My on this is that the motor is stupid, it doesn't know what the cam lift or durtation is, it does know how long and how far open the valves If you change the rocker ratio only(don't touch or change the cam) the motor will see the changes in valve action, it wlll make more or less power depending on which way the ratios are changed. I have seen this at the valves when changing ratio, try it sometimes I set the lash at zero and measure from .001 begining opening to .001 before closing, take your time and write the results down,net duration and net lift Change the rockers to a different ratio and do it again Don't be suprised if there is a vareince in results on the same set of rockers