ArcticZ28

iTrader: (14)

I just got my 408 so I am upgrading to Ford 42lb injectors and a new in-tank fuel pump 255lph. Do I need a fuel pressure regulator or anything else? I think just the pump should be fine since I'm not upgrading my rails, but I just want to make sure I'm not missing anything.

slowpoke96z28

iTrader: (2)

if its naturally aspirated, i'd say you were good. forced induction i think would rate a return style fuel system. i don't have as much experience as some of these other guys with this setup, but considering 4-cycle engine theory, I would want a return style because the damper on a stock style rail can only hold so much fuel before it would experience a lean condition due to a sudden change in fuel required (ie, nitrous system's fuel solenoid opening, increased boost pressure, etc.). JMO though.

ArcticZ28

iTrader: (14)

Hm, that's what I figured. Maybe someone else with first hand experience can chime in. I know a hell of a lot of people are goin with 408's lately and obviously have to upgrade the pump.