Fuel pump questions

Gary Derian gderian at cybergate.net
Mon Dec 8 17:35:05 GMT 1997


The atmosphere inside a fuel tank has no oxygen and will not support
combustion.  Electric fuel pumps are safe.  Boeing 747's notwithstanding.

A simple in line pump is not enough.  All EFI systems must have a surge tank
or reservoir at the fuel pump pickup.  Momentary starvation is of no
consequence with a carb but will cause hesitation with EFI.  An external
surge tank fed by an in tank pump with a return to the main tank and a feet
to the high pressure EFI pump works well.  Make sure it is safe, even in a
crash.  Try to put it in a protected area.

Gary Derian <gderian at cybergate.net>


-----Original Message-----
From: Gordon McKenzie <gmcken at direct.ca>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, December 08, 1997 12:15 PM
Subject: Re: Fuel pump questions


>bruce plecan wrote:
>>
>>  Like anything else if you do something wrong, you might have a tank
>> explosion, just duplicate what the EOM manner of doing things and
>> there should be no problem.  There are "millions" of in tank pumps
>> in use today, and if they were unsafe uncle (big brother) ralph, and
>> (big sis) joan would be all over the news with these horror stories
>> of poor design.  Interject names Nader, Claybrook as neseccary
>> Bruce   nacelp at bright.net
>
>What if your application never had an OEM FI application? Is a simple in
>line fuel pump adequate? If I do get a retorfit to my AMC motor using
>old GM TBI parts, is an in-line pump enough or would I need an in-tank
>setup? Either way, I will be dropping the tank (to replace the sending
>unit and plumb new larger fuel lines) but I was looking to use just an
>in-line pump.
>
>BTW, who are Ralph Claybrook and Joan Nayder?
>
>--
>Gord, Sue & Countess McKenzie




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