After all the problems the last issue is the fuel pressure regulator

[68converted]

I checked the threads as much as possible, but could not find the answer. Do I really need to use an adjustable FPR? I did the cam, heads (afr 165), intake (ported explorer) swap with 24# injectors, 70mm TB and 73 mass air.

I am using a walpro 155 pump, which was used on some of the pickups and econoline vans. I have no idea what the PSI output of the pump is...

The reason I ask is that the FPR is leaking from the base ever so slightly, and I just want to button everything up.

If the factory FPR is set at 38 psi, and everything I see in the threads looks like 38 is the magical number; then what is the point, and is it worth the expense.

I will take eveyones advise here as you have not steered me wrong yet. Just wanted to put the question out there for clarification.

Thanks as always,
David

 

[fford]

I don't think it is mandatory, however I had my car dyno tuned and he appreciated the adjustable one and did adjust it on the dyno. With the pump change and injector change you may need it to compensate for those changes.

 

[68converted]

Do you have any idea what the final setting was; psi?

 

[fford]

no, he didn't really say. I was watching the a/f ratio on the screen through the rpm band. I should be going back in a week or so and I can ask then.