I read that Ferrari uses "3D lobe" cams, that change the valve timing/duration depending on engine speed. It is different from VTEC in that it is not just 2 lobes to chose from, but rather an infinitely variable change that shifts much the same way as VTEC. I read about it
here.
Wouldn't "perfect" valve timing for every speed not only gain power, but also greater efficiency? What kind of applications would it be good for (other than high-performance engines)? Is there some place that custom fabs these for the more affluent engine-modders?
thecheese429 
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