OK thanks I get it.
Is there a general rule of thumb that can be used to determine net lift based upon maximum flow? I know that there a other factors involved, just looking for a starting point.
I try and get as much lift as the valve gear and cam lobe (solid flat tappet) as I can. For a solid roller I use as much lift as I can get reliably, which with W2/5 stuff is about .770-.800 and you better have your crap wired tight for .800 lift. I said net .650 for Karg because it's a street deal and the springs for much more lift than that get expensive and life starts going down. At .650 net with good springs it should be stone reliable. I wouldn't use less than 260 on the seat, maybe 240 if the spring rate got me to 675ish or a bit more at max lift.