Road race / AutoX classes to suit build?

[MX339]

What JB said. Pretty much the only place an E30 is competitive in a non spec series is in BMW CCA K-Prepared and NASA GTS-1 or 2, and you can't run big HP numbers there. Once you get into the higher HP classes you're simply outmatched by more aero and geometry efficient cars.

[Jb325is]

Stick to autocross, what your talking about would not be suitable or competitive in any wheel to wheel racing class. You would fit in SM and have some fun, don't plan on winning anything though.

[agent]

Truth. An E30 in SM is a lot of fun, but it's not going to be competitive once you get PAX'd.

[Lof8]

...and SM is a hard class to compete in. There are some monster cars in there!

[agent]

For SCCA/AutoX you'll be in SM for an engine swap regardless of what else you do. The only caveat to that is if you run R comps, in which case you'll advance to a tire class.

[whitebulat22]

Right now I'm playing with my stock eta engine on narrow tires to get to know the car, but long term I want it to be really fast. Like 300-350 WHP ish fast. My favorite options for doing so are S54, S62, S38 swap or built boost on my M20. I wouldn't apply forced induction to any of the "S" supermotors because I would rather save the money than lose complete control of the car. Those would get the simplest bolt-ons only and maybe larger valves / ports on the V8.

Which race class(es) fit the BMW powered 11-12 sec quarter mile E30 range the best? Suspension is centered around IE Stage 3 springs + Koni SAs and I will try to run a square 245/45/16 tire setup or 225s up front if I don't have the heart to hack the fenders. Those unless someone suddenly decides there should be more 255-265/35/17s or 245-255/40/16s, or some sort of wide 15 that isn't more than an inch off in diameter. I would prefer to stay in something with street tires for financial reasons but might be down to run the 275/35/17 Hoosiers on it one day.

Thanks r3v