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Old 10-13-2017, 11:00 AM   #21
G.M.
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Default Re: Coils

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Originally Posted by BUBBAS IGNITION View Post
Guys this is a difficult discussion to follow and many of the replies are correct . However we need to stop and qualify a couple things.

What coil are we discussing ???? The early ford six volt coil or a later can type coil?
The early Ford Helment coil drives down the road at approx 3.4 volts after the resistor , this was changed when the coil went remote on the 1946 to 48 and then again in 1949 to 1953. Each system is a stand alone issue and each primary coil circuit is a different discussion.
Then add the fact that we use aftermarket coils from many suppliers with no regard to the actual factory design and the problem gets worse. I just was trying to help a friend with a ignition issue and finally after a year or so of problems he brought the coil and distributor into the shop for me to look at. The coil was green and said John Deere on it!! Testing showed very low resistance, i asked where he got that coil and he said off my neighbors lawn tractor!!!!
Maybe we need to start another thread and qualify the type of coil being discussed and forget the convertor issue ??
The 46 to 48 Ford coils operates at the same 3.5 to 4 volts as the 32 to 48
coils. After 48 Ford went to the round coil. G.M.
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Old 10-13-2017, 05:23 PM   #22
BUBBAS IGNITION
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Default Re: Coils

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The 46 to 48 Ford coils operates at the same 3.5 to 4 volts as the 32 to 48
coils. After 48 Ford went to the round coil. G.M.
Thats just barely more than two D cell flashlight batterys. I always wondered if a flathead would run on two D cells ???????

You meant to say 1942 to 1948 didnt you...?
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Old 10-13-2017, 09:22 PM   #23
G.M.
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Default Re: Coils

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Thats just barely more than two D cell flashlight batterys. I always wondered if a flathead would run on two D cells ???????

You meant to say 1942 to 1948 didnt you...?
If the batteries supply 2.5 to 3 amps I don't see why they
wouldn't run the ignition on a 32 to 48 Ford. But I doubt
they would carry 3 amps. G.M.
I was thinking, 3 D batteries with no resistor??
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Last edited by G.M.; 10-13-2017 at 09:38 PM.
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Old 10-13-2017, 10:38 PM   #24
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Default Re: Coils

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The only way a Ford 6 volt coil with the original Ford resistor will melt is with the ignition switch left on and
the engine not running. G.M.
G.M., you said almost exactly the same thing in post #15 of this 2011 thread...
https://www.fordbarn.com/forum/showthread.php?p=268584

But I found out another way. I have a car with a battery cutout. I roll-started the car which was pointed downhill. I had the cutout off, which I didn't notice since I didn't use the starter. Within ten miles I'd done this to the coil.
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Old 10-14-2017, 07:48 AM   #25
G.M.
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Default Re: Coils

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Attachment 334237

G.M., you said almost exactly the same thing in post #15 of this 2011 thread...
https://www.fordbarn.com/forum/showthread.php?p=268584

But I found out another way. I have a car with a battery cutout. I roll-started the car which was pointed downhill. I had the cutout off, which I didn't notice since I didn't use the starter. Within ten miles I'd done this to the coil.
At least I'm somewhat consistent even at 85. G.M.
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