Originally Posted by oldbogie
The 1.6 rocker opens the valves faster as well as higher. While higher could work to their advantage on the Vortec head, faster just made the overly rampy cam act like it had more ramp. That worked against the compression ratio and burn characteristics of the combustion chamber with the circular dish pistons.
I thought fast ramp rates were better? This is what makes the XE and Voodoo line of cams so good right? And also what makes roller cams better too — fast ramp rates. Can you explain a little more?