Cam degreeing. I totally don't understand.

Bewy said

Crane cams claimed that if you adv/ret the cam, it needs to move 4* [ that is crank degrees, not cam degrees ] before the butt-meter will feel it...

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Possibly true.....also true is if you have to move it that far, you have one of two things. Either the cam is a gross mismatch OR you have some piss poor quality parts. Or possibly both.