Originally Posted by InfiniteDice
haha... yes I talked myself backwards there, what I meant was,
BIGGEST --------------- Smallest
We're not talking a wall here, more like a very small .5 - 1mm lip.
That way the flow steps out to the larger area... when/if you get back flow it will hit the lip but that's not important.
That makes more sense
That's what I did as well, except I left the port diameter in the head about 2mm smaller all the way around to account for the ability of the exhaust gasket to shift. I don't want any overlapping of the gasket and the port in the head.