Thread: LPFP Tech info
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      01-21-2013, 09:46 AM   #163

Drives: E92 335i
Join Date: Sep 2012
Location: USA

Posts: 443
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Originally Posted by PUIVIA
I am confused as to how we are going to make more flow work for us? I mean this LPFP feeds a mechanically driven HPFP right? Isn't being sure we maintain pressure more important? There is no return system. So say you are running your parallel pumps and you flow 50% more fuel where does th excess go?
There is a fuel pressure regulator in the driver side of the fuel tank. It bleeds excess pressure back into the tank and maintains 72psi of line pressure.