Join Date: Dec 2008
Thanked 112 Times in 85 Posts
Every truck is different. I played around with mine at the drag strip one day to figure out what works best. My truck runs best at around 70 psi of fuel pressure, meaning at that pressure my idle is at its smoothest, and I also get the best ET's and MPH at the end of a run. Bumping the pressure up over 75 psi gave me a loss of power and also changed the idle. Also going below 63 psi does the same thing. My fuel pressure gauge shows that on a WOT run, my fuel pressure will drop about 3 psi. I'm still running the stock fuel pump, and a 3 psi drop is nothing.