The answer is yes, you can put the fuel pumps "in-line." I know people
that use exactly the setup you describe. If the SU fails, they just
switch the wires to the other pump. If I recall, one individual already
has the backup wired with a switch, so when (not if) the SU fails, all he
does is switch it off and switch on the backup. Since I enjoy crawling
under the car by the roadside with semis flashing by, I use the old
method of carrying an extra pump ;-)
David Littlefield
Houston, TX
On Fri, 14 Mar 1997 10:53:04 PST dfdarby@juno.com (David F. Darby)
writes:
>Ladies and Gentlemen:
>
>This is a deviation from the actual question at hand, but I have been
>wanting to ask this for some time as it bears on an emergency fuel
>pump system I would like to setup.
>First, forgive me for not completely understanding the inner workings
>of
>these pumps. We have two types of electric fuel pumps from which to
>choose for our LBCs: the traditional Skinners Union type with contact
>breakers either in positive ground (earth) or negative ground and the
>electronic breakerless variety.
>Now, my questions: in the event of pump failure, would another pump
>mounted inline, either pushing or pulling, move fuel through the
>disabled pump and thus keep the fuel system operative? Would the
>non-functioning pump's diaphragm effectively act as a check valve and
>not allow fuel through? Has anyone tried this?
>Thanks for your consideration.
>
>David F. Darby
>Hercules Wilderness, MIssouri, USA
>MGAs, MGBs
>
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