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04-24-2012, 09:35 PM | #1 |
Junior Member
Join Date: Feb 2011
Posts: 17
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resister required for a replacement coil
I bought an Accel 8140 Super Stock coil to replace what looked like the original coil on my '57. Good coil, I'm sure, but the package says nothing about an external resistor. Back in the day, coils came with a notice indicating that it did or didn't require one. I even went to the Accel homepage and still nothing. The original 57 uses one of course. Can anyone shed some light on this? Thanks.
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04-24-2012, 09:43 PM | #2 |
BANNED
Join Date: Jun 2010
Location: Utica, Ohio
Posts: 522
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Re: resister required for a replacement coil
If I was in dought I would use a resistor. Can't hurt coil with resistor but, without it could fry the coil.
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04-25-2012, 07:27 AM | #3 |
Senior Member
Join Date: Dec 2010
Location: Howell, Michigan, USA, The Peoples Slightly Overspent Demodependancy of Michigan
Posts: 638
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Re: resister required for a replacement coil
It's not the coil so much as the points if you're still running them. I would use the resistor. With points or a Pertronix system, a resistor should be used.
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04-25-2012, 02:40 PM | #4 |
Senior Member
Join Date: May 2010
Location: oroville ca.
Posts: 1,554
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Re: resister required for a replacement coil
it needs a resistor, 1.35 ohm in the line to the coil, if the coil is getting around 9v to the coil after the resistor your fine
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04-25-2012, 03:17 PM | #5 |
Senior Member
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
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Re: resister required for a replacement coil
Your system (assuming its a point type distributor) requires 3-4 ohms of primary resistance to prevent burning the points up with excessive amps.
So a 1.5 ohm resistor and a 1.5 ohm coil would be 3.0 ohms, and when hot more toward 3.5-4 ohms..... 4 ohms would be 3 amps (where you need to be) and have a good life with the contacts....... |
04-29-2012, 09:08 PM | #6 |
Junior Member
Join Date: Feb 2011
Posts: 17
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Re: resister required for a replacement coil
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