Attempting to "read between the lines", maybe this is what they're talking about:
440 source offers only one dish volume-24cc. If that doesn't work for you, then you'll be milling heads or buying new heads to arrive at the target CR. Maybe the real question is, should it be left alone at 9.7:1 or will it be worth it to mill the heads to 75cc and arrive at 10.6:1? Was that really the question?
Yes, that is what I would like to know. After looking at the 440 Source chart, I think I misstated what I was told. I believe what he said was using the 84 cc heads with flat tops was going to result in a comp ratio too high to run well on pump gas and using dish pistons with the heads milled down to 72-75 cc's would give the desired comp ratio. I believe he said the cc's would have to be in the low 90's in order to use flat tops to get the desired comp ratio. This is all Greek to me but given this information, is there any reason that flat top pistons would be preferred over dish? Thanks.
