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Old 06-02-2019, 04:44 PM   #1
biggieou
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Default Coil question

Is a Model A coil the same as a 50 Merc's? Obviously both are 6v.

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Old 06-29-2019, 07:05 PM   #2
frank d kirkstad
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Default Re: Coil question

Years ago I used the coil of my dads 55 ford to get my 30 model A started.I had to give it right back the 55 was our family car at the time.
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Old 06-29-2019, 07:10 PM   #3
frank d kirkstad
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Default Re: Coil question

Years ago I used the coil off my Dads 55 ford to get my 30 model A started.I had to give it right back,the 55 was our family car at the time.
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Old 06-30-2019, 12:54 AM   #4
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Default Re: Coil question

I am not Bubba ,but Some time coils have been changed over the years but I think you will find it will work quite happily, I have used VW ones on v8s ,
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Old 06-30-2019, 01:36 AM   #5
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Default Re: Coil question

It'll probably work okay, if its a good coil and If the resistance is correct. Early yblocks (54-62ish/6v voltage reducer inline to the coil) used 6v can coils and can be bought from local parts stores. Internal resistance is higher.


lot of maybes though... and the best thing about being wrong is you learn something.

Last edited by Tinker; 06-30-2019 at 01:44 AM.
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Old 07-01-2019, 03:55 PM   #6
supereal
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Default Re: Coil question

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Some round coils have a builtin resistor, and should not be used in a circuit that already has a resistor, or the output will be weak. New coils for the early four cylinder applications, B-12000 are available for $20 from C&G. All original coils are faukty due to deterioration of the internal insulation. We have been buying old coils at swap meets for years as cores to be sent to Skip Haney for a rebuild. If you need a whole new coil, he has them for most applications. Rebuild for $90 including shipping. His email is skiphaneyfl/@aol.com. Good guy, fine work.
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Old 07-01-2019, 05:49 PM   #7
rotorwrench
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Default Re: Coil question

The old originals likely had dioxin oil or something equally nasty inside to act as an insulator. The modern reproductions are more likely to be made with the same internal construction and materials as any 1.5-Ohm primary cylindrical can type coil. The can type coils generally don't need a ballast on 6-volt as long as they are no more than 1.5-Ohm. The later type coils for early V8 engines do need a ballast due to the design of the coil core and the way the coil windings had to be arranged around it internally. When they went back to the can types in 1948/49 they didn't need to use a ballast.
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