Yarp, but the question was why setting the way being discussed in this thread produced a different result when checked using the one cylinder at a time method. It would seem the base circle may not be concentric with the bearing journals, or is not a circle?
Compared to the one cylinder at a time method you’re not setting the clearance on the same part of the base circle using the way being discussed here and the base circle probably isn’t ground perfectly round. Cam manufacturers aren’t going to spend time and money getting the base circle perfect when it doesn’t need to be and they certainly don’t get the lobe lift perfect when it should be - maybe Web do.
Or because the rockers wear and have different adjustments depending on where in the turn the adjuster screw ends up , I take them off and make them smooth
Swivel foot adjusters start flat and wear flat, the movement is in the ball and socket. Standard adjusters start convex, and wear out.
I'm creeping up on that aren't I? Heads has turned into B&P's with pistons requiring conrods rebushed... At that point it's almost dismantled. But if I cam up I could use flat top and not have to rebush the rods so that "excuse" is lost. Just lately I'm thinking skim the heads, 1mm copper ring, CR down from 8.7:1 to about 8.1:1. Might as well have 4.5mm deck as 3.5mm. Cheap temp CR fix.
