ok, i tried to do some research on this topic, but couldn't find the answer im looking for.

i talked to a machine shopping that does port and polish in albquerque, pretty popular.
the guy i talked too seem to know his stuff, he told me that the way he port the intake side of head is a little different than most people. he doesnt leave the intake port to be smooth, but he give it a little roughness texture.

i asked him why and he answered is that help the intake side flow better, he show me a book that said something about rough texture help air flow better than smooth surface.

if someone know what hes talking about please expain it to me. thanks. and should i believe him.

 

Yes that is true, but i do not know the great way to explain the process.

 

When I port heads I always leave the intake side a bit rough, but I've always done so as more of a means to help atomize the fuel better before it reaches the combustion chamber as opposed to increased airflow.

 

check out AIX performance down in albquerque, good guys.

They do installs, swaps, labor, etc