my setup will consist of a stock GSR engine with a GT35R. goal is 400 whp. will my TIAL 38mm wastegate be enough or will i have to upgrade to a 44mm??

the problem is i own a 38mm already lol and dont wanna get a 44 if i dont have to

 

redline
boost level
what manifold

can you answer those questions?

 

haha ok... didnt know i needed to know that

redline 8200
Boost level between 12-14 psi
Top mount tubular manifold

 

you'll be fine with a 38mm

 

Do you already have the 35r? If not, go with a 30r. The 35 is overkill, all you get is more turbo lag over the 30r and no add'l power.

 

i know a 30r is better for my goals... but i need room to grow as 400 whp is only my goal for now, i know ill want more once i drive it so instead of buying another turbo.... im just getting the 35r now

 

Room to grow IMO is fine when you are talking about a house with 1 bedroom/bath vs 3 bedroom/2 bath. Not competitive turbo setups IMO. The most common growth around the forums is people selling their setups for different parts.

http://forums.evans-tuning.com/viewt...hp?f=15&t=2931

If you haven't majorly upgraded your ignition or fuel system, don't have a bulletproof tranny that can survive dozens of powershifting passes, or a tranny with a very tight ratio - don't get the GT35. The GT30 from that dyno can overwhelm a single-pump fuel system, and usually 400+ is where you need a better ignition.

I'm sure as a former STI owner, you understand that boost is just a number. I'm actually surprised, since most Subaru people always try to maximize spool/response.

 

Well put. Dont bother with a 35r unless you're going for 600+whp and the add'l mods hiprofile talks about. With an intake manifold and good cams you can get 550whp out of a 30r

 

[QUOTE=HiProfile;40882855]Room to grow IMO is fine when you are talking about a house with 1 bedroom/bath vs 3 bedroom/2 bath. Not competitive turbo setups IMO. The most common growth around the forums is people selling their setups for different parts.
[QUOTE]

Lol...great analogy by the way. Its true, get a setup that fits your goals today and when the time comes to upgrade, then buy the parts you need. I've built 4 turbo setups on my car and only re-used a few items each time...

 

im glad i have a setup now that i like, where as all i would do now is change head units if i needed to without very much modifications.

That MV-S 38mm is nice as hell from Tial

 

plus the OP said his motor was stock. 400whp is pushing it on a completely stock motor as is. i'd get the gt30r too...this will probably be my next turbo

 

I would neve go smaller than a 44mm unless is a 2 wastegate system.