How much would 150hp at the wheels cost?
Turbocharging only.
I've looked at the Voodoo Turbo (and Turbo II, since it's only $350 more) kit, but I know nothing about it. How are they reliably? That is my biggest concern.
http://www.flyinmiata.com/turbos/turbosNA8.php
They are saying 165hp (180 with the II) at the wheels WITH one of their turbo exhausts. I probably don't have the money for an exhaust, so I'm guessing the turbo kit on a stock exhaust would yield about 150hp or so?
Also, what other turbo kits are out there? Also, what about piecing together a kit from parts (that I could possibly buy from members of this site)? ;)