fuel system for 400-450hp
 

I plan on tuning my car for a conservative 400-450hp once the blower is hooked up. Will the stock fuel lines and fuel rails support this amount of horsepower, considering the fuel will be fighting about 10lbs of pressure inside the intake manifold? I currently have a 255 pump and an adjustable fuel pressure regulator that is boost sensitive. The car is a road course car, so reliability and consistency are crucial. I will NOT be using an FMU. I plan on using 42lb injectors as well.

Re: fuel system for 400-450hp
 

I`m detunned to 480 rwhp until my lines and rails are changed out by my speed shop. I would think you would be fine , im not sure what there rated for though.

Re: fuel system for 400-450hp
 

What about injectors? I currently have 30lb injectors with a 255 pump. Will I be able to push enough fuel pressure in order to keep the motor in a good air/fuel range?

Re: fuel system for 400-450hp
 

I would stick with using the 42`s and no fmu myself.

Re: fuel system for 400-450hp
 

You'll be fine with the stock lines and rails. I agree with 42's and the 255lph pump.

Re: fuel system for 400-450hp
 

I run 500rwhp with a 255 and 42# and no FMU (just custom chip).

Re: fuel system for 400-450hp
 

508rwhp on stock rails and 38# inj. with a 255lph in tank and a T-rex inline. No problems.

Re: fuel system for 400-450hp
 

My fear is that with 42lb injectors, and only putting down about 425 to the wheels, that I will have to turn the fuel pressure down too much. I was personally certain of my stock fuel rails and lines, but just wanted some outside confirmation.

Re: fuel system for 400-450hp
 

how do u turn down your fuel pressure ?

Re: fuel system for 400-450hp
 

With an adjustable fuel pressure regulator.