smaller combustion chambers do indeed give higher compression ratio.
you can measure the capacity and calculate the compression ratio. take a measuring device and measure the liquid necessary to fill each combustion chamber with the head upside down and level. if you have flat top pistons that are even with the top of the cylinder it is easy. if the piston tops are not flat it is more tricky. if you have questions i suggest scoping out your facts and reporting back so we can help you sort it out.
good luck
tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.
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