Performance distributor gear installation

Quote: Some people make the effort to figure these things out. Some people don't. They coast on the efforts of others.

You're forgeting those of us that prefer to "get to the point" after analyising the problem then issuing the statement. Also, "third order harmonics", where did that come from, I'm curious to see the vibration analysis program that was used to determine that a third order even exists and the theory of the causes of this condition.

Do some research on the war effort to increase the reliability of straight six engines.

Do some research on the very early Datsun 240Z engines imported into the USA and why their crankshafts failed.

Do some research into straight six Jag engines and why there was a problem at just under 6000 rpm with harmonics -- I believe it also affected fuel in the SUs.