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.
STREET CATERGORY
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″ circumference but any size tire that fits on the wheel is permitted. Only one sway bar may be changed or modified. Classes are listed as: SS, 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 STU, STR, STX, STS, STH, SST.
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: SSP, CSP, DSP, ESP, FSP.
STREET MODIFIED
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 SSM, SM, SSF.
PREPARED
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: XP, CP, DP, EP, FP.
MODIFIED
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.
XTREME STREET CATEGORY
he purpose of this Category is to attract automobile enthusiasts interested in autocross events with popular street vehicles using minimal
rules that allow for creative modifications with limited restrictions.
Classes are listed as: HCS, HCR.
KARTS
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.
LADIES CLASSES
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.