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I have a HEI setup in my 70 396 with the stock module and a external Jacob's coil, will switching to a Accel or even a different GM module make any difference?
 

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The aftermarket modules advertise better coil saturation due to longer dwell time. Will you "feel" a difference? Probably not, at least I didn't. I saw a little bit of difference in gas mileage though.
 

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Narti,
Unless you plan on turning the motor over 6500 rpm regularly, I doubt that you will see any difference. That is about the point that the stock module starts to "lay down" a bit.

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Bill Koustenis
Advanced Automotive Machine
Waldorf Md
 
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