[urq] More Weird UrQ Behavior - fuel starvation

[Ingo Rautenberg]

Could the solution be to (gasp) install a lower pressure pump instead, due
to the considerably lower EFI fuel pressure requirements, which should lead
(theoretically) to less cavitation as well?

Ingo

On Mar 28, 2010 12:18 PM, "Cody Forbes" <cody at 5000tq.com> wrote:

When it comes to fuel pump output flow is inversely proportional to
pressure. When you decrease the pressure that the pump has to work
againt you increase the volume of fuel that the pump moves. Since the
engine is using basically the same amount of fuel you end up with more
volume being returned to the tank.

This is why the fuel pump that is stock on a 5000tq, designed to work
at almost 100psi, is the fuel pump of choice for racers and high
performance street cars everywhere. When used in EFI systems the flow
rate of this Bosch 040 (or 044 in out of tank version) pump is one of
the highest flow pumps on the market.

http://www.boschfuelpumps.com/ for specs.

-Cody (mobile)

On Mar 28, 2010, at 11:16 AM, Grant Lenahan <glenahan at vfemail.net>
wrote:


> OPK, so it sounds like ( for mysterious reasons) that the EFI
> systems have a higher proportio...

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