Percent of lost lift due to 58 degree lifter angle?
I think the loss plots as a curve. It's not a percentage, it's a function. The higher the lift, and/or the higher the rocker ratio the more loss there is. I usually account for .025-.030 when I'm planning things out but I don't normally expect to use lifts higher than .600, or rocker ratios beyond 1.5.
B3 Would be a better resource for the math...lol.