Combustion chamber shape has a lot to do with how efficiently fuel burns, and whether pre-ignition happens, which is the precursor to detonation. Stovebolt combustion chambers aren't particularly prone to preignition/detonation unless they get heavily carboned up and hot spots develop.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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