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Farmall & IHC Tractors Discussion Forum
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Farmall H igniton coil

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Farmall OR

01-09-2006 18:47:56




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My H has a battery ignition with IH coil. Would a regular automotive coil be better? I am running a 12V battery and have a resitor.




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Mr. farmall

01-10-2006 11:43:35




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
I forgot to say that I also use a 12 volt electronic ignition kit in my A. It does work a lot better than the points ever did.



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John T

01-10-2006 09:34:39




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
OR, I doubt a stock automotive coil would "improve" things much over a stock IHC coil, although it ought to work okay. Similar, even a super coil wont yield all that much improvement (will some and in theory) so long as youre still using mechanical points to switch the coil current. Just make sure if you continue the use of an external ballast resistor the coil you use is EITHER a 6 volt coil or one thats labeled "12 volts for use with an external ballast" If you keep the ballast and used a true full 12 volt (internally ballasted) coil, then the spark would be considerably weaker.

Those so called super high voltage coils still fire at the approximate same voltage a stock coil would. The firing voltage is a function of the spark gap distance and the medium (fuel and compression) in which it fires. Just cuz a coil has the capacity and ability to arc current across a wider plug gap or at higher compressions dont mean it does so. The secondary voltage will only rise to a high enough level to arc current across the plug gap. Where those high energy high voltage super coils shine is when coupled to an electronic switch and you run a wider plug gap and discharge more energy (Volts x Amps x Time) Wooooo o Hooooo ooooo o.

John T

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Mr. farmall

01-09-2006 21:58:33




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
I use a high performance coil on my A and it seems to work a lot better than the cheap stock coils, there is also epoxy filled ones for high vibration protection which is good for tractors.



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walter south texas

01-09-2006 20:16:33




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
i use it and it works great i even have one with a built in resistor and it will clean up the wiring nicely.



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old

01-09-2006 19:42:43




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
On a lot of my old tractors I use a coil for like a 1969 chev pickup on them. There true 12 volt coils and work just fine. Now it will not give you any more power or any thing but they work very well and are cheaper then a lot of other type of coils. I've had on on one tractor for about 15-20 years now and it always starts unless I forget to put gas in it.



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Bob

01-09-2006 19:36:27




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 Re: Farmall H igniton coil in reply to Farmall OR, 01-09-2006 18:47:56  
Most likely, NO.



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