Annnnd you totally dissed BMW's Valvetronic and some others Variable Valve Lift (VVL) systems which change the displacement of the engine by varying the intake valve to close before BDC on the suck stroke. In fact they keep the throttle plate wide open on those engines using the valves to "Throttle" the engine. It'd be somewhat difficult to retrofit your Geo Metro engines with it. Just sayin. Although I bet that magnificent b@st@rd MPGeo could pull it off....that guys a frickin genius.
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