CNC Mill Mark Removal in Intake Port

So with multi port fuel injection and the injector just above the valve… there is no time for fuel atomization at high rpm. And anyone who wants to tell me the length of the runner and head port is enough at 4,000rpm to “mix” and properly atomize fuel and air… I don’t buy it. Will rough runners help? maybe, but explain sheet metal intakes? Manufactures trying to get more fuel miles from a gallon of gasoline do not polish or touch intakes - at all. If there were value they would.

SN: great work by Early A. I appreciate the energy.