I have a freshly rebuilt S4 13BT w/ Series 6 Rotors and Agressive Street Port. I'm running a T04Z 1.00A/R, 500cc Primaries/1600cc Secondaries, Dual Walbro 255 Fuel Pumps, and the Aeromotive A1000 Injected Fuel Regulator. I've been searching to find the correct base fuel pressure I should be running with this setup and I am finding around 38-43psi. Does this sound about right? Also should I be running the vacuum line on the FPR to allow the fuel pressure to increase with vaccum instead of being a straight rate setup?

 

43.5 base [static = 0psi] is common

yes you need to increase pressure with boost.

 

Excellent. Thanks for a quick response. Do you feel that the injectors and dual fuel pump will be enough for 1 - 1.5 Bar?

 

Shouldn't be a problem....you'll mostly be limited by octane.

 

1 bar maybe, 1.5 no way on pump gas. You need way more fuel for that much boost. Or H20 or higher alot higher octane.

 

Correct. I was just asking about being able to pump enough fuel, not actually on the octane.

 

Second question...

I powered on the system tonight and the fuel pumps prime up and the fuel pressure gauge jumps up to 45 psi. Once the fuel pumps stop priming the fuel pressure drops back to 0. I have inspected all of the fuel lines and connectionsfrom the fuel tank, to the fuel rails, and back to the fuel tank with no leaks. Is this normal for a rx7 fuel system or I'm open to all ideas to this issue?

 

no, that is not normal.

It will drop to 0psi, but takes a few minutes.

 

Is it common for oem injectors to fail (leaking internally)?