Posts Tagged ‘bmw s65 motor’


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This is a project that many M3POST members have been following for quite some while now. It’s the build process and results for a low compression option for the M3 S65 engine which allows it to run a 10:1 compression ratio (compared to factory 12:1 ratio). And why is that a good thing? The lower compression ratio allows the use of higher boost (via supercharger) safely on pump fuel.