I've been working with John Andrews of Andrews products off and on for a couple years. He has some great cam design software that makes it possible to create and refine camshaft design. There are several input variables you can plug in to manipulate the profile. In the sample image below you can see: cam lift - green valve lift – light red velocity – dark red accelleration - black jerk – dark blue After a lot of careful study, comparisons and adjustments you get the lift data as below: The JA software offers many features and you can enter valve train details and other requirements. The old Norton cam profiles work great but a little improvement towards perfection helps smooth things out - especially in the ramp jerk area which has improved with modern technology. Its been a long road but its finally paying off.