Fluid doesnt move just like water, it's a cousin sisters brother... 'close relative' but the fluid/liquid will continue on mostly while the air hangs a left turn..
Exactly. And that’s exactly what the videos I posted show. Those vortices cause fuel separation and that’s bad. And the change in section changes the pressure in the port which does the exact same thing. So doing a gasket match and making a big expansion at the manifold/head will kill power.