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Old 06-15-2011, 04:42 AM
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0gauge cable from battery in the trunk

It has been said to run a heavy cable to the starter via a solenoid
(o gauge) and another smaller cable to power everything else via
a 50amp max fuse (8 gauge). These being average values.
What are the thoughts on bypassing the solenoid with a 50amp
max fuse. When the solenoid is activated full power goes through
the solenoid to the starter. When released the cct. is then
protected by the fuse powering everything else. This would
eliminate the need for the extra 8 gauge cable.
The fears of having the 0 gauge cable hot all the time would be
elivated due to the protection by the fuse.
The thought is that no matter what size cable is used the 50 amp
fuse would do the protecting be it 0 or 8 gauge.
Also would the solenoid activate quick enough to prevent inital current
draw from blowing the fuse?

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Old 06-15-2011, 11:48 AM
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Run a short 0 gauge to a Ford solenoid close to the battery. From the other terminal of the Ford solenoid run an 0 gauge cable to the starter. At the starter, you can either fab a connector from the battery terminal to the "start" terminal or you can find a Ford C8VY-11072-A. Run your start wire from the ignition switch to the Ford solenoid. The cable from the Ford solenoid to the starter will be dead unless you have the switch in the "start" position.

Then run your 50 amp fused cable from either the battery or the "hot" side of the Ford solenoid.

Added advantage. The Ford solenoid draws about 1/6th of the amps the Chevy solenoid does so your ignition switch lasts longer.
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Old 06-16-2011, 05:02 AM
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Yes . The method you discribe is the way it is done. The idea I was suggesting would eliminate the need for the extra 8gauge cable.
There is power to the car via the 50A fuse.The start switch activates both the Ford solenoid and the solenoid on the starter. This bypasses the 50a fuse (across the ford solenoid) momentarily. Once the engine starts the solenoids are released and power now goes through the 50a fuse powering the car still using the 0gauge cable but protected by the 50a fuse. The jumper you mentioned is not used.The starter is wired as normal.
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Old 06-16-2011, 09:24 AM
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In theory, jumping across the Ford solenoid with a 50 amp fuse would work. I see two potential problems. First, you are now increasing the amps through the start circuit of the ignition switch instead of decreasing them. Second, the Ford solenoid would have to engage at or before the engagement of the starter solenoid. If it were late, the fuse would blow.

A simple fix for both problems would be to get the older style 4 terminal Ford solenoid. The extra fourth terminal was the resistor bypass to the coil. You could run a wire from it to your starter "start" terminal. That way the Ford solenoid would have to be engaged before power went to the starter.

I would still have a couple of extra 50 amp fuses in the glove box. Or go to a circuit breaker.
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Old 06-17-2011, 05:12 AM
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Yes, the 4 terminal solenoid would ensure the safety of the fuse. Also 2 seperate start switches would work. The first switch would activate the Ford solenoid, then the second the starter.
Now enters the issue of starting procedure and the one of a kind cct. which to a second party (for starting and service) would not be easy.
Thanks for the discussion. I now think it would be best to stick with the tried and true method.
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