Ya man, you might be able to push more than 8-9 psi depending on the turbo but over somewhere just over 200hp you will start to break stuff
(Not speaking from experience, just from what I've heard, I'm trying to do a turbo-D series also)
Also I got my injectors (and turbo) literally for free from a talon motor that this guy had sitting in his garage... you might not have to pay full price for things