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Electric fuel pumps (was: vapor lock revisited ...)

To: datsun-roadsters@autox.team.net
Subject: Electric fuel pumps (was: vapor lock revisited ...)
From: "John F Sandhoff" <sandhoff@csus.edu>
Date: Tue, 28 May 2002 15:46:38 -0700
A couple of comments:
> (Who makes a good electric fuel pump, and where should it be
> installed on a Roadster. 

Electric pumps should be mounted as close to the tank as is practical.
Electrics are meant to push the fuel, not pull it. Also, the point of going
electric is to keep the fuel system at a positive pressure.

This also means that you should be certain all your hoses and lines
are in good shape!

> Also, what is the importance of an oil pressure safety switch if
> installing an electric fuel pump.)

Your life. Your passenger's life. The life of others involved in a collision
with your car.

If you hit something, or roll over, and your fuel line ruptures, the electric
pump will happily spray gasoline all over the place. A cutoff switch will
shut down the pump before it creates a 5 gallon puddle in the street.
Anybody running an electric should put in some form of collision switch!
Holley makes a three-wire one that will activate the pump during
cranking and when there's oil pressure (you need to activate the pump
before the engine will start if the carbs are dry).

-- John
     John F Sandhoff   sandhoff@csus.edu   Sacramento, CA

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