ok so i need somone who can answer this question i got that would really help me out so hear i go im upgardeing my fuel pump 340plh and i decided to pick up a fuel pressure regulator while i was at it with some braided lines and here is wear this comes into play i 350 swaped my car and its a crate motor and i suspect it to be making over 300 no sure but low to mid 300's that why i bought the better fuel pump but lets say im running a 350 ecm from a truck and 350 esc all that good stuff but i dont have the correct injectors (tbi btw) i have 90 ft/lbs injectors and i figured i could use the fuel pressure regulator to turn down that 90/lbs to 65 lbs (this is one of my questions is if this is even possible another question is how will the 350 ecm (8746 ecm if im correct) respond to 90 lbs injectors will it just go with the flow cause i wanna keep the injectors and dont wanna go for some 55 pounders from a stock 350 and if i have to can those be amped up too 65lbs?? if you know the answer youd really be helping me out

 

What are you going to do with the enormous amount of fuel you'll be returning to the tank? It's not all going to fit through the OEM return plumbing.

You've got double the fuel pump you need. Assuming 1/2 pound of fuel per horsepower per hour, 350 horsepower will need no more than 175 pounds of fuel per hour at the pressure required by the injectors.

 

so go with stock 350 injectors? and save myselft from having to get a larger return line ? but can the 55lbs injectors be amped up??

 

Stock 350 injectors are 61 lb/hr, stock 305 injectors are about 50-55 lb/hr.

 

The injectors don't alter the return volume. That's related to pump supply volume. You have a much larger-volume pump than you're going to need, therefore much more fuel will be returned to the tank.