Ls1 Fuel pressure Problem.
Thread Starter
Teching In
Joined: Jun 2005
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Ls1 Fuel pressure Problem. 
I am putting an Ls1 in a 300zx. I have set the car up to run on two stock 300zx fuel pumps, (the 300zx motor needed 40# of fuel pressure). The ls1 from what I have read needs to operate at 57 psi of fuel pressure with the stock injectors. The problem I have is that my stock 300zx fuel pumps don’t like that high fuel pressure and screaming at me for it. My question then is, if I go to a bigger injector how do I know what to set my fuel regulator at? Is there a formula for this? My goal would be to get a bigger injector and be able to run a lower fuel pressure. Am I asking for to much? 
