Quote Originally Posted by lookingforboost View Post
just keep it to a nice and safe 5-6 psi and you can use the stock injectors and get the supporting mods around it setup right and it will be a great power improvment over the stock
I am pretty sure luke was using stock injectors and was running his D at 11psi but i would just get a bigger fuel pump to be on the safe side.
I would use that bit of saved money to get a good quality high flow exhaust setup and no muck around with cats from other cars etc dont get the exhaust right and even if it has injectors etc it wont make as much power as having a good exhaust on it
Other way round lol

I used the stock 240cc for a while but they started to fade round the 115/120kw mark.

I was running RC 440cc when at 11/12psi

Its the pump you can save on as the stock pump can handle 300hp there abouts... (Stock D16Y1) not sure if the Y4 rocks the same....

And yeah as Ryan says, a good 2.5" high flow exhaust is a must!!!

In fact that should be the first thing on your list IMO