i dont think it can be done with only 10-12psi. would need at least 15. i was pretty close with 14 and a front mount intercooler before my turbo took a crap. im about $1200 into it.
I believe I said a "nominal" 300 hp. That was a very poor choice of words.
What I should have said, was "approximately" 300 hp, because it likely won't make 300 as I described it... but, maybe 270... You can have a lot of fun with 270 hp in a light (2,700-pound) a body... That's like 420 hp in a new Challenger...