Add rollbar. Take car as is (aftergiving it a good going over, refreshing all fluids, brake pads, etc) to a track day. Have fun.
Then, add power (SC) after:
1.) Brakes (track pads, track fluid, minimum)
2.) Upgrade suspension (shocks/springs min, coilovers better, frt swaybar, endlinks).
3.) Track car a few more times.
4.) Add proper seat and harness.
5.) Add power. Have fun.
Seems lots of guys do the sequence backwards. Power first, with crappy suspension, tires, and worse, crappy brakes. Not fun. Not safe. Don't be that guy at the track.
Yeah, it's expensive, but you can do it in stages, find good deals on used stuff, and still track the car while building it and getting good seat time. When you can wring out fast clean sessions with 100hp, then 200hp is easier.
I'm sure I'm forgetting some stuff, but you get the idea. Have fun and enjoy the sickness of miata.
Edit: Just re-read one of your responses where you are going to drive it stock for awhile and got the deal on the used autoroter. Sounds like you are already going in the right direction. Try and get a HardDog Hardcore bar. Passes all trackday techs in my neck of the woods. The hardtop version puts it a little more reward, to clear the side latches. Start looking for a deal on a hardtop now..it takes awhile.
Last edited by SixAce; 08-05-2011 at 01:56 PM.