Originally Posted by 88GTStreetRod
1. What gears do you like to run in vert for autocross?
2. Do you see any need to upgrade to 4 wheel disc brakes?
3. My car currenly has Steeda springs, sub frames, strut tower brace,and the motor is stock.
4. I have considered a roll bar to stiffen the car up (even for regular street) and a tubular k member.
5. The car has new shocks and struts, but handles like a whale.
1. Leave the gears alone until you settle on a class. Because, well, stock is stock, E Street Prepared is maxed at 3.55, Street Modified and C Prepared are wide open.
2. No. But, a big yes for track work.
3. The sfc's and strut tower brace put you in SM, unless stock. You can run a non-stock 2-point only brace in ESP, IIRC.
4. Roll bar will do a great job of stiffening. BUT, read the rules - they differ with each class. And, some people think roll bars are not the hot ticket for street driving due to the proximity of your unhelmeted head to the very hard roll bar. BTW, a tubular K-member puts you in CP.
5. Well, yes. All in good time. Do some driving and some reading (search) and then re-visit this.
Edit to add - as to the original question: convertibles are fine, though not ideal, due to extra weight, chassis flex and the need a for a roll bar for any track stuff (not auto-cross). Don't sweat it. Get out there, have some fun and if you get really serious, worry about having the perfect car later.