with a chip and intake you should notice some pretty significant gains.. i have a chip and intake on mine and it made a pretty big difference. ive never run against a prelude, but i think u might be able to take it
talk to MarkD on this board, he is in Toronto and he makes chips for e30s (I got mine from him as well as a few others on this board so we can vouch for it) and not too expensive
Old car 1990 325ix. Current car 2000 540i.