Originally Posted by
tayto
if you want to invest the time go for it but I don't think the gains will be as significant as one might think. usually you leave the floor of the runner alone unless you are changing the shape of the runner which is fairly advanced head porting. pull a set if valves out and check how it transitions from the valve seat to the runner. a lot of stock stuff has a ledge here. grinding and smoothing this transition and you will see much higher gains here than port matching.
if you want to get a gasket that is a better match for the port try a felpro 1255. i also have a borescope that i stick down the runners before tightening the intake down. this will allow you to "split the difference" and centre the port as best as possible to the port in the cylinder head. the vortec intake has almost 1/8" of play it can move front to back before tightening down!
Bookmarks