94 5.0 Cobra Fuel Pressure Recommendations

[rustinh1]

I have been searching here at work for about an hour (tough job) and I can't seem to find an answer... I am hoping this will be easy for someone to tell me.

I have the 94 cobra in the sig: intake, tb, shorties, h-pipe, dumped flowmasters, pulleys, etc.

I was wondering what I should set my fuel pressure at. I found a few things on other sites concerning 5.0 GT's, and a few things on this site concerning 4.6 cars, but nothing in particular about 5.0 Cobras with the stocker 24 lb injectors. I have a kirban adj. regulator and a guage mounted on the schrader valve.

Should I set the pressure with the hose on or off, and what pressure should I set it to? I had it at about 32 with the hose on at idle, and then I cranked it to 40 with the hose on at idle and it seemed to pull considerably better...

Thanks guys!
-Blake

 

[rustinh1]

Anyone? I am just going on seat of the pants (which ain't too accurate sometimes) until someone chimes in with some advice.

 

[RippinSVT]

You need to remove the vacuum hose to get an accurate reading of your static fuel-pressure, then adjust accordingly (to 39-40psi without vacuum), and put the vacuum line back on.

 

[rustinh1]

Great, thanks.
I figured I would need to adjust with the hose off, to compensate for vacuum readings being different between cars, I had to do the same on the old turbo Talon.
Thanks again.
-Blake