Diy fuel system questions.

[littleredstroker]

Awesome . So one relay for both ?

sent while staring at a windowed block

 

[Marty]

1/4" off bottom and cut at an angle.

 

[littleredstroker]

so another dumb question here. with the dual stock pumps, you have a check valve after each pump... if you have one pump putting out say 61 psi, and the other putting 60, how does this increase volume? wouldnt the stronger pump also flow back and close the check valve to the weaker pump?

 

[ken6881]

the psi will be the same after the pumps because they are connected . If one pump was stronger it would just flow slightly more than the other. It would not force the other pump backwards unless it failed completely to where it was not capable of putting out 60 psi of pressure. a check valve would solve this problem of a failed pump. could be done with a ball valve but would not be automatic like a check valve

 

[Arisley]

Right now, I have one dead pump, (got the replacement on the bench, gotta make the time to put it in), no check valves, no ball valves. Normal driving it holds 60 PSI just fine. Stick my foot in it and the pressure drops in a hurry. That's just one pump not handling the demand from the injectors.

 

[m j]

so another dumb question here. with the dual stock pumps, you have a check valve after each pump... if you have one pump putting out say 61 psi, and the other putting 60, how does this increase volume? wouldnt the stronger pump also flow back and close the check valve to the weaker pump?

pumps do not put out pressure. pressure is a measure of restriction.
pumps flow volume. the regulator controls the restriction.