"What class does my car belong in?"
If you're here looking for the answer to that question, you're in the right place. Car classes are updated annually and are maintained by the SCCA. Refer to the current year edition of the SCCA National Solo Rule Book. Once you determine your stock class, you'll want to check local autocrosser Ben Clement's Modification Guide to see how any modifications you've made to your car, if any,will affect your class.
Local Arizona Region Competition Categories
All of the SCCA preparation categories and classes are available in Arizona Region SCCA autocrosses as the "OPEN" competition category where entrants compete for best raw time. There are also several additional competition categories offered at Arizona Region SCCA autocrosses, which are handicapped using the PAX factor method. These competition categories are:
Novice 1 - Street (Stock) classed cars. (Allows RGP)
Novice 2 - Street Prepared, Street Modified, Prepared, and Modified classed cars (note: R-comp tires are not allowed in Novice, all cars in Novice 2 must drive on a tire rated at 200 UTQG or greater. (Allows RGP)
Novice 3 - Street Touring classed cars. (Allows RGP) Novice Ladies - All classed cars with any lady driver. (Allows RGP)
PAX 1 - Street (Stock) classed cars (Allows RGP)
PAX 2 - Street Prepared, Street Modified, Prepared, and Modified classed cars using street tires (tires of a 200 UTQG or greater rating). (Allows RGP)
PAX 3 - Street Touring and CAM classed cars. (Allows RGP)
PAX 1 Ladies - All national SCCA classed cars driven by ladies. (Allows RGP)
PAX 2 Ladies - Street Prepared, Street Modified, Prepared, & Modified classed cars using street tires (tires of a 200 UTQG or greater rating). (Allows RGP)
Sportsman - All national SCCA classes are allowed in this category. (Allows RGP)
Open - All national level classes each have their own Open category and will ONLY compete against other cars in their class. In addition all Open categories do not have RGP and must compete in the same run group together.
TNT - This is a non-competition class. Drivers who enter in this class will not be included in the overall results and will not receive a PAX score, instead they will receive only their raw time.
SCCA National Solo Preparation Categories
There are several levels of car preparation starting with "stock" and going to "modified". The SCCA defines what modifications are allowed in each preparation category. Within a category of preparation there are several "classes" of cars, which are group by similar potential within that level of preparation. The preparation categories are:
Street Tires: any DOT rated tire with a wear index of 200 or greater.
Novice: Anyone who has entered less than 6 events in the prior 12 months AND has not received a trophy in any class.