Explain to me again, please

[SSDiv6]

Originally Posted by Stan Weiss

My understanding is the cam lobe does have a taper. The lifter bottom has a radius to it. The size of the radius depends on how the cam lobe has been ground. I believe from the factory Ford has uses a different size radius on their lifter bottom than GM does.

Stan

My bad. You are correct Stan.
The lobe taper has a taper across the face and the lifter faces are ground spherically with a crown in the center. Also, when the camshaft and lifters are installed, the lifters are offset by a small amount from the cam lobes.