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Do the electronic motors in the heads completely control the valves or is it just to control the variable lift and ect...? I guess what I asking is, does the 370z still use tradittional chain driven camshafts?
 

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Yes, it uses 4 camshafts. The variable cam gears just adjust the duration and overlap.
 

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I don't think there are too many companies that have managed to productionize a piston engine without a camshaft yet.

There are pneumatic valves being experimented with, but they're not ready for prime time yet.
 
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