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Fuel Pump replacement

Post by zoidberg » Subscribing Member » Fri Mar 06, 2020 11:33 am
Joined: Sat Aug 31, 2019 12:08 am
Posts: 88
Hi,
I am in the process of converting my bedford to efi, which means i need an electric high pressure fuel pump.
Now i think about just putting the high pressure pump behind the mechanical pump. But that will then just create more potential problems.

Can i just let the mechanical pump run dry? Or will it seize and do bad things?

Can i remove it replacing it by a steel plate?

So many questions.
Has anyone replaced their mechanical fuel pump with an electronic one?

Re: Fuel Pump replacement

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Post by Phil Bradshaw » Club admin » Fri Mar 06, 2020 12:51 pm
Joined: Sun Sep 02, 2012 7:15 pm
Posts: 4550
Mechanical pump will pass fuel delivered by an electric pump. Check the flow rate though: what works for carburettor models may not be sufficient for EFi.

Letting a mechanical pump run dry shouldn't harm it: lever arm and link are lubricated by splash from the auxiliary shaft. The unknown factor will be when the diaphragm eventually will fail due to age, when the pump will be useless.

Steel blanking plate about 3mm thick will be the least complicated answer I think: less pipework and only the one pump to consider when problems arise. :)

Screw threads in the cylinder block are 5/16" UNC.
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  • What is real is not the appearance but the idea, the essence of things. Constantin Brâncuși

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