Quoting B00000ST:
I am currently running a TO4B turbo, Wally 255HP fuel pump, FIC 550CC injectors, and 24psi. I just installed a adjustable FPR and was wondering what amount of pressure I should be running? Any suggestions?
A lot depends on how you are compensating for the 550's. If you have the ability to compensate for large injectors properly (DSMLink, chip, etc) I'd recommend going to an even higher base fuel pressure, to stretch those 550's a bit more. The Delphi 550's tend to run