It's also used for testing component compatibility, designing springs, cam lobes, etc.

They usually(never?) don't even have any kind of rotating assy in the bottom end, much less an induction system.
I guess my point is......even some of the bigger names in the industry use the Spintron to figure out what's really going on with the valvetrain........and the Spintron has no provision for creating the combustion pressures and shock wave tuning inside the manifold.......so it's unlikely those things have a big impact on the results.

Another way to look at it is........if you're having a valvetrain stability issue.......I highly doubt it's the combustion pressures or the tuning pulses inside the manifold that are the cause of the problems.


Again - ^^^ this.