Start (Money left)
89-91 RX-7 Turbo II. ($12k)
Rebuild, street port ($10k)
Intake, exhaust, FCD, EMS, MSD, tuning ($7k)
T04 manifold and turbo ($5k)
Plenty of other supporting mods ($?)
You're looking at a ~$450hp car easy.
*cough*
... Oh, yeah, Integras are good cars too.
(Edit: I screwed up this post on a "qoute" mishap and had to try to rebuild it

h: )