12 volt starting

[Topsterguy]

I've changed my 36 to 12 volt and need to know if I'm missing anything required yto change for the starting circuit. I used a Ford starter solonoid with 2 large studs and 2 small ones marked S and I. The S goes to the start terminal on the switch and I'm thinking the I goes to the + on the coil via a 1.5 ohm resistor block. I'm using a stock crab distributor. What about the condensor , it's from the 6 volt days so far. Any and all advice would be appreciated - haven't touched flatheads since I was a kid!

[Bob C]

It would help if we had the part number of the solenoid you
have as they can have different internal wiring. See the diagram that was posted in another thread.

Bob

[V8COOPMAN]

The condenser doesn't care about voltage, although if it is an old one, it MAY be junk.

Change all of your light bulbs to 12v types. DD

[Topsterguy]

Originally Posted by Bob C

It would help if we had the part number of the solenoid you
have as they can have different internal wiring. See the diagram that was posted in another thread.

Bob

It's "Select" brand #S63 . The coil is "Select" # E30 if that helps.

[Topsterguy]

Originally Posted by V8COOPMAN

The condenser doesn't care about voltage, although if it is an old one, it MAY be junk.

Change all of your light bulbs to 12v types. DD

Thanks! Yeah everything else is changed and fine.

[JSeery]

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The "I" does not go to the resister, it is a by-pass of the resister to apply 12v to the coil during starting. There is only power to the "I" terminal when the ignition switch is in the START position, in RUN the power to the coil is through the resister. The idea is because the voltage is pulled down during cranking the starter that the "I" by-pass applies increased voltage to the coil for starting. Higher voltage for a short period of time is not an issue for the coil or the points.

[Andy]

You need a ign switch with two terminals. The 12v solenoids work with voltage applied vs. the 6V style that just grounds it. You need to send 12V to the solinoid.

[Bob C]

Looks like it is a #3 circuit.
If you want it to work with a grounded starter button
it looks like an S601 solenoid would work, it is circuit #2

Bob

[Topsterguy]

Got 'er done! Thanks all!