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Old 07-28-2010, 09:25 PM   #8
osu_ti
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Since this is a sticky thread, I'll start out with a list of SCCA classes the 318ti is elgible to run:

-G Stock (GS)
-Street Touring (ST)
-Street Touring Extreme (STX)
-F Street Prepared (FSP)
-Street Modified (SM)
-E Prepared (EP)
-X Prepared (XP)
-E Modified (EM)
-D Modified (DM)

To figure out which class you belong in, you just need to read the rules on the prep levels that can be found on SCCA's website.

The basic outline of the prep levels is:

Stock: Front sway bar and shocks are open, tires must be DOT approved. Wheels can be changed but must be stock size and offset.

Street Touring (ST or STX): Springs, swaybars (front and rear), shocks, and wheels can all be changed. Body kits are allowed and currently a rear wing can be used (that might change). Tires can be up to 225 mm wide for ST or 265mm for STX and rims can be a max of (7.5" for ST, 9" for STX) wide. Wheel diameter is open. Tires must have a treadwear rating of 140 or higher in addition to DOT approval. Fenders lips can be rolled flat, but the outer profile of the fender cannot be altered. Limited slip differentials are not allowed in ST, but are allowed in STX. Cold air intake is allowed and exhaust is open, but must use catalytic converters in the factory locations. Seats are open but must weight 25 lbs.

Street Prepared: Suspension is even more open, wheel and tire size is completely open, tires must only be DOT approved. Exhaust is open, intake manifold and fuel delivery is open, flywheel and clutch may be changed. Differential is open but gear ratio must be factory available. Seats are open.

Street Modified: Interior must be intact, but seats are open and back seats can be removed. Motor is open and swaps are allowed if from same make. F/I can be used. Same wheel/tire rules as SP. Body panels can be replaced with lightweight units.

Prepared: Gutted track car. Some restrictions on engine work. Some restrictions on weight and wheel/tire sizes. Tires need not be DOT approved.

Modified: Based on displacement and weight. (almost) Anything goes!

The above is by no means all inclusive and there are some exceptions from what is posted above, but it should give you a good idea of where your car should be classes. For the final authority on SCCA classing and rules, consult the official rule book at SCCA.
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Last edited by osu_ti; 07-28-2010 at 09:26 PM. Reason: Split post up
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