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Tractor Pulling Discussion Forum

Hot coil

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XXX pulling

02-26-2004 07:46:32




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Any one a believer in a hot coil. I've heard a stock coil can supply enough voltage for any need.




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XXX pulling

02-27-2004 20:11:48




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 Re: Hot coil in reply to XXX pulling, 02-26-2004 07:46:32  
Sorry about the confusion guys, I forgot to say what I was talking about. I'm running a magneto. A guy I know who rebuilds his own mags uses a tester to measure kilovolts and says he gets no difference in readings between a stock & hot coil. Just looking for more opinions or personal experience.



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CASEPOWER

02-28-2004 15:23:10




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 Re: Re: Hot coil in reply to XXX pulling, 02-27-2004 20:11:48  
A coil on a engine is firing fast. On a V-8 running 3000 RPM it fires 12000 times per minute or 200 times per second to get every cylinder. A tractor at 3000 x 4cyl. would be 100 times per second. Voltage coming from the coil is only one factor. On a tractor @ 3000 RPM's the coil has 1/100 of a second to build up it's field, break down, and produce a spark. At 1500 rpm's it still fires 50 times a second. The reason for dual point distributors was to help the coil do it's job. New coils are just better then old coils and that's the bottom line. Some aftermarkets may or may not be better then OEM.

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WIld Horses

02-27-2004 10:30:00




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 Re: Hot coil in reply to XXX pulling, 02-26-2004 07:46:32  
I've run an Accel yellow coil (40000 V) and have never had a problem with points. It does make a noticable difference from a standard coil. I can't say how much exactly, never had it dynoed but it was good for 20 or so feet.



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buickanddeere

02-27-2004 10:08:56




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 Re: Hot coil in reply to XXX pulling, 02-26-2004 07:46:32  
For high energy and being able to jump across the plug a low impedance coil with high voltage is required. Usually matched with an electronic system as the higher current draw burns points out too quick. A wider plug gap allows a leaner idle to limit fouling and easier starting. More voltage with current behind it helps ignite exotic fuels under high combustion chamber pressures.



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John

02-27-2004 08:43:27




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 Re: Hot coil in reply to XXX pulling, 02-26-2004 07:46:32  
Not sure I have ever seen an x-rated pull.
A hotter coil will allow you to run a little more plug gap and will be less apt to foul. Add that to an electronic ignition module and she will start and run better. Yes they are worth the $10 more money.



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770

02-26-2004 18:04:11




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 Re: Hot coil in reply to XXX pulling, 02-26-2004 07:46:32  
Good hot spark is always desired. Properly timed, a hotter spark can help ignite and burn the air/fuel both faster and more efficient. Not to overestimate it, but it just doesn't cost that much to do without.



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770

02-26-2004 18:05:15




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 Re: Re: Hot coil in reply to 770, 02-26-2004 18:04:11  
PS..... I assume you're talking about electronic ignition.....



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