Intake manifold flow test. Interesting read!

That is why there is two different lengths for the cross ram, low rpm and higher rpm. tuning the intake runner length for the pulse for either high or low rpm.
tried that thought, had hell of time getting engine set on flow bench. couldn't hook up the bench to intake. gave up on it!! constant flow gives you a measurement of flow. it's accurate. superflow, has a article about that.