Chris Ng

Just curious.. The stock FC/FD fuelpumps have little checkvalves at the outlets to prevent fuel from leaking back through the fuelpump once the pump is shut off..

according to my fuel pressure gauge, my fuel system holds no pressure at all once the fuel pump is shut off.. It drops right to 0 ...

Can some of you with walboro fuel pumps installed confirm wether your system holds fuel pressure or not after the car is turned off?

My current setup includes a walboro fuel pump, malpassi FPR, stock fuel rails, no PD...

Thanks,
Chris

RoadRaceJosh

Hey, look on the bright side, you won't flood the engine after shutdown!

RETed

That is correct.
The Walbros don't have internal check valves.


-Ted

Chris Ng

Thanks Teddo ... I guess I should have checked before it was installed.. too lazy to go pull it out again

Jeff20B

iTrader: (13)

That's nice to know. Thanks.

ronbros3

most race pumps dont hold residiual pressure after shut down. on restart you have to watch your fuel pressure come back up before cranking, sometimes annoying. RON

Maxthe7man

Not True, Walbros do have check valves on the outlet..... Mine holds pressure for days after shut down with twin walbros.Its kinda like a schraeder style valve just like comp tester..Not only that, if you twinned them like I have with them staged, and used no external checkvalves it would never build pressure while the second pump was off..max
Ps: Toss the Malpassi...