fuel pump help, is it enough.
Thread Starter
TECH Apprentice
Joined: May 2005
Posts: 300
Likes: 0
From: Boise Idaho
fuel pump help, is it enough. We are running a 408, twin turbo on 9 lbs of boost, fuel pressure is at 63 psi, and 96 lb per hour injectors, under full boost, the fuel pressure drops only 3 psi to 60 psi and stays there, we haven't done anything to the pump, no changing it out, but the last owner could have since it was being built for a turbo car when it came to us. We started out with no boost, and the pump didn't even blink, so we went to 3 psi and tuned it for that, still no problem, so we went to 9 psi and can still run 11:1 afr at a hole 25 % injector duty cycle, somewhere around five and a quarter horse.
We are just trying to figure out if a 255 lph would be enough to keep up with this or if we should expect a larger pump if we rip into the tank. of course that is not needed for a while, who knows, mabey 15 psi? lol,
Only proplem is the 315's that we have on the rear just don't hold up, at all, instant wheel spin.
We are just trying to figure out if a 255 lph would be enough to keep up with this or if we should expect a larger pump if we rip into the tank. of course that is not needed for a while, who knows, mabey 15 psi? lol,
Only proplem is the 315's that we have on the rear just don't hold up, at all, instant wheel spin.
