Interesting cam grind

[Bob Johnson]

I have a camshaft that I removed from an engine that was too bad to rebuild. This camshaft has a grind that is so severe that there was 0.030" removed from the side opposite the lobe. Below is a picture of the camshaft. I wondered what the lift profile would be for this camshaft, It appeared to have a very high lift. So I thought it would have a short duration. I have included a graph which shows the lift profile for a stock B camshaft and the profile for this re-ground camshaft. It has a little better lift than the B and the duration is same except for just at the beginning and end. Note that the area under the curve is a good representation of the "performance" of the camshaft. I would say that this re-ground camshaft would perform similar to a new B camshaft. It looks like it has both the lift and duration of a stock B camshaft. The only issues this camshaft would have is that all of the hardening has be removed and the points on the lobes are very sharp. This could result in a camshaft that would wear very fast.

Bob