Same story; that is about right ; DC resistance of a stock coil primary might be slightly different between 6 and 12 v , but both run in 6v area w points closed. If you buy high performance coil has lower DC primary ohms volts will be even lower . Heavier current is equal to more drop in ballast . Trade power for point life . It sort of does not matter 4-6 V ok . Spark energy is 1/2 L I squared . V is only needed to drive the I ( amps) into coil . L is set by turns and size . Not a lot of wiggle room to raise I . Stock set up optimized . Dwell is critcal as to reach I takes a certain time always , to fully charge coil . Barely enough at high rpm .. Why the two points in first place on letter cars . If set too loose high rpm miss coil undercharged. If too tight not clean break = high rpm miss . Coil tower must be spotless silicone grease under cup . Mopars are known for spark jumping under cup to primary terminals . Drove me crazy did not know that on 68 charger new car. Hi rpm miss .
Hope this helps .
Sent from my iPhone
On Feb 27, 2016, at 9:34 PM, Michael Moore <mmoore8425@xxxxxxx> wrote:
Posted by: John Grady <jkg@xxxxxxxxxxxxxxxxx>
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