RomanV wrote:So it seems like a bit of a misnomer to say that smaller runners get better velocity, if you have small runners and large ports, you're most likely going to get less velocity at the port entrance than if you had a runner size which maintains the cross sectional area.
But you're forgetting about the momentum of the air mass that's moving through the runners. If it has greater velocity then it will have more momentum and therefore slow down less when it encounters the larger port
