Two major considerations come to mind. First as you increase the ratio, you're going to decrease the strength of the back side of the rocker. This would be a good question to ask the rocker manufacturer. Also, the stock size cam cores have a point where they become flexy and can/will break. Maybe Jones can shed some light on where the limits are for you.
Sean, your comment and others have led me to stay with the ratio the cam is cut for. .510 intakes, 1.7 ratio . 019 lash. Net lift . 848, right at the point Indy said to end up. They actually said . 825 would get it done. Others may have gone to more lift, but the stock diameter bearing cam I have shows lash change on the base circle of . 006 as checked by checking every five degrees around the base circle. I would like to see this at 7500 rpm. I am sure it would be considerably worse.
WES, looking forward for a chance to catch up!
