fuel filter location

[John Hess]

Most pumps would rather push than pull (suck),  even your well pumps at
home (for those who have wells).  It all has to do with gravity and it
being easier to push a fluid up a pipe than suck it from the top.  Some
of the problem has to do with efficiency in that when you suck, the pipe
is initially filled with low density air.  You have to create a low
enough air pressure to pull the liquid up the pipe before the pump can
act directly on the much higher density liquid.

I know, I know.  Everyone is going to tell me that there is not much
rise in a car situation;  but, with the forward momentum (acceleration)
of the car, there is still a deep gravity well to overcome.

>----------
>From: 	James Weiler[SMTP:james at brc.ubc.ca]
>Sent: 	Monday, August 11, 1997 9:38 PM
>To: 	diy_efi at coulomb.eng.ohio-state.edu
>Cc: 	diy_efi at coulomb.eng.ohio-state.edu
>Subject: 	Re: fuel filter location
>
>
>
>On Tue, 12 Aug 1997, Simon Quested wrote:
>
>> This is what I have found out about installing your own efi.....
>> 
>> 1) the fuel pump needs to be as clost to the tank as possible.
>Why?
>
>I'm not saying you're wrong.  Just asking.  Is there something about the 
>way a pump is designed such that it would prefer to push rather than pull?
>
>I was going to put mine there as well.  Now I'd like to know why I made 
>that decision.
>
>thanks 
>jw
>