Reply to "roller v. flat tappet"

whoa cowboy

one cannot imply the bulk of the difference in visible profile nets more time-at max lift or area under the curve,

The roller cam's contact point is more centered, so a wider lobe is required to get the same lift for a similar cam position.

Similarly, the flat tappet hits the cam with its leading edge and falls of its trailing edge, so a narrower lobe is required.

Not denying the roller is capable of all you said, but I maintain it is not as dramatic as the photo implies.