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2015 Solo Classing Rules - Commuter Cars Corporation

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1. 1380 Ibs C Performance Adjustments AWD S cer EE EE Add 200 Ibs Modified TUD imita Add 40 lbs D Weight Bias Adjustment w driver sitting in the driver s seat RWD w less than 51 weight on drive wheel Deduct 35 lbs p Deduct 35 lbs ENEE eege Not affected E MonirieD EM Modified Production and GT cars as follows A Weight w driver vs Displacement Piston engines up to including 3200 cc OHE 1700 Ibs Piston engines up to including 4500 cc pushrod OHV 1700 lbs 2 rotor rotary engines w unrestricted porting 1700 Ibs Piston engines unlimited displacement 1800 Ibs 3 rotor rotary engines w unrestricted porting 1800 lbs Electric powerplants non hybrid sss 1800 Ibs B Performance Adjustments AWD Add 300 Ibs Modified Tub nin siran niy imi aa Add 50 Ibs C Weight Bias Adjustment with driver sitting in the driver s seat 226 2015 SCCA Nationat SoLo RULES APPENDIX A FM MobpiriED RWD w less than 51 weight on drive wheels Deduct 50 lbs A Deduct 50 lbs F Mobirieo FM A Club Racing GCR compliant Formula 500 F5 with the following excep tions listed weights are with driver 1 F5 cars manufactured prior to the current requirement for rubber vibration isolati
2. 194 PREPARED CATEGORY sese eene 195 X Prepared Eb EN 195 2015 SCCA Nationat SoLo Rules 11 C Prepared GP di 199 D Prepared DP inrer diia 202 E Prepared EP iai aio 207 F Prepared EB cera i 214 MODIFIED CATEGORY ede di rrr tene eut uero etat 219 A Modified AM 219 B Modified BM iieiaeie ore edet aaa aa 219 C Modified CM itor et maala 220 D Modified DM aaa aalala d raped 226 E Modified EM 226 F Modified FM rtr reina la dae ree teer sic ed 227 APPENDIX B CLASSIC AMERICAN MUSCLE CAM 230 APPENDIX C SOLO ROLL BAR STANDARDS 232 A Basic Design Considerations ses 232 B Material aman rie ines ex kaka kalana rin adana xw Dad cuu 232 C Fabrication aaa 233 Di Bracing eC 233 E Mo ntirig Plates acierto rr etn k dak tiens 233 F Removable Roll Bars retire le d raka barya zira ee ea ad aha 234 G Installation on Cars of Space Frame and Frameless Design 234 Fi Roll Cages mama erae cue hn ee pa ev noe Eve epee 234 Roll Bar Padding iere dert tento ete rece hn 234 APPENDIX D SOLO TRIALS RULES eene 235 l PUD OSE Lm 235 Il Concept sia 235 Ill Procedure for SCCA Sanction 236 IV Site Selection and Course Design Approval 236 NAKS10107 GALE 237 MI Event Officials iaa NAGBANTANG NA A 2
3. Engine Rotary Piston only Modifications 1 No changes in the epitrochoidal curve of the motor are permitted 2 The capacity of the working chambers shall not be changed 3 The eccentric shaft may be replaced with another of the same basic material but no changes in the eccentricity or bearing journal di mensions are permitted 4 Rotors are unrestricted provided the material and number of lobes remains unchanged Cooling System 1 Cooling fan s may be modified substituted or removed Electrically operated cooling fan s may be installed provided it they serve no other purpose The use of any engine transmission and or differen tial oil cooler s is are permitted provided it they is are mounted completely within or under the bodywork but not in the driver pas senger compartment Associated oil cooler pumps and lines are per mitted for the transmission and differential Air ducts may be fitted to the oil cooler s as specifically authorized herein 2 Any water radiator is allowed provided there are no changes in the exterior bodywork to accommodate its use It shall not be located in the driver passenger compartment Separate expansion or header tank s are permitted provided they are not mounted in the driver passenger compartment The heater core may be removed entirely but not modified or replaced Water radiators may be filled with wa ter antifreeze and or nonflammable liquids the purpose of which is to tran
4. Substitution addition or removal of any anti roll bar s is permitted Bushing material method of attachment and locating points are unre stricted This does not authorize removal of a welded on part of a sub frame to accommodate the installation or the cutting of holes to route the bar or links Non standard lateral members which connect between the brackets for the bar including allowed strut bars per Section 15 2 C are permitted The bar may serve no other purpose which is not explicitly permitted else where herein Components such as anti roll bars and strut housings which serve dual purposes by also functioning as suspension locators may not be modified or substituted in ways which change the suspension geometry or steering geometry and may not be installed in positions e g upside down other than that ofthe original configuration 15 8 SUSPENSION Vehicles may only exceed the allowances of Section 13 8 as specified here in A Ride height may only be altered by suspension adjustments the use of spacing blocks leaf spring shackles torsion bar levers or change or modification of springs or coil spring perches This does not allow the use of spacers which alter suspension geometry such as those between the hub carrier and lower suspension arm Springs must be of the same type as the original coil leaf torsion bar etc and except as noted herein must use the original spring attachment points This permits multiple s
5. 50 8 mm above the driver s helmet in the normal seated position and a head restraint keeping the driver s head from going under or behind the roll bar is required 8 Five six or seven point driver restraint systems are required per Club Racing GCR Section 9 3 19 9 Vehicles shall have a Master Cutoff switch complying with Club Rac ing GCR Section 9 3 34 10 Aerodynamic devices may not have an overall width greater than 75 0 190 50 cm 11 No aerodynamic device may extend more than 66 0 167 64 cm above the ground 12 The total area of all wings shall not exceed 20 sq ft 129 03 cm computed as previously described in Section 18 0 Modified Catego ry Aerodynamics 13 Movable side skirts are allowed 18 5 FORMULA SAE FSAE A Vehicles constructed to any single year s Formula SAE rules 1985 on to include all FSAE safety items for that single year are eligible to run in SCCA Solo events The FSAE rulebook year shall be specified on the entry form and those rules shall be provided by the entrant for viewing B Non students may build own and compete in FSAE vehicles C In addition to FSAE safety rules SCCA safety rules per the applicable portions of Sections 3 3 and 18 4 A shall be met Passing vehicle inspec tion at a prior FSAE event is not required D Transponder and FSAE lettering shall not be required E These vehicles are assigned to Supplemental Class FSAE which may run as a subgroup of AM
6. Camaro Firebird amp Firehawk 1982 92 3rd gen Camaro Firebird SS Firehawk amp WS6 1993 2002 4th gen Camaro non ZL1 2010 13 Chevelle 1964 67 Chevelle 1968 72 Corvair Yenko Stage I II amp III all Lumina Monza V8 amp Skyhawk V6 Reatta Regal 1980 88 V6 amp V8 RWD Starfire amp Sunbird V6 all Trans Am Turbo 1982 92 Chrysler Plymouth amp Dodge Barracuda 1965 69 amp Dart Duster amp Valiant 1963 76 A body Barracuda amp Challenger E body 1970 74 Challenger 2008 13 Challenger 6 cyl amp V8 NOC Charger 2006 13 Conquest Turbo Laser Turbo all 1989 99 Stealth non turbo Dakota 1997 04 Ferrari 400 America all 500 Superfast all APPENDIX A STREET PREPARED Ford amp Mercury Cougar 1965 70 Cougar 1971 74 Mustang 196475 66 Mustang amp Cougar 1967 68 Mustang amp Cougar 1969 70 Mustang amp Cougar 1971 73 Mustang II all 1974 78 Mustang SVO Cobra Cobra R 1979 93 amp Capri 1979 86 4 cyl Turbo V6 amp V8 Mustang SN95 chassis NOC including Cobra amp Cobra R 1994 2004 Mustang S197 chassis incl Boss 302 amp Leguna Seca 2005 13 Mustang non GT350 2015 Taurus SHO Thunderbird amp Cougar 1983 88 Thunderbird amp Cougar 1989 97 Hyundai Genesis 2009 12 Infiniti G35 G37 M30 Q45 Jaguar Sedans 6 cyl amp 12 cyl XJS all XK 120 140 150 amp 160 Lexus ES 250 GS 40
7. Suzuki Samurai Scion xB 2004 06 Scion iQ THE FOLLOWING MAKE MODELS ARE NOT ELIGIBLE FOR THE STREET CATEGORY Audi R8 BMW 325 M Technic BMW M3 Lightweight Callaway Corvette Chevrolet Camaro SS and Pontiac Firebird WS6 Level 1 amp Level 2 suspension packages 4th gen 1993 2002 Ferrari 355 Ferrari 360 Ferrari NOC Ford GT Lamborghini NOC Lotus Elan M100 Lotus Elise SC 2008 11 Lotus Exige S amp S C 2006 11 Lotus Sport Elise 2006 MINI Cooper S JCW 2002 05 Mercedes Benz Black Edition all Nissan GT R 2012 15 Oldsmobile 442 HO W 41 Sports pack age option Pontiac Firebird Firehawk Porsche 911 GT2 2002 05 Porsche 911 Turbo AWD Porsche 911 Turbo S amp 3 6S 964 1992 94 Porsche 911 GT3 RS 997 2007 08 Porsche 911 Turbo 996 2001 05 Saleen SC Mustang APPENDIX A STREET SUPER STREET CLASS SS Alfa Romeo 4C 2015 Audi TT RS 2012 13 BMW Z8 Chevrolet Corvette Stingray C7 2014 15 Corvette Z06 2015 0E tires are NOT compliant Corvette ZR1 2009 13 Dodge Viper NOC Ford Mustang Cobra R 1993 1995 2000 Lotus Elise non SC 2005 11 Evora S 2011 15 Exige non supercharged 2006 Mercedes Benz AMG NOC Nissan GT R 2009 11 Porsche 911 991 non GT3 2012 15 911 997 chassis 2005 12 911 GT3 996 amp 997 non RS 911 Turbo 911 Turbo 930 1974 89 911 Turbo 964 non S non 3 6S 1989 94 Boxster S 2009 15 Boxster
8. e Noremoval of the interior sides of the pillars or tub to leave just an outer shell f Interior storage compartment doors luggage trunk compart ment panels parcel shelves may be modified or removed 138 2015 SCCA NATIONAL SoLo RULES 18 MobiFIED Wheel wells and bulkheads are open to modification as long as the driver is protected from fire and debris Floor pan width must match or exceed that between the insides of the original rockers Length must be matched between the original passenger compartment bulkhead locations Floor pan is defined in Section 12 7 Longitudinal structure such as rockers may not cover or overlap the floor pan width The full standard floor pan width or greater must be visible when viewed from directly above for at least the length of the door openings The floor pan may only be cut for drivetrain exhaust tire suspen sion clearance Tunnels and other vertical floor pan features as defined in Se tion 12 7 are included as part ofthe floor pan of a Stock Tub and shall be at least the original size They can be longer wider and taller No car of any sort with a floor pan less than 37 94 0 cm wide for front engine cars or less than 42 106 7 cm wide for mid and rear engine cars shall be allowed in DM or EM A Stock Tub car over 93 236 2 cm in wheelbase may change its wheelbase and remain a Stock Tub car if the stock rear bulkhead location and floor pan length are retained No weigh
9. removing fuses unplug ging yaw or steering angle sensors altering signals and may serve no other purpose Any codes or error lights resulting from ESC TC modifi cations are permitted 13 10 ENGINE AND DRIVE TRAIN A The engine air filter element may be removed or replaced provided the air flow path remains as originally designed i e no additional open ings No other components of the air induction system may be re moved replaced or modified B Engines may be rebored to the manufacturer s 1st standard overbore not to exceed 0 020 0 508 mm Sleeving is allowed to repair to the standard bore Only OE type standard or 1st overbore pistons of the same configuration and of the same or greater weights are permitted No interchange between cast and forged pistons is allowed C Any part of the exhaust system beyond downstream from the header manifold or catalytic converter if so equipped may be substituted or removed provided the system exits the car in the original location and meets the requirements of Section 3 3 3 B 16 Section 3 5 and Appendix I where applicable Vehicles equipped with exhausts that exit in mul tiple locations may change to a single outlet in any of the original loca tions Stainless steel heat exchangers are permitted only if the physical dimensions and configuration remain unchanged Modifications of any type including additions to or removal of the catalytic converters thermal reactors or any o
10. 240Z 260Z 280Z 280ZX non turbo Honda 2000 Mazda Miata non turbo 1994 2005 MX 5 Miata 2006 15 RX 7 GSL RX 7 GSL SE RX 7 GXL RX 7 GTU 1988 Nissan 370Z non NISMO 2009 15 Pontiac Fiero V6 Solstice non turbo Porsche 911 Carrera 3 2L 1984 89 911 SC 3 0L 1978 83 924 944 non turbo 968 Toyota MR2 Spyder MR2 Supercharged 1988 89 Saturn Sky non turbo 2Fastrack News February 2015 3Fastrack News March 2015 Fastrack News April 2015 2015 SCCA Nationa SoLo Rules 179 APPENDIX A STREET PREPARED STREET PREPARED CATEGORY Super STREET PREPARED SSP Chevrolet Corvette C5 chassis 1997 2004 Corvette C6 chassis 2005 13 Dodge Viper Elva Courier Ferrari 355 360 Dino 206 amp 246 all F430 all Ford GT Griffith all Lamborghini Gallardo all 2003 11 Lotus 7 amp 7A Elan RWD Elan M100 FWD all Europa all Elise Exige amp Exige S 2005 11 Elite 2 2 amp Elcat Esprit 4 cyl all Esprit V8 Evora amp Evora S 2010 14 Morgan V8 all Nissan GT R R35 Porsche 911 Turbo amp Turbo S AWD 2001 13 911 GT2 996 amp 997 chassis all 911 GT3 996 amp 997 chassis all Tesla Roadster 2008 12 TVR 4 cyl amp 6 cyl all V8 all Sports car over 2 0L not otherwise classified See Section 15 1 C for update back date limitations 2015 SCCA Nationat SoLo Rules 181 STREET PREPARED APPENDIX A A Street PR
11. All passenger seats may be removed or replaced with seats of any origin The driver s seat must remain on the standard side of the car and may not cross the centerline of the car The seat may be relocated fore aft by up to 12 0 30 5 cm based on the centerline of the original front and rear mounting points Rear bulkhead of the driver passenger compartment may not be removed to relocate the seat and the driver s seat may not extend rearward past the bulkhead J Doors may be lightened and may be replaced by ones of alternate ma terials Doors may be pinned but not bolted to prevent their opening in case of an accident Quick release fasteners e g Dzus fasteners are allowed Standard door hinges and latch mechanisms may be removed but the doors shall be capable of being opened or removed Interior door panels may be removed or replaced and the door window slots may be covered Alternate attachment devices may be added to hood and deck lid to supplement or replace the latches Hood and deck lid hinges may be removed K Windows 1 All windows may be replaced with polycarbonate material The front windshield shall have a minimum thickness of Y inch 0 125 3 16 mm Tinting of the upper portion of the front windshield and the entire portion of all other windows is allowed All window replace ments shall remain in the same position in the frame or opening as the original glass it replaces rubber molding is optional 116
12. B210 1171 1237 1288 1397 amp 1488 cc 1974 78 Alt cyl head P N 11041 H2300 11041 25720 11041 H1001 11041 18001 11041 H2303 11041 H5704 or 11041 H9204 Opel Ascona amp Ascona SportWagon 1900 cc 1971 75 GT 1900 GT 1100 Kadett 1100 amp 1900 cc 1964 72 Manta Sport Coupe amp Manta Rallye 1900 cc 1971 75 Pontiac Fiero 2 5L 4 cyl Alt suspension rear double A arm Air cleaner may protrude through engine hatch Solstice non turbo Porsche 356 except Carrera and 1500 1600 1300 912 amp 912E 1600 amp 1971 cc 914 4 cyl Cyl barrels of alt material allowed 924 1984 cc non turbo Alt cyl 933 104 302 50 Saturn Sky non turbo Sunbeam Alpine 2015 SCCA Nationat SoLo Rules 205 PrePARED DP APPENDIX A Toyota Celica non turbo 2WD 1970 77 Celica non turbo 2WD 1978 81 Celica non turbo 2WD 1982 85 Corolla non turbo 2WD 1968 70 Corolla 1588 cc 1971 74 Corolla non turbo 2WD 1971 74 Corolla non turbo 2WD 1975 79 Corolla non turbo 2WD 1980 83 MR2 1587 cc non supercharged 1985 89 MR2 2164 cc non turbo 1991 95 MR2 Spyder 1794 cc 2000 05 Starlet non turbo 2WD 1981 84 Alt engine 4A G 1 6L w cyl head 11101 16010 or 11101 16030 Triumph GT6 1998 cc Spitfire 1147 Spitfire 1296 MkIII Spitfire 1296 MkIV Spitfire 1493 TR 2 amp TR 3 TR 4 amp TR 4A beam axle TR 4A IRS TR 7 1998 cc Alt rear spoiler V 775 Turner 9
13. Champ 1971 78 Elva Courier 1600 1800 ATB 7224 MGA axle housing assembly Fiat amp Bertone 124 Spider 1600 2000 amp 124 Spider Abarth 1995 cc 124 Coupe amp Sedan 1966 74 124 Sport Coupe 1592 amp 1608 cc 131 amp Brava 1974 84 850 all incl Abarth X1 9 Ford amp Mercury Anglia Super 1962 67 Capri non US 1969 77 Alternate 2 3L SVO cyl head M 6049 A230 Cortina 1964 68 Escort Mexico Escort Super amp 1300 GT Mustang II 2 3L 1974 78 Alt 2 3L cyl head SVO M 6049 A230 Mustang amp Capri 4 cyl non turbo 1979 93 Alt 2 3L cyl head SVO M 6049 A230 Pinto 1971 80 Alt 2 3L cyl head SVO M 6049 A230 Alt body parts spoiler D9FZ6440555 A end piece D9FZ6428010 A or 2015 SCCA Nationat SoLo Rules 203 PrePARED DP APPENDIX A D9IFZ6428011 A Isuzu I Mark 1981 84 Impulse non turbo 1983 89 Jensen Jensen Healey 1973 cc Alternate Parts cast iron sleeves Lancia Scorpion 1756 cc 1976 Fabric roof panel may be replaced with alternate materials Lotus 7 amp 7A 948 997 amp 1098 cc Elan Alt cyl head 26RD0703 Super 7 1340 cc amp 1498 cc Europa Renault 1470 cc 1565 cc amp Lotus Ford Twin Cam 1558 cc Alt cyl head Renault casting R 16 Renault Alt cyl head Twin cam P N 26RD0703 Mazda 626 RWD Cosmo 1976 78 Alt cyl head E515 10 100B GLC RWD 1977 83 Alt cyl head E515 10 100B MX 5 Miata 1 6L amp 1 8L non turbo 1990 2005
14. Golf 1 8T Golf amp Jetta TDI 2007 15 Jetta 1 8T Passat 1 8T amp TDI Rabbit Golf GTI Cabrio 1974 92 Volvo 240 Turbo 1981 85 S40 non T5 V40 Sedans amp Coupes NOC non sports car based 4 seat minimum up to 3 1L normally aspirated Fastrack News February 2015 3Fastrack News March 2015 Fastrack News April 2015 2015 SCCA Nationat SoLo Rules 177 STREET TOURING APPENDIX A STREET TOURING XTREME STX Acura Integra Type R Audi A3 A4 TT quattro BMW 128i 2008 13 3 Series E30 chassis incl M3 3 Series E36 chassis non M 3 Series E46 chassis non M 3 Series E9x chassis non M non turbo 2006 13 M5 E39 1998 2003 Chevrolet amp GMC Cobalt 2 4L N A 2 0L S C amp 2 0L T S10 amp Sonoma 4 cyl amp 6 cyl N A Dodge Challenger V6 2008 15 Charger V6 2006 15 Dakota 4 cyl amp 6 cyl N A SRT 4 2003 05 Eagle Talon Turbo AWD Ford Fiesta ST Focus ST Ranger 4 cyl amp 6 cyl N A Honda Civic Si 2006 154 Infiniti G35 Sedan Lexus IS 250 IS 300 IS 350 Mazda MazdaSpeed3 MazdaSpeed6 MazdaSpeed Prot g RX 8 MINI Cooper S amp Cooper S JCW incl 2004 05 dealer installed 178 2015 SCCA NATIONAL SoLo RuLEs Mitsubishi Eclipse V6 2006 12 Eclipse Turbo AWD Nissan 240SX 300ZX non turbo 1984 96 Sentra SE R 2000 12 Sentra SE R Spec V Saab 9 3 non Viggen 1998 2012 Scion FR S Subaru BRZ Forester XT 2003
15. This does not permit any modifica tions to the frame or unibody beyond the allowed mounting holes H Longitudinal fore aft subframe connectors SFCs are permitted with the following restrictions 1 They must only connect previously unconnected boxed frame rails on unibody vehicles 2 Each SFC must attach at no more than 3 points on the unibody e g front rear and one point in between such as a seat mount brace or rocker box brace 3 SFCs must be bolted in place and not welded 4 No cutting of OE subframes or floorpan stampings is permitted Drill ing is permitted for mounting bolts only 5 No cross car lateral triangulated connections directly between the driver s side and passenger s side SFCs are permitted Connections to OE components such as tunnel braces or closure panels via bolts are allowed and count as the third point of attachment No alteration to the OE components is permitted 6 SFCs may not be used to attach other components including but not limited to torque arm front mounts or driveshaft loops and may serve no other purpose 14 3 TIRES Tires must meet the eligibility requirements of the Street category with the following additional restrictions Tires shall have a section width up to and including the following 82 2015 SCCA Nationa SoLo RULES 14 STREET TOURING STE STS STR AWD ursus Ada 225mm IIA Oc Dau DAE 245 mm STR 2WD STX 2WD STU 2WD 14 4 WHEELS Any w
16. charge air coolers CACs are unrestricted in size and con figuration Air to air CACs and radiators for air to liquid CACs must 2015 SCCA NATIONAL SoLo Rule 101 15 SrREET PREPARED be cooled only by the atmosphere except for standard parts Body panels fascias or structural members may not be cut or altered to facilitate CAC installation 4 Turbochargers and or superchargers forced induction may not be added changed or modified this does not allow ceramic coating of turbochargers On vehicles originally equipped with forced induc tion a No hardware changes or alterations to turbocharger s or supercharger s in size or number are permitted Turbochargers or superchargers may be updated backdated only in conjunction with the accompanying complete engine unit b No changes are allowed to waste gate s size number or loca tion No changes are allowed to variable geometry turbine VGT hardware C No changes are allowed to supercharger drive system pulleys Belt tensioners may be added changed to reduce belt slip d No changes are permitted to blow off pop off valves e Compressor bypass valves CBVs are considered part of the air intake system and may be added replaced or updated backdated independently of the other components of a forced induction sys tem f Boost regulation systems either electronic or mechanical and electronic fuel cuts referencing boost pressure may be altered or modified exce
17. meets Appendix C A Basic Design Considerations The total weight of components added must not be less than that of components re moved 2 Roll cages may be added It is strongly recommended that roll cages be constructed according to the Club Racing GCR though they must be bolted not welded into the automobile and be contained within the driver passenger compartment A roll cage has more than four attachment points to the body or frame or has bracing both fore and aft of the main hoop H Driver restraints as outlined in Section 3 3 1 are allowed Seats may not be cut to allow for the installation of alternate seat belts or harness es Passive restraint systems may disabled but may not be removed Removeable seat headrests may be repositioned using the original mounting hardware only if the OE components permit it with no modi fications This includes removing a headrest and reinstalling it back wards A horizontal harness bar may be used as part of the instal lation hardware for allowed driver restraints provided it has no more than 2 attachment points to the chassis and is bolted at those locations A C type harness bar may also be used It may have 4 bolted attachment points to the chassis 2 primary and 2 supporting connections to resist rotation Truss type harness bars are not allowed L Cars may add one rear trailer hitch The resulting weight addition is allowed The hitch may serve no other purpose Factory tie downs and co
18. weight Ibs 1850 Corvair Corvair Turbo 1965 69 sss weight Ibs 1850 Monza 1975 80 Chrysler Dodge amp Plymouth 300 all 2006 14 A body Valiant Dart Duster Demon etc 1963 67 amp Barracuda 1965 69 Dakota 2WD 1987 96 Dakota 2WD 1997 2004 Challenger 2008 14 Charger 2006 14 E body Barracuda amp Challenger 1970 74 Fastrack News April 2015 200 2015 SCCA Nationat SoLo RULES APPENDIX A CP PREPARED Ford amp Mercury Maverick amp Comet 6 cyl amp 8cyl 1970 77 Mustang 6 cyl amp 8 cyl 1964 69 Mustang 6 cyl amp 8 cyl 1969 73 Mustang II 6 cyl amp 8 cyl 1974 78 Mustang 6 cyl amp 8 cyl 1979 93 Mustang Turbo amp SVO 4 cyl 1979 93 Mustang w o IRS 1994 04 Air may be ducted to the intake airbox through an opening in the back of the hood rectangular in shape maximum width of 20 maximum length 3 5 Opening may extend 1 into the windshield Mustang S197 chassis non supercharged 2005 14 Thunderbird V6 amp TurboCoupe 1983 88 Thunderbird V6 amp SuperCoupe 1989 97 General Motors Chevelle El Camino Tempest etc A body 1964 67 Chevelle Cutlass El Camino GTO etc A body 1968 72 LeMans Cutlass Chevelle El Camino etc A Body 1973 77 Malibu Cutlass El Camino etc A body 1978 81 Monte Carlo Grand Prix Regal El Camino etc A body 1982 88 10 15 amp Sonoma 6 cyl 1982 93 10 amp Sonoma
19. 08 Impreza WRX non STI 2002 08 2015 Legacy GT 2005 08 Toyota Supra non turbo 1993 98 Tacoma 1995 2015 Volkswagen Beetle 2 0T Corrado all Golf 2 0T Golf R 2 0T GTI 2 0T Jetta 2 0T Passat 2 0T VR6 amp W8 R32 Volvo 240 Turbo 1981 85 C30 Sedans amp Coupes NOC non sports car based 4 seat minimum 3 1L to 5 1L normally aspirated or up to 2 0L forced induction Fastrack News February 2015 3Fastrack News March 2015 Fastrack News April 2015 STREET TouRING ULTRA STU Audi S4 S5 TTS quattro 2008 15 BMW 135i 3 Series E9x chassis NOC incl M3 2006 13 M3 E36 non LTW 1995 99 M3 E46 2000 05 Chevrolet Camaro N A Corvette C5 non Z06 1997 2004 Dodge Challenger V8 N A 2008 15 Charger V8 N A 2006 15 Ford Mustang N A Mustang EcoBoost 2015 Hyundai Genesis 2 0L Turbo 4 cyl 2010 13 Genesis V6 Infiniti G35 Coupe G37 Lexus ISF Mercedes Benz CLK430 1999 2003 CLK55 2001 06 Mitsubishi Lancer Evolution Lancer Ralliart 2008 10 Nissan 300ZX 1984 89 350Z non NISMO Pontiac GTO Firebird N A Subaru Impreza WRX STI Impreza WRX 2009 4514 Volvo S60R Sedans amp Coupes NOC non sports car based 4 seat minimum over 5 1L normally aspirated or 2 0L to 3 1L forced induction APPENDIX A STREET TOURING STREET TOURING ROADSTER STR BMW M Roadster amp M Coupe 1998 2002 Z3 6 cyl Z4 non turbo non M Datsun
20. 1 PROSOLOG EVENTS mamana Aaah rere trea 159 20 2 OVERVIEW EE 159 20 3 PROGRAM OBJECTIVE AND STRATEGIES 159 20 4 OPERATIONAL AUTHORITY AND RULES INTERPRETATION 159 APPENDIX A AUTOMOBILE CLASSES eese 161 STREET CATEGORY ei etai petet niki 163 A Street class AS Laan 164 B Street class BS aaa Ka t eed nr tee ec e e Evae 164 C otreeb lass CS EE 165 E Street class ES cuye ae aaa aa aa en e 167 F Street class FS s docete itera NAAN 167 G Street class GS cnet ode cente veg kid teeter s wan k 169 Le Ee E a EE 170 Super Street R class SOR aec eet tates hence han 175 STREET TOURING CATEGORY mee 176 Street Touring FWD GIEL 176 Street Touring Sport S TS einer aan 177 Street Touring amp Xtreme GT 178 Street Touring Ultra STU coin icon 179 Street Touring amp Roadster GT 179 STREET PREPARED CATEGORY mma NAGA 181 Super Street Prepared GP 181 A Street Prepared ASP aaa naaa 182 B Street Prepared BSP entere 183 Street Prepared CSP mms lei 184 D Street Prepared DSP eene tias 185 E Street Prepared ESP aaa nasad se ERA Ee anced 187 F Street Prepared ESP aaa AA rettet esiran ER criado 188 STREET MODIFIED CATEGORY A 193 Street Modified Class SM cista aaa 193 Super Street Modified Class SSM sene 194 Street Modified Class Front Wheel Drive SMF
21. 15 24 cm for ward of front bodywork fascia as viewed from above No portion ofthe 2015 SCCA NarionaL SoLo Rules 195 PREPARED XP APPENDIX A 2 Ww al Ch canard may extend past the widest part of the front bodywork fascia as viewed from above Canard area will be measured in the same man ner as wings using Section 12 10 Canard area may not exceed 1 2 sq ft 1114 8 cm Canard endplate surface area is limited to 100 sq in 645 2 cm each and the number of endplates is limited to a maximum of 2 Front splitters are allowed and shall be installed parallel to the ground within 3 fore and aft and may extend a maximum of 6 15 24 cm forward of the frond bodywork fascia as viewed from above Splitters may not extend rearward past the centerline of the front wheels No portion of the splitter may extend beyond the widest part of the front bumper as viewed from above d Steering wheel pedals and driver s seat must be completely to the left or right of vehicle centerline e Exhaust may exit through the bodywork Rocker panels may be modified for exhaust routing The transmission tunnel cover may be altered to allow the installation of an alternate transmission and or driveshaft Cars originally equipped with a removable transmission tunnel cover may substitute a tunnel cover of an alternate material g The shift lever opening in the body of the car may be altered to allow the installation of alternat
22. 2003 04 Mustang EcoBoost 2015 Mustang GT 2010 15 Mustang Mach 1 2003 04 Mustang Shelby GT T82 amp 54U factory option package only 2007 08 Mustang SVT Cobra Mustang V6 2011 15 Mustang V8 NOC Thunderbird V8 amp V6 Super charged GMC Syclone Typhoon Hyundai Genesis Coupe 4 cyl Turbo 2013 Genesis Coupe V6 2010 15 Infiniti G35 Coupe amp Sedan G37 Coupe amp Sedan Q45 Jaguar X Type 3 0L 2002 08 XJ 1998 2015 XJ S 1976 96 XK8 1997 2006 S Type 6 cyl S Type R Sedan 12 cyl Lexus IS 250 2006 15 IS 300 IS 350 2006 15 ISF 2008 14 GS 400 1998 2000 Lincoln LS V8 2000 06 Mark VIII 1993 98 168 2015 SCCA NATIONAL SoLo RULES Mercedes Benz C280 2001 07 C300 2007 15 C320 2001 05 C350 2007 15 C36 AMG C63 AMG non Black Series 2008 15 CLK E55 AMG Mercury Capri V8 Cougar V8 amp V6 Supercharged Mitsubishi 3000 GT Turbo Nissan 300ZX non turbo 1990 96 300ZX Turbo 1984 9889 Pontiac Firebird V8 NOC Firebird Trans Am amp Formula WS6 base car only including GM installed 1LE 1998 2002 G8 V8 amp NOC 2008 09 GTO 2004 06 Trans Am Turbo V6 Porsche Panamera 2010 15 Shelby GT350 1965 70 GT500 1967 70 Tesla Motors Model S 2012 14 Toyota Supra non turbo 1993 98 Supra Turbo 1987 92 Triumph Stag V8 sedans pick ups and sedan derived convertibles NOC 3Fastra
23. 2015 SCCA Nationa SoLo RULES M 17 PREPARED 2 All window channels and window winding mechanisms may be re moved 3 Closed cars All side window glass may be removed All rear hatch backs and deck lids shall be completely closed poor alignment of bodywork or any other means to prevent complete closure is not permitted 4 Open cars All windows and windshields including windshield frames may be removed The resulting window slots may be cov ered 5 The installation of windshield safety clips rear window safety straps and windshield safety straps is permitted The contour of the fender may be altered flared for tire clearance provided the modifications do not confuse the identity of the car Only standard production ventilation openings on the specific recognized model are permitted Tires may extend beyond the bodywork Fender wheel openings may be trimmed to provide tire clearance throughout the full range of suspension travel but no more than is necessary for this purpose Inner fender panels separating the wheel wells from the engine com partment may be altered replaced or removed Rear inner fender panels may be altered replaced or removed provided there are pan els providing total separation between driver passenger compartment and wheels A shock strut tower integral to the inner fender panel is considered part of the inner fender panel and is included in this allow ance This does not allow modificati
24. 7 Turbo 1987 91 RX 8 Mercedes Benz SLK Nissan 300ZX Turbo 1990 96 350Z non NISMO 2003 09 Porsche 356 Carrera 4 cam 911 non turbo NOC 911 Club Sport 914 all 928 all 944 16v 944 Turbo all Carrera 2 amp Carrera 4 964 1989 94 Scion FR S non RS 1 0 2015 SCCA NarionaL SoLo Rules 165 STREET APPENDIX A CS coNTINUED Subaru BRZ Toyota MR2 Turbo 166 2015 SCCA Nationat SoLo RULES D Street cLass DS Acura Integra Type R Audi A3 quattro 3 2L V6 AWD 2006 09 A5 2008 15 4 2000 03 TT 1 8T non quattro FWD 2000 06 TT 2 0T non quattro FWD 2008 09 TT quattro AWD 2000 06 Chevrolet Cobalt SS 2 0L Turbo 2008 10 Eagle Talon Turbo AWD Lexus SC 400 1992 2000 Mazda Mazdaspeed6 MINI Clubman JCW 2009 14 Clubman S 2008 14 Cooper Coupe JCW 2013 15 Cooper Coupe S 2013 15 Cooper JCW 2006 15 Cooper Roadster JCW 2012 15 Cooper Roadster S 2012 15 Cooper S 2002 15 Mitsubishi Eclipse Turbo AWD Lancer Ralliart 2009 15 Saab 9 2X Aero 2 0L Turbo 2005 06 Subaru Forester 2 5XT 2004 13 Legacy 2 5GT 2005 12 Impreza WRX non STI 2001 15 Volkswagen Golf R 2012 13 R32 Golf chassis 2004 2008 E STREET CLASS ES Alfa Romeo 2000 Spider 2000 GTV BMW 23 4 cyl 1996 98 Datsun 2000 240Z 280ZX non turbo Dodge Charger Turbo GLH Turbo Fiat amp Bertone X1 9 Mazda Mazdaspeed Miata 2004 05 Miata 1
25. 8 mm wide or inch 0 875 x 0 065 22 23 mm x 1 65 mm welded steel tubing securely mounted and located so as to support and con tain the driveshaft in event of U joint failure Vehicles that have a closed tunnel or other such structure which the driveshaft pass es through such as the vehicle s frame may be considered for an exemption from the SEB if that structure meets the criteria stated above NoTE DM and EM vehicles are exempt from the scattershield drive shaft hoop and Master Switch requirements if they are using DOT approved tires Theroll bar structure must meet the requirements of either Appen dix C or the Club Racing GCR required by class rules Roll cages are strongly recommended Specials are required to have the roll bar extend at least 2 50 8 mm above the driver s helmet in the normal seated position and a head restraint keeping the driver s head from going under or behind the roll bar It is strongly recommended that all cars adhere to this specification Firewalls and floors shall prevent the passage of flame and debris to the driver s compartment For cars having fluid lines in a non standard routing over the belly pan the belly pan shall have drain holes to prevent the accumulation of fluids Ballast may be added to obtain minimum weight requirements However it must be attached and secured in a safe manner Club Racing GCR specific items and or equipment not required in Modified Catego
26. 99 non turbo Lancer non turbo Mirage 1997 2002 non turbo Tredia non turbo Morgan 4 2138 cc all Nissan amp Datsun 1200 200SX 1976 79 200SX 1980 83 200SX 1984 88 200SX SE R 210 310 510 1968 73 510 1978 81 NX1600 190 2015 SCCA NATIONAL SoLo RuLEs NX2000 Pulsar Sentra amp Sentra SE R 1991 94 Pulsar amp Pulsar NX non turbo all Sentra 1 8L 2000 06 Sentra 2 0L 1995 99 Stanza all Opel 1900 amp Manta GT 1100 GT 1500 amp 1900 Kadett 1100 Kadett 1500 amp 1900 Pontiac amp Toyota Corolla Matrix amp Vibe 2003 08 NOC Peugeot 405 DL amp 405 S Porsche 912 912E 924 Audi engine Renault 15 17 all 16 all 17 Gordini 18i all Alliance GTA amp Encore Fuego non turbo R 5 NOC amp LeCar Saab Sonnet 1968 74 Saturn SL 1991 95 SW 1993 95 amp SC 1991 96 SL 1996 99 SW 1996 99 amp SC 1997 2000 SL 2000 02 SW 2000 02 amp SC 2001 02 Scion tC Sunbeam Alpine all Subaru Turbo 4WD all NOC Forester non turbo Impreza 2 0i 2012 13 FSP coNTINUED Legacy amp Legacy GT Suzuki Aerio Toyota Camry 4 cyl Celica 1970 77 Celica 1978 81 Celica 1982 85 Celica FWD 1986 89 Celica FWD 1990 93 Celica 1994 99 Corolla 1200 Corolla 1600 amp SR 5 1970 79 Corolla 1600 amp 1800 RWD 1980 83 Corolla AE86 chassis all 1984 87 Corolla FX16 Corolla GTS AE92 c
27. A not required d A device for locking out reverse gear may be used e A limited slip differential LSD is permitted 4 BODYWORK Bodywork to the rear of the main roll hoop may be removed 5 FRONT SUSPENSION The front suspension shall be standard VW Type 1 sedan H beam front suspension i e link pin or ball joint or an exact replica of one ofthem and dimensionally identical Aluminum H beams are prohib ited The following modifications are permitted a Lugs welded brackets attached by welding or otherwise and holes drilled in the H beam to permit attachment of the beam to the chassis and components wholly or partially to the beam Brackets may be welded to the torsion arms for the sole purpose of actuating the shock s and or external mounted anti roll bar and shall perform no other functions b Open springs Torsion bars may be used in conjunction with coils or may be removed entirely Coil overs are permitted c Removal of the shock towers above the upper H beam tube cen terline d Relocation of the shock dampers Shock dampers and their actua tion are free e The use of any anti roll bar or bars internal or external mounting hardware and trailing arm locating spacers The anti roll bar fit ted as part of the standard suspension may be removed Anti roll bars may not be cockpit adjustable f Replacement of torsion bar rubbers with spacers of another mate rial g Installation of any ride height adjuster
28. Any resulting change to the position of the strut centerline is allowed Such brackets shall serve no other purpose This does notallow for changes to the integral steering arm on cars that have the steering arm integrated with the strut body K Changes in alignment parameters which result directly from the use of allowed components are permitted For example the dimensional changes resulting from the use of a cylindrical offset bushing which meets the restrictions of Section 15 8 C are allowed including those re sulting from a change in the pivoting action to a about the mounting bolt or b about the bushing itself Eccentric bolts are permitted for suspension adjustment only if they are as specified by the factory per the last paragraph of Section 13 8 15 9 ELECTRICAL SYSTEM Except for those with electric and hybrid powertrains vehicles may only exceed the allowances of Section 13 9 as specified herein A Any ignition setting adjustment or system may be used subject to the requirements of Section 15 10 D This does not prohibit the use of two step rev limiters used when the car is stationary B The make model number and size of the battery may be changed but not its voltage C Relocation of the battery or batteries is permitted but not into the pas senger compartment If the battery is relocated and the original battery tray can be removed by simply unbolting it the tray may be removed or relocated with the batter
29. B 7 minimum track requirements apply Minimum weight will be 11096 of the Solo 9 minimum weight from Ap pendix A plus any Solo weight additions wheel size weight increases etc Vehicles taking advantage of this allowance may use the Solo Rules or the Club 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 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 fol lowing items listed in the GCR while recommended are not required Logbooks annual inspections roll cage on board fire systems hand held fire extinguisher scattershield chain guards master switch steer ing wheel lock removal window safety net windshield safety clips and rear window safety straps and braided steel brake lines Single Inlet Restrictors SIRs are 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 cor responding original model provided that the engine track and wheel baseremain within the allowed spe
30. Cadillac ATS 3 6L V6 Chevrolet Corvette C4 all 1984 96 Corvette C5 non Z06 1997 2004 DeTomaso Pantera Mangusta Honda 2000 non CR Jaguar XKR Coupe Maserati Coupe 2002 07 GranSport 2004 07 Spyder 2002 07 Mazda MX 5 Miata MS R 2007 Miata Club Sport 2003 Mercedes Benz C32 AMG 2002 04 CLK55 AMG 2001 06 SLK32 AMG 2002 04 SLK350 2005 15 SLK55 AMG 2005 10 Mitsubishi Lancer Evolution 2003 14 3Fastrack News March 2015 BS CONTINUED Nissan 370Z non NISMO 2009 15 Pontiac Solstice non turbo 2007 10 Porsche 911 993 non turbo 1995 98 968 Boxster 986 amp 987 non S 1997 2008 Boxster S 986 chassis 2000 04 Cayman non S 2005 08 Macan S amp Turbo 2015 Saleen Mustang non supercharged Saturn Sky non turbo 2007 10 Scion FR S Release Series 1 0 Shelby Cobra Subaru Impreza WRX STI incl Special Edition 2004 15 Toyota Supra Turbo 199315 98 TVR 8 cyl V6 V8 V12 Fastrack News January 2015 Fastrack News February 2015 APPENDIX A STREET C STREET CLASS CS BMW M Coupe amp M Roadster 1996 2000 M3 E30 amp E36 1988 91 1995 99 23 6 cyl non M 1997 2002 Chevrolet Corvette 1963 82 Chrysler amp Plymouth Prowler Ferrari 308 amp 328 Jaguar XKE Jensen Jensen Healey Lotus 7 amp 7A Eclat Elan RWD all Elite all Esprit non turbo Europa Maserati BiTurbo Mazda MX 5 Miata non MS R 2007 2006 15 RX
31. Civic all 2001 05 CR Z Fit Insight Hyundai Veloster non turbo 2011 15 Kia Forte Forte Koup Lexus CT200H 2011 15 Mazda Mazda2 Mazda3 Mazda6 MINI Cooper non S Mitsubishi Lancer non turbo Saturn Astra Scion iQ CVT tC xA 176 2015 SCCA NATIONAL SoLo RULES STREET TOURING SPORT STS Acura Integra 1986 2001 Audi A4 1 8T TT Coupe amp Roadster FWD BMW 23 4 cyl Chevrolet Sonic Turbo 2012 15 Spark Sprint 1985 88 Chrysler Plymouth Dodge Neon all 1995 2000 Neon R T amp ACR 2001 04 Fiat 500 Abarth 500 Turbo 2013 15 Ford Escort GT 1991 96 Fiesta 1 0L Ecoboost ZX2 amp Excort ZX2 1998 2003 Honda Accord 1994 97 Accord 6 cyl 1998 2013 Civic 1984 2000 CRX del Sol amp Civic del Sol Hyundai Accent 2012 15 Tiburon V6 2003 08 Kia Rio 2012 15 Lexus SC300 Mazda 323 323 GT amp 323 GTX Miata non Torsen differential 1990 97 Protege NOC 1999 2003 Protege MP3 RX 7 non turbo NOC Nissan 200SX SE R 1995 98 Sentra 1 6L 1 8L 2 0L 1991 2012 NX2000 1991 94 APPENDIX A STREET TOURING Pontiac Fiero 4 cyl Porsche 914 4 cyl Saturn Subaru Impreza 1 8L FWD 1993 96 Impreza 2 5 RS 1998 2001 Legacy 1990 94 Toyota Celica non turbo 1986 2005 Corolla 1984 91 MR2 non supercharged 1985 89 MR2 non turbo 1991 95 Volkswagen Beetle 1 8T amp TDI
32. Cordia non turbo FWD 1982 90 Alt Spec No split shift Eclipse see Chrysler Mirage see Chrysler Nissan Datsun NX B13 chassis 1991 93 Pulsar N12 chassis 1983 86 Alt cyl head P N 11041 15M00 Pulsar N13 chassis 16v 1987 90 Alt cyl head P N 11041 15M00 Alt engine A14 Sentra B11 chassis 1983 86 Alt cyl head P N 11041 15M00 2015 SCCA Nationat SoLo Rules 209 PREPARED EP APPENDIX A Sentra B12 chassis 1 6 L 1987 90 Alt cyl head P N 11041 15M00 Alt engine L16 Sentra B13 chassis 2 0 L 1991 94 Alt cyl head P N 11041 H5704 Sentra amp 200SX B14 chassis 1995 99 Versa 2010 15 Sedans N A FWD NOC Peugeot 405 non turbo 1987 91 Renault Alliance Encore R 9 amp R 11 1982 89 Alt cyl head 1477005972627 LeCar amp R 5 non turbo FWD 1978 96 Alt cyl head 7700597627 firewall modifications when using alt head R17 Gordini 1971 77 Sedans FWD NOC Saab 93 amp 96 Sedan 843 cc 2 stroke 96 non turbo FWD 1960 80 99 non turbo FWD 1969 84 900 non turbo FWD 1979 94 Sonett 1498 amp 1699 cc Sedans non turbo FWD NOC Saturn S amp L series 1991 2005 ION non supercharged 2003 07 Subaru GL Coupe non turbo FWD Sedans non turbo FWD NOC Suzuki Swift GA GL GTi amp GT 1985 2001 Toyota Celica non turbo 2WD 1986 89 Celica non turbo 2WD 1990 93 Celica non turbo 2WD 1994 99 Celica non turbo 2WD 200
33. D Original equipment ABS braking systems may be electrically disabled but may not be removed or altered in any other way 14 7 ANTI ROLL SWAY BARS Substitution addition or removal of any anti roll bar s is permitted Bushing material method of attachment and locating points are unre stricted This does not authorize the cutting of holes to route the bar s or links Components such as anti roll bars and strut housings that serve dual purposes by also functioning as suspension locators may not be modified in ways that change the suspension geometry or steering geometry Non standard lateral members which connect between the brackets for the bar including allowed strut bars per Section 14 2 G are permitted 14 8 SUSPENSION A Ride height may only be altered by suspension adjustments the use of spacing blocks leaf spring shackles torsion bar levers or change or modification of springs or coil spring perches This does not allow the use of spacers that alter suspension geometry such as those between the hub carrier and lower suspension arm Springs must be of the same type as the original e g coil leaf torsion bar bellows and except as noted herein must use the original spring attachment points This per mits multiple springs as long as they use the original mount locations Coil spring perches originally attached to struts or shock absorber bod ies may be changed or altered and their position may be adjustable Spacers a
34. Ladies the class will be eliminated the following year Audi TT RS 2012 13 Chevrolet Corvette Stingray C7 2014 Corvette C6 chassis non ZR1 2005 13 Corvette Z06 C5 chassis 2001 04 Dodge Viper non ACR 2008 10 Viper GTS 1996 2005 Viper R T 1992 2003 Viper SRT 10 2003 07 Lotus Elise non SC 2005 11 see Appendix F Evora S 2011 14 Exige non supercharged 2006 Mercedes Benz AMG NOC Porsche 911 991 non GT3 2012 14 911 997 chassis 911 GT3 997 chassis non RS 911 GT3 996 chassis 911 Turbo 930 1974 89 Boxster S 2009 14 Boxster Spyder 2011 12 Cayman R 2012 Cayman S 2009 14 Tesla Motors Roadster all 2008 13 Fastrack News February 2015 3Fastrack News March 2015 2015 SCCA NarionaL SoLo Rules 175 STREET TOURING APPENDIX A STREET TOURING CATEGORY STREET TouRING FWD STF Acura xB RSX Subaru TSX Impreza 2 0i 2012 15 Chevrolet Toyota Cobalt 2 2L N A Corolla 2003 15 Cruze 2008 15 Echo 2000 05 Sonic non turbo 2012 15 Matrix 2003 13 Volt 2011 15 Yaris Chrysler Plymouth Dodge Volkswagen Neon NOC 2001 04 Golf 2 5L _ Fiat Golf amp Cabrio 2 0L 8v 1998 500 non turbo 2012 15 2006 Ford Golf amp Jetta TDI 1999 2006 Fiesta N A 2011 15 Beetle 2 0L 8v 1998 2005 Focus non ST Beetle 2 5L 5 cyl Honda Jetta 2 0L 8v 2000 04 Accord 4 cyl 1998 2015 Jetta 2 5L 5 cyl Civic non Si 2006 15
35. Lynx amp LN7 1982 88 Escort amp Lynx 1968 81 Escort GT amp ZX 2 1991 96 Escort GT 1981 90 Festiva 1984 97 Fiesta 1976 83 Focus 1998 2010 Probe non turbo 1989 92 Probe non turbo 1993 97 Honda Accord 4 cyl Alt cyl head 12100 P05 010 or 12100 P05 020 Civic 1170 cc Civic 1237 cc Civic 1488 cc 1980 83 Alt cyl head 12100 664 010 2v per cyl Civic 1984 87 Alt cyl head 1342 cc 12100 PE2 000 121000 PE7 000 or 12100 PE3 000 1488 cc 12100 PE3 010 or 121 XA1 0084 Civic 1988 91 Civic 1992 95 Civic non Si 1996 2000 Civic Si 1 6L DOHC VTEC 1999 2000 Civic 2001 05 Civic 2006 10 CRX 1984 87 Alt cyl head 1342 cc 12100 PE2 000 121000 PE7 000 or 12100 208 2015 SCCA Nationat SoLo RULES APPENDIX A EP PREPARED PE3 000 1488 cc 12100 PE3 010 or 121 XA1 0084 Alt body parts Mugen front bumper spoiler front fender rear fender 8 rear bumper CRX 1988 91 DelSol 1993 96 Fit 2009 15 Prelude 1978 2001 Alt cyl head 12100 PC7 000 12100 PC7 010 or 12100 PC7 020 Hyundai Sonata 1989 2005 Infiniti 130 1996 2001 135 2002 04 Isuzu I Mark 1985 89 Impulse non turbo 1990 92 Stylus 1991 93 Sport Coupe Lancia Beta Zagato Mazda 323 amp GLC non turbo FWD 1980 95 626 non turbo 2WD 1982 2002 Mazda2 2011 15 MX 6 non turbo 2WD 1988 97 Sedans N A FWD NOC MINI Cooper non S 2002 10 Mitsubishi
36. MX 5 2006 10 Mercedes 190E 1983 93 Morgan 4 4 MkIV 2138 cc Replace wood floorboards with metal 4 4 MkV 2138 cc Replace wood floorboards with metal Nissan amp Datsun 200SX S10 chassis 1977 79 Alt cyl head P N 11041 22010 11041 U0600 A 11041 U0602 SV 11041 21901 or 11041 N7120 200SX S110 chassis 1980 83 Alt cyl head 11041 22010 11041 U0600 A 11041 U0602 SV 1041 21901 or 11041 N7120 Alt engine L20B or NAPS Z 200SX S12 chassis 1984 88 Alt cyl head P N 11041 N7120 Engine L20B or NAPS Z 210 1397 amp 1488 cc 1979 82 210 B310 chassis 1 4 L 1978 82 Alt cyl head 11041 H2303 or 11041 H5704 204 2015 SCCA Nationat SoLo RULES APPENDIX A DP PREPARED 2405X 1989 98 Alt engine L20B with cyl head P N 11041 N7120 22010 or 11041 V9182 U0600A Hood may be modified for engine clearance 510 PL510 1595 cc 510 PL510 chassis 1 6 L 1 8 L amp 2 0 L 1968 73 Alt cyl head P N 11041 22010 11041 U0600 A 11041 U0602 SV 11041 21901 or 11041 N7120 510 A10 chassis 1979 81 Alt cyl head P N 11041 22010 11041 U0600 A 11041 U0602 SV 11041 21901 or 11041 N7120 610 1973 76 Alt cyl head P N 11041 22010 11041 U0600 A 11041 U0602 SV 11041 21901 or 11041 N7120 710 1974 77 Alt cyl head P N 11041 22010 11041 U0600 A 11041 U0602 SV 11041 21901 or 11041 N7120 720 2WD 1980 86 810 1976 80 810 Maxima 1981 83 B110 1171 1237 1288 1397 amp 1488 cc 1970 73
37. Spyder 2011 13 Cayman R 2012 Cayman S 2009 15 SRT Viper 2013 15 Tesla Motors Roadster all 2008 13 Fastrack News January 2015 Fastrack News April 2015 2015 SCCA NarionaL SoLo Rules 163 STREET APPENDIX A A STREET CLASS AS Acura NSX Alex Zanardi Signature Edition Cadillac XLR Chevrolet Camaro Z28 2014 15 Camaro ZL1 2012 15 Corvette C6 non ZR1 2005 13 Corvette Z06 C5 2001 04 Dodge Viper non ACR 2008 10 Viper GTS 1996 2005 Viper R T 1992 2003 Viper SRT 10 2003 07 Ford Mustang Boss 302 Laguna Seca 2012 13 Mustang Shelby GT500 2007 14 Honda 2000 CR Jaguar F Type except Project 7 2014 15 Lotus Esprit Turbo 1996 2004 Evora non supercharged 2010 15 Mazda RX 7 1993 95 Morgan Plus 8 Roadster V6 Nissan 350Z NISMO 2004 2008 370Z NISMO 2009 15 Pontiac Solstice GXP Turbo 2007 09 Porsche 911 996 non turbo 1998 2005 Boxster S 2005 08 Boxster non S non Spyder 2009 15 Cayman non R non S 2009 15 Cayman S 2006 08 Saturn Sky Redline Turbo 2007 10 164 2015 SCCA NATIONAL SoLo RuLEs B Street cass BS Acura NSX non Zanardi Edition Audi RS 4 2007 08 RS 5 2013 15 RS 6 C5 chassis 2003 04 S3 4 2010 15 5 2008 15 TT quattro AWD 2008 15 TTS 2009 15 BMW 1 Series M Coupe 2011 12 M Coupe amp Roadster 2001 02 M5 2004 10 Z4 Coupe incl M 2006 08 amp Roadster incl M 2002 15
38. The minimum track for alf prepare Cars 1s the OE track dimension NoTE This minimum also applies to cars utilizing Section 17 11 A to compete in Prepared LEVEL 1 PREPARATION FULL PREP VEHICLES a Suspension pick up points on the chassis or structure may be re located If such points are relocated there shall be a metal panel covering or bulkhead separating the driver passenger area from the suspension components b Front Vehicles originally equipped with MacPherson strut front suspension may convert to double A arm Other vehicles must re tain the manufacturer s system of front suspension A arm front suspension shall have the shocks attached outboard of the inner pickup point on the upper or lower control arm Rocker arms push pull rods etc are prohibited unless otherwise stated in Ap pendix A c Rear Rocker arms and push pull rods may be used to augment the rear suspension members LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Suspension pick up points on the chassis or subframe structure may not be relocated Allowed alternate bushings bearings must contain the pivot point within the space occupied by the OE bush ing b Vehicles equipped with MacPherson Chapman struts may slot the mounting holes or add additional adjustment plates provided that the center hole is not enlarged or relocated The strut shaft must pass through the center hole Mounting of adjustment plates is unrestricted c Camber and
39. addition of weight adjustments defined herein and in Section 17 Acura Integra 1986 89 Integra 1990 93 Alt engine 1590 cc Integra 1994 2001 RSX 2002 06 Sedans N A FWD NOC Audi 4000S non turbo FWD 1980 87 Sedans N A FWD NOC Austin amp Morris America 1968 71 Mini Cooper S 1275 Alt engines 850 970 997 998 1071 or 1098 cc Firewall modification for adjustable front track rod front lower sus pension arm Chevrolet Pontiac Buick Oldsmobile amp Cadillac Equivalents Beretta 4 cyl amp V6 1987 96 Chevette 1976 87 Citation 1980 85 Nova FWD Sonic non turbo 2012 13 Spectrum 1985 88 Sprint non turbo 1985 91 Fastrack News April 2015 2015 SCCA Nationa SoLo Rules 207 PREPARED EP APPENDIX A Chrysler Plymouth Dodge Eagle amp Mitsubishi Colt amp Champ non turbo 1979 83 Colt amp Mirage non turbo 1984 88 Colt Mirage amp Summit non turbo 1989 92 Colt amp Mirage non turbo 1993 96 Daytona amp Laser 2 2 L non turbo 1984 90 Eclipse Laser amp Talon 16v amp 8v non turbo FWD 1982 90 Neon Neon non turbo 1995 2005 Omni Horizon 024 amp TC3 1978 90 Shadow amp Sundance 2 2 L 1986 94 Shelby Charger pre 1979 Shelby Charger 1983 87 Spirit amp Acclaim 4 cyl 1989 95 Sedans N A FWD NOC Fiat 128 Coupe SL amp 3P 1290 cc 1969 79 500 2011 15 Ford amp Mercury Escort 1997 2002 Escort EXP
40. are the same as Section 13 Street Category with the following exceptions 1 TIRES Sections 13 3 A 1 minimum UTQG treadwear grade 13 3 A 2 minimum molded tread depth and 13 3 A 5 tires must be designed for highway use does not apply DOT competition DOT R R comps etc tires are eligible Section 13 3 C 4 the tire exclusion list is replaced with the follow ing list which may be altered at any time by the SEB upon notifi cation of the membership Kumho Ecsta W710 2 WHEELS REPLACING SEcTION 13 4 Any type wheel may be used provided it is the same width and diameter as standard and as installed doe not have an offset more than V4 from the standard wheel for the car The resultant change in track dimensions is allowed Wheel spacers are permitted provided the resultant combination complies with the offset requirements of this Sec tion On vehicles supplied with an OE wheel spacer the wheel spacer shall be considered as a part of the wheel Wheel studs lug nuts valve stems linclud ing pressure relief types and or bolt length may be changed tire pressure monitoring sensors TPMS may be removed 3 EXHAUST The exit of the exhaust in the original location Section 13 10 C is not compulsory APPENDIX A STREET 4 PARTICIPATION REQUIREMENT If in two 2 consecutive SCCA Solo National Championships class SSR fails to achieve atten dance of 35 total participants in both Open and
41. axle location provided by a single locating arm on each axle The rear axle tube may be rotated about its axis The standard shock mounting and brake pipe brackets may be removed b The rear axle bearing retainer flange mating surface may be ma chined or shims may be installed under the rear axle bearing for the sole purpose of adjusting bearing axial float C Springs shock dampers their actuation and camber compensat ing devices are free BRAKING SYSTEM FRONT AND REAR a Standard VW Type 1 3 brake components disk or drum may be used including any standard VW Type 1 3 original Use of after market hubs disc or drum brake components in the front or rear of the vehicle or any combination thereof is unrestricted as long as the units chosen are deemed safe b Caliper housing material may be removed on the outer radius sur face of the outer piston housing to clear the inside of the rotating wheel c Any type lining or pad material may be used d Adapter plates may be fitted to allow mounting of front or rear brake calipers e Cross drilling or grooving of rotors is permitted Rotors made of a ferrous material shall be used on both the front and rear of the car f Caliper mounting is free Rotors must be of ferrous material Hubs and hats may be made of ferrous material or aluminum g The car shall be equipped with a dual braking system operated by a single control In case of a leak or failure at any point in the sys
42. but shall be scored separately An FSAE car may only compete directly in AM if it meets all AM requirements and specfications FSAE cars must also meet the following minimum crite ria 1 Current year FSAE restrictor plate and engine displacement rules Restrictor requirements are as follows a Gasoline fuel 20 0 mm 0 7874 intake restrictor b E85 fuel 19 0 mm 0 7480 intake restrictor c M85 fuel 18 0 mm 0 7087 intake restrictor 2 Current year FSAE aerodynamic rules F FSAE vehicles may not mix and match specifications from multiple years except as specified above 18 6 LEGENDS CARS AND DWARF CARS Vehicles comforming to the US Legend Cars International www uslegend cars com racing series specifications with exceptions and requirements 146 2015 SCCA NATIONAL SoLo RuLes 18 MODIFIED as noted in Appendix A are eligible to compete in Modified class F FM Bandolero and Thunder Roadster vehicles are not eligible for FM Vehicles comforming to the Western States Dwarf Cars Association Speci fications with exceptions and requirements as noted in Appendix A are eligible to compete in Modified class F FM 2015 SCCA NarionaL SoLo Rules 147 STREET CATEGORY EXCLUDED FROM STREET CATEGORY FOR REASONS OF STABILITY PER SECTION 3 1 Dodge Caliber non SRT Fiat 500 non Abarth Ford Fiesta non ST 2011 15 GEO Tracker amp Suzuki Sidekick Jeep C series MINI Countryman Nissan Juke
43. fac tory or any other source which do not meet standard part specifications e g hardness size etc are non compliant in Street Category except as specifically provided elsewhere in these rules Specific vehicle classifications are located in Appendix A of these rules 13 1 AUTHORIZED MODIFICATIONS If a modification is not specifically authorized in this or previous Sections of these Rules it is not allowed The addition of small holes for attachment hardware for authorized modi fications is implicit e g holes for fasteners to mount additional gauges holes for brackets to mount shock absorber remote reservoirs etc How ever these holes may serve no other purpose Allrepairs must comply with factory authorized methods and procedures or industry standard methods as follows If the OEM does not provide an appropriate method of repair industry standard methods and procedures may be used Such repairs may not result in a part or combination of parts that provides a competitive advantage e g significant change to weight suspension control power etc as compared to the standard part s Com petitors are strongly cautioned to use this allowance to make common sense repairs only It is not permitted to use non compliant parts even if they have been set to OE specifications Refer to Appendix F for past clarifications of these rules 13 2 BODYWORK A Accessories gauges indicators lights and other appearance co
44. installed These kits consist of either adjustable length arms or arm mounts that provide a lateral adjustment to the effective length of a control arm Alignment outside the factory specifications is allowed Caster changes resulting from the use of camber kits are permitted The following re strictions apply 1 On double unequal arm e g wishbone multi link suspensions only the upper arms OR lower arms may be modified or replaced but not both Non integral longitudinal arms that primarily control fore aft wheel movement e g trailing arm s or link s of a multi link suspension may not be replaced changed or modified On arm and strut MacPherson Chapman suspensions the lower arms may be modified replaced OR other methods of camber ad justment as allowed by Sections 15 8 C E or G may be used but NOT both On swing or trailing arm suspensions the main arms may not be modified or replaced but lateral locating links arms may be modi fied or replaced 4 The replacement arms or mounts must attach to the original stan dard mounting points All bushings must meet the requirements of Section 15 8 C Intermediate mounting points e g shock spring mounts may not be moved or relocated on the arm except as in cidental to the camber adjustment The knuckle bearing housing spindle assembly cannot be modified or replaced A non standard ball joint which is present in a compliant camber kit replacement control arm is permitted t
45. intake manifold may be used MINI Cooper S 2002 10 Mitsubishi Eclipse Turbo FWD amp AWD 1990 98 Lancer Evolution 2003 06 Morgan Plus 8 Nissan amp Datsun 2402 260Z 280Z incl 242 1970 78 280ZX incl 242 1979 83 300ZX Z31 chassis 1984 89 Alt part headlight covers 300ZX non turbo Z32 chassis 1990 96 Alt part rear facing hood scoop 3 5 max height 350Z 370Z 2009 14 Pontiac Fiero V 6 2 8L Alt suspension rear double A arm Air cleaner may protrude through engine hatch Solstice GXP Porsche 911 3 6L amp under non turbo Alt cyl heads twin plug 914 6 2 0L 2 5L 2 7L amp 2 8L 6 cyl air cooled Alt cyl heads twin plug 9248 1986 88 Alt cyl head P N 933 104 302 50 with 36 mm ex valves 924 Turbo 944 non turbo all 1982 91 968 1992 95 Boxster amp Cayman Saab 99 1968 84 900 Turbo amp 900 SPG Turbo 16v 1979 88 Saturn Sky Red Line Subaru Impreza AWD amp WRX all 216 2015 SCCA Nationat SoLo RULES APPENDIX A FP PREPARED SVX 1992 97 Sedans Coupes Turbo NOC Suzuki Swift Turbo Toyota Celica All Trac 1988 89 Celica All Trac 1990 93 Celica All Trac 1994 99 Celica Supra 1979 81 Celica Supra 1982 86 Supra non turbo 198675 92 Supra non turbo 1993 98 MR2 Supercharged Mk1 chassis 1988 89 Alternate parts 1985 89 chassis MR2 Turbo 1991 95 Triumph TR6 1969 76 TR8 215 c i or 4L TR250 1967 68 TVR 6 cy
46. non vented rotors may utilize vented rotors 2 Cross drilled and or slotted brake rotors may be used Slots holes are permitted only in the braking area of the rotor Rotors featuring a drum type parking brake in the hat area of the rotor may not be drilled or slotted in the parking brake area E Drum brakes may be replaced with disc brakes Disc brake rotors for such a conversion must be equal to or greater in diameter than the in side diameter of the standard brake drum Changes to backing plates mounting brackets brake lines to accommodate this change are per mitted but may serve no other purpose Drum to disc brake conver sions must be bolted not welded to the axle control arm upright F Air ducts may be fitted to the brakes provided that no changes are made in the body structure for their use They may serve no other purpose Backing plates and dirt shields may be modified or removed G A functional redundant emergency parking brake must be present H Brake calipers may be replaced provided the number of pistons is equal to or greater than the original number of pistons Caliper mounting brackets may be replaced to accommodate this change but may serve no other purpose Alternate caliper brackets must bolt to the original caliper bracket mounting location s 15 7 ANTI ROLL SWAY BARS Vehicles may only exceed the allowances of Section 13 7 as specified here 2015 SCCA NarioNAL SoLo Rute 97 15 SrREET PREPARED in
47. of the car is otherwise unre stricted If a mechanical pump is replaced a blanking plate may be used to cover the original mounting point Ww A cool can not exceeding one gallon in volume may be used The cool can may not be installed in the passenger compartment All emission equipment may be removed in part or in whole Remov al is the only permitted modification to emission control equipment When EGR air nozzles are removed from a cylinder head the resultant holes shall be completely plugged Cylinder Head 1 The original or a specified alternate cylinder head shall be used 2 Compression ratio may be altered by machining using any head gasket s or elimination of head gasket s 3 LEVEL 1 PREPARATION FULL PREP VEHICLES a Any valve guides and valve seats may be used b Heads may be modified per Section 17 10 A 1 4 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Heads may be ported within 1 0 25 4mm ofthe manifold mount ing surface b Fuel injector ports must be plugged if carburetors are used c Machining is allowed to accommodate the installation of O rings 2015 SCCA Nationat SoLo Rules 125 17 PREPARED to replace or supplement a cylinder head gasket d Valve seats are unrestricted Valve seat angles are unrestricted The valve seat insert can be no taller than inch 0 50 12 7 mm e Valve guide material is unrestricted but must have standard ex ternal dimensions G Cam
48. of the remote reservoir of a remote reservoir shock absorber is unrestricted No shock ab sorber can be capable of adjustment by the driver while the car is in motion unless fitted as standard 17 6 BRAKES Brake systems including calipers caliper mounts disks drums lines backing plates pedals boosters master cylinders handles proportion ing devices pads linings etc are unrestricted except for Section 3 3 3 re quirements and as follows A Brake rotors drums shall be located in the original position i e in board vs outboard B Brake rotor drum friction surfaces must be ferrous metal Carbon or ceramic composite brake rotors drums are expressly prohibited C Addition replacement or modification of Anti lock Braking Systems ABS is prohibited The standard system may be removed in its entire ty or disabled electrically in a manner not readily accessible while driv ing but not altered in any other way Sensors and computers are con sidered part of the ABS system and may be not altered nor relocated D LEVEL 2 PREPARATION LIMITED PREP VEHICLES 1 Standard calipers must be retained Alternate brake rotors and drums must be the standard diameter width and design Rotors shall not be cross drilled or slotted unless fitted as OE 2 Cars fitted with rear drum brakes may convert to rear disc brakes When converting from rear drum to rear disc brakes the rear brake rotors can be no larger in diameter than t
49. openings may be matched pro vided no change is made more than one inch from the port manifold interface Material may be removed to facilitate port matching but no material may be added U Any transmission oil cooler may be used V The engine cylinder head s may be milled only to that amount specified in the manufacturer s workshop manual If no amount is specified then a maximum of 0 010 0 254 mm may be milled W Axle halfshaft and driveshaft retention location devices may be in stalled for safety reasons to control the motion of attached shafts upon the failure of a coupling or universal joint They may serve no other purpose This allowance does not include C clip eliminators X Any crankshaft damper or pulley may be used SFI rated dampers are recommended Supercharged cars may not change the effective diam eter of any pulley which drives the supercharger Y Any accessory pulleys and belts of the same type e g V belt serpen tine as standard may be used This allowance applies to accessory pulleys only e g alternator water pump power steering pump and crankshaft drive pulleys Supercharged cars may not alter crankshaft supercharger drive ratio Alternate pulley materials may be used Idler pulleys may be used for belt routing in place of items which the rules specifically allow to be removed such as smog pumps and air condition ing compressors They may serve no other purpose Z Camshafts and related parts must r
50. or both sides If the original base model hood has a 2 50 8 mm bulge then an 2015 SCCA Nationat SoLo Rules 199 PREPARED CP APPENDIX A 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 There is no allowance for non standard heat extraction vents Traction control stability control may not be added to a car which was not equipped with an OE traction stability control system OE systems may be retained but may not be replaced or modified in any way other than removal The following weights apply unless a specific weight is indicated with the model listing Minimum weight Ibs V8 engines greater than 5100 cc e 3000 V8 engines equal to or less than 5100 cc eneen 2700 6 cyl engines maximum 4500 cc eneen 2450 Turbocharged 6 cyl engines maximum 4500 ce 2550 Turbocharged 4 cyl engines reee 2450 Maximum weight on the rear of the car shall be 51 of the total weight ofthe car EXCEPTIONS Corvair Yenko Stinger Wheet size ahowances are as per 17 4 Wheels may be replaced with a wheel having any diameter and any width without weight adjustments AMC AMX 1968 70 Gremlin 8 cyl 1970 78 Javelin 1968 74 Spirit 8 cyl 1979 83 Chevrolet Camaro 1967 69 Camaro 1970 81 Camaro 1982 92 Camaro 1993 02 Corvair amp Corvair Turbo 1960 64
51. original springs may be removed 3 Any shock absorbers may be used The total number of shock absorb ers installed shall not exceed the number originally installed by the manufacturer 4 Attachment points for the shock absorbers may be changed There shall be a metal panel covering or bulkhead separating non stan dard rear attachment points from the driver 5 Lever shock absorbers may be modified or entirely eliminated When lever shocks are replaced with tubular shocks the entire shock assem bly may be removed and replaced with a control link and bracket that approximates the control function of the original lever shock D LEVEL 2 PREPARATION LIMITED PREP VEHICLES 1 Any springs or torsion bars can be used provided the quantity and type of these items remains as standard Springs and torsion bars must be installed in the standard location using the standard system of attachment The use of tender springs is permitted provided the tender springs are completely compressed when the car is at static ride height Static ride height will be determined with the driver 120 2015 SCCA NATIONAL SoLo Rules Fastrack News April 2015 17 PREPARED seated in the normal driving position 2 Shock absorbers are unrestricted provided the quantity and type i e tube lever of these items remains as fitted standard Shock absorbers must be installed in the standard location using the stan dard system of attachment The mounting
52. permits the removal of heater boxes in order to install headers on such cars 102 2015 SCCA NATIONAL SoLo RULES 15 SrREET PREPARED J Engine and transmission mounts may be replaced but must attach in the factory location s without additional modification or changes Engine position may not be changed Hydraulic shock type rear engine loca tors or bobble struts may be replaced by manufacturer s performance part or aftermarket replacement part This part must retain factory di mensions and attachment points including factory design Example If factory locator bobble strut is gas or hydraulic piston type replace ment part must be gas or hydraulic piston type If one or more non OE engine or transmission mounts are used Section 15 10 K does not ap ply and a torque suppression device may not be used K One bolt on torque suppression device may be used A torque suppres sion device attaches from the engine to the body frame or subframe in one location and controls engine movement at that location along a single axis only It may serve no other purpose Examples of permitted devices 1 A chain 2 A rod with spherical bearings at each end Examples of devices not permitted 1 Any link which confines movement along more than one axis 2 An engine mounting plate or one or more plates rigidly bolted between the engine and the frame Holes may be drilled to mount a torque suppression device The installation may not include
53. required Any dune buggy production or non production street car meeting all GCR SRCS rule requirements may alternately run in BM with full BM Solo Rules aero allowances The following applies to all Sports Racers in AM BM or CM 1 Minimum track is 42 0 106 68 cm front and rear 2 Minimum wheel diameter is 10 No maximum wheel diameter No min imum rim width Maximum rim width is 15 144 2015 SCCA Nationa SoLo Rules 18 MobirieD 3 All four wheels are sprung from the chassis 4 Wing area shall be calculated as described herein 18 3 FORMULA CARS Single seat open wheeled cars are referred to as Formula cars and are assigned to Modified classes B BM C CM and F FM BM cars must comply with the current year Club Racing GCR except as noted by the Solo Rules including Appendix A and the competitor must indicate on his entry form to which set of specifications the vehicle was prepared CM and FM cars must conform to the current year Club Racing GCR except Solo Vee and Formula 440 500 vehicles which are allowed the addi tional modifications and exceptions listed in Appendix A Formula cars not conforming to the GCR eligible for BM CM or FM are considered Specials The competitor must have the referenced GCR in his possession during the event Exceptions to the GCR are as follows A Wing area shall be computed as described herein B Front impact attenuation device GCR Section 9 4 5 G does not apply 18 4
54. s h Removal of the drum brake backing plates i In the link pin suspension non standard offset link pin bushings in order to obtain desired negative camber Clearancing of carrier or trailing arm to prevent binding is permitted The rubber portion of the bump stop may be removed Caster camber toe in and link pin inclination are free j In the ball joint suspension the camber caster adjusting replaced with an aftermarket nut of different design Caster camber and toe in are free k Any wheel bearings that fit the VW sedan spindles and brake drums or disk brake hubs without modification I Steering column altered or replaced Steering wheel is free and may be detachable Steering mechanism is free but tie rods must attach to the spindle using existing steering arm a modified steering arm or a suitable new or modified bracket welded to the 224 2015 SCCA NarionaL SoLo RULES 6 N APPENDIX A CM MODI FIED spindle Ball joints in the tie rods may be replaced with rod ends WHEELS a Any wheels and tires are allowed Resulting track changes are al lowed Studs may be substituted for wheel attachment bolts in the original location Bolt pattern may be changed b 4 or 5 lug wheel hubs may be used Wheel mounting lug bolts may be replaced with studs REAR SUSPENSION a The rear axle and tube assembly shall be standard VW Type 1 se dan up to 1966 swing axle no outer pivot point for a half shaft with
55. specified herein or as part of an SCCA approved GT 1 bodywork package for the specific make and model The hood tub roof rear fenders and rear deck are not permitted to be reshaped to achieve downforce The front of the car may be reshaped to accommodate the construction of spoilers air dams and splitters and may be widened to rear body width as specified in Section 18 1 E 3 c below Ramps joining the front fender flares to the splitter spoiler airdam assembly which are included as part of a SCCA approved GT 1 front bodywork package are allowed Front Aero a The standard OE or a non standard front spoiler or air dam may be used A non standard front spoiler is not permitted to pro trude forward beyond the overall outline of the car as viewed from above or aft of the forward most part of the front fender opening and shall not be mounted more than 4 0 101 6 mm 2015 SCCA Nationat SoLo Rules 141 18 MobiFIED above the horizontal centerline of the front wheel hubs The spoiler may cover the normal grille opening at the front of the car Cooling duct openings are permitted If the front radiator is removed or relocated no aerodynamic use ofthe unobstructed front radiator pathway may be made The front spoiler may be attached to the original bodywork or it may replace the body work it would otherwise cover The front spoiler may not be wider than the rear bodywork measured as the maximum distance between the outside
56. standard Crankshaft journals may be ground undersize a maximum of 0 030 0 762 mm less than standard dimensions Crankshaft pulley is unre stricted g Deep sump oil pan up to 2 5 qt 2 37 L additional capacity is permitted The installation of baffles housed completely within the oil pan and crankcase is permitted The use of any standard VW oil pump is permitted Dry sump systems are permitted Re placement of oil gallery plugs with threaded plugs is permitted Oil filters and oil coolers are unrestricted provided that they are securely mounted completely within the bodywork A pressure 222 2015 SCCA Nationat SoLo RULES APPENDIX A CM MopiFiep accumulator e g Accusump may be fitted h Camshaft and valve train components are unrestricted with the following exceptions 1 Pushrods shall be made of metal 2 Valve lifters tappets shall be dimensionally and functionally identical to and made of the same material as the standard VW parts Ww Roller camshafts are prohibited Bs Rocker arms shall be standard ratio VW al Valve guide material is unrestricted provided that the distance between valve centers and the angles of the valves does not change i Porting polishing and machining of the intake and exhaust ports is permitted The addition of material in any form is prohibited Valve seat angles are unrestricted j Compression ratio may be increased by additional machining of any factory m
57. standard part D al Electronically controlled shocks may not be used on vehicles not originally equipped with such units Vehicles originally equipped with electronically controlled shocks may use the standard parts or non electronically controlled alternative shocks subject to all the re quirements of Section 13 5 Non standard electronically controlled shocks are not allowed B The mounting hardware shall be of the original type The use of any shock absorber bushing material including metal is permitted Pressed 2015 SCCA NarioNAL SoLo Rules 75 13 STREET or bonded bushings may be removed from standard parts to facilitate the use of alternate bushings which fit in the original location without alterations to the part This does not permit the use of an offset shock bushing A shock absorber bushing may be implemented as a spherical bearing The bushing attaching the end of a strut to the body or frame On a strut type suspension is a suspension bushing not a shock bush ing For cars with a bayonet shaft type upper shock mount this allowance permits the removal of the shock bushing from the upper mounting plate e g drilling cutting burning out the bushing and replacing it with another bushing This also includes shock bushings located in con trol arms etc This does not allow other modifications to the plate itself or use of an alternate plate C To facilitate the installation of commonly available aftermark
58. substituting crankshaft oil seal s and related attachment devices 6 Balance shafts may be removed Pistons and Rods 1 Pistons pins clips and or pin retainers and piston rings are unre stricted Pistons shall be constructed of metal 2 LEVEL 1 PREPARATION FULL PREP VEHICLES Alternate connecting rods made of ferrous material are permitted 3 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Standard connecting rods are required but can be lightened and balanced b Connecting rod fasteners bolts and nuts are unrestricted Crankand Flywheel 1 The original direction of crankshaft rotation and firing order shall be maintained 2 The use of any external crankshaft vibration dampener is permitted 3 The linkage between the clutch pedal and the clutch housing clutch actuating mechanism is unrestricted but may serve no other pur pose A mechanical linkage may be replaced with a hydraulic system Any clutch pedal may be used 4 LEVEL 1 PREPARATION FULL PREP VEHICLES a The crankshaft may be replaced with another of the same basic material provided the angles of the crank throws remain the same No change in stroke is permitted unless authorized in Ap pendix A b Any clutch is permitted c Any steel or aluminum flywheel is permitted 5 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Standard crankshafts are required The crankshaft may be light ened and balanced Journal diameters can be a maximum under size o
59. the welding of any plate s to the bodywork or to the motor mount s nor may it include multiple non parallel links If a torque suppression device is used Section 15 10 J does not apply and replacement engine mounts may not be used L Engine cooling radiators may be replaced with alternate parts subject to the following restrictions 1 Radiator core dimensions width height thickness must be no smaller than the standard part 2 Radiator must mount to OE radiator mounts 3 Fluid capacity and dry weight of the radiator must be no less than that of the standard part Installation of an alternate radiator may serve no other purpose e g to allow a cold air intake passage M The engine fan and fan shroud unless it serves another purpose e g as an alternator generator mount may be removed modified or re placed Electrically driven fans are allowed Flex fans are not allowed N On two cycle engines the ports must be of standard heights size and configuration crankcase volume and reed plates must not be altered O Any metal clutch assembly metal flywheel or metal torque converter that uses the standard attachment to the crankshaft may be used Non metallic friction surfaces e g clutch disks are permitted Dowel pins may be added Any hydraulic clutch line may be used Replacement or substitution of the clutch slave cylinder is permitted P Any mechanical shift linkage may be used Q Limited slip differentials are pe
60. 0 LS 400 amp SC 400 Mazda 929 MazdaSpeed6 Mercedes 230SL 250SL amp 280SL all 350SL 380SL amp 450SL all 220 230 250 amp 280 Sedans all 280 4 5L all amp 300 6 3 all Sedans Mitsubishi 3000 GT non turbo Starion Turbo 2Fastrack News February 2015 2015 SCCA Nationa SoLo Rules 187 STREET PREPARED APPENDIX A ESP CONTINUED Nissan 300ZX non turbo 1984 89 300ZX non turbo 1990 96 Peugeot 405 Saab SPG 16v amp Turbo Saleen Mustang 302 amp 351 non super charged 1984 93 Shelby GT350 1965 66 GT350 amp GT500 1967 70 Subaru Forester 2 5XT Legacy 2 5GT 2005 12 Toyota Supra all 198675 92 Supra non turbo 1993 96 Volvo 700 Series all 800 Series all S60 amp V70 Volkswagen Passat W8 4Motion American 6 cyl amp V8 sedans amp pick ups not otherwise classified Other sedans over 3 0L not other wise classified See Section 15 1 C for update back date limitations 188 2015 SCCA NATIONAL SoLo RULES F Street PREPARED FSP Acura Integra 1986 89 Legend Alfa Romeo 1300 all 1600 all 1750 all 2000 all Alfetta GT AMC 4 cyl all Audi 80 all 90 all 100LS all 4000 all 5000 Austin America all Mini amp Mini Cooper 850 970 997 998 1071 amp 1275 all Austin Healey Sprite all 100 4 100 6 amp 3000 BMW 1600 1800ti amp 1800 TiSA 1600 2 1602 amp 2002 tii
61. 0 05 Corolla non turbo 2WD 1984 87 Corolla non turbo 2WD 1988 92 Alt engine 4A C Corolla non turbo 2WD 1993 97 Corolla non turbo 2WD 1998 2002 Corolla non turbo 2WD 2003 08 Paseo non turbo 2WD 1991 97 Tercel non turbo 2WD 1980 82 Tercel non turbo 2WD 1983 86 Tercel non turbo 2WD 1987 90 210 2015 SCCA Nationat SoLo RuLes APPENDIX A EP PREPARED Tercel non turbo 2WD 1991 94 Tercel non turbo 2WD 1995 99 Yaris Sedans non turbo FWD NOC Volkswagen Corrado 16v non supercharged 1988 95 Rabbit Jetta Scirocco Cabriolet amp Pickup A1 chassis 8v 1975 92 Golf amp Jetta A2 chassis 1985 93 Golf GTI amp Jetta A3 chassis 1 8 L amp 2 0 L non turbo 1993 98 Golf GTI amp Jetta A4 chassis 2 0 L non turbo 1999 2005 Golf GTI amp Jetta A5 chassis 2 5 L 5 cyl 2006 09 New Beetle 2 0 L non turbo amp 2 5 L 5 cyl 1998 2010 Sedans N A FWD NOC Yugo 1986 92 Other 4 cyl N A FWD NOC LEVEL 2 LIMITED PREPARATION VEHICLES This list of vehicles and the allowances below was developed from Level 2 Limited Prep vehicles listed in the Club Racing GCR under Production Cat egory The goal is for these cars to be less expensive and easier to prepare but allow them to be fully competitive with the cars currently in Prepared class E EP The following vehicles are classed in EP with the Level 2 Limited Prep al lowances per Se
62. 02 05 Kia Forte amp Forte Koup 2 0L Optima Rio 2012 15 Sephia Spectra5 Lancia Beta Scorpion Lexus CT200h 2011 15 ES 250 ES 300 GS 300 Lincoln LS V6 3Fastrack News March 2015 172 2015 SCCA NATIONAL SoLo RuLEs Lotus Cortina Mazda 323 non turbo 626 808 929 Cosmo GLC Mazda2 2011 15 Mazda3 2004 15 Mazda6 all Millenia all MX 3 MX 6 all Prot g non Mazdaspeed R100 RX 2 RX 3 RX 4 Mercedes 280 1995 2000 NOC Mercury Bobcat Capri all except V8 Cougar 4 cyl amp V6 non S C LN 7 Lynx Milan all Montego Mystique all Sable Scorpio Topaz all Tracer MG all MINI Clubman non S non JCW 2008 14 Cooper Hardtop non S non JCW 2002 13 Cooper Coupe non S non JCW 2012 15 Cooper Roadster non S non JCW 2012 15 HS CONTINUED Mitsubishi 3000 GT non turbo Cordia Eclipse all FWD 1989 2012 Galant 4 cyl non turbo Lancer non turbo Mirage Precis Premier Starion non turbo Tredia Nissan Datsun 200SX all 240SX 300ZX non turbo 1984 89 Altima all Maxima all NX1600 NX2000 1991 93 Pulsar Sentra all Stanza Versa 2007 15 Oldsmobile Calais W41 Opel 1100 1900 GT Isuzu Manta Peugeot 405 all 505 1979 91 Pininfarina 2000 Plymouth Acclaim all Arrow Champ Colt Horizon Laser non turbo Neon 2000 01 Sapporo Scamp APPENDIX A STREET Sundance all TC3 Turismo Pontiac Fiero 4 cyl Firebird 4
63. 15 7 ANTI ROLL SWAY BARS EE 97 19 6 SUSPENSION naaa tende tet sien ads 98 15 ELECTRICAL SY STEM aa 100 15 10 ENGINE AND DRIVE TRAIN e 101 15 11 OUT OF PRODUCTION CARS eee 105 16 STREET MODIFIED CATEGORY eee 107 16 1 ALLOWED MODIFICATIONS eene 108 16 2 MINIMUM WEIGHTS maa trita ii 112 17 PREPARED CATEGORY sp aai 113 17 1 AUTHORIZED MODIFICATIONS eee 114 17 2 BODYWORK AND STRUCTURE eee 114 Wear UE 119 Re Wel 119 17 5 SHOCK ABSORBERS A SPRINGS 1 se 120 MAO BRAKES veces EE M 121 17 7 ANTI ROLL SWAY BARS Ul essent 121 17 8 SUSPENSION SUSPENSION CONTROL 121 1I ELECTRICAL SYSTEM eate oit eite tee tt eene 123 17 10 ENGINE AND DRIVETRAIN ue 123 NAG AA OTHER 040 ETUDES 131 RS tite iis a Leite ag ite d zeran n Zeydan aenea 132 10 2015 SCCA NarionaL SoLo RuLes 18 MODIFIED CATEGORY esee nee 133 18 1 MODIFIED PRODUCTION BASED CARS 136 18 2 SPORTS RACERS da dert id KANA ANA 144 16 5 FORMULA CARS costal dt 145 E E mamasa E 145 18 5 FORMULA SAE FSAE aaa a entera 146 18 6 LEGENDS CARS AND DWARF CARS uuu ieee eee 146 19 KART CATEGORY namamasa tro erat GAGANA GNG 149 19 KART MODIFIED KM 5 ice ette naut ee iua tn 149 19 2 FORMULA JUNIOR mamamana san nn tentus 154 20 PROSOLO NATIONAL SERIES RULES 159 20
64. 318i 8v E30 chassis 318i amp 318is E36 chassis 318ti E36 chassis 320i Chevrolet Pontiac Buick Oldsmo bile Geo amp Suzuki Beretta 4 cyl Camaro 4 cyl 1982 86 Chevette amp T1000 Citation amp Omega Corvair non Yenko Fiero 4 cyl Firebird 4 cyl 1982 86 Metro amp Swift 1985 88 Metro amp Swift 1989 93 Monza NOC Starfire Omega Astre amp Skyhawk RWD Phoenix amp Skylark Prism S 10 1994 2004 FSP coNTINUED Spectrum 1 5L non turbo 1985 89 Spectrum NOC Sprint amp Sprint Turbo Storm all Sunbird 4 cyl Vega amp Cosworth Vega Chrysler Plymouth amp Dodge Acclaim 4 cyl non turbo Arrow 1600 2000 amp 2600 Champ non turbo all Colt non turbo FWD Colt 8v non turbo Colt 1600 amp 2000 RWD Daytona non turbo Horizon TC3 amp Turismo 1 7L 1 8L amp 2 2L Laser non turbo 1989 99 Neon all 1994 05 Omni 024 amp Charger Rampage 2 2L Sapporo 1600 2000 amp 2600 Shelby 2 2L non turbo 1983 84 Spirit 4 cyl non turbo Dodge Mitsubishi amp Eagle Colt amp Mirage non turbo 1984 88 Colt Mirage amp Summit non turbo 1989 92 Colt Mirage amp Summit non turbo 1993 96 Eagle Talon non turbo 1989 99 Fiat amp Bertone 124 1966 74 128 131 amp Brava 850 Sedan 850 Coupe amp Spider Strada X1 9 all Ford amp Mercury Capri II 1976 77 Cortina Escort EXP Lynx amp LN7 1981 90 APPENDIX
65. 37 VII Entrant Eligibility and Licensing eee 237 VII MMOEKGES aaa MAA KA akan zara x ba Ves nA ZER ae 237 IX Event Safety Requirements sss 237 X Vehicle Safety Equipment Requirements ususssss 238 XI Driver Safety Equipment Requirements ssusssssss 240 APPENDIX E SOLOG SAFETY STEWARD GUIDEBOOK 242 INTRODUCTION 22am tute torreta 242 Il START OF THE SSS PROGRAM meme 243 Ill DIVISIONAL SOLO SAFETY STEWARD sesen 243 IV APPOINTMENT OF SSS FOR SOLO EVENTS 244 V PROCEDURES FOR BECOMING A SSS 7 asii 244 VI PROCEDURES FOR BECOMING A SSS INSTRUCTOR 245 VII SOLO EVENTS AT RACING FACILITIES An 245 VIII RESPONSIBILITIES OF A SSS 2 ee eeteeeeeeeenneeeeeeeee 246 A The Use Of Deputy Solo Safety Stewards 247 12 2015 SCCA Nationa SoLo RULES 13 STREET 13 STREET CATEGORY Carsrunning in Street Category must have been series produced with nor mal road touring equipment capable of being licensed for normal road use in the United States and normally sold and delivered through the manu facturer s retail sales outlets in the United States A Canadian market ve hicle is eligible for Street category if it is identical to the US market coun terpart except for comfort and convenience modifications as allowed per Section 13 2 A A member may request c
66. 50S 1500 Alternate crankshaft 125 E TVR 1800 Volkswagen Beetle 1300 1965 66 Beetle 1300 1500 amp 1600 1967 69 Beetle 1600 1970 77 Volvo 122S 1956 70 Alt part front axle cross member Alt engine kit 2127 cc 142S amp 142E 1967 74 Alt part front axle cross member Alt engine kit 2174 cc P 1800 1780 cc P 1800 1982 cc Sedans RWD NOC Other 4 cyl N A RWD NOC 206 2015 SCCA Nationat SoLo RULES APPENDIX A EP PREPARED E Prepare EP Wheel size allowances are as per Section 17 4 Minimum weights are determined by engine displacement Increases in engine displacement resulting from legal overbore are not considered in these calculations Wheels up to 10 wide are allowed with no weight increase a maximum width of 12 is permitted Wheels greater than 10 up to 12 wide will re ceive an increased weight of 100 Ibs WEIGHT FORMULAS LBS Piston Engines 1 00 x displacement cc Engines with 3 or 4 valves per cylinder and displacement less than or equal to 1667cc 1 06 x displacement cc Engines with 3 or 4 valves per cylinder and displacement greater than 1667cc 0 91 x displacement cc 250 lbs Engines with 2 valves per cylinder 1 00 x displacement cc Vehicles competing under Level 2 Limited Prep allowances 1 00 x dis placement cc Regardless of the weight formulas above no car may weigh less than 1350 Ibs or be required to weigh more than 2200 lbs prior to
67. 56 amp 1600 9245 8 944 8v Carrera 4 cyl Scion amp Subaru FR S amp BRZ 2013 14 Toyota MR 2 amp MR 2 Supercharged 1st gen 1985 89 MR2 Spyder 2000 05 Sedans over 1 7L amp under 3 0L not otherwise classified Sports cars under 2 0L not other wise classified See Section 15 1 C for update back date limitations D Street PREPARED DSP Acura Integra 1990 93 Integra incl Type R 1994 01 RSX all TSX Alfa Romeo GTV V6 all Milano Audi A3 2005 13 A4 1 8T FWD amp quattro 1995 01 A4 1 8T FWD amp quattro 2002 05 Coupe GT amp Quattro 1980 88 BMW 318 16v amp 325 E30 chassis 318 E36 chassis 323 325 amp 328 E36 chassis 323 325 328 amp 330 E46 chassis non M3 3 Series 16v NOC Bavaria Chevrolet Pontiac Buick Oldsmo bile amp Geo Cobalt SS N A 2005 07 Cobalt SS Supercharged 2005 07 Cobalt SS Turbo 2008 10 HHR SS Turbo J Body 4 cyl Turbo Quad 4 DOHC amp V6 L Body Quad 4 amp V6 N Body 4 cyl Turbo Quad 4 amp V6 Spectrum Turbo 1985 89 Storm GSi 1985 89 X Body V6 Chrysler Plymouth amp Dodge Acclaim V6 amp Turbo Charger GLH S Conquest amp Starion non turbo Crossfire non SRT 6 Daytona Turbo Daytona V6 GLH S amp GLH Turbo Laser Turbo NOC amp K car Turbo Shadow 4 cyl Turbo amp V6 APPENDIX A STREET PREPARED Shelby Charger Turbo Spirit 4 cyl Turbo amp V6 SRT 4 Sundance Turbo Do
68. 6 cyl 1994 04 Mercury Capri 6 cyl amp 8 cyl 1979 93 Capri Turbo 4 cyl 1979 93 Comet 6 cyl amp 8 cyl 1971 77 Merkur XR4Ti 1985 88 Pontiac Firebird amp TransAm 1967 69 Firebird amp TransAm 1970 81 Firebird amp TransAm 1982 92 Firebird amp TransAm 1993 2002 Trans Am Turbo 1989 GTO 2004 06 Saleen Mustang w o IRS or forced induction 1979 93 Shelby GT350 amp GT500 1965 70 Yenko Stinger 1965 69 E weight Ibs 1850 US Sedans 6 cyl and 8 cyl NOC 2015 SCCA Nationat SoLo Rules 201 PrePARED DP APPENDIX A D Preparep DP Weights are determined by the following formulas Wheel sizes valve siz es and track dimensions are as per Section 17 Minimum weights are determined by engine displacement Increases in engine displacement resulting from legal overbore are not considered in these calculations Wheels up to 10 wide are allowed with no weight increase A maximum of 12 is permitted WEIGHT FORMULAS LBS Engines with 3 or 4 valves per cylinder and displacement less than or equal to 1667 cc 1 06 x displacement cc Engines with 3 or 4 valves per cylinder and displacement greater than 1667 cc 0 91 x displacement cc 250 lbs Engines with 2 valves per cylinder 1 00 x listed displacement cc Engines with 2 valves per cylinder are permitted a displacement change of 10 via bore stroke changes only and with the weight formula accounting for the increased dis
69. 7 7A Super 7 and their clone or kit forms such as Birkin Westfield Locost are automatically classified as Modified Tubs This also applies to the Shelby Cobra and its clones i Tube frame cars are included in this tub category 3 Materials all tubs a Ferrous metal containing iron must be used for all primary load bearing structures of the car The primary load bearing structure is the main tub or chassis and its connections to the suspension No aluminum cages or roll bars are allowed Any fer rous or aluminum alloy is permitted for suspension arms loca tion links and uprights spindles Beryllium and beryllium alloys are not allowed anywhere on the car b The exceptions to the above are parts of the donor production cars that were originally non metal In all cases replacement of these parts or addition of more load bearing structure must be by metal Lighter replacement sections may not be used between bulkheads in a Stock Tub without it becoming a Modified Tub c Lightweight substitute materials such as carbon fiber are permit ted only so long as they are clearly not load bearing in the prima ry structure or the suspension For example outer body panels in the central tub region must be attached in a flexible manner such as with Dzus fasteners if non standard material composition or non standard material thicknesses are to be used d Cars that have been approved for DM and EM as clones do not have the freedom to u
70. 7 mm shall be used when measuring floor pan dimensions from the car s original specifications I Other 1 At least the width of each tire must be covered by the fend ers when viewed from the top of the fender perpendicular to the ground No sharp edges are permitted 2 Suspension systems and wheels are free The use of a windscreen is not required De w Roll bar requirements for cars competing in DM and EM are as spec ified in Section 3 3 2 18 2 SPORTS RACERS Closed wheel vehicles are referred to as Sports Racers and are assigned to Modified classes A B and C AM BM and CM AM vehicles do not have to comply with any Club Racing GCR while BM and CM vehicles must comply with the current year GCR The competitor must indicate on his entry form to which set of specifications that the car is prepared Vehicles that qualify as Sports Racers are those listed in the GCR SRCS dune buggies and production based automobiles whether or not from Appendix A Dune buggies and DM EM cars are allowed in BM at Club Racing ASR CSR and DSR engine and weight rules as long as they do not exceed the DM EM aero rule allowances and with the following noted specifics A Tire covering shall be as noted in the DM EM rules B Minimum body width between front and rear tires does not have to extend to the mid plane of the rims C Suspension does not have to be covered when observed from above D The BM minimum wheelbase of 80 0 203 2 cm is not
71. 990 2005 RX 7 non turbo Morgan 4 4 amp Plus 4 Pontiac Fiero V6 Porsche 924 Turbo Audi engine 1979 81 924S 1986 88 944 8v Shelby Charger GLH S 1987 Sunbeam Tiger Triumph TR 8 Toyota MR2 non turbo 1985 95 MR2 Spyder 2000 05 MR2 Supercharged TVR 4 cyl inline 6 APPENDIX A STREET F STREET CLASS FS AMC AMX Javelin V8 Audi A6 V8 1997 2015 A6 V6 Supercharged 2008 15 S4 V8 2004 09 BMW 128i 135i amp 135is 2008 13 228i amp M235i F22 2014 15 323i amp 328i E46 1999 328d 2014 15 328i F30 F31 F34 2012 15 335d 2009 11 3 Series including M3 E46 E90 E91 E92 E93 2000 13 428i amp 435i F32 F33 F36 2014 15 5 series NOC 6 series coupe 8 series coupe M5 1988 93 2000 03 Buick Regal amp Grand National Turbo V6 Cadillac ATS 2 0L Turbo 2013 15 CTS amp CTS V Chevrolet Camaro V6 2010 15 Camaro SS base car only incl GM installed 1LE 1998 2002 Camaro SS incl 1LE 2010 15 Camaro V8 non supercharged NOC Corvette 1953 62 Chrysler 300 incl SRT8 2004 15 Crossfire SRT 6 2005 06 Datsun 280ZX Turbo Dodge Challenger all 2008 15 Charger V8 2006 15 Magnum incl SRT8 2005 08 Fastrack News April 2015 2015 SCCA NarionaL SoLo Rules 167 STREET APPENDIX A FS CONTINUED Ram SRT10 2004 06 Stealth Turbo Ford Crown Victoria Mustang Boss 302 non Laguna Seca 2012 13 Mustang Cobra
72. A NarionaL SoLo RULES 17 PREPARED fenders may be replaced in their entirety Cars with non removable fenders may replace the front fender panels going forward from the foremost door opening and the rear fender panels going rearward from the rearmost door opening Closed cars must not remove standard ma terial above the horizontal line placed at the lowest point ofthe driver s door window opening with the exception that OE removable panels e g T tops targa tops sunroofs may be removed or replaced with panels of alternate material provided that the dimensions of any re placement panel do not vary from those of the original by more than 1 0 25 4 mm in any direction The approval of alternate body panels does not authorize the use of underbody or belly pans forward of the firewall or aft ofthe front edge of the rear wheel opening Ground effect tunnels and or attempts to gain ground effects are also not authorized Any such elements incorporated in the otherwise approved compo nents must be removed or disabled Front hoods and engine covers may be vented and or louvered The total area for all vents louvers on a vehicle may not exceed 500 sq in 3225 8 cm unless provided as standard equipment The total area is measured as the total open area or the perimeter of the louvers when viewed from above The location number and shape of vents louvers is unrestricted pro vided they are fully contained on allowed panels For vehicles
73. A STREET PREPARED Escort Escort GT amp Tracer 1991 96 Escort ZX2 amp Tracer 1997 2002 Festiva Fiesta 1976 80 Focus all 1999 2007 Fusion amp Milan 4 cyl Mustang II 4 cyl 1974 78 Mustang amp Capri 4 cyl non turbo Pinto amp Bobcat 1600 2000 amp 2300 Pinto Wagon 2000 2300 amp 2600 Probe 4 cyl non turbo Honda Accord 1976 81 Accord 1982 12 Civic 1973 79 Civic 1980 83 Civic amp CRX all 1984 87 Civic 1992 95 amp Del Sol 1992 96 SOHC Civic non Si 1996 2000 Civic non Si 2001 05 Civic non Si 2006 12 Prelude 1979 82 Prelude 1983 87 Prelude 1988 91 Hyundai Elantra Excel Scoupe NOC all Infiniti G20 Isuzu I Mark 1 5L non turbo FWD models 1985 89 I Mark RS 16v 1985 89 I Mark RWD 1980 85 Impulse non turbo 1983 89 Stylus S 12v 1990 93 Kia Spectra 1 8L 4 cyl Lancia Beta amp Zagato 1975 83 2015 SCCA Nationat SoLo Rules 189 STREET PREPARED APPENDIX A FSP coNTINUED Mazda Mazda2 Mazda3 323 non turbo 1986 89 323 MX 3 4 cyl amp Prot g 1990 94 626 FWD all 626 RWD all Cosmo all GLC FWD all GLC RWD all MX 6 4 cyl non turbo Prot g 1995 98 Prot g 1999 2003 R 100 RX 4 MG 1100 1300 Sedan all A all B amp B GT all C amp C GT all Midget 948 1098 1275 amp 1500 all MINI Cooper non S 2002 13 Mitsubishi Cordia non turbo Eclipse 1989
74. ABSORBERS A The make of shock absorbers struts and strut housings may be sub stituted providing that the number type e g tube lever etc system of attachment and attachment points are not altered except as noted below The interchange of gas and hydraulic shocks absorbers is per mitted The following restrictions apply 1 No more than 2 separate external shock damping adjustment con trols are allowed This permits the use of shocks which originally came with more than two external adjustments which have been converted to double adjustables only if the additional adjustment controls have been permanently disabled e g via welding ep oxying grinding off Gas pressure adjustment is not considered a damping adjustment N Suspension geometry and alignment capability not including ride height may not be altered by the substitution of alternate shock ab sorbers Aftermarket strut housings are allowed provided that they meet the Street category shock requirements defined herein i e that no suspension geometry changes result This includes the po sition of the steering arm attachment point in the case of struts with integrated steering arms Ww Adjustable spring perches are allowed but the spring loadbearing surface must be in the same location relative to the hub as on the standard part Shims may be used to achieve compliance The fully extended length must be within 1 25 4 mm of the di mension of the
75. Cat egory rules in the following ways Any modification not specifically au thorized by the Street Category or Street Prepared rules is prohibited No unauthorized modifications are permitted in order to accommodate authorized modifications e g non standard hood scoops or holes nec essary for carburetor clearance Structural modifications such as the addition of members known as jacking rails are not permitted unless specifically authorized herein C Equipment and or specifications may be exchanged between different years and models of a vehicle if a the item is standard on the year model from which it was taken and b the years models are listed on the same line of Appendix A Street Prepared Classes The updated backdated part or the part to which it is to be attached may not be altered modified machined welded or otherwise changed to facilitate the updating backdating allowance Standard factory in stallation methods locations and configurations are allowed The up dating and or backdating of engines transmissions transaxles and or unibodies must be done as a unit component parts and specifications of these units may not be interchanged Cars not listed in the Street Prepared Sections of Appendix A may not be updated backdated until approved by the SEB and published in the official SCCA publication D Alternate computer control modules may be used whenever an equiva lent change to the conventional system is a
76. Cirrus V6 Laser all PT Cruiser non turbo 2001 2010 Sebring all Daewoo all Datsun 1200 1500 amp 1600 Roadster 210 amp B 210 310 510 610 710 810 F10 Dodge 024 Avenger all Challenger 1978 83 Charger non turbo FWD 1981 87 Colt all Dart FWD 2013 15 Daytona all APPENDIX A STREET Lancer Turbo GLH non turbo Intrepid Neon 2000 05 Omni Rampage Shadow all Spirit all Stealth non turbo Stratus all Eagle Summit all Talon all FWD Fiat all except X1 9 Ford Aspire Contour all Cortina Escort non ZX2 S R EXP Festiva Fiesta 1976 80 2044 1451 Fiesta ST 2014 15 Five Hundred Focus all except ST 2013 15 Fusion 4 cyl Mustang 4 cyl 6 cyl amp 4 cyl Turbo except SVO 1964 93 Pinto Probe all Taurus non SHO Tempo all Thunderbird Turbo Coupe Thunderbird V6 non S C 1989 97 ZX2 non S R Geo Metro Prizm Spectrum Storm General Motors FWD models NOC RWD V6 models NOC Fastrack News January 2015 2015 SCCA NarionaL SoLo Rules 171 STREET APPENDIX A HS CONTINUED Honda 600 800 Accord all Civic all CRX all CR Z del Sol Civic del Sol all Fit Insight Prelude all Hyundai Accent 1995 2015 Elantra 1990 2015 Scoupe Tiburon Veloster non turbo 2012 15 NOC Infiniti G20 M30 Isuzu Impulse non turbo I Mark Stylus Jaguar 120 140 150 X Type 2 5L 20
77. Class A AM Active Automatic Braking Systems ABS and Traction Control Systems are prohibited in Modified Classes D DM and E EM a Stock Tub car 18 1 C 1 may use ABS or TCS as long as it was a standard option on the car and the original unmodified control unit and programming are used Engine RPM limiting devices rev limiters are allowed in all Modi fied classes Data acquisition systems are allowed in all Modified classes unless specifically prohibited by the applicable Club Racing GCR General Competition Rules Section s Modified Category cars are divided into classes based on potential Solo performance They need not be licensed for or capable of street use The Solo Rules shall take preference over the Club Racing GCR concerning safety requirements for vehicles in this Category Aerodynamic devices must be securely mounted on the entirely sprung part ofthe car and must not be moveable when the car is in motion The use of any moving device e g a fan propeller turbine or hinged wing to create downforce is pro hibited Movable side skirts are not permitted except where noted herein or in Appendix A Modified Category 18 0 A Sound Control Modifications If a formula car or sports racer is restricted by a GCR stated exhaust length or vehicle length and therefore prohibited from installing the necessary exhaust devices to quiet the car to meet local dB limits the following shall apply The vehicle exhaust system length
78. D PREPARED CATEGORY X PREPARED XP XP vehicles must conform to the rules in Section 17 except as noted herein This class is for almost any production car using almost any automobile drivetrain Any vehicle meeting the requirements of Section 17 A 2 listed in another Prepared class specifically listed in CP DP EP or FP that is not required to run at Section 17 11 A specified weights or listed at the end is eligible for XP Section 17 11 A does not apply In excess cars per Section 17 11 A are not eligible for XP 1 BODYWORK AND STRUCTURE a Chassis components attached by removable fasteners e g bolt on sub frames may be modified or replaced without penalty b Front hoods engine covers trunk lids hatches front fenders rear fend ers not part of chassis structure unibody front amp rear fascias and side skirts may be modified or replaced and may be attached with re movable fasteners Associated hardware including latches and hinges may be modified removed or replaced Fenders may be flared as per Section 17 2 Unibody fender may be replaced as described in Section 17 2 S Non metallic fender liners may be modified replaced or re moved Body panels may be attached with removable fasteners e g Dzus c Aerodynamic Aids Wings may be added removed or modified Non OE wings may only be attached to the rear deck hatch area behind the centerline of the rear axle The total combined surface area of all win
79. E92 E93 chassis 2006 10 Chevrolet Sprint Turbo Chrysler Plymouth Dodge Eagle amp Mitsubishi Colt Turbo Daytona Laser Turbo 1984 89 Omni Turbo Shadow amp Sundance Turbo 1987 94 SRT 4 Neon chassis 2003 05 Talon amp Laser Turbo FWD amp AWD 1989 94 Conquest amp Starion Turbo Ferrari Dino 246 Dino 246 GT 308 all Honda S2000 2000 09 Isuzu I Mark RS 16V amp Turbo FWD Jaguar XKE 1961 74 6 cyl XKE 1961 74 V12 Lexus IS300 2001 05 Lotus Elise amp Exige normally aspirated 1996 2010 Mazda MazdaSpeed Prot g 2003 MazdaSpeed MX 5 Miata 2004 05 MX 6 12A Rotary no peripheral port 1988 97 MX6 GT Turbo RX 2 12A 1971 74 Specified Displacement 2292 cc Alt Spec no peripheral port RX 3 12A 1971 78 Specified Displacement 2292 cc Alt Spec No peripheral port RX 4 12A or 13B 1974 78 Specified Displacement 12A 2292 cc 13B 2616 cc Alt Spec No peripheral port RX 7 12A or 13B bridge or peripheral porting allowed 1979 85 Alt engine Renesis Specified displacement 12A 2292 cc 13B amp Renesis 2616 cc 2015 SCCA Nationat SoLo Rules 215 PREPARED FP APPENDIX A RX 7 13B bridge or peripheral porting allowed 1986 91 Alt Engine Renesis Specified displacement 13B amp Renesis 2616 cc RX 8 bridge or peripheral porting allowed Alt engines 12A or 13B Specified displacement 12A 2292 cc 13B amp Renesis 2616 cc Standard
80. EPARED ASP Acura NSX 1990 2005 Audi A4 2008 15 S4 2000 03 BMW 128 135 1 Series M 2008 13 328 335 2006 13 M3 2007 13 Z4 sDrive35i sDrive3 5is 2012 13 Z8 Bricklin Chevrolet Camaro ZL1 2012 13 DeLorean DeTomaso Mangusta all Pantera all Dodge Stealth Turbo Ferrari 250 non LM 275 308 Coupe Spider 330 365 Daytona GTB GTC 348 Ford Mustang Shelby GT500 2011 13 Jaguar E type all Mazda RX 7 1993 95 Mercedes Benz CLK 320 CLK 32 AMG SLK55 AMG R171 chassis 2004 11 182 2015 SCCA NATIONAL SoLo RuLEs Mitsubishi Lancer Evolution VIII IX 2003 07 Lancer Evolution X Ralliart 2008 13 3000GT Turbo Mitsubishi amp Eagle Eclipse Turbo amp Talon Turbo 1989 99 Nissan 370Z all 2009 13 Plymouth Laser RS Turbo AWD 1992 94 Pontiac Saturn Solstice GXP Sky Redline Porsche 911 Turbo 1976 89 911 Turbo 964 chassis 1990 94 911 Turbo 993 1996 97 911 996 997 chassis 1999 2012 Boxster Cayman all Shelby Cobra 289 Subaru Impreza WRX all incl STI 2002 14 Legacy Turbo 2004 14 amp Forester XT 2004 14 Sunbeam Tiger 260 289 Toyota MR2 all incl Turbo 1991 95 Supra Turbo 1993 98 2Fastrack News February 2015 Fastrack News April 2015 B Street Prepared BSP Audi TT 1 8T FWD amp quattro TT 3 2L quattro TTS 2009 13 Quattro Turbo Coupe BMW M Coupe M Roadster amp Z3 6 cyl all M3 E36 chassis
81. N Bop on that car in Regional Solo events OE tires must meet all require ments of Section 13 3 to be eligible for National Solo events Tires may be shaved evenly and parallel to the axis of rotation but may not otherwise be siped grooved or modified No recap and or retread tires may be used The tire must not appear on the following list which may be altered at any time by the SEB upon notification of membership No tire models are currently listed 13 4 WHEELS Any type wheel may be used provided it complies with the following A It is the same width as standard and as installed it does not have an 74 2015 SCCA NarionaL SoLo9 RULES 13 STREET offset more than 7 00 mm 0 275 from a standard wheel for the car The resultant change in track dimensions is allowed B Wheel rim diameter may be increased or decreased 1 from the stan dard part Wheel spacers are permitted provided the resultant combination com plies with the offset requirements of this Section On vehicles supplied with an OE wheel spacer the wheel spacer shall be considered as a part ofthe wheel Wheel studs lug nuts valve stems including pressure relief types and or bolt length may be changed Tire pressure monitoring sen sors may be removed Centerlock Spline Drive Knock off type hubs may be converted to lug type hubs provided the resultant combination complies with the offset re quirements of this Section 13 5 SHOCK
82. Rotary Engines 0 70 x specified displacement cc Forced Induction 0 450 x displacement cc Peripheral Port Rotary 0 050 x displacement cc AWD 0 100 x displacement cc FWD 0 100 x displacement cc Solid Drive Axle 0 05 x displacement Weight Adjustments Equipment Weight Ibs Regardless of the weight formulas above no car may weigh less than 1900 Ibs or be required to weigh more than 2700 Ibs prior to addi tion of weight adjustments defined herein and in Section 17 WEIGHT CALCULATION EXAMPLE Subaru WRX STI 2 5 L with 11 wheel width Actual displacement before overbore 2457 cc The formula would be 0 750 piston engine 0 450 forced induc tion 0 100 AWD 1 3 total weight factor Calculated weight 1 3 x 2457 3195 lbs exceeds maximum limit 2700 lbs maximum calculated weight 100 lbs wheel width over 10 weight adjustment 2800 lbs total competition weight Acura NSX 1990 2005 Alfa Romeo GTV V6 1981 86 Audi 4000 4000 Quattro Coupe Quattro Coupe 1981 87 90 Coupe 90 Quattro Coupe amp Sedan 1990 91 TT Austin Healey 3000 1959 67 100 6 1956 59 BMW 1 Series 6 cyl non turbo E82 E88 chassis 2008 10 3 Series 6 cyl 12v E30 chassis 1984 90 3 Series 6 cyl 24v E36 chassis 1992 98 Fastrack News April 2015 214 2015 SCCA Nationat SoLo RULES APPENDIX A FP PREPARED 3 Series 6 cyl all E46 chassis 1999 2005 3 Series 6 cyl non turbo E90 E91
83. SCCA National Solo Rules 2015 EDITION Sports Car Club of America Solo 6620 SE Dwight St Topeka KS 66619 800 770 2055 785 232 7228 Fax www scca com 10 6 3 Hearing The Appeal kkls u yalkd ande n da Anka adan erz akan kak ka 64 10 7 JUDGMENT OF THE APPEALS COMMITTEE 64 10 8 PUBLICATION AND EFFECT OF DECISION 64 10 9 BAD FAITH APPEALS A 65 Oh BREET 65 12 AUTOMOBILE DEFINITIONS AANEREN 65 Active Reactive Guspension Ek k kk k kk KAK AKAR 65 Anti Lock Braking System AP 65 Automobile GAN alada tette tee pron Ga eege ees 65 Blow Off Valve BOV Pop Off Valve POV eee 65 Canard a 65 CASSIS pp E 66 Closed MT 66 Compressor Bypass Valve CDN 66 Driver Passenger Compartment sese 66 DriVeltalli oui poire eb ete tl 66 Gi le el di PAN m E 9 66 gm ct rr 66 joe 66 Model ete ANA LARA ANNA 67 OPEM C aieri eessen ea eege geess 67 RolliBar Roll Cage Et 67 rore HE AA PPO 67 SNOCK Strut TOWERS c 67 Solid Rear Axle uie rrt ette ie Errare AA 67 icerum AA AALAGA nee 67 Subframe Cross Member 67 ee E EE 68 Suspension mount 68 ee 68 Te EE 68 Traction Stability Control 68 le Din EE 68 TOD ana 69 Tub based Car non tube frame cent eee eeennaeeeeeeeaeeeeeeeenaes 69 Tube Frame Car 69 Unibody Ull BOQ AE 69 Varib
84. SPECIALS Cars not otherwise classified which meet the following minimum speci fications are considered as Specials and are assigned to Modified class A AM A Bodywork 1 Must be made of metal fiberglass or other suitable fire resistant materials The sides front and back of the cockpit area must be at least as high as the driver s waist 2 Full and unobstructed access to the driver s seat must be provided 3 Firewall and floor shall prevent the passage of flame and debris to the driver s compartment Belly pans shall be vented to prevent the accumulation of liquids 4 Fenders are optional and design of same is free Sharp edges are not allowed 5 Minimum of one seat capable of supporting the driver in an upright or semi reclining position is required Location of the driver s seat is unrestricted B Chassis 1 May be of any construction deemed safe Minimum wheelbase is 72 0 182 88 cm Minimum track is 42 0 106 68 cm front amp rear Minimum wheel diameter is 10 All four wheels will be sprung from the chassis ND Di bs W N Brakes must conform to those specifications listed in Section 3 3 3 B 13 The brakes shall be a dual system arranged in a manner to provide braking for at least two wheels in the event of failure in part of the system 2015 SCCA Nationat SoLo Rules 145 18 MobirieD 7 A roll bar conforming to Appendix C is required EXCEPTION The bar must extend at least 2 0
85. achined surface on the cylinder heads only Instal lation of a spark plug hole repair utilizing standard thread repair methods e g Helicoil is permitted providing that the spark plug centerline is not changed k Complete or partial removal of any cooling duct component Re moval of the fan and the fan housing is permitted Any electric fan is permitted for cooling the engine or engine oil 1 Voltage regulator generator and or generator stand may be re moved m One or more batteries may be used n Any ignition system that utilizes a distributor for spark timing and distribution may be used Distributor shall require no modi fication to the engine for installation Internal distributor compo nents and distributor cap may be substituted 0 Valve covers are unrestricted and may be bolted on p Electric radiator engine cooling fan s may be installed 3 TRANSAXLE a Aftermarket shift forks shift rod mounting parts and alterations required for their installation is permitted with the intent of fa cilitating reliable H pattern shifting b This allowance does not include sequential shifting push button or single axis lever movement mechanisms or electric gas assist Cable hydraulic actuating mechanisms are allowed C Any primary or final drive gears of any origin may be used This does not allow the use of alternate transaxles A reverse gear is 2015 SCCA Nationat SoLo Rules 223 MoniriED CM APPENDIX
86. all M3 E46 chassis Z4 non turbo all incl M Chevrolet Corvette 1953 54 Corvette 1955 57 Corvette 1958 62 Corvette 1963 67 Corvette 1968 82 Corvette 1984 96 all Chrysler Crossfire SRT6 Honda S2000 Mazda MazdaSpeed Miata RX 7 Turbo 1986 92 Nissan amp Datsun 240Z 260Z amp 280Z 280ZX amp 280ZX Turbo 300ZX Turbo 1984 89 300ZX Turbo 1990 96 350Z all APPENDIX A STREET PREPARED Pontiac Fiero V6 Firebird Firehawk SLP 3rd gen 383cid 1990 92 Firebird Firehawk SLP 4th gen 383cid 1993 2002 Porsche 911 non turbo 1965 89 911 964 amp 993 911 non turbo NOC 914 6 all 924 all incl Turbo 944 all incl Turbo 928 968 Saleen Mustang S281E amp Mustang NOC Triumph TR 8 Volkswagen Golf R 2012 13 2015 SCCA Nationat SoLo Rules 183 STREET PREPARED APPENDIX A C Street PREPARED CSP BMW Z3 4 cyl M3 E30 chassis Datsun Roadster 1500 1600 amp 2000 Fiat Abarth all 124 Spider 1975 78 amp 2000 Spider non turbo 2000 Spider Turbo Honda Civic amp CRX 1988 91 Jensen Healey Lancia Scorpion Lotus Cortina Elite 1216cc Mazda MX 5 Miata 1990 2005 MX 5 2006 13 RX 2 amp 616 RX 3 RX 3SP amp 808 Mizer RX 7 non turbo 1978 85 RX 7 non turbo 1986 92 Mercedes Benz 190E 16v 184 2015 SCCA NATIONAL SoLo RULES Morgan 4 4 Pininfarina 2000 Pontiac amp Saturn Solstice amp Sky Porsche 3
87. all 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 used shall be of of the same configuration number of valves per cylinder and valve actuation method OHV or OHC as the original and shall be direct re placement 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 Sec tion 17 2 E The firewall between the engine compartment and driver passenger compartment may be replaced but must be in approximately the same lo cation 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 clear ance The bulge may open to the front to the rear or to either
88. are permitted Wheel studs and knock off wheel drive pegs may be changed in length and diameter Wheel bolts may be re placed with studs and nuts 15 5 SHOCK ABSORBERS Vehicles may only exceed the allowances of Section 13 5 as specified here in A Shock absorber bump stops may be altered or removed B On cars with lever type shock absorbers a tube type shock absorber may be added If the lever type shock serves no other purpose it must be removed If the lever type shock serves any other purpose it must be retained C Any shock absorbers may be used Shock absorber mounting brackets which serve no other purpose may be altered added or replaced provid ed that the attachment points on the body frame subframe chassis suspension member are not altered The installation may incorporate an alternate upper spring perch seat and or mounting block bear ing mount The system of attachment may be changed The number of shock absorbers shall be the same as standard No shock absorber may be capable of adjustment while the car is in motion unless fitted as orig inal equipment MacPherson strut equipped cars may substitute struts and or may use any insert This does not allow unauthorized changes in suspension geometry or changes in attachment points e g affecting 96 2015 SCCA NarionaL SoLo RULES eu February 2015 3Fastrack News March 2015 15 SrREET PREPARED the position ofthelower ball joint or spindle Itis intended to all
89. arionaL SoLo Rules 117 17 PREPARED 1 It is a production rear spoiler which is standard or optional equip ment of a US model of the vehicle or an exact replica in an alternate material 2 It is a non production rear spoiler which is mounted to the rear por tion of the rear hatch deck or trunk lid The spoiler may extend no more than 10 0 25 4 cm from the original bodywork in any direc tion Alternatively in a hatchback the spoiler may be mounted to the rear hatch lid at or near the top of the hatch in such a configuration the spoiler may extend not more than 7 inches 7 50 19 1 cm from the original bodywork in any direction The spoiler may be no wider that the bodywork The use of endplates is prohibited Spoiler endplates are defined as any vertical or semi vertical surfaces at tached in front of the spoiler which have the result of capturing and redistributing air downforce along all or any portion ofthe spoiler The angle of attack is free The spoiler may not function as a wing 3 All OE rear wings and rear spoilers may be removed 4 Vehicles equipped with an OE rear wing may add a rear spoiler only if the OE wing and wing attachments are first removed Q The fuel tank may be modified replaced or relocated If the fuel tank is modified or replaced the following restrictions apply 1 No part of the fuel tank or fuel cell shall be closer than 6 0 15 2 cm to the ground unless enclosed within the bodyw
90. as allowed herein Hardware may be added to the steering system outside the passenger compartment to limit steering travel provided it doesn not alter steer ing or suspension geometry within the limited range of motion and serves no other purpose B Factory rub strips emblems mud flaps rear wings and or spoilers may be removed C Strut bars per Section 12 18 are permitted with all types of suspen sions subject to the following constraints 1 A 2 point strut bar may be added removed modified or substituted but only with another two point strut bar 2 Atriangulated 3 point strut bar may be removed modified or sub stituted substitution may be with either a triangulated or a 2 point strut bar The connection to the chassis i e firewall bulkhead must be in the standard location Lower suspension braces must be attached to the lower suspension pickup point locations on the chassis within two inches 2 50 8 mm in any direction of the actual suspension attachment to the chassis 4 Except for standard parts no connections to other components are permitted Ww Additional holes may be drilled for mounting bolts Interior trim panels may be modified to allow installation of strut bars Holes or slots may be no larger than necessary and may serve no other purpose This does not permit any modifications to the frame or unibody beyond the al lowed mounting holes D Subframe mount bushings may be replaced b
91. ay attach to the belly pan but is not required to do so Splitter endplate mounting location may be at the outside lateral end or inboard of the outside lateral end of the splitter Additional mounting plates or strakes may be added inboard of the end plates but these must be no larger than the endplates e A front splitter and its associated features shall not function as a diffuser f An OE splitter which does not conform to these requirements may be used unmodified on the original make and model 4 Rear spoilers a Ifa rear spoiler is used it shall be mounted to the rear hatch deck or trunk lid and mount no further forward than the base of the rear window The spoiler extension for the entire spoiler is set by one measurement at the lateral midpoint of the car At that point the spoiler may not extend more than 10 0 25 4 cm from the 142 2015 SCCA NATIONAL SoLo RULES 18 MobiFIED attachment point out to the outer or free edge This sets the max imum height above ground at all other locations on the spoiler The result may be a flat topped rather than contoured spoiler Alternatively the spoiler may be mounted at the rear of the roof or to the rear hatch lid at or near the top of the hatch in such a configuration the spoiler may extend no more than 7 5 19 1 cm from the original bodywork measured as described above The spoiler angle of attack is free The rear spoiler is measured from leading attach
92. ay be replaced with the follow ing restrictions The seating surface must be fully upholstered The top of the seat or an attached headrest may not be below the center of the driver s head The seat including mounting hardware must weigh at least 25 pounds and must be attached using the OE body mounting holes studs Additional mounting points may be added C Factory rub strips emblems mud flaps bolt on front valance lips spoil ers and fog lights except those integral to a headlight or turn signal may be removed Rear wings may be removed so long as the vehicle retains any federally mandated third brake light D Alternate steering wheels are allowed except that steering wheels with an integral airbag may not be changed E Fenders may not be cut or flared but the inside lip may be rolled to gain additional tire clearance The outer fender contour may not be changed Plastic and rubber wheel well splash shields may be modi fied for tire clearance and to accommodate a rolled inside fender lip The modifications may serve no other purpose e g air intake brake ducts etc No other changes to the standard fenders or wheel wells are permitted F Addition of spoilers splitters rear wings bumper covers valances side skirts and non functional sccops vents is allowed provided that either 1 It is a production part which is standard or optional equipment of a US model of the vehicle Model is defined in Section 12 2 I
93. bricating system but may have any oil pan Accusump type systems allowed oil pump and pickup oil cooler s or oil or fuel filters Fuel filters must be of automotive type and may serve no other purpose a substituted fuel filter may not be used as a reservoir Substituted fuel filters may not exceed one quart total capacity A permitted oil cooler may be positioned in an opening in an allowed spoiler provided no unauthorized modifications are made in order to perform the installation Any power steering fluid cooler may be added B Heat shields may be added C Induction allowances are as follows 1 Carburetors fuel injection and intake manifolds are unrestricted subject to Section 15 10 D Alternate throttle linkage and connec tions to facilitate installation of allowed induction systems are per mitted but may serve no other purpose If an induction system item is allowed to be removed and its original mounting bracket can be removed by simply unbolting it the bracket may be removed as well 2 Except for standard parts as defined in these rules the external use while on course of liquids ice dry ice refrigeration systems vapor ized compressed gases etc to reduce the temperature of the intake air charge is prohibited Wrapping of intakes with liquid soaked fab ric is not permitted 3 As utilized only on engines originally equipped with forced induc tion induction charge heat exchangers also known as intercool ers or
94. caster may be adjusted by modification or replace ment of existing brackets which locate control pivots and bolt to the chassis or subframe structure Any resulting change in the vertical position of the pivot points must remain within 1 0 25 4 mm of the original location C Steering 1 Steering arms pitman arms steering racks gears and steering link age component parts may be modified reinforced or substituted Power assist steering components may be added removed or modi 122 2015 SCCA NATIONAL SoLo RuLes 17 PREPARED fied The steering system may be relocated or changed 2 The steering column is unrestricted A collapsible type steering col umn having a layout and design and or a column structure with im pact and energy absorbing characteristics is strongly recommended 3 Any steering wheel and wheel quick release mechanism may be used Steering wheel rake and steering column length may be al tered Steering quickeners may be added to the steering column D All spherical rod ends used on major suspension and steering compo nents shall be retained either by the design of the mounting brackets a larger area captive washer or the inherent mechanical design of the unit circlip or Messerschmitt joints 17 9 ELECTRICAL SYSTEM A The use of any driver operated electric starter is permitted B The use of any ignition system except magneto ignition is permitted provided the number of spark plugs rema
95. cated except where specifically permitted Reinforcing does not authorize the use of underbody or belly pans for ward of the firewall or aft of the front edge of the rear wheel opening It is permitted to have jack points recessed into the rocker panels or to have one tube per side extending downward through the bottom of the door provided they do not extend beyond the overall width of the car or in an unsafe or dangerous manner No part of the bodywork or chas sis to the rear of the front wheel opening shall touch the ground when both tires on the same side of the car are deflated C The chassis frame or subframe may be notched or cut and brackets may be added for the purpose of attaching alternate suspension steering or drivetrain components except that the firewall may not be modified for engine block or cylinder head clearance Holes may be cut to provide clearance for authorized suspension steering and drivetrain compo nents through their entire range of travel Clearance between the modi fied chassis frame or subframe and the suspension steering and drive train components is not to exceed 4 0 101 6 mm Additional structure may be added in order to attach allowed components to the chassis Relocation notching or cutting of the chassis frame or subframe for tire clearance or moving the wheels inboard is not allowed Replacement of inner fenders or wheel wells to enable wider wheels and tires is allowed D Replacement of a
96. cifications In such a case the replica is considered legal for Prepared provided it correctly meets all of the applicable GCR specifications The 1096 increase in minimum weight does apply to such cars B Weight Calculations Where there is a percentage addition as well as a specific weight ad dition the percentage is added to the base weight before the specific weight addition Examples 1 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 Ibs 875 lbs 1200 lbs 2075 lbs 2 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 2015 SCCA Nationat SoLo Rules 131 17 PREPARED 2700 lbs x 1 10 2970 lbs C Data acquisition recording systems are permitted D Except where there are specific requirements in these rules any safe line for fuel hydraulic fluids oil water or breather is allowed 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 F All cars may have towing eyes hooks or straps which do not danger ously protrude from the bodywork G Removal of or modification to heating ventilation air conditioning wiper washer audio security communicat
97. ck News March 2015 Fastrack News April 2015 G STREET CLASS GS Acura RSX Type S Audi A4 V6 amp 4 cyl Turbo A6 V6 NOC amp 4 cyl A8 amp V8 quattro AWD Quattro Coupe Turbo BMW 320i F30 F31 F34 2014 15 323i Convertible 323is 328i Convertible amp 328is E36 1999 3 Series 6 cyl non M3 E30 E36 1984 98 Cadillac ATS 2 5L 4 cyl non turbo 2013 15 Chevrolet Cobalt Sport 2 4L 2008 Cobalt SS 2 0L SC 2005 07 Cobalt SS 2 4L 2006 07 Malibu all 2008 15 Chrysler Conquest Turbo PT Cruiser Turbo 2003 09 Dodge Caliber SRT4 Charger V6 2006 15 Conquest Turbo Neon 1995 99 SRT 4 Neon chassis Fiat 500 Abarth 2012 15 Ford Focus ST 2013 15 Fusion 6 cyl Mustang V6 1994 2010 Mustang SVO Taurus SHO 1989 99 2010 15 ZX2 S R 1999 2003 General Motors FWD models 4 cyl Turbo 6 cyl Ecotec or Quad 4 engines NOC Hyundai Genesis Coupe 4 cyl Turbo 2010 12 APPENDIX A STREET Veloster Turbo 2012 15 Isuzu Impulse Turbo all Kia Forte amp Forte Koup 2 4L Lexus SC 300 1992 2000 Mazda 323 GT Turbo sedan 323 GTX Turbo AWD Mazdaspeed3 Mazdaspeed Prot g Mercedes 190E 6 cyl 2 6L amp 4 cyl 16v C230 1999 2007 Merkur XR4Ti MINI Cooper Hardtop non S non JCW 2014 15 Mitsubishi Galant V6 amp 4 cyl Turbo Starion Turbo Plymouth Neon 1995 99 Saab 9 2X Linear 2 5L Turbo models NOC Saturn ION Redline Turbo Subaru Impre
98. ction 17 Prepared Category and the specifications listed below Permitted optional carburetors for single carburetor cars are A Weber 32DGV 32DGAV or 32DGEV B Weber 32 36DGV 32 36DGAV or 32 36DGEV C Weber 32 36DFV 32 36DFAV or 32 36DFEV D Weber 34DAT 34DATR 34DATRA or 34DMTR E Holley Weber 5200 MAKE MODEL VALVE SIZE IN EX MAX IN ENGINE DISPLACEMENT INDUCTION ADDITIONAL SPECIFICATIONS Ford Fiesta 1978 80 1 41 1 24 1598 cc 1 40DCN 40DCNE or 40IDF Comp ratio to 11 0 1 valve lift to 0 450 Festiva 1988 93 1 26 1 10 1324 cc Fuel Inj or Carb Comp ratio to 10 5 1 valve lift to 0 450 2015 SCCA NarionaL SoLo9 Rules 211 PREPARED EP APPENDIX A Geo Metro 13BA 1989 94 1 42 1 18 1298 cc Fuel Inj Comp ratio limited to 11 0 1 valve lift to 0 450 Honda Civic Civic Si CRX amp CRX Si 1984 87 1488 cc 1 07 1 30 Fuel Inj or Carb Comp ratio to 11 0 1 valve lift to 0 390 Civic all amp CRX all 1988 91 1 14 0 98 1493cc Fuel Inj Comp ratio to 11 0 1 valve lift to 0 390 1590cc Comp ratio to 11 0 1 valve lift to 0 390 Renault Alliance Encore 1984 87 1 50 1 28 1721 cc Fuel Inj Comp ratio to 10 5 1 valve lift to 0 450 Suzuki Swift GA 1989 94 1 42 1 18 1298 cc Fuel Inj Comp ratio limited to 11 0 1 valve lift to 0 450 Volkswagen Golf GTI GT GL non turbo 1 57 1 30 1780 cc Fuel Inj Comp ratio to 11 5 1 valve lift to 0 420 Jetta 85 791 1 57 1 30 1780 cc Fu
99. cyl amp 6 cyl G5 all G8 V6 2008 09 LeMans FWD 1988 93 Sunfire T 1000 Vibe Porsche 356 non Carrera 912 924 Audi engine Renault NOC Saab 900 V6 1994 97 NOC Saturn 8v Astra 2008 09 DOHC model NOC Ion non turbo L series all Scion tC incl Release Series 5 0 2009 2005 15 xA 2004 06 xB 2008 12 Shelby Charger non turbo Subaru Impreza 2 0i Impreza NOC Legacy NOC SVX Sedan Turbo NOC NOC Sunbeam Alpine Suzuki Esteem GL Forenza 2015 SCCA NarionaL SoLo Rules 173 STREET APPENDIX A HS CONTINUED Kizashi 2010 13 Swift SX4 sedan 2007 13 Toyota Camry all Celica FWD NOC Celica all non AWD 1971 99 Corolla Cressida Echo Matrix Paseo Prius all Starlet Supra non turbo 1979 92 Tercel Yaris Triumph all except Stag Volkswagen air cooled engine all diesel engine non turbo all Beetle 2 0L Dasher Fox Golf GTI amp Jetta 16v non turbo Golf GTI amp Jetta 8v all Golf TDI Jetta 2 5L 2005 14 Jetta TDI 2005 06 2009 15 New Beetle NOC Passat 4 cyl non turbo amp V6 Quantum Rabbit amp Rabbit GTI all NOC Rabbit 2007 09 Scirocco all VR6 FWD NOC Volvo C30 NOC Yugo all RWD pickup trucks NOC Fastrack News January 2015 174 2015 SCCA NATIONAL SoLo RULES Super STREET R cLass SSR This class combines high perfor mance production cars with the highest performance DOT tires All rules
100. d similar operations performed in order to facilitate the installation of allowed parts or modifications Mi nor strengthening without relocation of original chassis suspension pickup points is allowed Examples include welding washers restricting control arm mounting bolt movement local reinforcement of control arm chassis mounts etc Competitors are strongly cautioned to make the minimum amount of modification required to affix a given part and to not make unduly tor tured interpretations of this rule Modifications to the firewall in order to allow for increased engine setback and any modification that chang es the location of a suspension pickup point are explicitly forbidden Plastic under trays and covers below the vehicle may be removed or modified as necessary to facilitate other compliant modifications but not added or enlarged Q Ballast may be added Ballast must be a maximum of 50 lbs per seg ment It must be securely mounted within the bodywork R OE side mirrors may be replaced by aftermarket units provided they mount in the same location perform the same function as the OE mir rors and have a reflective surface area greater than 15 sq in 96 8 cm per mirror S OE pop up headlights may be replaced with static headlights pro vided the replacement units are intended for automobile use on pub lic roads as a primary means of illumination and retain high and low beams as originally provided by the manufactu
101. dge amp Mitsubishi Colt Turbo amp Mirage Turbo 1984 88 Colt Turbo amp Mirage Turbo 1989 92 Eagle Summit Turbo 16v 1989 90 Fiat 500 Abarth 2012 13 Ford amp Mercury Capri 4 cyl amp 6 cyl 1971 77 Capri 1991 95 Contour SVT Cougar 1999 2002 Focus ST 2013 15 Fusion amp Milan 6 cyl 2006 13 Probe Turbo amp V6 Honda Civic Si 1999 2000 Civic Si 2002 05 Civic Si 2006 12 Del Sol DOHC Prelude 4WS Prelude 1992 2001 NOC Hyundai Tiburon Isuzu I Mark LS 16v amp Turbo FWD 1985 89 I Mark RS 16v amp Turbo FWD Impulse RS Turbo AWD 1990 93 Impulse Turbo amp RS RWD 1983 89 Impulse XS 16v non turbo 1990 93 Impulse 16v amp Turbo Stylus XS amp RS 16v 1990 93 Kia Forte Koup 2010 12 Lexus IS 300 Fastrack News April 2015 2015 SCCA Nationat SoLo Rules 185 STREET PREPARED APPENDIX A DSP coNTINUED Maserati BiTurbo Mazda 323 GT amp GTX AWD Mazda6 6 cyl MazdaSpeed3 MazdaSpeed Protege MX 6 Turbo amp V6 RX 8 Spec Miata See 15 0 for prepara tion allowance requirements Mercedes 190 all 1984 93 C230 Merkur XR4Ti MINI Cooper S all including JCW amp 2006 JCW GP except Country man Mitsubishi Cordia Turbo Eclipse 2000 12 Galant all Tredia Turbo Nissan amp Datsun 200SX Turbo 200SX V6 240SX Altima 2007 13 Maxima Pulsar 16v Pulsar NX Turbo Sentra 2 0L 2000 01 Sentra B15 chassis 2002 06 S
102. e shift linkage h Non OE replacement bodies are allowable for the Factory Five Road ster Challenge Car and Superformance MKIII Replacement bodies must not confuse the identity ofthe vehicle i Minimum track width is 55 139 7 cm WHEELS Any size wheel may be used Wheel size does not affect minimum weight SHOCK ABSORBERS AND SPRINGS a Section 17 5 B which restricts the type of shocks authorized by 17 5 C 3 does not apply b Active reactive suspension systems incur a minimum weight adjust ment including standard parts BRAKES Anti lock braking systems ABS may be added replaced removed or modified The use of ABS including original equipment incurs an ABS weight adjustment ABS providing traction and or stability controlin any form will also incur a traction stability control weight adjustment SUSPENSION CONTROL Any front and rear suspension system type MacPherson Chapman strut double A arm live axle etc may be used ELECTRICAL SYSTEM Any ignition system is permitted The number of spark plugs may be changed 196 2015 SCCA NATIONAL SoLo RULES APPENDIX A XP PREPARED 7 ENGINE AND DRIVETRAIN a Engines must be derived from production automobiles Motorcycle snowmobile marine or other engines of non automobile design are not permitted b Drivetrain and related systems e g induction ignition fuel electrical cooling oiling and components e g mounts clutch flywheel a
103. e wing mounting area may be used but may serve no other purpose Body panels to which a wing mounts must remain functional e g trunk lids and rear hatches must open Wing endplate surface area is limited to 200 sq in 1290 3 cm each and limited to a maximum of 2 Except for standard parts wings designed to be adjustable while the car is in motion must be locked in a single position Canards are allowed and may extend a maximum of 6 0 152 4 mm forward of front bodywork fascia as viewed from above No portion of the canard may extend past the widest part of the front bodywork fascia as viewed from above Canard area will be measured in the same manner as wings using Section 12 10 Canard area may not exceed 15 of total wing allowance The sum of canard area and rear wing area may not exceed the total wing allowance M Front splitters are allowed and shall be installed parallel to the ground within 3 fore to aft and may extend a maximum of 6 0 152 4 mm from the front bodywork fascia as viewed from above Splitters may not extend rearward past the centerline of the front wheels No portion of the splitter may extend beyond the widest part of the front bumper fascia as viewed from above N Removable OE hardtops T tops targa tops sunroofs moonroofs and similar roof mounted panels may be removed replaced with alternate panels provided that the area of interface is limited to the original pe rimeter of the t top sunr
104. ed edge to trailing or outermost free edge Its measurement is independent of its angle of attack b The spoiler may not be wider than the rear bodywork measured asthe maximum distance between the outside edges ofthe wheel well openings or fender flares at axle height c Aerodynamic aids permitted in Section 18 1 F shall not function as wings Therefore the spoiler may not overhang the bodywork such that air passes both over and underneath it If the rear spoil er overhangs the side of the car the lower edge of the spoiler shall be supported by bodywork that will prevent air from pass ing underneath the spoiler This may be accomplished by extend ing the spoiler to join the bodywork or wheel opening fender flare beneath the overhang 5 Diffusers are allowed at the rear of the car only and shall have no more than 25 0 63 5 cm front to back of expanding chamber Vanes or strakes are allowed inside the diffuser A diffuser is defined as an expanding chamber between the vehicle and the ground for the purpose of accelerating air ahead of it to develop low pressure The diffuser may protrude rearward beyond the top view outline of the car Closed undersides or belly pans lower surface are permit ted The entire length of the underbody may be closed off to permit proper airflow to a rear diffuser or to smooth the underside of the car The belly pan shall be flat within 1 0 25 4 mm total devia tion No tunnels or other underbody aerody
105. ed slip or locked is permit ted Final drive units which permit gear ratio changes while the car is in motion are prohibited 3 Any drive axle shafts bearings bearing carriers hubs and universal CV joints may be used 4 Loops may be installed to prevent the driveshaft from contacting the ground in the event of driveshaft and or U joint failure 5 LEVEL 1 PREPARATION FULL PREP VEHICLES Any axle tube or final drive housing is permitted 6 LEVEL 2 PREPARATION LIMITED PREP VEHICLES Substitution of the differential housing is only permitted on front engine front drive or rear engine rear drive cars through the use of an alternate trans 130 2015 SCCA Nationat SoLo RULES 17 PREPARED axle R All engine crankcase and radiator overflow breather lines shall termi nate in containers of at least 1 qt 0 95L capacity These containers cannot be vented into the driver passenger compartment 17 11 OTHER A 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 their respective Prepared classes Tube frame production cars and kit cars specifically listed in Appendix A e Shelby Cobra are subject to the requirements in the relevant Appendix Tube frame versions of Production Vehicles ie a tube frame Camaro are considered in excess of the rules and must comply with the requirements in this Section Section 17 8
106. edges of the wheel well openings or fender flares at axle height The total fore to aft curvature or deviation of the rear spoiler mea sured at the trailing edge shall not exceed 10 0 254 0 mm as viewed from above The front spoiler may not function as a wing and therefore must be installed such that air does not pass both over and underneath it This may be accomplished by ensuring that the upper edge of the spoiler is in complete continuity with the bodywork above the spoiler New bodywork may be added to close the gaps between the fenders nose and spoiler splitter airdam assembly on cars with open or irregular front bodywork such as the Ford Model T MG TD Morgan and Lotus 7 When these or similar vehicles use a full width front spoiler the car s spoiler airdam is required to be vertical between 80 100 for the lower 8 0 20 3 cm of its extent The change in top view outline caused by these bodywork changes is allowed Front splitters are allowed but must be installed parallel to the ground within 1 0 25 4 mm fore to aft Splitters may not be wider than nor extend more than 6 0 15 2 cm forward of the top view outline of the car The splitter must be a single plane with the top and bottom surfaces parallel with an overall height of 1 0 24 5 mm or less The leading edge of the splitter may be rounded the radius area may extend backwards no more than the splitter thickness The bottom of the splitter m
107. eel weight greater than 51 25 lbs per liter Solid axle RWD 25 lbs per liter Tire width 275 mm or less all 200 lbs Regardless of the weight formulas above no car will be required to weigh more than 3100 lbs Super STREET Monrriep Cass SSM ELIGIBLE VEHICLES All two seat cars not excluded below All SM eligible sedans coupes excluded from SM All SM eligible vehicles EXCLUDED VEHICLES Lotus all except Elise Exige amp Esprit Vehicles not meeting minimum weights MINIMUM WEIGHT CALCULATIONS WITHOUT DRIVER FWD 1350 lbs 125 lbs per liter RWD 1600 lbs 200 lbs per liter AWD 1600 lbs 300 lbs per liter Supercharged or Turbocharged SSM engines Add 1 4L to the actual displacement Rear wheel weight greater than 51 25 lbs per liter Tire width 275 mm or less all 200 lbs Regardless of the weight formulas above no car will be required to weigh more than 2900 lbs STREET MopiriED CLAss Front WHEEL Drive SMF ELIGIBLE VEHICLES All FWD vehicles MINIMUM WEIGHT CALCULATIONS WITHOUT DRIVER 1750 lbs 125 lbs per liter Supercharged or Turbocharged SMF engines Add 1 0L to the actual displacement Regardless of the weight formulas above no car will be required to weigh more than 3100 lbs Cars running in SMF using tires with a nominal width of 275 mm or less will NOT receive the weight adjustment as stated in the SM class 194 2015 SCCA NATIONAL SoLo RuLEs APPENDIX A XP PREPARE
108. el Inj Comp ratio to 11 5 1 valve lift to 0 420 Rabbit 81 84 1 34 1 22 1715 cc Fuel Inj Comp ratio to 11 0 1 valve lift to 0 450 Rabbit GTI 8v 83 84 1 57 1 30 1780 cc Fuel Inj Comp ratio limited to 12 0 1 valve lift to 0 420 Rabbit 1 34 1 22 1588 cc 1 40DCN or 40DCNF w 32mm chokes or Fuel Inj Comp ratio to 11 0 1 valve lift to 0 450 212 2015 SCCA Nationat SoLo RULES APPENDIX A EP PREPARED Scirocco 81 84 1 34 1 22 1715 cc Fuel Inj Comp ratio to 11 0 1 valve lift to 0 450 Scirocco 8v 83 88 1 57 1 30 1780 cc Fuel Inj Comp ratio to 12 0 1 valve lift to 0 420 Scirocco 1 34 1 22 1457 cc 1471 cc 1457 1 40DCN 40DCNE or 40IDF w 32mm chokes or Fuel Inj 1471 1 40DCN 40DCNF or 40IDF w 32mm chokes Comp ratio to 11 0 1 valve lift to 0 450 Scirocco 1 34 1 22 1588 cc 1 40DCN or 40DCNF w 32mm chokes or Fuel Inj Comp ratio to 11 0 1 valve lift to 0 450 2015 SCCA Nationat SoLo Rules 213 PREPARED FP APPENDIX A F PREPARED FP Wheel size allowances are as per Section 17 4 Minimum weights are determined by engine displacement Increases in engine displacement resulting from legal overbore are not considered in these calculations Wheels up to 10 wide are allowed with no weight increase a maximum width of 12 is permitted Wheels greater than 10 up to 12 wide will re ceive an increased weight of 100 Ibs WEIGHT FORMULAS LBS Piston Engines 0 75 x displacement cc
109. ely aesthetic and or acoustic function J Any engine or transmission mount is allowed provided it attaches only to the original mounting points does not relocate the engine trans mission other than incidental to changes in compliance material and weighs no less than the OE mount All components between the engine transmission and the mounting structure are considered to be part of the mount assembly K Limited Slip Differentials STS STF No limited slip differentials are permitted except for factory standard viscous coupler type units STX STU STR Only standard as defined in Section 12 limited slip differentials LSD are allowed on AWD vehicles For AWD vehicles that did not come with any type of limited slip differential including center differential or transfer case a single aftermarket mechanical LSD may be added 2WD vehicles may use any mechanical LSD unit 14 11 OUT OF PRODUCTION CARS Where a car is out of production and the manufacturer is either out of business stocks no parts or no longer has a required part a part of any origin but as similar as possible to the original may be substituted The entrant must be prepared to show documentary evidence that one of the three circumstances above applies and that the substituted part is as simi lar as possible under the circumstances Substitute parts which provide improvements in performance e g superior gearing lighter weight bet ter camshaft profile etc are n
110. emain standard except that alter nate cam drive pulleys or gears may be used to adjust cam timing if no variable cam and or valve timing system exists as standard Timing covers or valve covers may be altered for pulley clearance or access to adjustment Type of cam drive chain belt gear must remain as standard Alternate parts of the same general type e g roller chain in 104 2015 SCCA NATIONAL SoLo RuLEs 15 SrREET PREPARED place of silent chain may be substituted Mating parts block heads covers retainers etc may not be altered except as mentioned above Vehicles equipped with a variable cam and or valve timing system as standard may use alternate computer calibration to adjust cam and or valve timing but may not change or substitute cam drive components hardware AA Upper engine shields made of plastic material the purpose of which is to hide mechanical components in the engine compartment may be removed if they have a solely aesthetic and or acoustic function BB Cruise control systems may be removed in whole or part 15 11 OUT OF PRODUCTION CARS Where a car is out of production and the manufacturer is either out of business stocks no parts or no longer has a required part a part of any origin but as similar as possible to the original may be substituted The entrant must be prepared to show documentary evidence that one of the three circumstances above applies and that the substituted part is as simi
111. engines are not permitted May use any automobile based 2v cyl engine up to 1300 cc any 2 stroke motor up to 900 cc any 4v cyl or more engine up to 1005 cc Minimum weight with drive nus nnn ri k dinak 1020 Ibs May use any 2v cyl automobile based production engines up to 1615 cc Minimum Weight with driver EEN 1110 lbs May use any 4v cyl or more engine up to 1615 cc May use any 2 stroke up to 1300 cc Mazda 12A rotary with any porting and any carburetion May use fuel injection without weight penalty as re quired by the GCR Minimum weight with drivers dika nit nakak 1180 lbs May use any engine up to 3000 cc Minimum weight with driver reee 1285 lbs Minimum rim Width citet at ient ien s none Maximum allowed rim width ENEE 15 in D Formula 2000 and Formula Continental per GCR FCS 1 2 3 Minimum weight with driver re EE unrestricted Airfoil maximum size per Formula Atlantic rules E Aerodynamic restrictions for Sports Racers The total area when viewed from the top of all wings shall not exceed 8 sq ft The 2013 GCR CSR DSR 45 flat bottom rule and all other aero specifications shall also apply to ASR Production cars as recognized in 2015 SCCA Nationat SoLo Rules 219 MoniriED CM APPENDIX A DM EM running in BM as sports racers must have the tires as viewed from above at least half covered Cycle fenders may be u
112. ensor in order to affect the ECU PCM operation of en gine management system EXAMPLE Fuel controllers that modify the signal coming from an airflow sensor Ww 4 Fuel pressure regulators may be replaced in lieu of electronic altera tions to the fuel system It is not permitted to electronically modify the fuel system AND replace a fuel pressure regulator 5 Ignition timing may be setatany point on factory adjustable distribu tor ignition systems 6 VTEC controllers and other devices may be used which alter the tim ing of factory standard electronic variable valve timing systems G Any mechanical shift linkage may be used 88 2015 SCCA Nationa SoLo9 RULES 14 STREET TOURING H Any accessory pulleys and belts of the same type e g V belt serpen tine as standard may be used This allowance applies to accessory pulleys only e g alternator water pump power steering pump and crankshaft drive pulleys It does not allow replacement modification or substitution of pulleys cogs gears or belts which are part of cam layshaft or ignition drive or timing systems etc Any crankshaft damp er or pulley may be used SFI rated dampers are recommended Super charged cars may not change the effective diameter of any pulley which drives the supercharger I Upper engine shields made of plastic material the purpose of which is to hide mechanical components in the engine compartment may be re moved if they have a sol
113. entra B16 chassis 2007 12 Peugeot 505 all 1979 91 Pontiac amp Toyota Corolla XRS 2005 06 Matrix XRS 2003 06 amp Vibe GT 2003 06 Matrix amp Vibe AWD 2003 08 Porsche 914 4 cyl 186 2015 SCCA NATIONAL SoLo RuLEs Renault Fuego Turbo R5 Turbo Saab 99 99 EMS amp 99 Turbo 900 amp 900 Turbo 1979 93 900 amp 900 Turbo 1994 98 Saturn Ion all amp NOC Subaru Impreza all 1993 2001 Impreza 2 5L NOC Legacy amp Outback 6 cyl all 1998 2004 Legacy amp Outback 6 cyl all 2005 13 Toyota Camry V6 Celica 2000 05 Celica All Trac all Corolla FX16 Supra 1979 81 Supra 1982 86 Volkswagen Golf Jetta amp New Beetle 1 8T Mk4 chassis 1999 2005 Golf GTI GLI amp Jetta 2 0T 2006 13 New Beetle Turbo Passat VR6 R32 Volvo 240 Series Turbo all C30 2006 09 40 1995 2004 40 2005 11 6 cyl n a amp 4 cyl mechanically forced induction 2WD sedans un der 3 0L not otherwise classified See Section 15 1 C for update back date limitations Fastrack News April 2015 E Street PREPARED ESP AMC AMX amp Javelin all Audi 5000 Turbo 5000 Turbo quattro 200 amp 200 quattro A8 amp A8 quattro RS4 2007 08 V8 quattro BMW 2500 amp 2800 all 3 0S amp CS all 528 530 amp 533 non turbo 633i amp 733i all Chevrolet Pontiac Buick amp Oldsmo bile Camaro amp Firebird 1967 70 Camaro amp Firebird 1970 81
114. enum chamber is permitted b There shall be no mixing of allowances e g carburetors from 1 above and displacement from 2 above 2 ENGINE COMPONENTS a Mixing of parts between different air cooled engine models is permitted All parts must meet VW specifications for engines de livered for use in the US in VW vehicles unless otherwise noted herein b Balancing of all moving parts is permitted provided balancing does not remove more material than necessary to achieve bal ance C Parts from alternate manufacturers or remanufactured parts are permitted provided said parts are of the same material are di mensionally identical and meet all original VW specifications for engines delivered for use in the US in VW vehicles This would include VW replacement heads as specified without raised ports and aluminum engine cases Aftermarket magnesium engine cas es may also be substituted d The flywheel from either the alternate engine or from the 1200 cc engine may be used Minimum flywheel weight is 12 lbs Any single disk clutch may be used The transmission housing may be machined to provide clearance when using the alternate engine flywheel assembly e Any exhaust system which terminates more than 3 7 62 cm be hind the rearmost part of the body may be used f Counterweighted crankshaft and 8 dowel pinned crankshaft to flywheel mounting are allowed All journal dimensions and rela tionships with each other must remain as
115. er is 1200 1 796 x 1 4 x 200 20 1753 lbs ENGINE DISPLACEMENT LESS THAN 4 0L 1200 lbs 150 lbs per liter 1200 lbs 200 lbs per liter 1200 lbs 250 lbs per liter ENGINE DISPLACEMENT OF 4 0L OR GREATER 1200 lbs 130 lbs per liter 1200 lbs 180 lbs per liter 1200 lbs 250 lbs per liter 2015 SCCA Nationa SoLo Rules 197 PREPARED XP APPENDIX A Regardless of the weight formulas above no car shall be required to weigh more than 2300 lbs before applicable weight adjustments Cars with traction stability control Cars with active reactive suspension Cars with engine behind driver 20 per liter c Regardless of the Minimum Weight Calculations above b no car with a supercharged or turbocharged engine shall weigh less than the follow ing minimum weights Ibs FWD Factory Five All with a minimum engine size of 4 5 L normally aspirated or the equivalent forced induction engine size and weight Roadster amp Challenge Car Type 65 Coupe Mosler All with a minimum engine size of 6 0 L normally aspirated or the equivalent forced induction engine size and weight MT900S MT9OOR XP Noble All with minimum engine size 2 9 L with forced induction or 4 1 L normally aspirated M12 M12GTO M400 Rossion With minimum engine size 2 9 L with forced induction or 4 1 L nor mally aspirated Q1 Shelby Cobra 1963 67 Superformance All with a minimum engine size of 4 5 L normally aspira
116. erial removal is restricted to the amount necessary to achieve the maximum factory alignment specification 13 9 ELECTRICAL SYSTEM A The make of spark plugs points ignition coil and high tension wires 2015 SCCA NATIONAL SoLo Rules 77 13 STREET is unrestricted including spark plug wires having an in line capacitor Substitution or addition of ignition coil mounting brackets is permitted provided they affix to the original standard location and serve no other purpose Modification of the distributor cap for the purpose of install ing allowed non standard components is not permitted B On cars made prior to January 1 1968 any ignition system using a stan dard distributor without modification may be used C Ignition settings may not be adjusted outside factory specifications D No changes are permitted to electronic engine management systems or their programming E Additional battery hold down hardware may be added to supplement the standard equipment in order to meet Section 3 3 3 B 18 Safety In spections Requirements It may serve no other purpose E Tire pressure monitoring systems TPMS may be disabled Altering the signal to the TMPS is permitted 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 al tering the inputs to the ESC TC processor e g
117. ern is permitted Driveshafts may be made of any material deemed safe Supercharging and turbocharging are permitted without re striction but shall require the displacement specifics of Section 18 0 B 3 For weight designations in EM Mazda rotary engines are compared to the piston engines listed i e 3 2L OHC vs 4 5L OHV 13B rotary engines should be equated to the 3 2L OHC engines 13B forced in duction 2 rotor engines 1308cc x 2 x 1 4 3662cc and all 3 rotor engines shall be grouped with vehicles required to meet the stated 1800 Ib minimum weight Supercharging and turbocharging are permitted for all engines sub ject 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 restric tor choke region must be made of one piece without moving parts E Minimum Weights Minimum weights for cars in DM and EM and all adjustments to these weights are shown in Appendix A E Aerodynamic Aids 1 These classes are restricted downforce classes No aerodynamic tunnels wings or sealing skirts may be added No bargeboards ramps vanes wickerbills or other aerodynamic devices are al lowed except as
118. esponsible for being in possession of the Spec Miata rules and for proving that his her car conforms to the rules Cars listed as eligible in and prepared to the current Club Racing B Spec Regulations are permitted to compete in their respective Street Prepared 2015 SCCA NATIONAL SoLo9 Rule 91 15 SrREET PREPARED Classes Neither Street Prepared nor B Spec cars are permitted to inter change preparation rules B Spec cars may use tires which are eligible un der current Club Racing B Spec rules even if they are not eligible in Street Prepared While the rules of the Street Prepared Category have remained essentially the same the laws governing various aspects of street driven vehicles have changed over time The original concept of this category as made up predominantly of street driven vehicles has been rendered inappropriate SCCA does not encourage or condone the breaking of laws governing pollution control systems or the alteration of street driven vehicles con trary to state and federal laws regarding their use It continues to be the responsibility ofthe individual to comply with such state and federal laws See Sections 3 8 and 8 3 1 for documentation requirements Specific vehicle classifications are located in Appendix A of these rules 15 1 AUTHORIZED MODIFICATIONS A All Allowable modifications permitted in Section 13 Street Category are allowed B Street Prepared vehicles may only be modified in excess of Street
119. esulting change to the position of the strut centerline is allowed Such brackets shall serve no other purpose This does not allow for changes to the integral steering arm on cars that have the steering arm integrated with the strut body J Changes in alignment parameters that result directly from the use of the allowed components are permitted For example the dimensional changes resulting from the use of a cylindrical offset bushing that meets the restrictions of Section 14 8 B are allowed including those resulting from a change in the pivoting action to 1 about the mounting bolt or 2 about the bushing itself 86 2015 SCCA NarionaL SoLo RULES 14 STREET TOURING K Subframe mount bushings may be replaced but must attach in the stan dard location s without additional modification or changes Subframe position may not be changed The amount of metal in a replacement bushing may not be increased relative to the amount of metal found in a standard bushing for the particular application Solid metal bushings are specifically prohibited 14 9 ELECTRICAL SYSTEM A The make model number and size of the battery may be changed but not its voltage Relocation of the battery or batteries is permitted but not into the passenger compartment If the battery is relocated and the original battery tray can be removed by simply unbolting it the tray may be removed or relocated with the battery Holes may be drilled for mounti
120. et shock absorbers struts or strut inserts whose shaft size is larger than the center hole of an upper shock mount assembly that hole may be en larged by the minimum necessary to accommodate the shock shaft size provided the following restrictions are met 1 the enlarged hole must remain concentric with the original configu ration 2 the enlargement of the hole does not require modification of a bear ing as opposed to a washer sleeve or plate 3 neither the hole enlargement nor the location of the shock shaft changes any alignment parameter Provided these constraints are met this permits enlarging of the center hole in an upper shock mount with an integrated rubber bushing where the bushing is in tegral to the mount and bonded to the plate and the mount is pro vided by the OEM as an assembly This includes drilling out and or removal of the metal sleeve D A suspension bump stop is considered to be performing the function of a spring Therefore the compressed length of the shock at the ini tial point of contact with the bump stop may not be increased from the standard part although the bump stop may be shortened for the pur pose of installing non standard shocks Bump stops installed externally and concentric with the shaft of a shock may be drilled out to fit a larger diameter shock shaft Bump stops may be substituted for the purposes of installing non standard shocks E A hole may be added through the bodywork t
121. f 0 045 1 14 mm from standard diameter 2015 SCCA Nationat SoLo Rules 127 17 PREPARED b Any flywheel of standard diameter or larger may be used provided it attaches to the standard or permitted alternate crankshaft at the standard location Additional fasteners may be used The di ameter of the flywheel includes the diameter of the starter ring gear Cars that are permitted a specific alternate transmission on the specification line may use a flywheel of standad diameter or larger for that alternate transmission c Clutch assemblies clutch linkages and release bearings are unre stricted Carbon clutch components are prohibited K Oiling System The use of any oil pan sump scrapers baffles windage trays oil pickup s pressure accumulator Accusump and oil filter s is permitted Filter and accumulator location is unrestricted but they shall be securely mounted within the bodywork The installation of any type of vent or breather on the engine is per mitted Crankcase oiling system breather or catch tank evacuation systems that are in any way connected to the exhaust system are prohibited LEVEL 1 PREPARATION FULL PREP VEHICLES Any engine driven oil pump may be used including a dry sump system The dry sump tank shall be mounted within the bodywork If said tank is mounted in the driver passenger compartment it shall be isolated from the driver by means of a metal bulkhead or additional c
122. factured prior to 1984 in which that requirement was added to the GCR Sidepods may not be removed from a car which was originally manufactured with them The measurements for the height the maximum width bodywork and the distance from the tires of sidepods as specified in the GCR Bodywork E 9 2nd paragraph shall have an allowance from the GCR of 1 25 4 mm It is the intent of this allowance to maintain the ability of the sidepod s to continue to hold such items as fuel tanks battery and radiator s but not to allow sidepods to be used for ground effects to achieve aerodynamic downforce on the vehicle 10 Electric radiator engine cooling fan s may be installed B DWARF CARS 600 RACING INC LEGENDS CARS AND BABY GRAND CARS Vehicles built and prepared to Western States Dwarf Car Association WSDCA US Legend Cars International or MMRA Baby Grand specifications are assigned to Modified Class F FM NoTE If any conflict exists between the WSDCA US Legend Cars or Baby Grand Rules and the Solo Rules the Solo Rules shall take precedence 1 Cars prepared to these specifications are required to comply with the appropriate rules from their sanctioning body except for the items listed below a Any tire including recaps meeting the applicable portions of Section 3 3 are allowed b Any differential and final drive gear ratio may be used c Any shock absorber may be used d Any wheel up
123. following manufacturers are eligible for Sports 2000 in this class Bobsy Chevron Daedalus KBHMariah Lola March Apache Reynard Royale Shrike Swift and Tiga The SEB may add to this list at any time effective upon notification ofthe membership B Other Club Racing GCR compliant Formula Cars 1 Formula Vee FV 2 Formula First FST C Solo Vee as per the following definition Solo Vee is based on Club Racing Formula Vee FV and all cars shall meet all specifications de scribed in the Club Racing GCR Sections 9 1 1 C 1 C 2 C 3 C 4 C 6 C 7 C 8 C 9 C 10 C 11 and C 12 except as amended in these rules No per mitted or alternate component or modification shall additionally per form a prohibited function 1 ENGINE CHOICES a Any standard 1600 cc or smaller air cooled automobile engine manufactured by Volkswagen VW for sale in VW vehicles avail able to the general public for purchase in the US is allowed 1 Solo Vee engines may increase compression up to and includ ing 10 1 ratio with OE bore and stroke Compression ratio may be increased by additional machining of any factory machined surface on the cylinder heads only Fuel injection is prohibited Valve size may be increased to a maximum of 40 0 mm intake and 35 5 mm exhaust Port location may not be changed from OE standard Machining of any type in the combustion cham ber such as but not limited to valve unshrouding is prohibit ed Valve guide centers
124. function as a wing 2 A spoiler may be added to the rear of the car provided it complies with either of the following a Itis a production rear spoiler which is standard or optional equip ment of a US model of the vehicle or an exact replica in an alter nate material N 94 2015 SCCA Nationa SoLo9 RULES 15 SrREET PREPARED b It is a non production rear spoiler which is mounted to the rear most portion ofthe rear hatch deck or trunk lid The spoiler may extend no more than 10 254 mm from the original bodywork in any direction Alternatively in a hatchback the spoiler may be mounted to the rear hatch lid at or near the top of the hatch in such a configuration the spoiler may extend no more than 4 101 6 mm from the original bodywork in any direction The spoiler may be no wider than the original bodywork and it shall not protrude beyond the overall perimeter of the bodywork as viewed from above The use of endplates is prohibited Angle of attack is free The spoiler may not function as a wing J Rollover structures 1 Roll bars must comply with Section 13 2 G 1 in Street category 2 Roll cages must comply with the following a The roll cage need not be removable It shall be bolted or welded to the car b The cage shall attach to the car at no more than 8 points consist ing of the basic cage with 6 attachment points and 2 additional optional braces c The forward part of the cage shall be mounted to the flo
125. gs shall not exceed 8 sq ft 0 7432 m as calculated per Section 12 9 The number of wing elements is limited to 2 Wings designed to be adjust able while the car is in motion must be locked in a single position Wings and any component thereof may not extend beyond the vehicle width as defined by the outermost portion of the vehicle doors less mirrors door handles rub strips and trim In addition no portion of the wing or its components may be more than 6 15 24 cm forward of the rear axle more than 0 0 0 mm beyond the rearmost portion of the bodywork or more than 6 15 24 cm above the roofline of the vehicle regardless of body style Reinforcements to the wing mounting area may be used but may serve no other purpose Wing endplate surface area is limited to 200 sq in 1290 3 cm each and the number of endplates is limited to a maximum of 2 For con vertibles roadsters with no roof and targas with no rear window no portion ofthe wing may be higher than 12 30 48 cm above the wing s point of attachment to the body of the vehicle In the event that a con vertible roadster with no roof or a targa top with no rear window re tains the OE windshield frame with a windshield of any material that meets Section 17 2 K 1 the top of the windshield frame shall be con sidered the top of the roofline and the car may use the wing mounting rules in Appendix A 1 c for a closed car Canards are allowed and may extend a maximum of 6
126. hassis FWD 1990 91 Starlet Tercel Triumph GT 6 Herald all Spitfire TR 2 amp TR 3 TR 4 amp TR 4A TR 250 amp TR 6 TR 7 Volkswagen Beetle RWD Cabriolet 1985 92 Corrado all Dasher amp Quantum 4 cyl all Fox GL Golf amp Jetta all A2 chassis 1985 93 Golf Jetta amp Cabrio 8v A3 chas sis 1993 98 Golf amp Jetta VR6 A3 chassis Golf amp Jetta VR6 NOC A4 chas sis Golf Jetta amp Beetle TDI Karmann Ghia Passat all NOC APPENDIX A STREET PREPARED Rabbit Jetta Scirocco Cabrio let amp Pickup all A1 chassis 1975 92 Rabbit 2 5L 5 cyl A5 chassis 2006 09 Volvo 120 Series all 140 Series all 160 Series all 1800 P1800 amp ES1800 all 240 Series non turbo all 260 Series all 700 Series all Yugo all Sedans under 1 7L not otherwise classified 4 cyl amp rotary RWD mini pickups See Section 15 1 C for update back date limitations 2015 SCCA NarionaL SoLo Rules 191 LO RULES So 192 2015 SCCA NATIONAL APPENDIX A STREET MODIFIED STREET MODIFIED CATEGORY ENGINE CLASSIFICATIONS 1 4 stroke cycle and 2 stroke cycle naturally aspirated internal com bustion engines will be classified on the basis of actual piston dis placement 2 Supercharged or turbocharged SM and SSM engines will be classified on a basis of adding 1 4L to the actual displacement Forced induc tion SMF eng
127. having original vents louvers exceeding these dimensions no further open ings are permitted Louver openings must face rearward and may stand no higher than 1 0 25 4 mm above the original surface No additional scoops cowls bulges or ducts are permitted unless specified in Ap pendix A T AII headlights front parking lights and front signal lights may be re moved Headlight doors may be removed replaced or modified Any remaining openings shall be covered with a wire mesh screen or panel of fiberglass Plexiglas metal or other nonflammable material Ducts from headlights headlight doors front parking lights and front signal lights may be used for ducting air to the engine front brakes and or oil cooler s Any opening used for ducting may not be relocated These ducts may pass through interior panels for this purpose The cross sec tion area of a single duct shall not exceed the cross sectional area of the original single headlight U All side marker lights and tail stop lights may be removed If such an item is removed the resultant opening must be covered V Spare wheel and tire may be removed 17 3 TIRES Any tire including recaps meeting the Solo safety requirements and the applicable portions of 3 3 is allowed 17 4 WHEELS A Any wheel not exceeding 12 in width may be used foer all classes may be replaced in accordance with the Prepared class listings in Appendix A 2015 SCCA NATIONAL SoLo R
128. he block may be rebored no more than 0 0472 1 2 mm over stan dard unless otherwise specified in Appendix A US produced six cylin der and eight cylinder engines may be rebored no more than 0 060 1 52 mm over standard Alternate blocks which are of the same material and nominal dimensions as standard are allowed Critical dimensions for piston engines are deck height cylinder bore cyl inder spacing vee angle and distance from crank centerline to cam centerline Critical dimensions for rotary engines are epitrochoidal curve working chamber volume and eccentric shaft location 126 2015 SCCA NATIONAL SoLo RULES 17 PREPARED N Cylinder sleeves may be fitted to the block for repair purposes if they serve no other prohibited function Sleeving may not be used to cre ate a new engine configuration one which exhibits the same dis placement as an allowed engine but which has differing bore and stroke unless authorized in Appendix A Oil passages may be en larged restricted or plugged Ww Any crankshaft main bearing caps and any additional main bearing cap bolts may be used provided that no materialis added to the block for their use Any crankshaft main bearing stud girdle may be used D The compression ratio may be increased by means of milling the block and the block may be machined to utilize O rings to replace or supplement a cylinder head gasket 5 The block may be machined for the purpose of adding or
129. he largest permitted front brake rotors 17 7 ANTI ROLL SWAY BARS Any anti roll bar camber compensating device panhard rod watts link age and or other suspension stabilizer is permitted Attachment points of such components are unrestricted Components may pass through body panels chassis panels and frame members A LEVEL 1 PREPARATION FULL PREP VEHICLES Components may extend into the driver passenger trunk compartments but shall be covered with metal panels B LEVEL 2 PREPARATION LIMITED PREP VEHICLES Components and mounting cannot be located in the trunk or driver passenger compart ment unless fitted as standard 17 8 SUSPENSION SUSPENSION CONTROL A Spindles hubs bearings bearing carriers stub axles etc may be modi fied or replaced B Suspension Control 2015 SCCA Nationat SoLo Rules 121 17 PREPARED 1 Original suspension control arms may be reinforced modified or re placed with components of unrestricted origin The manufacturer s original basic type of rear suspension e g inde pendent live axle swing axle MacPherson strut A arm etc shall be retained unless otherwise stated in Appendix A Suspension bushings are unrestricted Adjustable spherical bearings or rod ends are permitted on all suspension components The wheelbase of the vehicle shall not be changed or relocated in a fore aft direction by more than 1 0 25 4 mm strack News January 2015
130. heels are allowed with widths up to the following OE wheels ex ceeding these maximums are not permitted STE STS STR AWD an u ilir d n biy ln lan 7 5 SEX AWD eraspena 8 0 STX STR 2WD a zazik nara biii b kitika r W rra Hana 9 0 A a unlimited 14 5 SHOCK ABSORBERS A Shock absorber bump stops may be altered or removed B Any shock absorbers may be used Shock absorber mounting brack ets which serve no other purpose may be altered added or replaced provided that the attachment points on the body frame subframe chassis suspension member are not altered This installation may in corporate an alternate upper spring perch seat and or mounting block bearing mount The system of attachment may be changed The num ber of shock absorbers shall be the same as standard No shock absorb er may be capable of adjustment while the car is in motion unless fitted as original equipment MacPherson strut equipped cars may substitute struts and or may use any insert This does not allow unauthorized changes in suspension geometry or changes in attachment points e g affecting the position of the lower ball joint or spindle It is intended to allow the strut length changes needed to accommodate permitted modifications which affect ride height and suspension travel 14 6 BRAKES A Non standard brake rotors may be used provided they are of equal or larger dimensions diameter and thickness and made of ferrous
131. hose with AN Series threaded couplings or entirely cov ered and protected with a metal cover b Any fuel pump s filter s and pressure regulator s may be used 108 2015 SCCA NATIONAL SoLo RULES 16 STREET MODIFIED Such components may not be located in the passenger compart ment but their location within the bodywork of the car is other wise unrestricted If a mechanical pump is replaced a blanking plate may be used to cover the original mounting point c A cool can not exceeding one gallon in volume may be used The cool can may not be installed in the passenger compartment d The fuel tank may be modified or replaced If the fuel tank is modi fied or replaced the following restrictions apply 1 No part of the fuel tank or fuel cell shall be closer than 6 0 15 24 cm to the ground unless enclosed within the bodywork and mounted above the floor pan A metal bulkhead is required that provides total separation between the driver compart ment and the compartment containing the fuel tank and or filler neck This includes fuel tanks that are flush mounted with driver compartment panels or otherwise exposed to the driver compartment Fuel filler doors in the driver compart ment must be positively fastened non metallic fasteners are not allowed For the purposes of these rules a fuel tank consisting of a structure containing a fuel bladder is considered to be the en tire fuel cell including the containing st
132. ifications are permitted as follows 1 Steering components including the steering rack and or box tie rods idler arms power assist devices and related components may be replaced added moved or removed The steering column within the passenger compartment is specifically excluded from this al lowance This does not permit removal or modification of column mounted accessories Wheel mounted electrical switches such as those for the horn radio cruise control or shifter may be relocated and or replaced or eliminated 2 Rear steer devices may be replaced with solid links 3 Supplemental steering gear boxes or steering quickeners are allowed as long as they are mounted in accordance with Section 16 1 F 1 4 Steering wheels and associated mounting hardware may be replaced This does not permit removal or modification of the steering col umn or column mounted accessories OE wheel mounted electrical switches such as those for the horn radio cruise control or shifter may be relocated and or replaced or eliminated G Subframe connectors are allowed as per Street Prepared Section 15 2 E H Subframe bushings may be replaced with bushings of any material as long as they fit the original location Offset bushings may not be used I Front hoods engine covers engine covers trunk lids and hatches not containing glass front fenders rear fenders not part of chassis struc ture unibody front amp rear fascias and side skirt
133. ifications below or be otherwise recognized by the SEB 1 Kit Cars Kit cars which were originally designed constructed and licensable for street use may participate in DM and EM if they are approved by the SEB Members desiring approval of a particular kit car should provide the SEB with detailed information regarding the kit model and contact info if available for the OE manufacturer For obsolete kit cars the member will be expected to provide construction speci fications dimensions and photographs for the SEB to examine and keep on file The SCCA will evaluate each submitted kit model indi vidually and the evaluation will ensure that the specific model a Follows current DM and EM allowances regarding minimum floor pan dimensions see Section 18 1 C 1 Has no unusually advantageous aerodynamic features Has no exceptionally low center of gravity Has no exceptionally high strength to weight ratio 0 pan c Has no other unique features that would upset the competitive balance in DM and EM Has independently verifiable evidence of at least 10 examples which meet the approved specification produced Extremely lim ited production sports racer type efforts are discouraged 136 2015 SCCA NATIONAL SoLo RULES Tm 18 MobirieD Constructed examples of approved kits are subject to the following a They will automatically take the Modified Tub weight penalty see Appendix A b They will have the same weight displacemen
134. in a standard location OFF position shall be clearly in dicated at the master switch location The standard locations shall be as follows a FORMULA AND SPORTS RACING CARS In proximity to the right hand member of the roll bar but in a location so that it cannot be operated accidentally It can be mounted on a bracket welded to the inside of the upright member or mounted so that the op erating lever or knob is outside of the body panel immediately inboard of the upright member b CLOSED SPORTS RACING CARS PRODUCTION CARS AND GT CARS In front of the windshield on either the cowl or on top ofthe fender but close enough to the windshield to be accessible if the car is overturned Alternatively it may be mounted below the center of the rear window or on a bracket welded clamped or bolted to 134 2015 SCCA NATIONAL SoLo RuLEs 18 MobiFIED the roll cage or dash easily accessible through the open window Drilling of holes in roll cage to attach the bracket is prohibited C OPEN PRODUCTION AND GT Cans May exercise a choice among the above locations Driveshaft Hoop RWD DM and EM vehicles shall have a driveshaft hoop capable of preventing the shaft from entering the driver s compartment or damaging any fluid or electrical lines in the event of joint or shaft breakage All cars in competition using open drive shafts must have a retainer loop with 360 of enclosure inch 0 250 6 35 mm minimum thickness and 2 0 50
135. ines will add 1 0L to the actual displacement 3 Rotary Engines Wankel These units will be classified on the basis of a piston displacement equivalent to 0 9 liters times the number of rotors plus the volume determined by the difference between the maximum and minimum capacity of the working chamber times the number of rotors 4 Electric Motors Cars with electric motors in whole or part of the drivetrain will run at class maximum weight 2900 lbs for SSM 3100 lbs for SM SMF Category weight adjustments e g tire size are allowed WEIGHT ADJUSTMENTS Cars running tires with a rated width of 275 mm or less on all four wheels may compete at a minimum weight 200 Ibs less than their cal culated weight Street MobirieD CLass SM ELIGIBLE VEHICLES All sedans coupes models which were originally equipped with a min imum of four seats and four factory seat belts all FWD front wheel drive cars and pickup trucks in compliance with Section 3 1 using SM allowances and minimum weight calculation EXCLUDED VEHICLES Porsche all Lotus all Nissan Datsun Z car 242 pre 1990 MGB GT Triumph all MINIMUM WEIGHT CALCULATIONS WITHOUT DRIVER FWD 1550 lbs 125 lbs per liter RWD 1800 Ibs 200 Ibs per liter AWD 1800 lbs 300 lbs per liter cont 2015 SCCA Nationat SoLo Rules 193 STREET MODIFIED APPENDIX A Supercharged or Turbocharged SM engines Add 1 4L to the actual dis placement Rear wh
136. inimum weights ultimately result in higher costs to the competitor The rules shall discourage the use of high technology high cost equipment In some cases this is accomplished by an outright ban on the equipment In other cases this is accomplished through the adjustments to mini mum weight See Section 17 11 for weight adjustments al 17 0 B Specifications The SCCA shall publish specifications for each car specifically classed in the Prepared Category Section of Appendix A These specifications will at a minimum specify each vehicle s allowed minimum weight and maximum wheel sizes 1 Equipment and or specifications may be exchanged between differ ent years and models of a vehicle if a the item is standard on the year model from which it was taken and b the years models are listed on the same line of Appendix A Pre pared Classes The updated backdated part or the partto which it 2015 SCCA NarionaL SoLo Rutes 113 17 PREPARED is to be attached may not be altered modified machined or oth erwise changed to facilitate the updating backdating allowance unless the modification is specifically allowed by these rules Cars not listed in the Prepared Category Sections of Appendix A may not be updated backdated until approved by the SEB and pub lished in the official SCCA publication and or on www scca com 2 The SCCA may recognize certain optional components Some non original components may be made mandatory t
137. ins the same as that of the standard production engine If a distributor is removed a blanking plate or breather may be fitted in its place C The original generator or alternator may be completely removed or re placed Mounting location and drive system for the generator or alter nator is unrestricted D The remaining components of the electrical system are unrestricted E It is recommended that all vehicles be equipped with an electrical sys tem master cutoff switch 17 10 ENGINE AND DRIVETRAIN A Component Modification 1 Where allowed original and alternate components ofthe engine may be lightened balanced and modified by any mechanical or chemi cal means provided that it is always possible to identify required components as original Such means include but are not limited to shot peening glass beading heat treatment or hardening plating and milling 2 No material or mechanical extension may be added to any required original component unless specifically authorized by these rules Any repair performed to a required original component shall clearly serve no other prohibited function Compression ratio may not be increased via welding of combustion chambers B Induction System 1 Any air filter s velocity stack s and or air box es may be fitted Air may be ducted to the carburetor or fuel injection provided that the ducting is contained within the engine compartment and that the air to be ducted is supplied th
138. ion and convenience sys tems is allowed provided the modification does not serve another pur pose e g an air conditioning compressor may not be modified to serve as a supercharger 17 12 SAFETY A Roll Bars Roll Cages Aluminum is not an allowed material 1 All open Prepared Category vehicles shall have at a minimum a roll bar complying with Appendix C 2 It is recommended that all cars be equipped with a roll cage meet ing the requirements of the Club Racing GCR Compliance with this requirement supersedes the need to comply with Section 17 12 A 1 3 Roll bars and cages may either be bolted or welded to the vehicle B Ata minimum all vehicles will be equipped with driver restraints meet ing Solo safety requirements It is highly recommended that all cars with roll bars cages be equipped with driver restraints meeting the re quirements of the GCR C A scattershield or explosion proof bell housing complying with the GCR is recommended D Fire extinguishers or fire systems are permitted 132 2015 SCCA NATIONAL SoLo RuLES 18 MobiFIED 18 MODIFIED CATEGORY Sports cars and sedans altered in excess of Prepared Category sports rac ing and two seat specials Formula cars single seat specials dune bug gies and kit cars Active Automatic Braking Systems ABS and Traction Control Systems TCS are prohibited in Modified classes B BM C CM and F FM Traction Control Systems are prohibited in Modified
139. ion 17 2 however the shape of the body must remain recognizable as that of the approved make and model The body must be made of a fire resistant material Doors hoods trunk lids sunroofs hatchbacks etc need not func tion as originally designed Bumpers grilles lights glass and trim may be removed Side mirrors and tail stop lights are not required 2 Firewalls and floors shall prevent the passage of flame and debris to the driver compartment For cars having fluid lines in a non stan dard routing over the belly pan the belly pan shall have drain holes 2015 SCCA Nationa SoLo Rules 137 18 MobirieD to prevent the accumulation of fluids 3 The driver must be provided with clear and unobstructed access to the driver s compartment 4 Interiors may be gutted The driver s seat mustbe securely mounted Steering and driver seating must be completely to the left or right of the vehicle longitudinal centerline The seat must be mounted such that no part of the driver s body below the waist may cross the lon gitudinal centerline of the car 5 Body panels may be altered and air ducting installed to accommo date the installation ofthe water radiator If the radiator encroaches into the driver compartment it must be separated from the driver by a metal bulkhead or enclosing container 6 Hoods may be altered to allow for induction system changes with out restriction Such alterations shall serve no other purpose 7 S
140. l Volkswagen Corrado VR6 or 1 8L Supercharged w 54 mm inlet restrictor 1990 95 Golf GTI amp Jetta TDI or VR6 A3 chassis 1993 98 Golf GTI amp Jetta 1 8T TDI or VR6 A4 chassis 1999 2005 Golf GTI amp Jetta 2 0T or TDI A5 chassis 2006 10 New Beetle 1 8T or TDI 1998 2010 R32 3 2L V6 AWD 2004 Sedans 4 cyl forced induction amp 6 cyl NOC 2015 SCCA Nationa SoLo Rules 217 APPENDIX A AM BM Monnen MODIFIED CATEGORY All listed weights are with driver except where noted otherwise Weights not listed default to the appropriate SCCA Club Racing GCR General Competition Rules reference Car is defined in Section 12 In the Solo Rules Sections where preparation allowances are specified and if there are conflicts with the GCR allowances the Solo Rules shall take precedence A Mooiriep AM Cars with a minimum weight of 900 lbs with driver and a minimum 72 182 9 cm wheelbase plus Formula SAE as specified in Section 18 5 Club Racing GCR compliant Formula S FS and A Sports Racer ASR vehicles may compete in this class B MonirieD BM All Formula Cars or Sports Racers compliant under the 2013 Club Racing GCR unless specifically classed elsewhere with the following exceptions A Spec tires are not required B Minimum wheelbase of 80 203 2 cm C Sports Racers and all Open Wheel Cars including Formula Atlantics 1 2 3 on 6 Turbocharged and supercharged
141. lar as possible under the circumstances Substitute parts which provide improvements in performance e g superior gearing lighter weight bet ter camshaft profile are not permitted under this allowance 2015 SCCA NATIONAL SoLo Rule 105 16 STREET MoDIFIED 16 STREET MODIFIED CATEGORY 16 0 A Purpose To serve as amembership recruitment and retention tool by providing a natural competition outlet for auto enthusiasts using streetable sport sedans equipped with drivetrain and suspension modifications that are beyond those allowed in the Street Prepared category 16 0 B Vehicle Eligibility 1 STREET MODIFIED SM All sedans coupes models which were originally equipped with a minimum of four seats and four factory seat belts all FWD front wheel drive cars and pickup trucks in compliance with Section 3 1 using SM allowances and minimum weight calculation a Sample Vehicles CHRYSLER Neon Stratus Breeze FORD Contour Escort Probe Mustang GENERAL MOTORS Cavalier Sunfire Camaro HONDA Civic Accord Integra HYUNDAI Elantra Tiburon MAZDA Protege MX 6 626 NISSAN Altima Sentra TovoTa Celica Corolla Camry VOLKSWAGEN Golf Jetta b Sample Excluded Vehicles Porsche all Datsun Z car 2 2 JDM spec cars MGB GT Triumph all 2 SUPER STREET MODIFIED SSM a All two seat cars including the types of cars listed above in 16 0 C 1 b which are not excluded below b All SM eligible sedans coupes e
142. lassing for any car models not specifically listed in Street Category provided that vehicle was produced in quantities of at least 1 000 in that model year A car will remain eligible for National events through the end of the 30th calendar year after the manufacturer designated model year of the car This eligibility limitation applies only to the Street classes Except for modifications authorized below Street Category cars must be run as specified by the manufacturer with only standard equipment as de fined by these Rules This requirement refers not just to individual parts but to combinations thereof which would have been ordered together on a specific car Any other modifications or equipment will place the car in Street Touring Street Prepared Street Modified Prepared or Modified Categories as appropriate Configurations involving damaged parts e g blown fuses are not typically authorized by the manufacturer and hence are not allowed Option package conversions may be performed between specific vehicles of a particular make and model but only between configurations from within a particular model year Such conversions must be totally complete and the resultant car must meet all requirements ofthis Section These re quirements are not met by simply pulling a fuse to disable a feature which distinguishes one model from another Alternate parts listed in a factory parts manual are not authorized unless their use is specifically
143. le Valve Timing VVT sse 69 Wing Area Computation an maana tt 69 13 STREET CATEGORY aa aika aa a d An WARA 71 13 1 AUTHORIZED MODIFICATIONS eee 72 12 BODYWORK Lies etate ed dyana dal nne aee am XR aa eA S UNS n y dak aka 72 13 3 TIRES caia aia 73 NES EE 74 13 5 SHOCK ABSORBERS mma aa aakala 75 13 6 BRAKE c 76 13 7 ANTI ROLL SWAY BARS eene 77 2015 SCCA Nationa SoLo RuLes 9 13 0 SUSPENSION 5 etr a ree teta Arkan Mala ts ere ads caida 77 13 9 ELECTRICAL SYSTEM maa maa NG 77 13 10 ENGINE AND DRIVE TRAIN een 78 14 STREET TOURING CATEGORY eee 81 14 1 AUTHORIZED MODIFICATIONS eene 81 14 2 BODY WORK maman makakasama ege Seege ENEE 81 14 3 TRES EODEM 82 144 WHEELS iit onte tte AA LIN GAL 83 14 5 SHOCK ABSORBERS aa aNG NAAN 83 140 BRAKES 83 14 7 ANTI ROLL SWAY BARS seen 84 14 0 SUSPENSION etie ete tne tede tbe da b la e ta cenas na 84 14 9 ELECTRICAL SYSTEM 2na nte tette tienes 87 14 10 ENGINE AND DRIVETRAIN esee 87 14 11 OUT OF PRODUCTION CARS 1 eene 89 15 STREET PREPARED CATEGORY eee 91 15 1 AUTHORIZED MODIFICATIONS sene 92 19 2 BODY WORK EE 93 adi 96 ASA WHEELS Supis tends ett tet V ya d xen Anka GA 96 15 5 SHOCK ABSORBERS rte tette teorie 96 15 6 BRAKES sousi ect era uen rn aac n e enya Mb chos 97
144. llowed For example alter nate computer module control of ignition settings or fuel injection is allowed E Air conditioning systems may be removed in whole or in part This rule should not be interpreted to allow modification of the heater system F On all forms of suspension camber caster adjustment within factory specifications may be achieved by the use of shims or eccentric bush 92 2015 SCCA Nationa SoLo9 RULES 15 SrREET PREPARED ings The intent of this allowance is to permit cars to be restored to within factory allowed specification ranges not to provide an addi tional method beyond those permitted in Section 15 8 Suspension to obtain alignment settings beyond the factory specifications Refer to Appendix F for past clarifications of these rules 15 2 BODYWORK Vehicles may only exceed the allowances of Section 13 2 as specified here in A Fenders and bumpers may be modified for tire clearance This includes the portion of a hood which serves as a fender wheel well where ap plicable This does not permit modifications to the chassis or bodywork inboard of the vertical plane of the hub wheel mounting face at rest with front wheels straight ahead Flares may be added although tires may extend beyond the bodywork Replacement of complete hood flared fenders or quarter panels is prohibited Plastic and rubber wheel well splash shields may be modified for tire clearance and for installa tion of fender flares
145. ma terial e g iron Thickness includes the individual plates of a vented rotor as well as the overall dimension The diameter for replacement rotors is measured at the minimum outside dimension Aluminum ro tor hats are allowed Cars originally equipped with solid non vented rotors may utilize vented rotors Cross drilled and or slotted brake ro tors may be fitted provided all such voids are within the disc area and comprise no more than 1096 of that area Brake calipers and mounting brackets may be replaced provided they bolt to the standard locations and the number of pistons is equal to or greater than standard A func tioning emergency brake of the same type operation and actuation as OE must be present Drum brakes may be replaced with disc brakes of a diameter equal to or greater than the inside diameter of the standard drum Such conversions must be bolted not welded to the axle trail 2015 SCCA NATIONAL SoLo Rules 83 14 STREET TOURING ing arm upright and must include an integral redundant emergency brake Changes to backing plates dust shields brake lines to accom modate these changes are permitted but may serve no other purpose B Brake lines may be substituted with alternate DOT approved flexible brake lines C Air ducts may be fitted to the brakes provided that they extend in a for ward direction only and that no changes are made in the body struc ture for their use They may serve no other purpose
146. may be extended to allow for the installation of noise suppression devices This allowance is provided solely to reduce the exhaust noise emanating from these cars by allow ing the installation of a noise limiting device s and in so doing keep the total exhaust length to a minimum for safety reasons The installa tion and the noise limiting device s shall serve no other purpose than that stated and this allowance only applies to an extension of the ex haust system not the vehicle bodywork or frame 18 0 B Engine Classifications 1 Four stroke cycle and two stroke cycle naturally aspirated internal combustion engines will be classified on the basis of actual piston displacement 2 Rotary Engines Wankel These units will be classified on the basis ofa piston displacement equivalent to twice the volume determined by the difference between the maximum and minimum capacity of the working chamber times the number of rotors 3 Turbocharged or supercharged versions of the above engines will be classified on a basis of 1 4 times the computed displacement 2015 SCCA Nationat SoLo RuLes 133 18 MobirieD 18 0 C Aerodynamics The area of a wing shall be computed by multiplying the width and depth of the wing assembly top view without regard to the curva ture and or inclination of the wing or number of elements Any airfoil shadowed by another airfoil with more than six inches between them will have its own projected area added t
147. may be used in the adjustable camber plate attachment to the strut The installation may incorporate an alternate upper spring perch seat and or mounting block bearing mount Any ride height change resulting from installa tion of camber plates is allowed Caster changes resulting from the use of camber plates are permitted D Differential mount bushings may be replaced but must attach in the standard location s without additional modification or changes Dif ferential position may not be changed The amount of metal in a re placement bushing may not be increased relative to the amount of metal found in a standard bushing for the particular application Solid metal bushings are specifically prohibited E Steering rack bushings may be replaced but must attach in the factory location s without additional modification or changes Steering rack position may not be changed The amount of metal in a replacement bushing may not be increased relative to the amount of metal found in a standard bushing for the particular application Solid metal bushings are specifically prohibited This does NOT allow shimming or otherwise relocating the steering rack F Camber bolts may be installed providing these parts use the original unmodified mounting points and meet the restrictions specified in Sec tion 14 5 B Caster changes resulting from the use of camber bolts are permitted G Solid axle rear wheel drive RWD suspension allowances 1 Addition
148. mfort and convenience modifications which have no effect on performance and or handling and do not materially reduce the weight of the car are permitted This does not allow driver s seat substitutions or the removal of tow hooks or tie down loops Delayed shutdown devices such as the Turbo Timer which perform no function while the car is in motion are permitted This does permit the installation of an ad ditional mirror e g Wink but does not allow the removal of the original mirror B Data acquisition systems including video cameras and the accompa nying sensors are allowed but may serve no other purpose during a run than real time display and data recording D Hood straps or fasteners may be added D Alternate steering wheels are allowed provided the outside diameter is not changed by more than one inch from the standard size Steering wheels with an integral airbag may not be changed E Alternate shift knobs or paddles are allowed 72 2015 SCCA Nationa SoLo Rules 13 STREET E Spare tires tools and jacks may be removed Any fastening hardware and or other pieces that can no longer be firmly secured in the absence of the spare tire may be removed if necessary to ensure compliance with Section 3 3 3 B 1 Safety Inspection Requirements G Roll Bars and Roll Cages 1 Roll bars may be added Roll bars may be welded in Standard roll over hoops and covers may be removed if the resulting installation
149. mission employing a torque converter is allowed b Hydraulic electric shifting mechanisms may be modified in auto matic sequential transmissions employing a torque converter c Pneumatic hydraulic or electronically controlled shifting is not allowed for manual transmissions except for electronically con trolled overdrive manual transmissions in cars which were origi nally equipped with them d Gear ratios may be modified e A functional reverse gear is not required f The transmission tunnel cover may be altered to allow the instal lation of an alternate transmission and or driveshaft Cars origi nally equipped with a removable transmission tunnel cover may substitute a tunnel cover of an alternate material 4 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a There is no weight increase for the use of a standard transmission utilizing standard case gear ratios and synchromesh style gear engagement b An alternate transmission that uses standard type circular bev eled synchronizers imposes a 2 596 weight increase c An alternate transmission that uses a gear engagement mecha nism different than standard type circular beveled synchroniz ers imposes a 596 weight increase Q Final Drive 1 Alternate driveshaft s may be used Any driveshaft assembly may be modified to permit the use of an alternate transmission All non standard driveshafts must be made of metal 2 Any gear ratio and or differential limit
150. namic features are per mitted Chassis rake is free Additionally no side skirt or body side etc may extend more than 1 0 cm 0 394 below this lower surface anywhere on the car to the rear of the front axle unless specifically permitted by these rules Diffuser sideplates and strakes may ex tend below the diffuser surface as long they do not attain a definite seal with the ground on level ground 6 If the factory production car was supplied with tunnels or wings they may remain but they must be blocked in a safe manner to pre vent them from functioning to provide downforce For example foam or sheet metal may be firmly attached in tunnels or on wings to ruin their shape or to stop airflow 7 Vanes strakes and or endplates elements are permitted on front and rear spoilers A minimum distance of 6 0 152 4 mm must separate adjacent elements These do not have to be square or rect angular the side profile shape is open For each element the total area may be no more than 2015 SCCA Nationa SoLo Rutes 143 18 MobirieD 56 sq in 362 9 cm for a roof spoiler 100 sq in 645 16 cm for a trunk spoiler 35 sq in 232 26 cm for a front splitter G Brakes The use of any type brakes pads and components are permitted disc or drum The location of brake components inboard vs outboard may be changed from original The original emergency or hand brake may be removed H Tolerances A tolerance of X12 212
151. nd Sports 2000 S2 Within the limitations of the GCR addi tional frame bracing suspension and steering changes relocation of ancillary components radiators batteries etc and their associated mounting brackets is permitted Nothing in these rules is to be con strued as overruling any GCR construction requirements or limitations except for those safety items which the Solo Rules do not require The purpose of these rules is to maintain the value of these cars for Club Racing and therefore their market value and to prevent special Solo only Formula F vehicles Exceptions to the Club Racing GCR for all cars in this class 1 Spec tire requirements do not apply 2 Sports 2000 minimum weight with driver Cast iron cyl head and standard camshatf t 1310 lbs Aluminum cyl head and standard camshaft 1335 lbs Cast iron cyl head and alternate camshaft 1335 lbs Mazda MZR engine n nete e danas 1335 lbs 3 Only cars produced by the following manufacturers are eligible for FF in this class ADF Alexis Anson Caldwell Citation Crossle Dulon 220 2015 SCCA Nationat SoLo RuLEs APPENDIX A CM MODI FIED Eagle Elden Forsgrini Gemini Hawke Konig Heath LeGrand Lola Lotus March Merlyn Mondiale Piper PRS Reynard Royale Stohr Swift Tiga Titan Van Diemen Winkleman and Zink Only cars pro duced by the
152. ng or passage of cables Longer cables may be substituted to permit relocation The number of battery or batteries may not be changed from standard The area behind the rearmost seat is not con sidered to be within the passenger compartment The area under the rearmost seat is considered to be within the passenger compartment Battery allowances do not apply to electric and hybrid electric vehicles B The addition of electrical grounding cables and associated distribution blocks terminals is permitted Holes may be drilled for mounting only This does not permit the use of electrical enhancement components such as condensers voltage controllers etc 14 10 ENGINE AND DRIVETRAIN A Oil pans and pickups may be modified or substituted Addition or modi B fication of windage trays or crankshaft scrapers is not allowed Engine oil transmission fluid and power steering fluid coolers may be added or substituted including oil to coolant heat exchangers but may not serve any additional purpose Original equipment traction control systems may be electrically dis abled but not removed or altered in any other way C The air intake system up to but not including the engine inlet may be modified or replaced The engine inlet is the throttle body carburetor compressor inlet or intake manifold whichever comes first The exist ing structure of the car may not be modified for the passage of duct ing from the air cleaner to the engine i
153. nk suspension may not be replaced changed or modified N On arm and strut MacPherson Chapman suspensions the lower arms may be modified replaced OR other methods of camber ad justment as allowed by Sections 14 8 B C or G may be used but NOT both On swing or trailing arm suspensions the main arms may not be modified or replaced but lateral locating links arms may be modi fied or replaced Ww s Front wheel drive FWD cars with rear beam axles may use shims between the rear axle and hubs al The replacement arms or mounts must attach to the original stan dard mounting points All bushings must meet the requirements of Section 14 8 B Intermediate mounting points e g shock spring mounts may not be moved or relocated on the arm except as in cidental to the camber adjustment The knuckle bearing housing spindle assembly cannot be modified or replaced 6 Changes in suspension geometry are not allowed except as incidental to the effective arm length change NoTE Many modern suspension designs known by other names ac tually function as double A arm designs These include the rear sus pensions on 1988 on Honda Civic Integra Chrysler Plymouth Dodge Neon BMW E36 and most multi link and are covered by Section 14 8 H 1 I On strut equipped cars the strut s lower integral mounting bracket for attachment to the upright or spindle is unrestricted provided it attach es to the standard location Any r
154. nlet Holes may be drilled for mounting Emissions or engine management components in the air intake system such as a PCV valve or mass airflow sensor may not be removed modified or replaced and must retain their original function along the flow path D Exhaust manifolds headers downpipes and associated EGR tubes may be replaced with alternate units Exhaust exit may be relocated provid ed it meets Section 3 3 3 B 16 Relocation of the oxygen sensor on the header is permitted Exhaust heat shields which cover only and attach solely to these parts may also be replaced removed or modified All other exhaust heat shields may be modified the minimum amount nec essary to accommodate allowed alternate exhaust components Mount 2015 SCCA NarionaL SoLo Rules 87 14 STREET TOURING ing brackets hardware which serve no other purpose are considered part of the exhaust components E Catalytic converters Any catalytic converters are allowed but must at tach within 6 152 4 mm of the original unit Multiple catalytic con verters may be replaced by a single unit The inlet of the single replace ment converter may be located no further downstream than 6 152 4 mm along the piping flow path from the original exit of the final OE converter The extents of an OE converter are defined by the expansion chamber in which the catalyst is contained regardless of placement within larger exhaust sections Replacement converters m
155. nt Club Racing Ameri can Sedan AS rules are permitted to compete in Street Prepared class B BSP Neither Street Prepared nor American Sedan cars are permitted to interchange preparation rules American Sedan cars may use tires which are eligible under current AS rules even if they are not eligible in Street Prepared Cars listed as eligible in and prepared to the current Club Racing Tour ing category rules are permitted to compete in their respective Street Prepared classes Neither Street Prepared nor Touring cars are permit ted to interchange preparation rules Touring cars may use tires which are eligible under current Touring rules even if they are not eligible in Street Prepared Cars listed as eligible in and prepared to the current Street Touring cat egory rules are permitted to compete in their respective Street Prepared classes with the additional allowance that they may use any tire which meets the requirements of 15 3 and fits on the Street Touring compliant wheels and within the Street Touring compliant bodywork Cars eligible for the current Club Racing Spec Miata rules are permitted to compete in Street Prepared class D DSP with the additional allowance that they may use any size of any tire which meets the requirements of 15 3 and fits on the Spec Miata compliant wheels and within the compli ant bodywork Spec Miata cars in DSP may not intermix use of the Spec Miata and Street Prepared allowances The competitor is r
156. ny chassis component e g subframe in its entirety by one of alternate construction unless specifically permitted shall re sult in the vehicle being in excess of these rules which will invoke Sec tion 17 11 weight adjustments E The floor in the driver passenger compartment may be modified for in stallation of subframe connectors exhaust components battery boxes ballast weights and drivetrain clearance For the same reasons listed the rear seat floor area defined as the area extending rearward from the back of the driver s seat to the trunk and between the frame rails may be removed modified or replaced The driver passenger compartment must remain separate from any exhaust and drivetrain components by a metal panel Trunk floors may be modified removed or replaced If replaced the trunk floor must be replaced with metal panels of similar shape to the original Removal of the trunk floor is allowable only when a metal bulkhead separates the trunk area from the passenger compartment F The firewall may be notched or recessed for clearance of exhaust head ers electric lines coolant lines fuel carrying lines fuel pumps inter cooling piping carburetors air horns air cleaners and distributor Any material added to the firewall must be either steel or aluminum This 2015 SCCA NarionaL SoLo Rules 115 17 PREPARED requires a sealed firewall between engine and passenger compartment This rule is for driver s
157. ny oil or grease including synthetic is permitted I Valve seats and guides in older engines originally designed for leaded fuel may be only substituted with alternate components if the dimen sions are the same as those of the standard components 2015 SCCA NATIONAL SoLo Rules 79 14 STREET TOURING 14 STREET TOURING CATEGORY The Street Touring category of vehicle modifications is meant to fit be tween the current Street and Street Prepared categories This category provides a natural competition outlet for auto enthusiasts using afford able sports cars and sedans equipped with common suspension and en gine modifications compatible with street use Under the provisions of Section 1 1 of these rules SCCA Regions are free to allow any other version of the Street Touring concept which meets the local needs In particular some leeway in the area of bodywork allowances e g wings spoilers beyond those allowed in Section 14 2 F is encour aged at SCCA Regional Solo events See Sections 3 8 and 8 3 1 for documentation requirements 14 1 AUTHORIZED MODIFICATIONS All Solo Rules Street Category allowances plus all allowances contained in Section 14 14 2 BODYWORK A Pedal cover kits and other interior cosmetic accessories may be added Dress up items such as chrome dipsticks and non standard filler caps are permitted provided they serve no other purpose B The driver and front passenger seats m
158. o obtain an adjust ment of competition potential In all cases these components shall be listed in Appendix A No permitted or alternate component or modification shall additionally perform a prohibited function 3 Requests for alteration modification and or substitution of any specification or component shall be submitted for approval The ap proval process will include but not be limited to an analysis of cost availability performance impact rule enforceability and competitor input See Sections 3 8 and 8 3 1 for documentation requirements 17 1 AUTHORIZED MODIFICATIONS The modifications defined here in the Prepared Category are the only al lowed modifications The rules in this Section stand on their own they do not build upon the Street Street Touring or Street Prepared catego ry rules Modifications shall not be made unless specifically authorized herein No permitted component modification shall additionally perform a prohibited function If the rules do not specifically authorize a modifica tion it is not permitted A It is not permitted to make any changes alterations or modifications to any component produced by the manufacturer unless specifically au thorized by these rules B Any minor modification intended to allow or facilitate any allowed modification is permitted as long as it does not provide any intrinsic performance benefit in and of itself and is not explicitly prohibited elsewhere within these
159. o offset from the standard point the spin dle mounting location from the control arm plane N LA 2015 SCCA NATIONAL SoLo Rule 99 15 SrREET PREPARED Note Many modern suspension designs known by other names actu ally function as double A arm designs These include the rear suspen sions on 88 Honda Civic Integra Dodge Plymouth Neon BMW E36 and most multi link and are covered by Section 15 8 H 1 I Solid axle suspension allowances 1 Addition or replacement of suspension stabilizers linkage connect ing the axle housing or De Dion to the chassis which controls lateral suspension location is permitted 2 Traction bars or torque arms may be added or replaced 3 A panhard rod may be added or replaced 4 The upper arm s may be removed replaced or modified and the up per pickup points on the rear axle housing may be relocated 5 The lower arms may be replaced or modified and the lower pickup points on the rear axle housing may be relocated 6 Differential covers and attaching hardware may be replaced Methods of attachment and attachment points are unrestricted but may serve no other purpose e g chassis stiffening This does not au thorize removal of a welded on part of a subframe or bodywork to ac commodate the installation J On strut equipped cars the strut s lower integral mounting bracket for attachment to the upright or spindle is unrestricted provided it attach es to the standard location
160. o route the reservoir and hoseto a remote mounting location Such holes may serve no other pur pose E A hole may be added to interior body panels the engine compartment the trunk and or a strut bar to provide access to the adjustment mech anism on a shock absorber The hole may serve no other purpose and may not be added through the exterior body panels 13 6 BRAKES A The make and material of brake linings may be changed 76 2015 SCCA National SoLoG RULES 13 STREET B Substitution of clutch and brake hydraulic lines with solid metal or braided metal is allowed on all cars manufactured before model year 1992 C Alternate brake bleeder fittings e g Speedbleeders are permitted They may serve no other purpose 13 7 ANTI ROLL SWAY BARS A Substitution addition or removal of a single anti roll bar and support ing hardware brackets endlinks bushings etc is permitted The use of any bushing material is permitted A bushing may be implemented as a bearing B Substitution addition or removal of anti roll bars may serve no other purpose than that of an anti roll bar C No modification to the body frame or other components to accommo date anti roll bar addition or substitution is allowed except for the drill ing of holes for mounting bolts Non standard lateral members which connect between the brackets for the bar are not permitted 13 8 SUSPENSION A Standard as defined herein suspension spring
161. o the wing area calculation Any diffuser type aerodynamic device under the car which is used in downforce generation is not included in the wing area calculation This specification supersedes Section 12 9 for these classes 18 0 D Tires Any tire including recaps meeting the applicable portions of Section 3 3 is allowed 18 0 E Safety Requirements The following shall be required in all Modified Category vehicles 1 Scattershields Chain Guard The installation of scattershields or explosion proof bell housings shall be required on all cars where the failure of the clutch flywheel or torque converter could create a hazard to the driver or passengers Chain drive cars shall be fitted with a protective case shield to retain the chain in case of failure The following material requirements apply to scattershields explo sion proof bell housings Va inch 0 125 3 18mm SAE 4130 alloy steel Y inch 0 250 6 35mm mild steel plate Y inch 0 250 6 35mm aluminum alloy SFI or NHRA approved flexible shields 2 Master Switch All cars shall be equipped with a master switch easi ly accessible from outside the car Club Racing Spec Racer Ford vehi cles shall be wired per RFSRII The master switch shall be installed directly in either battery cable and shall cut all electrical circuits but not an on board fire system if so equipped It shall be clearly marked by the international marking of a spark in a blue triangle and mounted
162. on need not conform to the current GCR Section 9 1 1 D 3 C 2 F5 cars manufactured prior to January 1 1990 need not comply with crushable structures as defined in the current GCR Section 9 1 1 D 9 3 F5 cars manufactured prior to January 1 1990 which utilize a 73 185 42 cm wheelbase may compete even though the driver s feet extend beyond the front edge of the wheel rims 4 Minimum weights Ibs with driver e 725 AMW engine i Rotax 493 amp 494 CN GIN sesscssissascvsccoissivsasesaseonssiascsoizenssvecsasrzeiesesvinsastioncarssiesaabenss Rotax 593 CNG INE siet tae Ed te bn at mei ican 600 cc motorcycle engine Wheelbase of 73 or less with 440 engine 5 Rotax powered cars are permitted to use 34 mm or 38 mm Mikuni round slide carburetors AMW powered cars may use either the 38 mm AMW carburetors or update to the 38 mm Mikuni round slide carburetors In order to accommodate the use of the approved Mi kuni VM 38mm sidedraft carburetors on the AMW engine the use of the AMW intake manifold part 2736 00 is permitted as are the AMW rubber attachment boots gaskets and or hardware required for the use of this manifold Competitors using the Rotax 494 RAVE engine are required to use the 494 non RAVE rotary valve Rotax part 924509 or 924508 Ski Doo prefix 420 147 degree designa tion that opens 9 135 BTDC and closes 9 64 ATDC in their en gine RAVE valves shall be blocked in the full open position or left as delivered No othe
163. on of frame frame stubs beyond Section 17 2 C Replacement addition or removal of accessories gauges switches in dicators etc or other interior modifications for driver convenience or to permit installation of required safety equipment is authorized pro vided such modifications have no influence whatever on the mechani cal performance of the car Such modifications do not include the sub stitution or replacement of any bodywork or chassis component except those specifically authorized by these rules The standard OE front spoiler or a non standard front spoiler may be used If a non standard front spoiler is used it must comply with the fol lowing requirements It shall not protrude beyond the overall outline of the car as viewed from above or aft of the forward most part of the front fender opening cutout and shall not be mounted more than 4 0 101 6 mm above the horizontal centerline of the front wheel hubs The spoiler shall not cover the normal grille opening at the front of the car An intermediate mounting device may be used on cars whose front bodywork is above the 4 0 10 2 cm minimum Openings are permit ted for the purpose of ducting air to the brakes radiator and or oil cooler s equal openings may be placed in the standard lower front panel directly behind openings placed in the spoiler P A spoiler may be added to the rear of the car provided it complies with either of the following 2015 SCCA N
164. ontainer that retains any spillage or leakage LEVEL 2 PREPARATION LIMITED PREP VEHICLES Any mechanically driven oil pump can be used Chassis components may be modified to allow installation of the oil pump Dry sump systems are prohib ited L The components of the exhaust system are unrestricted Exhaust must be compliant with Section 3 3 3 B 16 and may exit through the body work Rocker panels may be modified for exhaust routing M Other Engine Components 1 5 The use of alternate engine components which are normally expend able and considered replacement parts such as seals bearings wa ter pumps etc is permitted Fasteners may be substituted Bushings may be installed where none are fitted as standard pro vided they are concentric and that the centerline of the bushed part is not changed The addition of alignment dowels is permitted Bush ings are required to be concentric so that unintended relocations and realignments are not permitted Gaskets may be replaced with others of unrestricted origin Alternator generator crankshaft and water pump pulleys may be altered or replaced by others of unrestricted origin One or more engine torque suppressors may be fitted Original torque suppressors may be altered replaced or removed 128 2015 SCCA NATIONAL SoLo RuLes P 17 PREPARED 6 Motor mounts of alternate design and or material may be used 7 The engine may not be relocated
165. oof etc or utilizes the OE panel mount points and that the contour of any replacement panel surface does not vary from the contour of the part being replaced by more than 1 0 25 4 mm in any direction The material used to construct the alternate panel and the method used to attach it to the interface is unrestricted Any actuation mechanism and the associated wiring if any may be re moved Vehicles utilizing alternate non OE hardtops will be consid ered as open cars in regard to Section 3 3 1 O Radio Stereo and airbag equipment and or its component parts includ ing wiring control modules antennas amplifiers speakers and their enclosures etc may be removed provided the part added removed or replaced serves no other purpose Any visible holes that result from the removal of equipment must be covered with a cover of unrestricted material Covers may be used to mount gauges switches etc P Any minor modification intended to allow or facilitate any allowed modification is permitted as long as it does not provide any intrinsic performance benefit in and of itself does not provide a weight reduc tion of more than 1 0 Ib and is not explicitly prohibited elsewhere within these rules This rule is intended to allow minor notching bending clearancing 2015 SCCA Nationa SoLo RuLE 111 16 STREET MODIFIED grinding the drilling of holes affixing relocating or strengthening of brackets removal of small parts an
166. or of the vehicle If used the 2 optional braces referred to in 2 shall be mounted one on either side from the forward section of the cage to the firewall or front fender wells No braces shall pass through the front firewall d Roll cages that utilize NASCAR style door bars that protrude into the door cavity must comply with the GCR roll cage requirements for production based cars e Roll cages which utilize door bars that protrude into the door pan el must comply with all Club Racing GCR requirements for roll cages Installation of roll cages in Street Prepared cars must follow the same standards for interior modifications to accommodate the cage installation as those which are applicable to Touring cars in Club Racing K The use of a fuel cell which complies with GCR requirements is permit ted provided all of the following additional restrictions are met 1 The capacity of the cell may differ by no more than 2096 from that of the original tank 2 The location of the cell may differ from that of the original tank by no more than 6 in any direction 3 The car meets all applicable Club Racing Time Trials Level 3 Track Trials and or Level 4 Hillclimbs safety standards including those for rollover protection and the installation of a fire extinguisher L Fuel tank changes are permitted only as allowed under Sections 15 1 C and 15 2 K No additional tanks or reservoirs may be used M Accelerator brake and clutch pedals may u
167. or replacement of suspension stabilizers linkage connect ing the axle housing or DeDion to the chassis which controls lateral suspension location is permitted 2 Traction bars or torque arms may be added or replaced 3 A Panhard rod may be added or replaced 4 The upper arm s may be removed replaced or modified and the up per pickup points on the rear axle housing may be relocated 5 The lower arms may be replaced or modified and the lower pickup points on the rear axle housing may be relocated 6 Differential covers and attaching hardware may be replaced 7 Methods of attachment and attachment points are unrestricted but may serve no other purpose e g chassis stiffening This does not authorize removal of a welded on part of a subframe to accommo date the installation 2015 SCCA NarionaL SoLo Rules 85 14 STREET TOURING H Camber kits also known as camber compensators may be installed These kits consist of either adjustable length arms or arm mounts in cluding ball joints that provide a lateral adjustment to the effective length of a control arm Alignment outside the factory specifications is allowed The following restrictions apply 1 On double unequal arm e g wishbone multi link suspensions only the upper arms OR lower arms may be modified or replaced but not both Non integral longitudinal arms that primarily control fore aft wheel movement e g trailing arm s or link s of a multi li
168. ork and mounted above the floor pan A metal bulkhead is required that provides to tal separation between the driver compartment and the compart ment containing the fuel tank and or filler neck This includes fuel tanks that are flush mounted with driver compartment panels or otherwise exposed to the driver compartment Fuel filler doors in the driver compartment must be positively fastened non metallic fasteners are not allowed For the purposes of these rules a fuel tank consisting of a structure containing a fuel bladder is consid ered to be the entire fuel cell including the containing structure The containing structure of a fuel cell does not qualify as a bulkhead A separate metal bulkhead must isolate the fuel cell from the passen ger compartment 2 Internal body panels may be modified to accommodate the instal lation of the fuel tank as long as such modifications serve no other purpose In the event installation includes encroachment into the driver s compartment a metal bulkhead shall prevent exposure of the driver to the fuel tank 3 Fuel tank breathers shall not vent into the driver passenger com partment R AII mirrors and their associated mounting hardware may be removed or replaced S The hood hatchback deck lid and fenders may be lightened or replaced by ones of alternate material provided the shape is similar to the orig inal and does not confuse the identity of the vehicle Factory bolt on 118 2015 SCC
169. ot permitted under this allowance 2015 SCCA NATIONAL SoLo Rules 89 15 SrREET PREPARED 15 STREET PREPARED CATEGORY Carsrunning in Street Prepared Category must have been series produced with normal road touring equipment capable of being licensed for normal road use in the United States and normally sold and delivered through the manufacturer s retail sales outlets in the United States Cars not specifi cally listed in Street Street Touring or Street Prepared Category classes in Appendix A must have been produced in quantities of atleast 1000 ina 12 month period to be eligible for Street Prepared Category A vehicle may compete in Street Prepared Category if the preparation of the vehicle has not exceeded the allowable modifications of Street Catego ry except as specified below However the distinction between different years models used in Street Category does not apply in Street Prepared Category Example Porsche 911 models that are listed on the same line are considered the same Cars listed as eligible in and prepared to the current Club Racing Improved Touring IT rules are permitted to compete in their respective Street Pre pared classes Neither Street Prepared nor Improved Touring cars are per mitted to interchange preparation rules Improved Touring cars may use tires which are eligible under current IT rules even if they are not eligible in Street Prepared Cars listed as eligible in and prepared to the curre
170. ow the strut length changes needed to accommodate permitted modifications which affect ride height and suspension travel This allowance differs from the Club Racing Improved Touring Allowance 9 1 3 D 5 b 1 D On strut suspensions using a non standard lower control arm as de fined by Section 15 8 H 2 an alternate upper spring perch seat and or mounting block bearing mount as described in Section 15 5 C may be used provided it offers no camber caster adjustment beyond standard 15 6 BRAKES Vehicles may only exceed the allowances of 13 6 as specified herein A Any brake line master cylinder vacuum brake booster or brake propor tioning valve that meets the requirements of 3 3 3 B 13 may be used This does not allow multiple separate cylinders A single master cyl inder brace may be added provided it is bolt on and serves no other purpose One additional hole may be drilled in brake pedal arm for relo cation of the master cylinder pushrod B Safety brakers and units such as the Brake Guard System are permit ted C ABS braking systems may be disabled but not removed brake boosters may be removed modified substituted or added D Alternate brake rotors are permitted subject to the following restric tions 1 Rotors must be ferrous metal except for standard parts Aluminum rotor hats are allowed Rotor dimensions diameter and thickness must be equal to or greater than standard parts Cars originally equipped with solid
171. placement WEIGHT ADJUSTMENTS LBS Solid Axle 50 Wheels greater than 10 wide up to 12 wide 100 Alfa Romeo 1600 GTV 1974 Alfetta GT 1976 79 Alt cyl head P N 19510 01053 04 Giuletta Sprint amp Spider 1570 cc Giulia 1300 amp 1300 Ti 1964 71 GT 1300 Jr amp GTA Jr 1966 77 GTA bore amp stroke 78 mm x 67 5 mm GTV 1750 2000 1967 77 Alt cyl head 19510 01053 04 twin plug add 100 lbs Junior Z Spider Duetto 1750 Spider Veloce 1779 cc 1969 70 Alt body part Niki Lauda Edition Spoiler Spider 2000 amp Spider 2000 Veloce 1962 cc 1971 76 Alt body part Niki Lauda Edition spoiler Sport Sedan Alt cyl head 19510 01053 04 twin plug add 100 lbs Sedans amp sports cars RWD NOC Alpine A108 A110 1100 Austin Healey amp MG 100 4 2660 cc Alt part louvered hood Fastrack News April 2015 202 2015 SCCA Nationat SoLo RULES APPENDIX A DP PREPARED MGA Twin Cam Allowed to replace wood floorboards with metal MGA Replace wood floorboards with metal MGB amp MGB GT Sprite Midget BMW 1600 1966 77 2002 2002ti amp 2002tii 1968 76 2000ti 1966 72 320i 3 Series E21 4 cyl 1975 83 3 Series E30 4 cyl 1984 93 3 Series amp M3 8v amp 16v E30 chassis 530i 1975 78 23 4 cyl Sedans RWD NOC Chevrolet Vega amp Cosworth Vega 1971 77 Datsun 1500 SPL 310 1600 SPL 311 311U amp 2000 SRL 311 Roadster Dodge amp Plymouth Colt amp
172. prings as long as they use the original mount locations Coil spring perches originally attached to struts or shock absorber bodies may be changed or altered and their position may be adjustable Spac ers are allowed above or below the spring B Suspension bump stops may be altered or removed C Suspension bushings may be replaced with bushings of any materials except metal as long as they fit in the original location Offset bush ings may be used In a replacement bushing the amount of metal rela tive to the amount of non metallic material may not be increased This does not authorize a change in type of bushing for example ball and socket replacing a cylindrical bushing or use of a bushing with an angled hole whose direction differs from that of the original bushing If the standard bushing accommodated multi axis motion via compli ance of the component material s the replacement bushing may not be changed to accommodate such motion via change in bushing type for example to a spherical bearing or similar component involving in ternal moving parts Pins or keys may be used to prevent the rotation of alternate bushings but may serve no other purpose than that of retain ing the bushing in the desired position Differential mount bushings are not considered to be suspension bushings and are not covered by this allowance D Differential mount bushings may be replaced but must attach in the fac tory location s without additional modifica
173. pt as prohibited herein Boost pressure changes re sulting from authorized changes are permitted D Traction and or stability control systems as defined in Section 12 12 must be standard parts at standard settings or electronically disabled E Air cleaner s may be changed or removed velocity stacks may be add ed F Emission control devices may be modified or removed This permits the oil filler cap to be modified or substituted but does not allow valve cov ers or cam covers to be altered to install a breather or for any other purpose G Intake water injection systems are allowed H Fuellines and pumps are unrestricted except as specified herein as long as they do not pose a safety hazard Fuel lines may be no larger than 12 12 7 mm i d inside diameter and may only connect to the original fuel tank or allowed fuel cell They may be no longer than necessary for reasonable and safe installation and may serve no other purpose A single fuel feed line may be used A single fuel return line may be used and a fitting for connecting it may be added at or near the top ofthe fuel tank This does not authorize cool cans I Exhaust manifolds and muffler systems are free except that they must be quiet and terminate behind the driver Section 3 3 3 B 16 Exhaust heat shields may be removed Rear and mid engine cars without ex haust headers manifold systems may use any exhaust system that meets the requirements of Section 3 5 This
174. r alterations are permitted 494 RAVE and non RAVE parts may not be interchanged between the two engines un less specifically noted 6 Competitors utilizing the Rotax 493 engine may leave the manufac turer s specified intake balance tubes in place or at their option completely remove the tubes and make the alterations required to plug the remaining holes No unnecessary alterations are permitted if the competitor chooses to remove the tubes The Rotax 493 engine is limited to a Y pipe exhaust manifold and single expansion cham ber as are the Rotax 494 and AMW engines 7 F5 cars may utilize the Rotax 593 engine 1999 and up bore 76 mm stroke 65 8 mm using 38 mm Mikuni roundslide carburetors as an alternate 2 cylinder 2 cycle liquid cooled engine in FM Such engines must use inlet tract restrictors Cometic gasket MA0242S 2015 SCCA Nationa SoLo Rules 227 MoniriED FM APPENDIX A P1020A one in each tract immediately after the carburetor Use of the 2003 and up HO SDI RS and E TEC 593 variants is not permitted 8 All F440 amp F500 engines may use any water thermostat It may be modified or completely removed as necessary to aid water cool ing The water bypass may be blocked and alternate water cooling plumbing may be used Electric water pumps may be used 9 F440 amp F500 cars in FM are not required in Solo to have the side pods now mandated by Club Racing if they were manu
175. rbon or ceramic compos ite brake components except pads are expressly prohibited Standard parts per Section 12 4 are exempt from this restriction A functional redundant emergency parking brake must be present D Drivetrain and related components induction ignition fuel systems etc are unrestricted except for the following limitations 1 Engine block or housings of rotary engines must be a production unit manufactured and badged the same as the original standard or optional engine for that model Badges that exist as market ing aliases for the manufacturer will be recognized as equivalents Swaps involving makes related only at a corporate level are not rec ognized as equivalents Models produced as a joint venture between manufacturers may utilize any engine from any partner in the joint venture provided that an engine from the desired manufacturer was a factory option in that particular model e g Eagle Talon avail able originally with either a Mitsubishi or Chrysler engine may use any motor from Chrysler or Mitsubishi This allows engine blocks manufactured as production units for sale in other countries such as Japan or Germany 2 Maximum engine displacements per class are specified in Appendix A 3 Fuel System a Any fuel line s may be used All non standard fuel line s pass ing through the passenger compartment shall be made of metal metal braided hose or equivalent e g Nomex Kevlar or nylon braided
176. re allowed above or below the spring Coil springs may in corporate spring rubbers Suspension bump stops may be altered or removed B Suspension bushings may be replaced with bushings of any materials except metal as long as they fit in the original location Offset bush ings may be used In a replacement bushing the amount of metal rela tive to the amount of non metallic material may not be increased This does not authorize a change in type of bushing e g ball and socket replacing a cylindrical bushing or use of a bushing with an angled hole whose direction differs from that of the original bushing If the stan dard bushing accommodated multi axis motion via compliance of the component material s the replacement bushing may not be changed to accommodate such motion via a change in bushing type for example to a spherical bearing or similar component involving internal mov ing parts Pins or keys may be used to prevent the rotation of alternate 84 2015 SCCA Nationa SoLo9 RULES 14 STREET TOURING bushings but may serve no other purpose than that of retaining the bushing in the desired position C The following allowances apply to strut type suspensions Adjustable camber plates may be installed at the top of the strut and the original upper mounting holes may be slotted The drilling of holes in order to perform the installation is permitted The center clearance hole may not be modified Any type of bearing or bushing
177. re than 4 0 10 2 cm from the com pressor inlet and must maintain the specified diameter for at least 124 2015 SCCA NATIONAL SoLo RULES 17 PREPARED inch 0 50 12 7 mm Induction system restrictors may be located within or be integral to the compressor housing provided that all dimensional requirements of 17 10 C 2 are maintained All inducted air must pass through this restrictor The diameter for the restrictor shall be as follows unless specified otherwise in Appendix A a XP No restrictor required b CP 52 mm 2 047 restrictor c FP 46 mm 1 811 restrictor 3 Only air to air intercoolers may be used They must fit completely within the bodywork They must be cooled only by the atmosphere The use of coolants such as water dry ice ice etc is prohibited 4 All turbocharged supercharged cars are restricted to a single tur bocharger supercharger The type size and model of turbocharger supercharger is unrestricted Fuel System 1 Any fuel line s may be used All non standard fuel line s passing through the passenger compartment shall be made of metal or met al braided hose or equivalent e g Nomex Kevlar or nylon braided hose with AN Series threaded couplings or entirely covered and protected with a metal cover N Any fuel pump s filter s and pressure regulator s may be used Such components may not be located in the passenger compartment but their location within the bodywork
178. re un restricted except as noted c The engine orientation transverse stays transverse and longitudinal stays longitudinal and the engine bay location must not be changed front engine stays front engine mid engine stays mid engine and rear engine stays rear engine d Any traction or stability control systems are permitted but incur a mini mum weight adjustment including standard parts e Air may be ducted to the induction system Openings in the bodywork to allow air to be ducted are allowed provided they serve no other pur pose 8 OTHER Vehicles exceeding these rules and prepared to the Club Racing GCR GTCS or PCS are not eligible for this class 9 MINIMUM WEIGHTS a ENGINE CLASSIFICATIONS 1 4 stroke cycle and 2 stroke cycle naturally aspirated internal com bustion engines will be classified on the basis of actual piston dis placement 2 Turbocharged or supercharged versions of all engines will be classi fied on a basis of 1 4 times the actual displacement 3 Rotary Engines Wankel These units will be classified on the basis of a piston displacement equivalent to twice the volume determined by the difference between the maximum and minimum capacity of the working chamber times the number of rotors b MINIMUM WEIGHT CALCULATIONS All listed weights are without driver All weights are calculated based on displacement as listed above EXAMPLE Weight for a RWD car w 1796 cc Turbo engine behind the driv
179. referenced in the factory service manual or in a service bulletin for the specific model See Sections 3 8 and 8 3 1 for documentation requirements Alternate components which are normally expendable and considered replacement parts e g engine and wheel bearings seals gaskets filters belts bolts bulbs batteries brake rotors clutch discs pressure plates suspension bushings drivetrain mounts fenders trim pieces fuel filler caps etc may be used provided they are essentially identical to the stan dard parts e g have the same type size hardness weight material etc are used in the same location and provide no performance benefit The allowance for use of such replacements does not include camshafts differ ential covers or ring and pinion sets nor does it authorize the use of pis ton rings having different configurations e g Total Seal from those ofthe original Hardware items nuts bolts etc may be replaced by similar items of un restricted origin Safety wire threadlocker compounds and locking nuts 2015 SCCA NarionaL SoLo Rules 71 13 STREET are permitted These allowances are strictly to allow components to be replaced from alternate sources other than the original manufacturer They should not be construed as an allowance to replace components with those which could be considered a higher performance alternative Parts available as replacements through the dealers parts department the
180. removed The number of carburetors must not be changed from OE b Standard or permitted alternate carburetor s can use an adaptor plate and or a spacer in addition to any standard spacer between the carburetor s and the intake manifold Material for the adap tor plate and spacer is unrestricted No adaptor plate or spacer can serve any purpose other than to space out and or mate the carburetor s to the permitted intake manifold The adapter or spacer cannot create a plenum or change the carburetor orien tation The maximum thickness for the adapter spacer standard spacer or combination of all is 174 inches 1 250 31 75 mm For the purpose of these rules an isolator is a spacer c Fuel Injection The standard throttle body must be retained and may not be modified The number of injectors must remain stan dard The mounting position and injection point must be stan dard In all other respects the fuel injection system is unrestricted d The intake manifold may be port matched on the port mating sur face to a depth of no more than 1 0 25 4 mm Balance pipes or tubes on all intake manifolds can be plugged or restricted The intake manifold cannot otherwise be modified C Induction System Turbocharged Supercharged Engines 1 Turbocharging and supercharging is prohibited except for specific vehicles as listed in Appendix A 2 Induction systems must have a restrictor on the inlet side This re strictor orifice must not be mo
181. rer Minor repositioning of the headlights is allowed to accommodate the alternate headlight but the unit may not be relocated and the repositioning may servce no other purpose All associated hardware may be removed replaced or modified T Alternate subframes are allowed to facilitate engine mounting only Sus pension pick up points on the subframe must retain standard geom etry Weight of the subframe must be equal or greater than the standard unit U Bolt on tow hooks and tie downs may be modified removed or re placed Addition oftow hooks and tie downs are permitted and location is unrestricted Non standard tow hooks shall serve no other function 16 2 MINIMUM WEIGHTS Classes displacements and minimum weights are listed in Appendix A For the purpose of determining minimum weights a mid engine vehicle is defined as one having a chassis configuration where the engine block is not located entirely in front of the driver s seat and is not far enough back to be considered a rear engine vehicle Adjustments to minimum weights are shown in Appendix A 112 2015 SCCA NarionaL SoLo RULES 17 PREPARED 17 PREPARED CATEGORY 17 0 A Intent It is the intent of these rules to allow modifications useful and necessary in the preparation of a high performance production based non street driven vehicle which is of unibody or tub based construction Tube frame cars are allowed subject to the requirements of 17 11 SCCA will
182. rmitted This permits locked differen tials either by design welding or mechanical means Differential cases 2015 SCCA NarionaL SoLo Rule 103 15 SrREET PREPARED internal differential parts and axle stubs may be machined as required for clearance and installation to the extent that material may only be removed not added and the exterior of the case may not be altered in any way This machining may serve no other purpose Any other modi fications or substitutions to accommodate the installation of the lim ited slip differential must meet the requirements of Section 15 1 B and 15 1 C R Cylinders may be rebored to no more than 0 0472 1 12 mm over standard bore and the appropriate standard oversize piston may be substituted This overbore dimension is an absolute limit no addition al tolerance is permitted to accommodate wear Cast or forged non standard pistons of the same dimensions and configuration as original equipment pistons may be used Additionally the replacement pistons must be of the same weight or greater as the original equipment pis tons Replacement pistons must match OE piston configuration exactly including quench area The allowance for the use of aftermarket forg ings vs OE castings does not permit alternate piston dome designs This allowance does not permit alternative ring configurations S Rotating and reciprocating parts may be balanced but not lightened T Intake and exhaust ports and manifold
183. rough normal or specifically authorized openings in the bodywork Headlight front parking light front sig nal light and similar standard openings in the front of the car may be used for ducting air to the engine and ducts may pass through interior panels for this purpose Standard openings in the front of 2015 SCCA Nationat SoLo Rules 123 17 PREPARED the car includes ventilation system intake grilles 2 Any throttle linkage may be used All throttle linkages shall be equipped with more than one system of positive throttle closure Any throttle pedal may be used 3 All inducted air with the exception of idle air shall pass through the throttle venturi s 4 LEVEL 1 PREPARATION FULL PREP VEHICLES a Unless specifically listed in Appendix A carburetors and fuel injec tion systems are unrestricted b Intake manifolds are unrestricted except that no portion of any intake manifold may extend into the intake ports of the cylinder head or rotary engine end plate 5 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Allinducted air must pass through the throttle body and be subject to control by the throttle butterfly All single carbureted cars may fit a permitted optional carburetor per Appendix A The standard or permitted alternate carburetor must not be modified Carbure tor jets needles metering rods and needle valves are unrestricted Choke mechanisms plates rods and actuating cables wires or hoses can be
184. ructure The containing structure of a fuel cell does not qualify as a bulkhead A sepa rate metal bulkhead must isolate the fuel cell from the passen ger compartment 2 Internal body panels may be modified to accommodate the in stallation of the fuel tank as long as such modifications serve no other purpose In the event installation includes encroach ment into the driver s compartment a metal bulkhead shall prevent exposure of the driver to the fuel tank 3 Fuel tank breathers shall not vent into the driver passenger compartment 4 Minimum capacity of a non standard fuel tank cell shall be no less than 5 gal 18 9 L Engine and drivetrain mounts are considered part of these allowances and any material is permitted The allowances of Section 16 1 P may be used to affix brackets but these brackets shall serve no purpose other than engine and drivetrain mounting e g they may not provide chassis stiffening E Suspension components are unrestricted as long as they use the origi nal attachment points For the purposes of this rule suspension is defined as any item that is designed to move when a wheel is deflected vertically This includes shocks struts control arms steering knuckles uprights etc but not tie rods steering racks and subframes In addi tion shock absorber strut upper mounts are to be considered suspen 2015 SCCA NATIONAL SoLo RuLe 109 16 STREET MODIFIED sion components E Steering mod
185. rules This rule is intended to allow minor notching bending clearancing and grinding the drilling of holes af fixing relocating or strengthening of brackets removal of small parts and similar operations performed in order to facilitate the installation of allowed parts or modifications Competitors are strongly cautioned to make the minimum amount of modification required to affix a given part and to not make tortured interpretations of this rule which will in voke Section 17 11 weight adjustments e g moving frame rails inboard regardless ofthe reason is considered to be a tortured interpretation Refer to Appendix F for past clarifications of these rules 17 2 BODYWORK AND STRUCTURE The purpose of the following rules is to maintain recognizable external features of the manufacturer s make and model while providing the nec essary safety and performance modifications Restrictions regarding ex ternal body shape and belly pans are aimed at preventing attempts to ob 114 2015 SCCA NarionaL SoLo RULES 17 PREPARED tain ground effects or streamlining A The external shape of the body may only be changed where specifically authorized Standard window openings rain gutters or approved fac similes shall be retained All external trim and model identification may be removed Grilles may be removed modified or substituted B Chassis frame or subframe may be reinforced provided components and attachments are not relo
186. ry are as follows 1 Fuel cells Windscreens side mirrors and tail stop lights Headlight covers lenses and bulbs Log books Fire retardant driver s suits Homologation Fuel test ports OND Ul FW N Production based dune buggies need not meet door require ments 2015 SCCA National SoLo Rules 135 18 MODIFIED 9 Running lights 10 Deformable structures as defined by the GCR Formula Atlantic rules 11 On board fire systems 12 Reverse gear in BM and FM vehicles 13 A front impact attenuation device GCR Section 9 4 5 G is not re quired in Solo Modified Category vehicles 14 Driver restraint system aging requirements GCR Section 9 3 19 G do not apply The 180 vision rule is recommended NOTE If any conflict exists between the Club Racing GCR and the Solo Rules the Solo Rules shall take precedence See Sections 3 8 and 8 3 1 for documentation requirements Refer to Appendix A for additional class specific vehicle preparation rules Refer to Appendix F for past clarifications of these rules The following types of cars are assigned to the Modified Category 18 1 MODIFIED PRODUCTION BASED CARS A Eligibility Modified classes D DM and E EM contain production based cars which are permitted additional modifications beyond those allowed in Prepared classes CP through FP Models must meet the requirements of Section 13 first paragraph be specifically listed in Appendix A meet the spec
187. s may be modified or replaced and may be attached with removable fasteners Associated hardware including latches hinges window washer system and hood liners may be modified removed or replaced J Tires legal in Street Street Touring or Street Prepared categories are permitted K Rear passenger seat s including restraints and associated hardware may be removed L Aerodynamic Aids Wings may be added removed or modified Non OE wings may only be attached to the rear deck hatch area behind the centerline of the rear axle The total combined surface area of all wings shall not exceed 8 sq ft 0 7432 m as calculated per Section 12 9 The number of wing elements is limited to 2 Wings and any component thereof may not extend beyond the vehicle width as defined by the outermost portion of the vehicle doors less mirrors door handles rub strips and trim In addition no portion of the wing or its components may be more than 6 0 forward of the rear axle more than 0 0 beyond the rear most portion of the bodywork or more than 6 0 above the roofline of the vehicle regardless of body style For convertibles and roadsters the highest portion of the wind shield frame will be considered the highest portion of the roof how 110 2015 SCCA NarioNAL SoLo RULES 16 STREET MODIFIED ever a convertible or roadster utilizing a hardtop will use the highest portion of the hardtop as the roofline Reinforcements to th
188. s must be used They may not be cut shortened or collapsed Spring perches may not vary from the OE shape within the working part of the perch B Both the front and rear suspension may be adjusted through their de signed range of adjustment by use of factory adjustment arrangements or by taking advantage of inherent manufacturing tolerances This en compasses both alignment and ride height parameters if such adjust ments are provided by the standard components and specified by the factory as normal methods of adjustment However no suspension part may be modified for the purpose of adjustment unless such modifica tion is specifically authorized by the factory shop manual C Suspension bushings including but not limited to those which carry the weight of the vehicle and determine ride height may not be replaced with bushings of a different material or dimension D Replacement control arms for vehicles having integral bushing arm as semblies must be standard manufacturer parts as per Sections 12 and 13 0 E If offered by the manufacturer for a particular model and year the use of shims special bolts removal of material to enlarge mounting holes and similar methods are allowed and the resulting alignment settings are permitted even if outside the normal specification or range of specifica tions recommended by the manufacturer If enlarging mounting holes is specifically authorized but no material removal limits are specified mat
189. safety Completely sealing all firewall openings is strongly encouraged but no gap may be larger than Y inch 0 125 3 2 mm except around dynamic devices extending through the fire wall e g throttle linkage transmission linkage or other mechanical devices and should be sealed to the extent that functioning of the de vice is not impaired No more than 8 0 20 3 cm clearance is allowed between modified firewall areas and above listed components The en gine block cylinder head turbochargers and or superchargers may not intrude into the clearance areas authorized herein G Bumper components not integral to the bodywork may be modified substituted with a replica of alternate material or removed provided all projecting hardware is also removed Bumper bracket holes in the bodywork may be covered provided such covering serves no other pur pose Bumper fascias integral with the bodywork may be modified or substituted with a replica of alternate material Internal bumper com ponents may be removed replaced or modified Modified or replica bumpers fascias must be of similar shape as standard components completely cover the area of the OE bumper fascia and not confuse the identity of the vehicle H All interior trim dash boards gauges floor covering carpet upholstery panels and similar non performance comfort or convenience items may be removed or replaced I The driver s seat may be replaced with a seat of any origin
190. se better strength per weight structural materials than those originally used in the corresponding places in the originals The only exception is the use of high carbon or chromemoly steel in place of mild steel D Drivetrain 1 Engines must be derived from production automobiles available in the US or elsewhere Complete race engines derived from produc tion automobile block designs such as the Pontiac Super Duty A and the Cosworth 16 valve series are allowed Motorcycle snow mobile marine or any other initially non automobile design is not allowed even if it was also made available in an automobile Non au tomobile engines are prohibited 4 stroke automobile motors shall not be converted to 2 stroke 2 Engine and or drivetrain changes are permitted within the follow ing limitations a Original front engine design must remain a front engine design i e no part of the engine block or cylinder head may extend rearward of the midpoint of the wheelbase b Original rear or mid engine designs may be interchanged with 140 2015 SCCA Nationa SoLo Rules 18 MobiFIED each other but no part of the engine block or cylinder head may extend forward of the midpoint of the wheelbase Non automobile CVTs are prohibited Automobile based CVTs are only allowed with their matching factory engine Internal and external components of the engine transmission and rear differential are unrestricted Any shifting mechanism or pat t
191. sed to comply with a sports racer classification F Aerodynamic restrictions for Formula Atlantic all open wheel in BM shall follow the 2013 Club Racing GCR with the following Solo allow ances 1 Wings and all other aerodynamic devices front and rear may match but shall not exceed sports racer maximum height 45 25 per GCR 9 1 9 Front wing width may match but shall not exceed overall front width as measured at the tires Rear wing width shall not exceed the Club Racing FA specs with the exception that endplate gurney lips are not included Endplate Gurney lips shall not exceed 2 75 additional width per side and shall not deviate more than 10 from vertical N SR Side pod or other parts not considered chassis are not required to attach or stay above aline situated 1 cm 0 4 above the chassis bot tom this is an exception to GCR 9 1 1 A 1 g 10 4 Flexible ground sealing is permitted on cars 66 wide or more at the rear tires and which also meet a weight of 1180 lbs G Formula S FS Must weigh appropriate Solo DSR weight if engine size is within DSR class limitations FS shall run to the appropriate For mula Atlantic rules if engine is larger than allowed in DSR All cars must prepare to Formula Atlantic aerodynamic rules as specified above in section F C Monro CM A Modified Class C CM allows the Solo Vee and the following SCCA Club Racing GCR compliant cars Spec Racer Ford SRF Formula F FF a
192. sfer heat and or inhibit freezing boiling and or corrosion A Corvair may use a water radiator Other modifications which may be involved in its use are not permitted unless explicitly allowed by the contents of Section 17 A radiator may be relocated so long as the other applicable items in Section 17 are not violated e g the exte rior bodywork is not altered to accommodate the change 3 Sealing or shrouding the airflow area between the normal grill open ing and the water radiator is permitted 4 On water cooled cars thermostats may be removed modified or re placed with blanking sleeves or restrictors 5 The direction of water flow through the engine shall not be changed from that which was original for the engine unless authorized in Ap pendix A 6 Electrically driven water pumps are allowed Alternate mechanical water pumps are not required to be of the same configuration as the original Electric water pumps may be relocated Transmission 1 The standard transmission without modification may be used 2 Any mechanical shift linkage or mechanism for changing gears may 2015 SCCA NarioNAL SoLo Rutes 129 17 PREPARED be used including use of lockout mechanisms The shift lever open ing in the body of the car may be altered to allow the installation of an alternate shift linkage 3 LEVEL 1 PREPARATION FULL PREP VEHICLES a Any non sequential manual transmission is allowed Any auto matic sequential trans
193. shaft and Valve Gear 1 Cam timing chains gears belts sprockets and associated covers are unrestricted 2 A timing chain belt tensioner may be added to those engines not originally so equipped provided that it acts upon that portion of the chain belt that travels from the crank drive to the first cam sprock et gear The timing chain cover may be modified to facilitate its use Adjustable cam timing sprockets are permitted 3 Any metal valves may be used Valve springs valve retainers keepers seals and adjusting shims are unrestricted 4 Pushrods are unrestricted except they must be made of metal 5 Any cam followers may be used 6 Any valve covers may be used 7 LEVEL 1 PREPARATION FULL PREP VEHICLES a Any camshaft s may be used b Valve sizes are unrestricted c Valve train rocker arms shafts and attendant assemblies such as rocker stud girdles are unrestricted 8 LEVEL 2 PREPARATION LIMITED PREP VEHICLES a Camshafts are unrestricted except for limits as described in Ap pendix A Where maximum valve lift is specified valve lift is mea sured at the valve with zero lash or clearance b Valve sizes are to remain standard unless specifically allowed in Appendix A c Rocker shafts when utilized in the same standard system can be replaced by an alternate shafts and are unrestricted Valve train rocker arms cam followers rocker ratios and rocker follower ratios must be standard H Block 1 T
194. shall remain OE standard OE standard heads shall be used however alternate VW heads with casting numbers 040 101 355 or 043 101 375 may be substituted Any single carburetor regardless of the number of venturis is per mitted Multiple carburetion is restricted to a maximum of two 44 mm carburetors with 28 mm ventures If a balance tube is used between manifolds runners it shall be restricted to one V 0 500 50 8 mm ID pipe Any intake manifold not having a plenum chamber is permitted OR 2 Increase bore up to and including 94 mm maximum per cyl inder total displacement of 1915 cc Machining to allow the installation of the cylinders is permitted No other combustion chamber machining such as but not limited to unshrouding of the valves is permitted Valve guide centers must remain OE standard Increased displacement engines up to 1915cc are restricted to maximum valve sizes 39 mm intake and 32 mm exhaust Port location may not be changed from OE standard 2015 SCCA Nationat SoLo Rules 221 MobiriED CM APPENDIX A OE standard heads shall be used however alternate VW heads with casting numbers 040 101 355 or 043 101 375 may be substituted A maximum compression ratio of 9 1 is permitted Compression ratio may be increased by additional machining of any factory machined surface on the cylinder heads only Any single carburetor may be used Multiple carburetors are prohibited Any intake manifold not having a pl
195. signed for highway use on passenger cars B Eligibility Requirements The following are prerequisites before a tire can be used in competition at National Solo events 1 Tire availability Tires are considered available when competitors can take possession through retail channels Pre orders are not con sidered available Tires must be equally available to all competitors Tires that are in short supply do not specifically violate Section 13 3 Extensive short ages may result in the tire being placed on the exclusion list until supply is replenished Tire variations differing from standard speci fication delivered only on a limited basis or only to selected com petitors may not be used Tire models must have tires available in at least 4 rim diameters and in at least 6 sizes which meet these requirements Material Change Tires which previously met the eligiblity require ments that undergo a significant compound change tread pattern change or other significant redesign reset the requirement for eligi bility described in Section 13 3 B A tire model which was previously allowed by these rules continues to be eligible for competition until specifically disallowed Reintroduction Models that were once discontinued will be consid ered a new model once reintroduced and must meet all the require ments of Section 13 3 C Other 1 Any tire which is OE on a car eligible for Street Category may be used
196. smetic pieces e g diffusers may be modified or removed to fa cilitate hitch installation Complete or partial removal of the hitch is allowed for competition provided it does not result in a reduction in weight compared to the unmodified standard configuration J Tow bar brackets may be installed but may serve no other purpose K Any item that cannot be held permanently in place by factory installed fasteners may be removed 13 3 TIRES Tires may be replaced with any size that fit the allowable wheels and fender wells without modification Tires may be excluded for but not limited to low volume production extensive availability limitations and specialty design Tires must meet the following requirements to be eligible for use in Street category No tire model will be eligible for Solo competition until it meets all requirements ofthis Section Tire models not meeting the requirements by April 30 are not eligible for Solo competition until after the Solo National Championships of the year 2015 SCCA NarionaL SoLo Rules 73 Fastrack News April 2015 page 13 13 STREET A Specifications 1 2 4 5 Minimum UTQG Treadwear Grade of 200 Minimum molded tread depth of 7 32 as specified by the manufac turer Listed in a current year or prior 2 years of the Tire Guide and or the Tread Design Guide www tireguides com US Department of Transportation DOT approval Tires must be de
197. t adjustment 2 Modified Tub a All attributes of a Stock Tub must be maintained in this category except as explicitly allowed below There is a weight adjustment associated with a modified tub A modified tub is one that mainly achieves a lower CG and im proved strength to weight ratio Lightweight replacement body panels a thinned down standard fiberglass body or a lift off lightweight shell attached to the main body structure are examples of a modified tub when done in the bulkhead to bulkhead region Vertical features above the bottom floor pan plane do not have to satisfy original minimum size or shape Note that the original width and length of the floor pan still have to meet the original dimensions Drivetrain tunnels and seat mounting platforms may be made smaller than standard with a Modified Tub weight adjustment A flat floor pan is legal Floor pan material and thickness are open under Modified Tub allowances Rear passenger doors if present may be replaced with non func tional panels Front and rear doors and door openings may be altered to accommodate compliant wheelbase changes All other cars Stock or Modified Tub whose factory wheelbase are less than 93 236 2 cm may still change their wheelbase 2015 SCCA Nationat SoLo Rules 139 18 MobiFIED but it must be done without violating the floor pan length as de termined by both front and rear factory bulkhead locations h All series of Lotus
198. t is listed in the vehicle manufacturer s US accessory catalog for that vehicle for normal highway use This does not allow for parts sold through a manufacturer s performance catalog e g Ford Racing 2015 SCCA NarionaL SoLo9 Rules 81 14 STREET TouRING HPD Mazdaspeed Mopar Performance Mugen NISMO SPT TRD etc Parts must be installed as directed by the manufacturer Exact replicas including weight from alternate sources are also permitted G Strut bars per Section 12 are permitted with all types of suspension subject to the following constraints 1 A 2 point strut bar may be added removed modified or substituted but only with another 2 point strut bar 2 A triangulated 3 point strut bar may be removed modified or sub stituted substitution may be with either a triangulated or a 2 point strut bar The connection to the chassis e g firewall bulkhead must be in the standard location 3 Lower suspension braces must be attached to the lower suspension pickup point locations on the chassis within 2 50 8mm in any di rection of the actual suspension attachment to the chassis 4 Except for standard parts no connections to other components are permitted Additional holes may be drilled for mounting bolts Only bolt on at tachment is permitted Interior trim panels may be modified to allow installation of strut bars Holes or slots may be no larger than necessary and may serve no other purpose
199. t scales and weight bias penalties as production based cars c They will be allowed all the modifications that production based cars are permitted d They are subject to the same engine and transmission restric tions as production based cars e They must meet the same safety requirements as production based cars A newly added model is not eligible for the current year s Solo Na tional Championships unless its listing was published no later than the July issue of the official SCCA publication The list of currently approved models is as follows Factory Five Racing 818 S amp R 2 Clones Clones replicas of SCCA recognized production cars are permit ted to compete in DM and EM provided they comply with the follow ing requirements a They are substantially similar to and recognizable as the original manufactured vehicle on which they are based b Their specifications do not violate any rule stated herein c A clone shall not benefit from kit car manufacturer running changes unless those changes have also been submitted and ap proved 3 Other Models The Panoz Roadster and Porsche 550 Spyder are eligible for compe tition in DM and EM as a modified production based car using the Modified Tub minimum weights 4 Specifications Weight and displacement specifications are as shown in Appendix A B Bodywork 1 Respecting Section 18 1 F Aerodynamic Aids bodywork may be modified beyond the allowances of Sect
200. tandard bumpers may be retained removed or replaced with al ternate materials The bumper if retained will contribute its con tour to the top view outline of the car for measurement purposes Bumpers made of alternate materials shall retain the shape and size of the original 8 Doors may be replaced with ones of alternate materials No other part of the original outside bodywork between the original pas senger compartment fore and aft bulkheads such as rocker pan els floor pan or frame shall have reduced thickness or be replaced with lighter material C Body and Frame 1 Stock Tub a No part of the original outside bodywork between the original passenger compartment fore and aft bulkheads such as rocker panels floor pan or frame shall have reduced thickness or be replaced with lighter material b A bulkhead is defined as a transverse panel that is a separator or step between the driver s compartment and the engine or main luggage area c In cars where a rear luggage compartment is not totally closed off from the passenger compartment the base of the floor pan step or base of a part height panel that would limit rearward travel of the rearmost of seat bottoms is the rear bulkhead point Ifthere are built in seat track catches or stops they are assumed disabled for this definition of travel d Heavier gauge material repairs or heavier replacement sections are all allowed as long as they closely resemble the original
201. ted or the equivalent forced induction engine size and weight MKIII GT40 MKII Shelby Cobra Daytona Coupe TVR Griffith Series 200 amp Series 400 198 2015 SCCA Nationat SoLo RuLEs APPENDIX A CP PREPARED C Preparep 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 manufac tured 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 Chrylser Dodge and Plymouth Alternate engines for a particular model must locate the bell housing to the block mounting surface in the same plane as the standard part Verti cal position ofthe longitudinal axis ofthe crankshaft shall remain the same as the original engine Tolerance for both measurements is 12 12 7 mm Alternate material e g aluminum engine blocks may be used on US produced 8 cyl engines Any altenate engine block sh
202. tem effective braking power shall be maintained on at least 2 wheels h A separate hand brake is not required Removal of the hand brake and operating mechanism is permitted i Brake lines may be of any suitable material including steel braid 2015 SCCA Nationat SoLo Rules 225 MoniriED DM EM APPENDIX A 9 ed lines WEIGHT Minimum weight with driver ENEE 1000 Ibs D MonirieD DM Modified Production and GT cars with internal combustion engine dis placement 2000 cc and under as follows A The Mazda 12A and 13B Rotary engines are permitted in DM with the following restrictions 1 2 LA No replacement of cast iron engine case segments with aluminum On the 12A engine only side and rotor housings from 1974 86 en gines shall be used No replacement of 12A or 13B sections such as side plates with those from other series engines i e Renesis type parts On 12A engines no peripheral porting or J porting is allowed Bridge porting that does not cut into the water o ring is permitted On 13B engines 4 amp 6 port Maximum porting permitted is street porting No bridge porting J Porting or peripheral porting B Weight w driver vs Displacement Piston engines up to amp including 1800 ce 1280 lbs 12A rotary engines w porting restrictlon 1280 Ibs Piston engines 1801 2000 cc ees 1380 Ibs 13B rotary engines w porting restriction
203. ther pollution control devices in the exhaust system are not allowed and the system must be operable Replacement catalytic converters must be OE if the vehicle has not exceeded the warranty period as mandated by the EPA Con verters must be of the same type and size and used in the same loca 78 2015 SCCA National SoLo RULES 13 STREET tion as the original equipment converter s This does not allow for a high performance unit If the vehicle has exceeded the warranty period replacement catalytic converters must be OE type as per Section 13 0 Exhaust hangers which are bolted or welded on the car are considered part of the body and may not be changed or removed D Any oil filter may be added if not originally equipped Canister type oil filters may be replaced with a spin on type filter using a minimum amount of hardware and connecting lines E The installation of water expansion tanks is allowed The installation of oil catch tanks is allowed provided the function of the PCV system is not altered E Thermostats may be added or substituted A thermostat is a device which controls the passage of water G Silicone replacement hoses are permitted as alternate components pro vided they meet the requirements of Section 13 0 with regard to size shape location and performance equivalence Replacement induction system air intake hoses must also match the standard part in stiffness contour and internal wall texture H A
204. tilize substitute covers of unrestricted origin shape and size provided they meet the following 2015 SCCA NATIONAL SoLo RuLe 95 15 SrREET PREPARED requirements covers must be securely attached provide a non slip surface not interfere with each other s operation and must be deemed safe at Tech Inspection A clutch pedal stop may be added N The OE radio may be removed The OE sound system components ex cept wiring may be removed Any visible holes which result from the removal of such equipment must be covered O Sunroof equipped cars may be converted to a solid roof configuration provided a model without a sunroof is listed on the same line in Ap pendix A P A non OE sunroof replacement panel may not be used in place of the OE sunroof Q Fog lights may be removed R Interior rear view mirror and sun visors and mounting hardware pro vided it serves no other purpose may be removed or replaced 15 3 TIRES Tires must meet the eligibility requirements for Street Category with the exception of Sections 13 3 A 1 13 3 A 2 and 13 3 A 5 Section 13 3 C 4 is replaced with the following list which may be altered at any time by the SEB upon notification of membership Kumho Ecsta W710 15 4 WHEELS Vehicles may only exceed the allowances of 13 4 as specified herein A Wheels of any diameter width or offset may be used Aftermarket wheels may be modified to install OE tire pressure sensors B Wheel spacers
205. tion or changes Differen 98 2015 SCCA Nationa SoLo RULES 15 SrREET PREPARED tial position may not be changed E Steering rack bushings may be replaced but must attach in the factory location s without additional modification or changes Steering rack position may not be changed The amount of metal in a replacement bushing may not be increased relative to the amount of metal found in a standard bushing for the particular application Solid metal bushings are specifically prohibited This does NOT allow shimming or otherwise relocating the steering rack E The following allowances apply to strut type suspensions Adjustable camber plates may be installed at the top of the strut and the original upper mounting holes may be slotted The drilling of holes in order to perform the installation is permitted but the center clearance hole may not be modified Any type of bearing or bushing may be used in the ad justable camber plate attachment to the strut The installation may in corporate an alternate upper spring perch seat and or mounting block bearing mount Any ride height change resulting from installation of camber plates is allowed Caster changes resulting from the use of cam ber plates are permitted G Camber bolts may be installed providing these parts use the original unmodified mounting points Caster changes resulting from the use of camber bolts are permitted H Camber kits also known as camber compensators may be
206. to 10 wide and any diameter may be used e Any anti roll bar may be used f Any air filter is allowed g Any ballast is allowed provided it is mounted securely per the Solo Rules h Any battery may be used i Engine does not need to be sealed but must conform to the ap 228 2015 SCCA NarionaL SoLo RULES APPENDIX A FM MobpiriED propriate rule set j Minimum weight w driver ENEE 1250 lbs 2 WSDCA US Legend Cars and Baby Grand specific items not required are as follows a INEX approved manufactured metal seat Mounting guidelines still apply b Seatbelt harness dating requirements c Quick release steering wheels d Fire extinguishers e Fire retardant driver suit and gloves f Neck braces g Head and neck restraints HNR 3 Current Solo Rules override WSDCA US Legend Cars and Baby Grand rules for the following items a Helmets b Car number and class designation c Exhaust system muffler and tailpipe 2015 SCCA Nationa SoLo RuLEs 229
207. uLes 119 Fastrack News April 2015 17 PREPARED B Wheel spacers may be used C Any wheel mounting stud or bolt may be used D The use of center lock wheels and hubs is permitted E A manufacturer s standard wheel size exceeding the listing in Appendix A may be used and must remain axle specific relative to standard size wheels with no additional weight Track dimensions must comply with ES o cb in SE EEN L 17 4 A are allowed with no additional weight increase be yond those specified E For classes CP any diameter and width wheel may be used without ad ditional weight adjustments G For classes DP EP and FP wheels up to 10 wide are allowed with no weight increase Wheels greater than 10 wide will receive a 100 Ib increase 17 5 SHOCK ABSORBERS amp SPRINGS A Bump stop rubbers and bracketry may be removed or replaced with others of unrestricted origin B Electrically controlled active shocks are prohibited C LEVEL 1 PREPARATION FULL PREP VEHICLES 1 Any springs or torsion bars may be used Spring seats and points of attachment may be replaced or altered Adjustable spring perches are permitted 2 Alternately all cars may fit coil over type springs with tubular load bearing shock absorbers or struts The shock absorber or MacPher son Chapman strut shall be installed inside the spring Such items shall not exceed one shock strut per wheel When load bearing shocks are used the
208. ull back bucket type automobile seat incorporating a func tional headrest Kart seats low back dune buggy seats and other simi lar types of seat are expressly prohibited Cars may have no fewer than the standard number of seats The seat tracks are considered part of the seat and may be substituted Alternate seat tracks may serve no other purpose The standard seat belts may be removed to facilitate the installation of alternate restraints complying with safety require ments An alternate seat which replaces an airbag equipped seat is not required to have an airbag G Any steering wheel may be used An alternate wheel which replaces an airbag equipped wheel is not required to have an airbag An alternate wheel is not required to have a horn button H Airbags may be electrically disabled but not removed unless explicitly allowed I Spoilers splitters and cosmetic trim pieces are permitted Side skirts may not be used Spoilers splitters must comply with the following 1 A spoiler splitter may be added to the front of the car below the bum per It may not extend rearward beyond the front most part of the front wheel well openings and may not block normal grille or other openings or obstruct lights Splitters may not protrude beyond the bumper Openings may not be used for the purpose of ducting air to the radiator or oil cooler but they may allow air to flow through a permitted oil cooler provided no ducting is used The spoiler may not
209. use the following guidelines in the determination of suitability for classifi cation in the Prepared Category 1 Cars classified shall retain their original design structure and drive layout unless otherwise specified in these rules If in doubt about a modification competitors should ask If the rules do not specifically authorize a modification it is not permitted N Cars running in Prepared Category must have been series produced with normal road touring equipment capable of being licensed for normal road use in the United States and normally sold and de livered through the manufacturer s retail sales outlets in the US Cars not specifically listed in Prepared Category classes in Appen dix A must have been produced in quantities of at least 1000 in a 12 month period to be eligible for Prepared Category LA SCCA may also class suitable non production full bodied full fen dered strictly specified cars into this category Production quanti ties EPA approval and DOT approval are not required SCCA may choose not to classify any such vehicle it deems unsuitable for the Prepared category 4 Within the scope of these rules the definitions provided in Section 12 apply Specific allowances in Appendix A for a listed model supersede the limitations of Section 17 Minimum weights shall be established making it possible for all cars to reach minimum weight with reason able modifications The SEB recognizes that low m
210. ust have a minimum catalyst density of 100 cells per inch and minimum substrate length of 3 76 2 mm F The engine management system parameters and operation of internal combustion engines may be modified only via the methods listed be low These allowances also apply to forced induction cars except that no changes to standard boost levels intercoolers or boost controls are permitted Boost changes indirectly resulting from allowed modifica tions are permissible but directly altering or modifying the boost or turbo controls either mechanically or electronically is strictly prohib ited Traction control parameters may not be altered Any OE OBD2 or newer communications port functionality must remain The Check En gine Light CEL or Malfunction Indicator Light MIL may be disabled via software Alternate software maps which violate these restrictions may not be present during competition regardless of activation Only OE sensors may be used for engine management 1 Reprogrammed ECU PCM via hardware and or software may be used in the standard housing 2 Supplementary Piggyback ECU may be used subject to the follow ing restrictions a Connects between the standard ECU PCM and its wiring harness only b Must be plug compatible with the standard ECU PCM no splices Electronic components may be installed in line between an engine s sensors and ECU PCM These components may alter the signal com ing from the s
211. ut must attach in the stan dard location s without additional modification or changes Subframe position may not be changed E Longitudinal fore aft subframe connectors SFCs are permitted with the following restrictions 1 They must only connect previously unconnected boxed frame rails 2015 SCCA NarioNAL SoLo Rute 93 15 SrREET PREPARED on unibody vehicles Each SFC must attach at no more than three points on the unibody e g front rear and one point in between such as a seat mount brace or rocker box brace 3 SFCs must be bolted or welded but welding must be to the OE sub frame stampings not to the floor pan in between 4 No cutting of OE subframes or floorpan stampings is permitted Drill ing is permitted for mounting bolts only 5 No cross car lateral triangulated connections directly between the driver s side and passenger s side SFCs are permitted Connections to OE components such as tunnel braces or closure panels via bolts are allowed and count as the third point of attachment No alteration to the OE components is permitted 6 SFCs may not be used to attach other components including but not limited to torque arm front mounts or driveshaft loops and may serve no other purpose E The driver and front passenger seats may be replaced with the follow ing restrictions Seats must be securely mounted per Section 3 3 3 B 3 The seating surface must be fully upholstered Any replacement seat must be a f
212. xcluded from SM for failure to meet weight requirements c Excluded Vehicles Lotus except Elise Exige amp Esprit two seat cars not eligible for the Street Prepared category d Included vehicles Porsche Carrera GT 3 STREET MODIFIED FWD SMF All front wheel drive vehicles See Sections 3 8 and 8 3 1 for documentation requirements 2015 SCCA NarionaL SoLo RuLe 107 16 STREET MODIFIED 16 1 ALLOWED MODIFICATIONS A All Street Street Touring and Street Prepared category modifications are authorized Except as noted by these rules and the referenced rules vehicles must be as originally delivered including all road going com ponents such as lights wipers interior heater etc B Competitors may pick and choose between all Street Street Touring Street Prepared and Street Modified category allowances when pre paring a Street Modified category car Apparent conflicts between in herited rule sets from Section 16 1 A shall not prohibit any specific in herited allowance Allowances inherited from Section 16 1 A may not incorporate Street Modified specific allowances Foreign spec parts may not be used to substitute for parts which are required to remain standard C Brakes including calipers caliper mounts disks drums lines back ing plates pedals boosters master cylinders handles ABS systems proportioning valves etc are unrestricted Brake rotor drum friction surfaces must be 10096 ferrous metallic Ca
213. y Holes may be drilled for mounting or pas 100 2015 SCCA NATIONAL SoLo RuLes 15 SrREET PREPARED sage of cables Longer or shorter cables may be substituted to permit relocation The number of battery or batteries may not be changed from standard The area behind the rearmost seat is not considered to be within the passenger compartment The area under the rearmost seat is considered to be within the passenger compartment D Any starter generator or alternator may be used in the original posi tion An alternator or generator must have an electrical output includ ing amperage equal to or greater than the original equipment unit Any generator or alternator pulley and belt of the same type as stan dard may be used see Section 15 10 Y E Wiring harnesses may not be removed in whole or in part Wiring con nectors for emissions control devices are considered part of the har ness not part of the emissions control system and may not be removed Connectors may be changed for compatibility with allowed aftermarket components such as ignition coils Pigtails may be used F A hole may be drilled in the firewall to permit passage of electrical wir ing It should be no larger than necessary and shall serve no other pur pose 15 10 ENGINE AND DRIVE TRAIN Except for those with electric and hybrid powertrains vehicles may only exceed the allowances of Section 13 10 as specified herein A Engines must retain standard type lu
214. za 2 5 non turbo Toyota Celica All Trac Turbo Celica GT 2000 05 Celica GTS 2000 03 Volkswagen 1 8L Turbo models NOC 2002 06 Beetle amp New Beetle 1 8L Turbo Corrado Golf GTI amp Jetta 1 8L Turbo Golf GTI amp Jetta VR6 24v 2002 05 GTI 2006 15 Jetta 2 0L Turbo 2006 15 Passat 1 8L Turbo 2015 SCCA NATIONAL SoLo Rules 169 STREET APPENDIX A GS CONTINUED Passat W8 Volvo S60R except Polestar V70R except Polestar Turbo models NOC 3Fastrack News March 2015 170 2015 SCCA NATIONAL SoLo RuLEs H Street cLass HS Acura CL all Integra all except Type R 1986 2001 Legend RSX non Type S TL TSX Vigor Alfa Romeo 164 non S 1991 93 1300 1600 1750 amp 1750 GTV 2000 4 door sedan GTV V6 Milano Sedan NOC AMC Gremlin 4 cyl amp 6 cyl Spirit 4 cyl amp 6 cyl Audi 80 90 100 non S4 200 Turbo quattro 4000 5000 non turbo 5000 Turbo A3 FWD 2006 13 Coupe quattro non turbo S4 100 CS chassis 1992 94 Austin Mini Austin Healey all Buick Reatta BMW 1600 1800 2000 CS coupe 7 Series 6 cyl HS CONTINUED Cadillac Catera Chevrolet Aveo Beretta NOC Camaro 4 cyl amp 6 cyl 1967 2002 Chevette Cobalt 2 2L all 2005 10 Corvair all Cruze Nova FWD 1986 88 Nova RWD 4 cyl amp 6 cyl 1962 79 Sonic 2012 15 Spectrum Sprint Vega amp Cosworth Vega Volt 2012 15 Chrysler 300M 1999 2004

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