Looking for fuel pressure table @ various rpm

[roswell998]

I've tried searches but haven't hit yet. So........

What should the fuel pressure be at the rail test valve when:

1. Primed several times (I found 42 psi for that posted)
2. When engine running at idle?
3. When engine running at 2500 rpm in neutral?
4. When engine running at 4000 rpm in neutral?

If anyone can answer or provide a link to previous thread with the above info it will be appreciated.

 

[bryantaylor]

fuel pressure is not RPM based, it vac based. static is 43.5, that is with 0 vac. at idle with full vac, it should 35ish psi

 

['94SHO]

I get 32 at idle, 40 at WOT, with a new fuel press. regulator..

 

[Ishodu]

Actually it should be 39psi relative. It is vacuum regulated. You must compare the vacuum to the fuel pressure. If you have 16 inches vac you Davide that by 2 and you get 8. Take this number from 39 and its what your fuel pressure should be. The only time it should be above 39psi is under boost. And thats pound for pound.