VEHICLE CLASSIFICATION GUIDE
DRIVERS ARE RESPONSIBILE FOR VEHICLE CLASSIFICATION
Any obvious mis-classification can be corrected at the discretion of a member of the Competition Committee or the Event Chairman. The Autocross Club of Central Oregon follows the car classification rules as outlined in the current SCCA Solo Rulebook and subsequent updates. The following are highlights of allowances for a particular category. If the rulebook doesn't say you can do a particular modification, you can't do it.
Cars having little if any modifications. Aftermarket fluids, filters, other maintenance items are permitted. Tires must be DOT legal, including R-tires. Shocks can be changed but must retain the OEM geometry and dimensions. Wheels must be the same size as stock +/- 1" circumfrence but any size tire that fits on the wheel is permitted. Only one sway bar may be changed or modified.
Classes are listed as: AS, BS, CS, DS, ES, FS, GS, HS.
STREET TOURING CATEGORY
Sport compact cars with four seats, common suspension, engine, and appearance modifications competing on true street tires with a minimum tread wear rating of 140. Modifications relate to basic bolt on that still meet the car's emissions standards. Suspension allowances are similar to Street Prepared. STS has a maximum engine displacement of 3.1 liters and some small displacement turbo cars. STX has a maximum engine displacement of 5.0 liters or 2.0 liter turbo or supercharged.
Classes are listed as STS, STX, STR, STU, STP, STH, SSR.
STREET PREPARED CATEGORY
Allowances in excess of Stock and Street Touring. Full interiors but race seats are permitted. Engine intake and exhaust are free but no modifications to turbo or supercharger systems. Emissions control systems may be removed. Coil-over suspensions with adjustable perches and camber plates, etc. permitted.
Classes are listed as: ASP, BSP, CSP, DSP, ESP, FSP & SSP.
OVER STREET PREPARED CATEGORY UNDER- UNDER 2.5L
A vehicle must be street legal and run on street (DOT approved) tires. The vehicle must be capable of being licensed by having the required following equipment; Safety Belts, 2-headlights, 2-taillights, 2-rear reflectors, Registration plate light, 2-brake lights, Turn signal, 2-Brake systems (Brake & E-Brake), Exhaust System, Wipers, Rear view mirror, Horn, Fenders, & min clearance (nothing lower than the rims).
Listed as OSPU.
OVER STREET PREPARED OVER- 2.5L AND OVER
Same as above except for engine displacement.
Listed as OSPO.
Cars equipped with drive train and suspension modifications that are beyond those allowed in the Street Prepared Category. Unrestricted brake and suspension components but with original pickup points. Engine swaps within the same model line and turbo or supercharger may be added. Non-Stock hoods and fenders are permitted.
Classes are listed as SM, SMF, SSM.
Prepared cars are defined as those having extensive mechanical and weight saving modifications and racing slicks. The basic body and engine configuration on Prepared cars remains as delivered from the factory.
Classes are listed as: AP, BP, CP, DP, EP, FP.
Modified cars are defined as those having very extensive mechanical and weight saving modifications and racing slicks. The modified classes contain specials, formula cars, and engine swaps.
Classes are listed as: AM, BM, CM, DM, EM, FM.
CLASSIC AMERICAN MUSCLE
The purpose of CAM is to attract automobile enthusiasts who are currently interested and/or participating in autocross events for muscle cars and vintage vehicles manufactured in North America by GM, Ford, Chrysler and AMC. Vehicle must be either a domestic automobile or truck (pick-up or SUV) of front-engine/rear-wheel-drive (FE/RWD) configuration.
Classes are listed as: CAM-C,CAM-T,CAM-S.
The purpose of Heritage Classic is to enable enthusiasts of sports cars, coupes, and sedans from the early years of the SCCA to participate at events with cars of similar technology. Vehicle must be from model year 1974 or older and not produced by a United States based manufacturer. Models newer than 1974, but of the same generation as the 1974 model, are allowed.
Classes are listed as: HCS, HCR.
This category is an outlet for members interested in running karts at Autocross events. Category Values Preparation allowances in line with national karting organizations, to allow easy migration between Solo and other karting events.
Women are free to compete in the Open class in which their car is legal. However, ladies' classes will be established in the following manner: Multiple Classes - A complete set of parallel classes using the same preparation and scoring system as in the Open classes.
Classes are listed as ASL, STSL, ASPL, OSPUL, SML, APL, AML, etc.