I think the Intake Opening event is subjective when going by Degree-wheel readings:
ILC from IO to IC gives a Measured result BUT, i think there needs to be a bias on the number so you know the ILC might effectively be an effectively advanced value above the measured value.
I always assume non-symmetric lobes.
While in there; Try for 2 types of ILCs based on "onset of Opening/closing, and 0.005" lift for ILC. Oh sure 0.050" values could be an3rd basis but not as defining the Idle result as 0.005".
Same goes for Exhaust ELC from EO to EC, but sooo less critical.
My last Cam Degree activity was fraught with looseness from every possible non-fixturing frustration. And the 14" dia degree wheel in 1* toothed increments magnified my lack of accuracy. I gave up and sold the ( Spare ) engine with explanation of the degree activity.
Was easier 40 to 30 years ago, when i was not sweating the precision details.
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