How much is too much

[Tom Wesenberg]

Originally Posted by Dick Steinkamp

Yea, I said that wrong. The total cam height would be the same (nose to heal). You would still have the same lift, the same duration, the same cam profile. The lobe heal is just closer to the cam shaft base circle which would make the valve clearances greater. This is usually easily made up with adjustable lifters/rockers.

I think it was Marco who posted a good overlay picture showing how you can't grind an original cam and have it spec out the same. Anyway he did a good post showing why it can't be done, but I don't have time to find it now.