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Pure BS. 20 minutes swith a cam. analyzer and all that info .magically appeaes.
FWIW,I always install cams with the degree ring straight up to begin with and check P/V clearances. Then I set the cam at 4-8 degrees retarded and check P/V clearance. Same with advanced 4-8. That way I am assured of adequate P/V clearance at whatever I deem best with testing. On my engines I am usually limited to 4*.. All you will gain with moving the ICL will be about a 400 rpm shift up/down the peak torque rpm. I'm not convinced the 800 rpm shift that the ID guys say they feel is all reality. But I won't say it's impossible using really bad cams to begin with. Boparts is just blowing smoke about his cams and is also covering his ass. I do not like that in a supplier.