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On 4/17/14, 6:09 AM, Co60bishop wrote:
I am confused by Jim's comment. The distributor definitely does make and break high voltage. The center of the distributor cap is one high voltage connection and then tie the outer spark plug wire connections together for the second connection. You can use a 4, 6, or 8 cylinder distributor and experiment with how many spark plug connections you use depending on the RPM of the motor spinning the rotor if you like. The distributor is designed to make and break upwards of 30KV.
The pulse from the coil is very short (<1 ms) and occurs when the rotor
is near one of the spark plug terminals. By the time the rotor has
moved away from the terminal, the HV is long gone.
At 6000 rpm, the distributor turns at 50 revs/second (20
milliseconds/rev). So on an 8 cylinder engine it takes about 2.5
milliseconds to move from one plug to the next.