Intake manifold flow test. Interesting read!

interesting read, but I don't like constant flow. An engine is disrupted flow. On the intake side, it's a quick, big, gulp of air and stop! On the exhaust side, it's a quick, blast of shoved air in "pulse style" with a slamming door shut (valve). Intakes and heads truly need to be bolted on an engine for the ultimate in accuracy.

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.