Re: Help with hooking up an electric pump.
Posted by Dave Kenney On 2009/2/2 20:42:36
Quote:
carlmadsen wrote:
Any discussion on creating a separate return fuel line to the tank from a T fitting added to the main fuel line right before the carb? This allows the excess pressure to return to the tank, and to keep the fuel temperature low by thermal exchange with the cooler fuel in the tank.
I don't use my electric pump except to prime the carb after a long sit. I carry a length of hose and two fittings so in the event the mechanical pump fails I can bypass it and be on my way with the electric. I really don't see a need for a T fitting and return line but I DO see a need for a way to shut the electric pump off if the engine quits as in an accident like that on modern cars. I have thought about hooking the pump electric wire to a oil pressure switch and using two fuel lines as described in the PAC article ( Seagraves method) but since I only use the pump for starting I omitted this item.
Quote:
One further question - was there originally a heat shield to deflect the heat from the exhaust manifold away from the mechanical fuel pump?
There were fuel pump heat shields on the straight eights from at least the late 30's to 1954 if I recall. I have never had a vapor lock problem on my '47 which does not have the shield installed but maybe because it never gets hot enough in these parts. I just bought an original one on eBay for $30.
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