Edelbrock Heads for 318
I suppose I should have said, I dont use stock valves. I use stainless performance valves that are generally more of a nailhead than tulip. They are all back cut, and swirl polished..Which really looks cool, even if it doesnt do much...lol. I dont think a port volume increase on the order of 1-1.5ccs will make any difference when the increase is part of the valve head. But that's just conjecture on my part. I didnt flow test that 360 project, so I cant post numbers on it either. I'd be really interested to see some detailed pictures posted of a 318 sized port that flows 232cfms at 28" thru a 1.78 valve. Especially that 220cfm at .400 lift. Most figures I've seen and heard (only a few guys really bother with these heads) even with iron head specialists cant get much near 200 cfm at max lift. I'm not saying it cant be done. But I know sure I cant do it..lol. Keep in mind, these heads factory form and valve job are generally around 140cfm on a generous bench. I think more guys would use them it was acheivable to get 64% better flow thru the same size valve. That's just more conjecture on my part.