<VV> RE: WC: Fuel Pump Question

[Bob & Kathy Gilbert]

Hi,
 
I can accept that pumps do a better job of pushing than pulling (but I'd
still like to know why) but what little I remember from my fluid dynamics
courses at university was that pressure drop for a given fluid is primarily
a function of pipe cross section and length, not whether you are pushing or
pulling the fluid. That was why I was at a loss to understand why pump
location mattered.
 
BTW, thanks to everybody who responded! Best guess now is that it is a fuel
problem and the most likely source is the location of the fuel pump since
everything else is new. Tonight I'll relocate the pump.
 
Many Thanks!
Bob
 

  _____  

From: corvairs-owner at cybrus.net [mailto:corvairs-owner at cybrus.net] On Behalf
Of Bording Ostergaard
Sent: July 5, 2005 10:52 PM
To: corvairs at cybrus.net
Subject: Re: WC: Fuel Pump Question



More length on the input side will decrease flow and pressure, otherwise
they would have put one big pipeline pumping station for Trans Canada
Pipelines at Sarnia end and done all the sucking from down East.

- Bording


At 06:34 PM 7/5/2005 -0600, you wrote:


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 From the Western Canada Corsa list server at corvairs at cybrus.net
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This is a follow on to my earlier trials with a car that seems to be starved
of gas.

I have an in-line electric fuel pump and decided to mount it at the rear but
at a point in line with, if not lower than, the lowest point on the fuel
tank.

Earlier, about half the replies I got said it is OK to mount it there while
the other half (and the instructions) said mount it as close to the tank as
possible.

My question is - why should it matter as long as the pump is below the
bottom of the tank? Whether it sucks from a tank 8 feet away and pumps to a
carb about 4 feet away or sucks from a tank a few inches away and pumps to a
carb 12 feet away shouldn't matter - or does it? Does the pump work in some
sort of asymmetrical fashion?

Thanks,
Bob

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* Bording Ostergaard
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* bording at cybrus.net
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