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Coil Wire Length

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Old Sep 20, 2021 | 04:36 PM
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Default Coil Wire Length

I am considering moving my ignition coil to another spot that would require the wire to be about 2 foot long. Is there an optimal length or can you have issues with it this long?
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Old Sep 20, 2021 | 06:49 PM
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MSD used to say 48" for a blaster coil, then switched to 36"
The closer the better but at the same time the cooler the better....
M
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Old Sep 20, 2021 | 09:06 PM
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Originally Posted by Mooser
MSD used to say 48" for a blaster coil, then switched to 36"
The closer the better but at the same time the cooler the better....
M
cool, thanks!
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Old Sep 21, 2021 | 01:30 AM
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Depends on whether you still have (and need) the stock resistance wire going to the coil. If you have converted to electronic ignition which needs straight 12 vdc, the resistance wire should be replaced with standard wire. Then, any length of wire would be OK. If you still need the resistance wire, just extend that wire with length of standard wire to give you the length you need. The correct resistance for stock ignition will still be maintained by the resistance wire in that run.
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Old Sep 21, 2021 | 02:00 PM
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Originally Posted by 7T1vette
Depends on whether you still have (and need) the stock resistance wire going to the coil. If you have converted to electronic ignition which needs straight 12 vdc, the resistance wire should be replaced with standard wire. Then, any length of wire would be OK. If you still need the resistance wire, just extend that wire with length of standard wire to give you the length you need. The correct resistance for stock ignition will still be maintained by the resistance wire in that run.
good to know. It’s electronic msd now. Where I have it now is good but po removed short hood and wiper door for a long hood. I’m debating putting a short lt1 style hood on it but would them need to rebuild the whole wiper door system.
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Old Sep 22, 2021 | 02:22 PM
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Not so long ago, cup, busch & trucks still had carbs & distributors w/ twin pickups and a switchable pair of coils & CD boxes. Except for dist, the rest was inside cabin; often atop dash. There's quite a stretch between coils-coil selector to dist; especially motors w/ front dist.
https://www.holley.com/products/igni...ies/parts/8210
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