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| Intake must be present, but any type allowed. | |||
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Cars running in Stock 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. Except for modifications authorized below, Stock Category cars must be run as specified by the factory with only standard equipment as defined by these Rules. This requirement rrefers 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 Prepared, Street Touring, Prepared or Modified Categories as appropriate. 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 of this Section. The entrant has the burden of proving that his car conforms to these Rules by his owner's manual, manufacturer's shop manual, manufacturer's catalogs or other official manufacturer's documentation, which must be in the possession of the entrant at the event. At a minimum, the competitor must be in possession of the manufacturer's workshop manual. All manuals, catalogs and official documentation must be for non-competition purposes. If a protested competitor possesses the documentation required, but that documentation does not include sufficient information on the protested item, the burden shifts to the protesting competitor to prove the item illegal. Failure to provide appropriate manufacturer's documentation regarding vehicles specifications will result in disqualification. (Yoda's Note: This paragraph is aimed at major Regional & National-event competitors where things like contingency money, sponsorship and such is on the line; it is not a problem at local events as people are there to have fun. Have your owner's manual handy, in the very rare case someone actually has a problem with something on your car) Alternate (non-OE) components which are normally expendable and considered replacement parts (e.g. engine and wheel bearings, seals, gaskets, etc.) may be used provided they are the same type and size as the standard parst and used in the same location. This does not include camshafts or ring-and-pinion sets. Hardware items (nuts, bolts, etc.) may be replaced by similar items of unrestricted origin. 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 departments, the factory, or any other source which do not meet standard part specifications (e.g. hardness, size, etc.) are not legal in Stock Category, except as specifically provided elsewhere in these rules. Substitution of clutch and brake hydraulic lines with solid metal or braided metal is allowed on all cars manufactured before model year 1992. Authorized Modifications If a modification is not specifically authorized in this or previous sections of these Rules it is not allowed. It is not permitted to use illegal parts even if they have been set to stock specifications. 1. Body Work A. Accessories, guages, indicators, lights and other appearance, comfort and convience modifications which have not 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. This does permit the installation of an installation of an additional mirror (e.g. a "Wink"), but does not allow the removal of the original mirror. B. Hood straps or fasteners may be added. C. Any fuel tank cap may be used. D. Windshields may be folded (but not removed) provided the required mechanism is standard equipment. E. For cars designated model year 1990 and earlier alternate steering wheels are allowed provided the outside diameter is not changed by more than one inch from standard size, except that steering wheels with an integral airbag may not be changed. F. Spare tires, tools and jacks may be removed. G. Driver restraints are allowed. Seats may not be cut to allow for the installation of alternate seat belts or harnesses. Passive restraint systems many not be removed. A horizontal telescoping "harness bar" may be used as part of the installation hardware for allowed driver restraints. It may serve no other purpose (e.g. structural enhancement). H. Cars may add one rear trailer hitch. The resulting weight addition is allowed. The hitch may serve no other purpose. Factory tie downs may be removed to facilitate hitch installation. I. Tow bar brackets may be installed but may serve no other purpose. J. Any item that can not be held permanently in place by factory installed fasteners may be romved. 2. Tires Any tire which is OEM on a car eligible for Stock Category may be used. Non-OEM tires must meet the following requirements to be eligible for use in Stock Category: A. The tire must not appear on the following list, which may be altered at any time by the SEB (Solo Equipment Board) upon notification of membership. No tire models are currently listed. No tire models will be approved for competition during the rest of the year after April 30 of each calendar year. Each eligible tire model msut meet all requirements of this Section by April 30, and must continue to meet them thereafter. A tire model will normally be determined by the designation in the Tire Guide. However, any of the following changes or similar changes (as determined by the SEB) will also be considered to represent a new model for eligibility purposes, even if the designation does not change: change of tread pattern at either full or partial tread depth; characterization by the manufacturer or distributor of a tire as "new" after April 30. Discontinued model tires already produced will continue to be eligible for Solo II competition in Stock and Street Prepared categories. This follows years of precedence on eligibility for discontinued tire models. If a manufacturer reintroduces a tire model which was previously discontinued, that tire will be considered a new model. Therefore, it will have to meet the rules specified in this Section including the April 30 introduction date. B. The model of the tire must be listed in a current or previous two years of the Tire Guide and Tread Design Guide, or otherwise be approved by the SEB. The tire model must have Department of Transportation approval. C. Within each tire model, the sizes which are available must be equally available to all competitors. Tire model variations differing from standard specification, delivered only on a limited basis, or only to selected competitors, may not be used. D. No racing tire or recap (on any casing) may be used. E. Each tire model must be sold in at least four diameters, with a total of at least six sizes. F. The tire must fit the allowable wheels and fender wells without modifcation. G. No portion of the tread may extend beyond the fender opening when viewed from the top perpendicular to the ground. In those cases where the original equipment is such that it does not comply with this requirement, it is considered permissible for alternate tires to extend beyond the fender opening when viewed from above. H. When inspected at Safety Inspection, each tire must have measurable tread depth (i.e. points where it is possible to obtain positive measurement values) at points as described in the following section. The entrant is required to compete on inspected tires. Failure to comply with this rule will result in disqualification. I. Each tire must have the minimum tread as defined above at two points on the tire, which are 180 degrees apart around its circumference, and which are within the center one-half of the tread surface that normally contacts the ground. Additionally, the measurement points must be within tread grooves along a longitudinal or perimeter direction on the tire as typically found on normal road tires, rather than within measurement holes as typically found on racing slick tires. Tires may not be regrooved, nor may additional grooves be added to the tread pattern where none existed on the original tire. J. Tires may not have cord visible at any time during competition, even if previously approved at Safety Inspection. 3. Wheels A. Any type wheel may be used provided it complies with the following: it is the same width and diameter as standard, and as installed (including whell spacers if applicable) it does not have an offset more than +\- 0.25 inch from a standard wheel for the car. The resultant change in track dimensions is allowed. B. Wheel spacers are permitted, provided the resultant combination complies with the offset requirements of this section. Wheel studs or bolt length may be changed. 4. Shock Absorbers (Yoda's note: includes struts) A. The make of shock absorber may be substituted providing that the number, type (e.g. tube, lever, etc.), system of attachment, and attachment points are not altered. B. The mounting hardware shall be the original type. To facilitate the installation of commonly avaible aftermarket shock absorbers, struts or strut inserts whose shaft is larger than the center hole of an upper shock mount assembly, that hole may be enlarged by the minimum amount necessary to accomodate the shock shaft size, provided the following restrictions are met: (1) the enlarged hole must remain concentric with that of the original configuration; (2) the enlargement of the hole does not require modification of a bearing (as opposed to a washer, plate, or sleeve); (3) neither the hole enlargement nor the location of the shock shaft changes any alignment parameter. C. The use of any shock absorber bushing material, including metal, is permitted. This does not permit the use of an offset shock aborber bushing. D. The interchange of gas and hydraulic shock absorbers is permitted. Electronically controlled shocks may not be used on vehicles not originally equipped with such units. Vehicles originally equipped with electronically controlled shocks may use non-electronically controlled alternatives subject to requirements of this section. E. Shock absorbers with adjustable spring perches which have been welded in the stock position on the shock absorber are permitted. F. The dimensional characteristics of the shock and relative placement of the spring must remain as stock. If the spring perch on an aftermarket shock/strut is a small amount (e.g. 1/4") lower than the standard part, but the shock/strut otherwise complies with the requirements of this Section, a shim may be added to the spring perch to raise the spring base to the correct height. This shim must be permanently attached to the perch. G. Suspension geometry and range of travel may not be altered. H. The bushing attaching the end of the strut to the body or frame on a strut type suspension is a suspension bushing, not a shock absorber bushing. Suspension bushings, including but not limited to those which carry the weight of the car and determine ride height, may not be replaced with bushings of a different material or dimension. I. Non-standard electronically controlled active shocks are not allowed. 5. Brakes The make and material of brake linings may be changed. 6. Anti-roll (Sway) Bars A. Front anti-roll bars: 1. Substitution, addition or removal of any front anti-roll bars is permitted. 2. Substitution, addition or removal of anti-roll bars may serve no other purposes than that of an anti-roll bar. 3. The use of any bushing material is permitted. 4. No modification to the body, frame or other components to accomodate anti-roll bar addition or substitution is allowed, except for the drilling of holes for mounting bolts. B. Rear anti-roll bars 1. May not be removed, replaced or modified in any way. 6. Suspension Standard, as defined herein, suspension springs must be used. They may not be cut, shortened or collapsed. Both the front and rear suspension may be adjusted through their designed range of adjustment by use of factory adjustment arrangements or by taking advantage of inherent manufacturing tolerances. However, no suspension part may be modified for the purpose of adjustment unless such modification is specifically authorized by the factory shop manual for non-competition purposes. If authorized by the manufacturer, 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 or specifications recommended by the manufacturer. If enlarging mounting holes is specifically authorized but no material removal limits are specified, material removal is restricted to the amount necessary to achieve the maximum factory alignment specification. 7. Electrical System A. The make of spark plugs, points, ingnition coil and high tension wires is unrestricted including spark plug wires having an in-line capacitor. B. Ignition settings may not be adjusted outside factory specifications. C. No changes are permitted to electronic engine management systems or their programming. 8. Engine & Drive Train A. The engine air filter element may be removed or replaced. A replacement element which is taller than standard may not be used to hold the air cleaner cover open. No other compoinents of the air induction system may be removed, replaced or modified. B. Engines may be rebored to the manufacturer's first standard overbore, not to exceed 0.020". Sleeving is allowed to repair the standard bore. Only OEM-type standard or first 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. Rotating and reciprocating parts may not be balanced. D. Port matching is not allowed. E. Any part of the exhaust system beyond (downstream from) the header/manifold or catalytic converter, if so equipped, may be substituted provided the system meets the requirements of 3.5 (refer to actual Solo rules). 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 other pollution control devices in the exhaust system are not allowed and the system must be operable. Replacement catalytic converters must be OEM if the vehicle has not exceeded the five-year/50,000 mile warranty period as mandated by the EPA (Environmental Protection Agency). Converters must be of the same type and size and used in the same location as the original equipment converter. This does not allow for a high performance unit. If the vehicle has exceeded the five-year/50,000 mile warranty period, replacement catalytic converters must be OEM-type as per this Section. F. 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. G. The installation of water expansion tanks is allowed. The installation of oil catch tanks is allowed provided the PCV system is not altered. H. A scattershield may be added. I. Thermostats may be added or substituted. A thermostat is a device which controls the passage of water. J. A device for locking out reverse gear may be used. K. Limited-slip differential, transmission and differential ratios, clutch mechanisms, carburetion, fuel injection, or supercharger induction systems must be standard as herein defined. L. Any oil or grease, including synthetic, is permitted. Cars running 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 specifically listed in Stock or Street Prepared Category classes in Appendix A must have been produced in quantities of at least 1000 in a 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 exceede the allowable modifications of Stock Category, except as specified below. However, the distinction between different years/models used in Stock Category does not apply in Street Prepared Category. Example: Porsche 911 modesl that are listed on the same line are considered the same. 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. The SCCA does not encourage or condone the breaking of laws governing pollution control systems or the alteration of street-driven vehicles contrary to state and federal laws regarding their use. It continues to be the responsibility of the individual to comply with such state and federal laws. 1. Authorized Modifications A. All allowable modifications permitted in Stock Category are allowed. B. Street Prepared vehicles may only be modified in excess of Stock Category rules in the following ways. Any modification not specifically authorized by the Stock Category or Street Prepared rules is prohibited. No unauthorized modifications are permitted in order to accommodate authorized modifications (i.e. non-stock hood scoops or holes necessary 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 par or the part to whcih it is to be attached may not be altered, modified, machined or otherwise change to facilitate the updating/backdating allowance. The updating and/or backdating of engines transmissions or transaxles must be done as a unit; component parts of these units may not be interchanged. Cars not listed in Appendix A may not be updated/backdated until approved by the SEB and published in SportsCar magazine. D. Alternate computer control modules may be used whenever an equivalent change to the conventional system is allowed. For example, alternate computer module control of ignition settings or fuel injection is allowed. E. Air conditioning sytems may be removed in whole or in part. This rule should not be interpreted to allow modification of the heater system. 2. Bodywork A. Fenders and bumpers may be modified for tire clearance. Flares may be added although tires may extend beyond the bodywork. Replacement of complete flared fenders or quarter panels is prohibited. B. Removal of factory trim is only permitted if the resultant configuration is an allowed updated or backdated. C. Strut (and shock) bars are permitted with all types of suspension. Strut bars may be mounted only transversely across the car from upper right to upper left suspension mounting point and from lower right to lower left suspension mounting point. No other configuration is permitted. Additional holes may be drilled for mounting bolts. Only bolt-on attachment is permitted. D. Any fully padded and upholstered front seat may be used. This does not permit the substitution of a passenger's seat with a child or miniature seat of any type. Any substituted passenger's seat must be sufficiently large and strong to be capable of adequately accomodating an adult, such that it could be used as the driver's seat. The OEM seat belts may be removed to facilitate the installation of alternate restraints complying with safety requirements. E. Any steering wheel may be used. F. Spoilers and cosmetic trim pieces are permitted. Side skirts may not be used (unless equipped as such from factory). Spoilers must comply with the following subsections. The intent of this allowance is to accommodate commonly available appearance kits, and replicas thereof, which have no significant aerodynamic function at Solo II speeds. 1. A spoiler may be added to the front of the car below the bumper. 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. 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 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. It is a production rear spoiler which is standard or optional equipment of a U.S. model of the vehicle, or an exact replica in an alternate material. b. It is a non-production rear spoiler which is mounted to the rearmost portion of the rear hatch, deck, or trunk lid. The spoiler may extend no more than 10 inches from the original bodywork in any direction. The spoiler may be no wider than the 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. G. The use of a fuel cell which complies with GCR requirements is permitted, provided all of the following additional restrictions are met: 1. The capacity of the cell may differ by no more than 20% from that of the original tank. 2. The location of the cell may differ from that of the original tank by no more than six inches in any direction. 3. The car meets all applicable Solo I safety standards, including those for rollover protection and the installation of a fire extinguisher. H. Accelerator, brake and clutch pedals may utilize substitute covers of unrestricted origin, shape and size, provided they meet the following 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. 3. Tires Tires must meet the eligibility requirements for Stock Category with the following exception: the list of non-eligible tires in the Stock Category is replaced with the following list, which may be altered at any time by the SEB upon notification of membership. No tire models are currently listed. (Yoda's note: refer to current Solo II rules for latest tire information) 4. Wheels A. Wheels of any diameter, width, or offset may be used. B. Wheel spacers are permitted. Wheel studs and knock-off wheel drive pegs may be changed in length and diameter. Wheel bolts may be replaced with studs and nuts. 5. Shock Absorbers (and struts) 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, provided they attach to the original mounting points. The number of shock absorbers shall be the same as Stock. No shock absorber 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. 6. Brakes Any brake line, single or dual master cylinder, vacuum brake booster, brake proportioning valves may be used. This does not allow multiple separate cylinders, but does allow for any single, dual-circuit cylinder. "Safety breakers" and units such as the "Brake Guard System" are permitted. ABS braking systems may be disabled, but not removed; brake boosters may be removed or added. Air ducts may be fitted to the brakes, provided that they extend in a forward direction only, and that no changes are made in the body/stucture for their use. They may serve no other purpose. Backing plates and dirt shields may be modified or removed. 7. Anti-roll (Sway) Bars Any anti-sway bar is permitted. Bushing material, method of attachment, and locating points are unrestricted. 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. 8. Suspension A. Ride height may only be altered by suspension adjustments, the use of spacing blocks, leaf springs 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. Coil spring perches originally attached to struts or shock absorber bodies may be changed or altered, and their position may be adjustable. Spacers 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 bushings may be used. In a replacement bushing the amount of metal relative 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 fromt hat of the original bushing. If the Stock bushing accommodated multi-axis motion via compliance 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 internal moving parts. Pins or keys may be used to prevent the rotation of alternate bushings, but may serve no other purpose than that of retaining the bushing in the desired position. D. On vehicles with 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 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 installation of camber plates is allowed. Caster changes resulting from the use of camber plates are permitted. E. Addition or replacement of suspension stabilizers (linkage connecting the axle or De Dion to the chassis, which controls lateral suspension location) is permitted. Traction bars or torque arms may be added or replaced. A panhard rod may be added or replaced. Methods of attachment and attachment points are unrestricted. F. 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 part C of this Section are allowed, including those resulting from a change in the pivoting action to (a) about the mounting bolt, or (b) about the bushing itself. 9. Electrical System A. Any ignition setting, adjustment, or system may be used. 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 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 mounting or passage of cables. Longer cables may be substituted to permit relocation. The number of battery or batteries may not be changed from stock. The area behind the rearmost seat is not considered to be within the passenger compartment. D. Any starter, generator or alternator may be used in the original position. An alternator or generator must have an electrical output equal to or greater than the OE unit. Any generator or alternator pulley and belt of the same type as standard may be used. E. Wiring harnesses may not be removed in whole or in part. Wiring connectors for emissions control devices are considered part of the harness, not part of the emissions control system, and may not be removed. 10. Engine and Drive Train A. Engines must retain standard type lubrication system, but may have any oil pan (Accusump-type systems allowed), oil pump and pickup, oil coolers, oil and fuel filters. 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. B. Heat shields may be added. C. Carburetors, fuel injection, intercoolers and intake manifolds are unrestricted. Alternate throttle linkage and connections to facilitate installation of allowed induction systems are permitted, but may serve no other purpose. As utilized only on engines originally equipped with forced induction, air-to-air heat exchangers (known as "intercoolers"), and radiators which are part of air-to-liquid charge coolers, must be cooled only by the atmosphere. The use of chilled liquids, ice, dry ice, refrigeration systems, vaporized compressed gases, etc. is prohibited. 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. D. Air cleaner may be changed or removed, velocity stacks may be added. E. Emission control devices may be modified or removed. This permits the oil filler cap to be modified or substituted, but does not allow valve covers or cam covers to be altered to install a breather or for any other purpose. F. Intake water injection systems are allowed. G. Fuel lines and pumps are unrestricted as long as they do not pose a safety hazard. This does not authorize "cool-cans." H. Exhaust manifolds and muffler systems are free, except that they must be quiet and terminate behind the driver. Exhaust heat shields may be removed. I. One bolt-on torque suppression device may be used. A torque suppression 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. Holes may be drilled to mount a torque suppression device. This does not allow motor mount changes other than those which are update/backdates of factory components. J. The engine fan and fan shroud (unless it serves another purpose, e.g. as an alternator/generator mount) may be removed, modified or replaced. Electrically driven fans are allowed. K. On two-cycle engines, the ports must be of standard heights, size and configuration; crankcase volume and reed plates must not be altered. L. Any clutch, flywheel or torque converter that uses the standard attachment to the crankshaft may be used. Dowel pins may be added. Minor repositioning of the clutch slave cylinder is allowed to accommodate the alternate clutch, but the unit may not be relocated and the repositioning may serve no other purpose. M. Any mechanical shift linkage may be used. N. Limited slip differentials are permitted. This permits locked differentials, either by design, welding, or mechanical means. Differential cases, internal differential parts, and axle stubs may be machined as required for clearance and installation to the extent tha 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. O. Cylinders may be rebored to 0.0472 inches over standard bore and the appropriate standard oversize piston may be substituted. Cast or forged, non-stock pistons of the same dimensions and configuration as OE pistons may be used. Additionally the replacement pistons must be of the same weight or greater as the OE pistons. P. Rotating and reciprocating parts may be balanced but not lightened. Q. Intake and exhaust ports and manifold openings may be matched provided no change is made more than one inch from the port/manifold interface. R. Any transmission oil cooler may be used. S. 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 inch may be milled. T. Axle/halfshaft and driveshaft retention/location devices may be installed 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. U. Any accessory pulleys and belts of the same type (e.g. V-belt, serpentine) 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 bearings, are part of cam layshaft, or ignition drive or timing system. This does permit replacement of integral pulley-dampener assemblies. 1. Overview These specifications are meant to establish guidelines for a new class. Regions are encouraged to use Street Touring as a tool for attracting new members whose cars may not fit into existing Solo II categories such as Stock and Street Prepared. 2. Purpose To serve as a membership recruitment and retention tool by providing a natural competition outlet for auto enthusiasts using affordable sport sedans equipped with common suspension and appearance modifications which are fully legal and compatible for street use anywhere in the country. 3. Classes There are two classes within Street Touring: Street Touring Street Tire (STS) and Street Touring Race Tire (STR). 4. Vehicle Eligibility All sedans/coupes (four seats, four factory seat belts, not sports car based), maximum displacement 3.1 liters, normally aspirated (Yoda's note: This excludes such cars as turbo DSM's, Miata's and Honda CRX's. However, it does include a wide variety of cars, including all Beretta's and any GM FWD vehicle with a 3.1 or smaller engine. Potential competitors include Acura Integra, VW Golf/Jetta, Nissan Sentra/Altima, Chrysler's Neon, Ford Probe/Contour, Honda Civic/Accord/Prelude, Subaru Impreza/Legacy, Dodge Avenger/Stratus, Toyota Celica/Corolla/Camry, non-turbo DSM's). 5. Allowed Modifications (STS) Alternate components must be commercially available. All Solo II Rules Stock Category allowances, Street Prepared Category sections 1C, 1E, 3, 10V plus the following modifications are allowed: A. Any shocks, struts, and springs, using original attachment points. B. Any sway bars as per section Street Prepared Category section 7. C. Any wheels up to 7" in width that fit over stock brakes. D. Any tire up to and including a width of 225 (must comply with Stock Category section 3H) E. Strut bars/braces as per Street Prepared category 2C. F. Exhaust system downstream of the catalytic converter(s). G. Short throw shift kits. H. Spoilers, body kits, rear wings, etc. I. Pedal kits and other interior cosmetic accessories. J. Alternate brake pads and linings. K. Any fully padded and upholstered front seats with reclining seat backs. L. Removal of factory trim (rub strips, emblems). M. Alternate steering wheels of any diameter, subject to all limitations of Stock Category section 2E which do not address diameter. N. Cross-drilled or slotted brake rotors, original diameter. O. Alternate air cleaner enclosures. P. Headers, emissions legal (CARB certified, etc.). Q. Engine management computer or ECU may be altered provided that all modifications are performed within the original housing. Automobiles shall meet federal emissions standards. R. Preparation Limits: (1) No limited slip differentials, except for factory viscous coupler type units (Yoda's Note: this exludes Integra Type-R, most BMW's, etc, and any other cars with factory non-viscous differentials that would otherwise meet the requirements). (2) Stock brake calipers/drums. (3) Fenders may not be cut or flared. (4) Engine and transmission must remain unmodified, including emissions equipment, except as noted above. (5) True street tires must be used, with a minimum tread wear rating of 140. Additionally, tire models on the exclusion list below are not eligible. Tire models may be added to the list periodically through Tech Bulletins in the Fastrack section of SportsCar magazine. Please consult updated Rules for list of ineligible tires. 6. Allowed Modifications (STR) Same as STS, except delete R5 above regarding tires. The Tire rule for STR is the same as Stock Category. |
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