Southwest Montana SCCA

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Home How do I get involved?

How do I get involved?

To get involved, simply show up at an event. Members will usually be at an event by 8:00AM, and will lay out a course, check everyone in, sign disclaimers, and walk the course by 9:00. If it is your first event, we'd recommend showing up at 8:00AM.

For your first two events we offer a Rookie class to get you involved and racing without worrying about the hassle of determining what class your car belongs in.  After that, you have two options with our club.  If you don't want to worry about classing you can run in NC (Not Classed).  Or, if you want to take the time to figure out what class your car belongs in you can follow the guide below.


Classing your Car

In order to level the playing field a bit SCCA uses a system of classes to divide cars into groups with similar performance potential. These classes can be broken down into six broad categories, based on modifications. A basic description of these categories is provided below. Detailed classing information can be found in the 2014 SCCA Solo Rule Book. Unless otherwise stated, the rules build on each other. IE, if something is allowed in Street it is also allowed in Street Prepared.

Street: Minimal modification allowed. Wheels must be stock diameter plus or minus 1", stock width, and within 6mm of the stock offset. The front OR rear sway bar may be changed or modified (but not both), and the dampers (shock absorbers) may be changed. Any brake pads may be used, but the brakes themselves must remain stock. Full factory interior must be maintained.  "Cat-back" exhausts are allowed.  Tires must have a tread wear rating of 140 or greater.

Street Touring: These classes allow similar modifications as the Street Prepared category (basic performance bolt-on mods, plus suspension, brakes, wheels and tires), but restricts you to true street tires (140+ tread wear rating). This class also places some restrictions on wheel and tire widths, depending on car. Not all cars will fit into a Touring category class, but many do.

Street Prepared: Basic bolt-on performance upgrades are allowed such as intakes, exhausts, and boost controllers on turbo charged cars. Extensive suspension modifications are allowed, including lowering springs, coilovers, front and rear sway bars, etc. Brakes may be changed, and wheels of larger diameters and widths may be used.  Fenders may be modified for tire clearance. Internal engine modifications are not allowed, nor are changes to turbo or super charger systems (including supercharger pulleys). Full factory interior must be maintained. DOT approved R-Compound tires may be used.

Street Modified: Extensive modifications allowed to both suspension and engine. Cams, aftermarket turbos, and other internal engine modifications will all put you in to the street modified category. This class also allows engine swaps, so long as they come from the same manufacturer. For example, a Toyota may be swapped with any Toyota OR Lexus motor. Full factory interior must be maintained, with the exception that rear seats may be removed.  Body panels may be replaced with lightweight alternatives and aerodynamic aids such as wings may be used.  DOT approved tires must be used.

Prepared: The first of the "race car" categories. True race "slicks" (not DOT approved tires such as those mentioned above) or a gutted interior will land you in the Prepared category.

Modified: Generally, this category is for purpose built race cars that did not start life as a street car. However, it is possible to modify in excess of the rules of the Prepared class such that you end up in the Modified category. In general, significant changes to the chassis (such as replacing sections with tube frame) will result in this.

Within each of the broad categories there are sub classes, each with a letter designator (A-Stock, B-Stock, A-Street Prepared, B-Street Prepared, etc). Once you have determined the broad category that your vehicle fits into you must determine which class applies to your specific vehicle. These can be found in Appendix A of the 2014 SCCA Solo Rule Book, and if you you are having trouble someone in the forum would be glad to help.

Remember that this is only a brief overview of the modification rules. For more detail, reference the rule book. And remember, if the rules don't specifically say you CAN, that means you CAN'T.

If all this seems too complicated, SWMTSCCA also provides the option of not classing your car and just running for fun. In this case you will run in NC, or Not Classed.

Last Updated on Monday, 31 March 2014 10:50 by administrator

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