Lift pump pressure and voltage

[DuramxMan]

I have the Fass Titinium pump and run a fass fuel pressure regulator on the return side and have it set at 12psi.

 

[coker6365]

The standalone FASS pumps have an adjustable regulator. The FASS Titanium series pump systems with the filters don't. I'll start with the stretching the spring and replacing the check ball. I also have a voltage amplifier that is boost/signal referenced that I am going to install to ramp up voltage to the pump as boost/rpm comes in. I want to see how far I can push my single CP3. Once it's dialed in I'll post up some results.

What size pump? I doubt you have a voltage issue as typically it is the relief spring that causes the grief. You should have part # PS-1008 rated for 8-10psi. You can try stretching the spring first since the next spring up for use with that return fitting is PS-1015 rated for 45-50 psi. There is a dodge setup that uses MRT-1002 return fitting an spring PS-1001 rated for 16-18psi as well.

 

[jpowel29]

I got a new spring and ball from FASS. I stretched the spring about 1/4" and didn't see any change in pressure (on the gauge). I am going to check fuel pressure up front with a mechanical gauge to compare the two. The ISSPRO 30psi electric gauge is new. Just curious to see how close the 0-100psi sending unit calibrates with a mechanical gauge. If those check out the same I'll swap springs.

 

[ZeroGravity58]

I just finished installing my isspro fuel pressure guage. Right now my airdog is sitting at 13 psi at idle and drops to about 8 on a WOT run. That's still pulling thru a stock pickup. That on tune 4 with a single 10mm pump.