The only math class I ever did good in was geometry so I can follow along with all the geometric theory part very well but still have a couple questions about the real world.



So is the effect of scrub really more important than valve lift/timing effects on the power/reliability of normal street/strip engines with roller rockers? Seems scrub would not be very important with a roller tip as it would be with a sliding type rocker tip, within reason of course.

Maybe say in a lift limited class where your valve opens to max lift for more than just a degree or two, would you want to set it up so it is perpendicular to the valve at max lift where the ratio is the highest?