Has the 848 head ben milled at any time in its history? Has it been cc-ed? I've heard conflicting reports on just what the combustion chamber volume is of an 848 or an 850 head. Once you know the combustion chamber volume, deck clearance, cylinder bore, crankshaft stroke, and head gasket thickness, it is fairly easy to calculate the CR, by hand or with one of the many calculators out on the internet.
