Quote Originally Posted by SlowFiero View Post
What turbo? Should be able to easily make 400 with what you have assuming you can supply enough fuel and have enough turbo. Upping boost may cause issues with your valve springs. Assuming your turbo is up to the task, injectors are probably needed to keep duty cycle under 80%, though I ran 42.5 green tops static for years with my m90 build around 375 rwhp. If it starts floating valves then springs.
Honestly I don't know the specs on it, it was supposed to be comparable to the turbo that originally came on the Z7 turbo kits back when they first came out.

I believe ZZP said my injectors were pretty much maxed when they dyno tuned it. Wanna say 100%+ duty cycle. Something about being an 04+ return less and having more headroom though so they weren't worried since I was just pushing 9psi.