Quote Originally Posted by jerry clayton View Post
a much more critical rate of camshaft effects are the DECELERATION rates as the tappet nears the full open and also the closed area---one to elininate the valve from flying off rocker/pushrod/lifter combined diminsions and the other to eliminate bounce as the valve seats.
Thanks Jerry, I never addressed the other side of the lobe, just interested in making the point that an extreme energy grind will work the lobe and lifter harder than a gentler grind and is not particularly necessary on a street motor in today's world in my opinion.

If nobody brings up the downside of a more radical lobe profile, these youngsters are going to think it's a free lunch.