I have a 2006 6.0 and I'm getting ready to put a vortech s/c on it. I have 42# Delphi that I haven't install yet, but I wanted to see if that would provide enough fuel?? Or would I need to do the changeover so I could use something like SVOs??
I will be looking for 7-8 lbs of boost

 

The 42# are good to ~550rwhp. I had the 42# Multec's in my truck but swapped over to the 60# Mototrons (which are actually 72# at our 58psi fuel pressure) when I put on the KB. Right now I am seeing low 60% duty cycles on them at wot on 6lbs. I would wager to guess that would be close to 100% on the old 42# injectors.

 

and you are a return system BigKID right?

Just be prepared to do some kind of upgrade to the fueling with returnless/42's and pushing +8psi. Plenty of guys don't but they are running 95+ IDC.