[urq] More Weird UrQ Behavior - fuel starvation

[Ben Swann]

Considered this too and for various reasons involved with impementation - NO!
 
I'm sure to get hounded with many more potential solutions contemplated and even tried.
 
Much of these solutions seem obvious until one actually tries them on this car.
 
I challenge anyone to find a better solution for under $100 in parts.
 
Ben

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From: Ingo Rautenberg [mailto:ingo.rautenberg at gmail.com] 
Sent: Sunday, March 28, 2010 12:33 PM
To: Cody Forbes
Cc: urq at audifans.com; Ben Swann; Quattro List; Grant Lenahan; afinn1 at gmail.com
Subject: Re: [urq] More Weird UrQ Behavior - fuel starvation



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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