Quote: Monte and Al are spot on IMHO, and much more experienced with combos than me for sure. Looking at my latest combo, I chose a 4.15 stroke/4.500 bore over a 4.50 stroke 4.500 bore because I didn't feel I had the head flow to support a 572. I have about 375 cfm head flow at net valve lift in my motor, and it is all done making power at 6900 to 7000 rpm. A 604 motor would need 428 cfm of head flow to equal what I have, and still is hampered by the same size bore as I have, and hoping to push more air through it. IMHO I would go 4.25 stroke 4.500 bore for 540 cubes. It is a great combo, and a local Supergas racer ran this combo in a low deck KB block with B1Mc heads twenty years ago, and was going as fast as anyone I have heard of since with those heads.
I wasn't thinking that Al and Monty were steering me wrong. Everyone who has been kind enough to give me some pearls of wisdom about this monstrosity that I'm trying to put together. I wanted to hear your guys input as well.
Greg
----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable!
