P7100 fuel supply question?

[billfahl]

My question is do I have to see 50 psi of inlet fuel pressure @ 200gph, if I can supply the same 200gph at 25 psi? What does pressure affect, timing?

I don't know, I would like an educated opinion?

Thanks

 

[Fireman450]

P pumps need a steady 40+ psi . Any lower and ya run the risk of damaging internals of the pump.

 

[deerefanatic]

Yep, and the 160 and 175 pumps loose power big time below 40.... The cam is a poor design that doesn't allow the barrels to fill properly.