Dan Ina Glandt wrote: "The question is how much smaller would be the combustion chamber be to equal 9.5 to 1 at sea level. He is thinking around 51 cc, but we don't know for sure how to verify this. We realize it is complicated by a number of factors. Any suggestions about this or ideas of where to look or who to ask for the answers would be appreciated."
I can't just give you a number for chamber volume. There are many other factors, large ones being how deep the heads were bored for the 94mm cylinders, head gasket thickness, and deck height, for example. See http://www.n56ml.com/corvair/valvejob.html for excruciating details on how to "cc" combustion chambers to set compression ratio, as well as a spreadsheet to calculate it at http://www.n56ml.com/corvair/cr_3100_ml.xls . If that site doesn't do it for you, see the other incarnations of my engine where I repeated the process with 95hp heads, for example, at http://www.n56ml.com/corvair/95hp/ , http://www.n56ml.com/corvair/phoenix/ , and http://www.n56ml.com/corvair ... Mark Langford ML at N56ML.com website at http://www.N56ML.com --------------------------------------------------------