Im about to start tearing apart my RX-7. Just ordered a body kit (RE Amemiya 2002 GT Widebody), Stereo System (consisting of Mb Quart QSD's, Zapco C2k Amps, Single 13 JLw7 Sub), **** load of fiberglass and Carbon Fiber, and paint/painting supplies (Just gotta build a homemade spray booth). That takes care of the most time consuming stuff.

As far as the engine goes Im going to try to get the big stuff done before I paint the car. So im looking for a turbo upgrade. When im done with the car I want between 400-450 WHP. I will be doing a FMIC, Fuel system (new fuel rails, fuel pump, 1600cc Secondary's with 850 Primary's, FPR). Apex power FC, Ignition system (starting to research that), Radiator, as well as the exhaust system. The engine has been rebuilt and street ported, the previous owner had it done so im not to sure on all the details.

I want to get 400-450WHP @ around 15psi
Looking at the Greddy T78, HKS T04R, and also a kit by Rotary Extreme (T04R Turbo Kit, Which seems to be the same as the HKS kit, only cheaper and I'm not sure if they include all the necessary hardware since they haven't responded to my e-mail yet).

So any opinions or suggestions on what would be the best system for what im trying to accomplish. I know stereo and autobody, but still learning when it comes to Rotory and Turbos.

 

Go with any of those. I would go for the BB T04R myself. It should get close to what you want and if you want to run race gas and tune you can run alot more boost efficiently.