Hey guys, just wondering if anyone knows the max pressure that a stock h22a1 fuel pump from a 94 lude can produce? I've been told 80 but then I keep thinking that I read 70 someplace. Anyway, my dilemna is if I should take out my inline and simply run my 5:1 jrsc fmu cuz it seems like I never go over 80 psi at my current 7-9 psi of boost. I want to take it out to try and get better fuel economy while not in boost cuz right now, it sucks ***!! haha, but yah, any thoughts into this? I'm really just wondering if my stock fuel pump can handle the 80 psi that I'm getting with my fmu.

 

I woudn't do it because although the stock pump can provide 80psi of fuel pressure the flow takes a big dive with pressure that high. So yeah the fuel presure can be that high but it won't do you to much good because the pump wont be providing enough volume....what kind of gas mileage are you getting?
I'm runing .65 bar (9psi) and still get on average 26mpg (city and highway)..

 

Leave it in, the stock pump can "handle" 80 psi, but won't flow nearly as good at 80 psi as an aftermarket. You have to take flow into account as well as pressure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">Leave it in, the stock pump can "handle" 80 psi, but won't flow nearly as good at 80 psi as an aftermarket. You have to take flow into account as well as pressure.</TD></TR></TABLE>

FYI:

This is called "Cavitation".

 

Thanks for the technological lingo.