Does this prove David Vizard's 128 lsa formula ?

Mean416 said
I'm sure it's a valid formula, in application, and certainly better than just guessing. I'd use it in a heartbeat to select a cam. I certainly don't have anything better to use and I wont purchase several cams in the pursuit of perfection. I think for most guys we just need it to be as close to "right" as possible, out of the gate. We're not gonna be swapping around a bunch of cams to test. So in that way, it probably works well.

I'm not saying that there's zero merit to it, I'd probably at least see what the formula say when shopping for cams.

Mean416 said
All that said. I think it's far more a correlation, than a real explanation of some underlying principles at work.

This is what I'm thinking.

The point I was trying to make in the dudes video the dyno examples he gives as proof to me doesn't accomplish that, each dyno test basically shows that every few degrees you go narrower you gain a reasonable amount of torque even as you go pass DV's recommendation you still gain.