Intake manifold design

[e129745]

Fluid Mechanics and its various sub-disciplines like fluid dynamics along with several of its sub-disciplines like aerodynamics and hydrodynamics is(are) a branch(s) of physics that is considerably complicated. It contains an amazing amount of compromises that complicate the endeavors of even the most financially backed entities. Consider running an engine at a static RPM, load and ambient air temperature. Even then it is very complicated, but now consider dynamic RPM and loads (forget temperature/density variances) and the magnitude of complexity goes up dramatically. Pressure differentials caused by opening/closing valves, piston motion, pressure reversion or reverse pressure waves, turns in the plenum, cross-sectional area, velocity differentials, temperature differentials, kinetic energy differences between fluid (gasoline) and gas (air), surface textures, etc, etc.
I love this stuff, but I have come to understand that limitations are very soon realized when looking for a simple answer to such topics.