Quote:

Get out your mic and measure the lobes top and sides see how much wear you have



I think unless a cam is extremely low duration that's not possible by directly micing the cam. With the lobe at 12 o'clock the 3 and 9 positions are well off base circle.

A person could measure the lift with the cam still in a block very accurately though.

Besides, virtually ANY measurable wear is a bad cam, as once it starts to go it goes very fast, and usually looks pretty ugly (scoring, galling) in the process.