w2 rockers ratio

The angle of the lifters and the angle of the pushrods to the rocker is all a bent up Z. You loose lift because it is not a straight shot to the rocker. Thus the correction on the rave blocks to 48*'s.

The 1.6 ratio makes up for it, more or less, because it is lift dependent. The higher the lift, the greater the divide between the old vs. new ratio's.