Why bother? You don't need to quantify something when you already have imperical numbers (like an ET slip). You take what you got to work with and start to refine it. Do you need to know what the dyno numbers offer? nope! you just need understand what you are working with. And start to improve from there. For example, a buddy owns like an 'H' stock camaro - a bone stock 305" motor, quadrajet, HEI, stock cam, stock intake - it is bone stock! and runs in the 10's.