[DeTomaso] Fuel Pump Plumbing

[JDeRyke at aol.com]

In a message dated 7/19/08 5:38:07 PM, claywillmott at hotmail.com writes:


> Does anyone have an electric fuel pump that both pushes and pulls on their 
> Pantera?
> 
FWIW, Ford warns against using electric pumps that suck- they say the sucking 
action lowers the boiling point of the fuel, making vapor lock easier. But 
pulling from the stock tank-out line to the mechanical pump doesn't do this 
because of the low mounting. Since the mechanical pump-in fitting is below the 
tank, a siphon is set up once the pump is primed, so the pump doesn't have to 
lift the   gas- the siphon does that.
A second thought is insulating the pump-to-carb line. I used a stock 
insulating sleeve from a junkyard, made for an '87 Pontiac Fiero fuel line and its 
exactly the right length to go from the Pantera's mechanical pump, up next to the 
distributor. Cost   was $1.00. There are commercial sleeves available, too. 
Third, if the intake is getting too hot, the fuel in the carb may boil. An 
insulating spacer between the carb & intake will help. PPC-Reno makes these in 
phenolic for Summit speed shops and there are other sources, too. Even wood 
spacers work and is easy to make in a home garage. No particular thickness is 
needed, unless you're also looking for more power or trying to fit under a 
particular engine screen. Good luck- J DeRyke


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