Welcom to autocross......... have fun
answers to your questions.
1. Smaller is better!!!! basically you want the smallest/lightest wheel with the widest tire you can put on it. the smaller diamiter and lower weight will help with acceleration,.
I run a set of Rota SLipstreams 11.8lbs with Falken Azenis sport tires 205/50R15 (Cheep and sticky!)
2. you do not need to be a member to race locally. If you want to be involved with the nationals then yes you have to be a member. other then that, most clubs have Loaner helmets. Curently if you really want to buy a helmet, the minimum rating of that helmet is M98. I suggest getting a M2000 or better (SA2000).
3. The best way to learn is stock. But if you've all ready modded stuff then STS (where I race) is also a good place to start. Really, you dont need any thing at all on your car.
Really. Basically at this point, with you never been autocrossing before, then NO mods will help you win, because YOU will be the only part making you slow. Its a hard pill to swallow but its true.
4. That really depends on you. right now all your cash should be spend on you and learning as much about handling and performance driving as you can. Go to a drivng school.
Evoluton Performance Driving school is an Excelent place to start
once you find that the car is slowing you down, then its time to chang parts.
5. If you want show and race, then its going to get expensive. you want the car to be as light as possible (Amps and subwoofers should be light or easily removable.) Body kits probably will not help or hinder you much, unless its heavier then stock. (remeber low weight is your friend)
other wise, race the car how it is now. get use to it, how it pushes in the slow corners and is loose in the fast sweepers. also, TALK to all the OLD DRIVERS!!!!!! ask if you can walk the course with them, ask them about the track, see if you can ride with them, and when you do, watch the driver not the ride!!! you first year is nothing but learning, dont expect to win, but dont let that discurage you.
Keep racing and Keep the shiny side up!!
