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Forum: Ignition System

08-01-2009, 08:56 AM

Replies: 42

Sticky: Some Comments About Coils

Views: 78,235

Posted By smosher

I have the pertronix coil and it didn't come with...

I have the pertronix coil and it didn't come with a ballast resistor.

I should measure the coil but if the 3.0 ohm coil is actually 3.5 or greater then it would be close enough to 4 amps. I'm...

Forum: Ignition System

07-31-2009, 07:13 AM

Replies: 42

Sticky: Some Comments About Coils

Views: 78,235

Posted By smosher

to calculate amps the formula is voltage /...

to calculate amps the formula is voltage / resistance(ohms) = amps

14.2(output from Alternator) / 3.5 (coil resistance) = 4.05 amps

The Pertronix coil states is has a resistance of 3.0 ohms...

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