Stop in for a cup of coffee
Once its running, the alternator has the system around 14 V and it doesn't need that much, maybe not even 12 Volts.
Here's my understanding of the coil voltage. Maybe you can say if its right or wrong.
The way I understand this is the ringing is left over energy. So there's nothing gained by having more than is needed to initiate and then maintain the spark. All it would do is make the coil hot.
I think the 12V coil was helpful for starting the car. Maybe also helps the coil develop higher output voltage? Is it harder for a spark to jump the gap when the engine is cold? I think so.
Once its running, the alternator has the system around 14 V and it doesn't need that much, maybe not even 12 Volts.
Here's my understanding of the coil voltage. Maybe you can say if its right or wrong.
The way I understand this is the ringing is left over energy. So there's nothing gained by having more than is needed to initiate and then maintain the spark. All it would do is make the coil hot.