Originally posted by erik erikson
I think I understand why everyone is saying run the 200 cc heads.When I buy a set of heads I order them bare.At the vary least I will do a bowl blend, some work around the valve guide area, a gasket match blended at least 1 inch into the port.The whole idea is to have a smaller port volume with higher flow numbers.Most of the time when I do the port work on the 180 cc head they end up in the 185 to 188 area.
Eric, I have a problem with this because it is a well know fact that if you port on aftermarket heads without a flow bench, you can hurt flow more than help if you're not careful. I clean up the ports a little bit where the casting flash meets the machine work. I would never recommend someone port heads without experience. Most people want to bolt-on and go, which is the best advice over home porting. Therefore, choosing a head with "out the box" performance to meet your goals is best thing.