1.6 rockers with stock 318 cam??

You missed what I was thinking, I think, it is a advertised duration vs. duration @ .050 to help give an idea of rate of lift between the 2 numbers vs. other cams. A quicker rise will lend itself for more power. It should also be know where the cam grinder/factory rates the advertised duration. At what lifter rise do they take measurements from.