whats the factory fuel pressure for my stock 85 iroc-z
its got the 305 tpi
i bought an adjustable fuel pressure regulator and i dont know where to set it.
so whats the stock pressure and if there is a better setting for a stock setup what is that?
my regulator is adjustable from 0 to 120 psi.
thanks.

 

Stock fuel pressure is between 43/44 PSI and at idle it should be 36/38 PSI. I have mine set at 45PSI and check it with underhood gage. The gage is still reading 40PSI after I shut it down for the picture.

[IMG]local://upfiles/2696/F302E082EDC646FDA59F0616B6A04BA3.jpg[/IMG]

 

mine has a built-in guage...so 43 to 45 psi?

 

Set the fuel pressure regulator with the vaccunm line off and blocked.

 

engine running?

 

YES......

 

so after i set it when do i plug in the vac?