| My guesses: -It would burn oil like crazy, like the current Wenkel rotary engine. You would need to lubricate the cam shaft lobes and that oil would make it's way into the intake manifold, combustion chamber, and exhaust manifold. -The likelihood of exhaust gases making it's way back inside the combustion chamber. -The loss in velocity of the intake air into the combustion chamber. -The inability to control valve timing, duration, and lift.
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