im thinking of going single turbo cuz my stock twin is having secondary boost issue. im wondering what is needed from what i already have on my car.

currently have:
Power fc
hks twin power
blitz front intercooler
1300cc secondary inj.
greddy intake
Nippondenso Fuel Pump
Fluidyne Radiator
Greddy Profec B Spec 2
downpipe / midpipe / greddy sp exhaust

im thinking of getting either the gt35r or gt40r any recommendation? is streetporting needed? 850cc / 1600c or will 550c/1300c do? my hp range is within 350-400hp. plz help with my build . thx

 

First off, do a search. There are so many threads on this topic asking the same questions. gt35r would be fine for those power goals. Clutch? You don't "need" porting. You probably want dual oil coolers. And obviously your DP and intake are useless. You should be OK with 550 primary injectors, the secondary might top out.

Most people are going to recommend AI. I'd say get water injection even if you stat on twins.

The cheapest alternative is to fix the boost issue.

 

you're already set up pretty good. you could run 850's in the primary and keep the 1300's. Those would be good for 400ish. You don't need to port.

I suggest the A-spec GT35R kit or the GT3574 kit. They are priced very well and have everything you need to bolt it up.

You will also need a wideband AFR and other supporting gauges.


do some searching it's all covered. but for the most part you're farther ahead than many who undertake this project.