Hello Everyone,just joined and this is my first post.I just purchased a 10 sec r32 gtr and didnt get to drive it first as the engine was still getting built but i did see the car run the numbers previously.Now the engine has venolia forged pistons and a 1.5mm cometic or kometic metal head gasket.Not sure how to spell it.The car has a greedy T78/33D turbo on it,and since running it in and dynoing it i must say im a bit dissapointed.See the sucker doesnt spool up until 5000rpm,kicks you back at around 6000 and buy the time your boogying its on the limiter,so you peg the next gear drop down to say 4000rpm and then you start the climb again.Now on 19psi it made 337kw at the wheels and we are yet to hit 26psi which should be well over 400kw,but thats later.The point of this post is that i need advice on the turbo.I dont want to completly rip it off and put a smaller one on but rather keep the front housing and put on a smaller rear exhaust housing.But after speaking to a few friends they tell me the next size down for a greddy turbo housing is nearly half the size and will be to small.I have heard you have to use a garrett housing and modify it to suit.Guys any advice would be appreciated.The reason i mentioned the pistons and head gasket is that this has lowered the comp to around 8.2 to 1 and isnt helping either.By the time i hit boost the wrexy or whatever is gone.I need something that comes on at around 4000rpm.
hope to read your replies soon.thanks guys.
