My recently purchased 55 crown has both a stock pump and electric pump. Can they be run together?  When power to electric pump stops, can the stock pump still pull fuel through the electric pump? Should pumps each have there own fuel line.  What would be the proper way to run these and wire them?  Help    Please winter is ending and was to get it on road safely. Snow bound for now

This arrangement is usually used to prime the carb before starting.  That way you don't have to let the engine crank and crank and crank to fill up the fuel bowls after sitting.
Many electric pumps can be used inline with a mechanical pump.  If the one you have cannot, then you simply add a T near the tank with one line going to the mechanical pump and the other going to the electric pump then to a T after the mechanical pump.


Lawrenceville, GA

You will need an Airtex electric pump as they can still pass fuel through them. I have one that I mounted in the engine bay on the fender wall  both my [56 and 35 pickup]. It's used as a priming pump but I guess in a pinch it could still run if there is a failure to the manual pump.



"Came too close to dying to stop living now!"

i have installed several etc pumps on friends cars and the mechanical pump pulls threw the elect . i also use a backup light switch so they must hold the button ,which makes it safe,other wise runs all the time,not good.  the elect has a check have 1 way so does not interfere with mechanical 1.

Thanks for your response's.
 Would it be wise to put a pressure regulator on the fuel line?  If so would it be ok to put before the stock pump?

no

You only need a regulator if the pump provides more pressure than required.  If you need on, it should be just before the carburetor.  


Lawrenceville, GA

If the mechanical pump fails when far from home, you might find that continually holding down a momentary switch while driving would likely prove rather inconvenient. But, since modern vehicles using electric fuel pumps have safety devices that switch off the supply of gasoline (in case of collision) even though the ignition is still powered, adding a warning light to the toggle switch might be helpful for those of us who’s memory is not what it used to be. Of course, if the mechanical pump’s diaphragm fails and a continuously running inline elect. pump floods the crankcase with gas, at best you will probably end up with severe bearing issues (?).

6 VOLTS/POS. GRD. NW INDIANA

When I first purchased my '55 TBird,  I crawled under it and found an electric fuel pump.  Why it was there I'll never know.  I have seen some people install an electric pump to overcome dirt in the fuel or a vapor lock issue.  This fixes the symptom of the problem, not the real issue.   I can see no reason why anyone would need both pumps on a stock Y Block when the stock pump has worked for over sixty years!   I removed the electric pump and put it back the way Ford built it and it works just fine.

a 55 bird with the old style holley carb runs dry due to evaporation  if stored for even 1 week. the elect pump saves on starters and gives you instant starts on any lengthy storage. works great