SPAC will not be changing the rules around these types of powertrains.

#32224 Consider moving ND Miata to CSP

Thank you for your input. The SPAC recently released a proposal for classing changes in the July 2022 Fastrack which includes this proposal.

#32486 Support of Proposal #31855

Thank you for your input. Please look for a final decision on this proposal in a future Fastrack.

#32549 Move ND to CSP and make it LPSP in BSP

Thank you for your input. Please see the recent proposal from the SPAC in the July 2022 Fastrack.

#32640 DSP BMWs -> ESP

Thank you for your input. Please see the proposal from the SPAC on classing changes in the July 2022 Fastrack.

#32646 DSP BMWs to ESP helps everyone who actually runs in SP

Thank you for your input. Please see the proposal from the SPAC on classing changes in the July 2022 Fastrack.

#32719 Regarding classing change proposals in SP

Thank you for your letter. The SEB is not considering using PAX indexes as a form of class consolidation, and does not have any role in the determination of PAX index values.

Handled Elsewhere

Street Category

#32760 Time to move the 718 base and 981S to BS

Please see the response to letter #32759 published in the current Fastrack.

#32797 New Type R Classing

Please see the response to letter #32758 published in the August 2022 Fastrack.

Street Prepared Category

#32402 Hybrid Power Plant

Thank you for your input. Please see the response to item #32138 in this Fastrack.

#32467 Hybrid Power Plant More Data

Thank you for your input. Please see the response to item #32138 in this Fastrack.

#32495 My original letter is nearly a year old

Thank you for your input. Please see the response to item #30737 elsewhere in this Fastrack.

#32631 Wings on all things.

Please see the response to item #32630 in this Fastrack.

#32632 Splitter for full prep

Please see the response to item #32630 in this Fastrack.

#32662 Hybrid Power Plant More Data

Thank you for your input. Please see the response to item #32138 in this Fastrack.

Tech Bulletins

Event Operations

#33023 Language regarding firearms

Insert the following language into Section 1.3.2:

“Possession of firearms is only permitted in compliance with federal and local ordinances and per facility rules and regulations. Firearms are not permitted in competition vehicles while on course.”

This language was approved in 2016 and should have made it into rule books across all programs for the 2017 competition season.

Street Category

#32782 2022 Audi RS3 to BS

Per the SAC, make the following addition to Appendix A:

B Street
     Audi
          RS 3 (2022)

Street Prepared Category

#32510 Classing for 95-01 Metro/Swift

Per the SPAC, add the following classing to Appendix A:

FSP
     Chevrolet, Pontiac, Buick, Oldsmobile, Geo, & Suzuki
          Metro & Swift (1995-2001)

#32620 Lamborghini Gallardo listing years

Per the SPAC please update the following listing in Appendix A:

SSP
     Gallardo (all excluding Super Trofeo) (2003-1113)

Download or View PDF

Source