Mounting Orientation of Bosch Fuel Pump

[Atkinson, David]

Greetings.  I'm pretty sure you're ok as long as the inlet of the pump is   
lower than the outlet.  I kinda remember this in the documentation for my   
stock GM-type TPI pump.  The pump will work best when placed close the   
the tank, and below the fuel level.  These pumps like to push fuel, not   
suck it.  Also, if it's placed below the tank fuel level, once it primes   
it will be aided by an inherent siphoning action.  Make sure to use a   
high-flow filter between the tank and pump as well.

 Dave

 ----------
From:  Ric Rainbolt
Sent:  Wednesday, March 19, 1997 5:50 PM
To:  diy_efi
Subject:  Mounting Orientation of Bosch Fuel Pump

I have a Bosch fuel pump, as used on BMers, etc and I was wondering if   
there
are any restrictions on mounting axis.  Normal mounting for the cars I've
seen seems to be with the inlet and outlet of the pump parallel to the
ground.  What I need to do, because my engine bay is so heavily modified,   
is
to mount the pump with the inlet down and the outlet up, in other words,
straight up and down.

Will this promote cavitation, air bubbles, drain-back or any other
undesirable side-effects?  Any comments?

Ric Rainbolt