In general, I suppose you are on the right track, but the ramp is just one of many tunable parts and and you probably cant put to much merit into just the ramp profile. If the ramp starts off high and looks like the roller is gonna fall off a cliff , like a 280 ramp it will give you a wicked primary upshift, which for drag racing is normally a good thing, .....however, theres sooo many combinations of helixes which upshift the secondary at different rates, and sooo many primary springs that can slow or speed up the way your roller rides on the ramp, you can actually have say a 286 ramp with the right (heavy) pin weight, and a lighter primary spring , and probably acheive similar results as say a 280 set up.In other words theres a whole ton of variables that you can all flip flop around and get similar results. Now that your probably totally twisted, happy testing.