Quote:
Originally Posted by Grumpy Rick
..... Got my Carter 4070 today, and hope to install it next week. I will put it back near the tank. I am undecided about how to hook it up. I could put a switch to use it only when the carb is dry from sitting, or I may just hook it up the the ignition.
Any reason not to run it along with the mechanical pump??
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Put a fuse in the wire for it right at the source for its power, to protect the whole run of wire.
If you intend to only use it to fill the carb after sitting you could use a momentary / push button switch powered off of the 'run' position of the ignition switch.
As long as your mech pump is working good there's no reason to run it all the time, and it should last longer too.
If it's on a toggle switch wired to the ignition switch give some thought to what might happen in an accident if the electric fuel pump kept running.
An oil pressure safety switch or a fuel pump inertia switch, from a later model salvage yard Ford, would be a good idea. (I don't know what year's to look for / would be best.)
I was trying to think of something super simple, without having to add a handful of extra parts: switches, plumbing, indicator lights, whatever... and thought of having the power for the elect fuel pump come from the 'start' position of the ignition key switch or the "I" terminal of the starter solenoid. But then it wouldn't pump until the engine was cranking. It might or might not be enough, and would come on every time.
Since the weather here is pretty decent most of the year I'm hoping my '55 won't be sitting for long periods of time, and am leaning toward a push button switch IF it needs an elect pump.
Usually a mechanical and electric pump in the same line don't bother each other, sometimes it depends on the internal construction of the elect pump.
Oil pressure safety switch...
https://www.summitracing.com/parts/sum-g1438
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