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Discussion Starter #1
Are all coils the same? What differentiates a coil specified for an EFI foxbody vs any other coil, besides the obvious wiring connections.
 

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Number of turns

Coil saturation time

Type of Iron core used
 

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Discussion Starter #3
I take it any one of those three things can make a coil suitable for one application not so suitable for another?
 

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yes or a combination

cd or inductive ignitions have different needs
 

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Discussion Starter #5
So any coil made for CD ignition will work with......any CD ignition?
 

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that is an engineering question

therefore you go with the recommended coil for the ignition you want to use.
 

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Discussion Starter #7
That's kinda what I figured, when my ignition company says to run a $230 coil I begin to wonder if there's an alternative to that coil......or that ignition completely.
 

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if you can get the specs, you can try to match for cheaper, might not be better

there is a good reason why the stock coil works so well with the stock ignition

and why a CD ignition is not really that good for a street car
 

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Discussion Starter #9
For the time being I'm going to run my MSD 6530 ignition, later this summer I will be switching to an EDIS. MSD and the lovely internet give conflicting recommendations on what coil to use.
 
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