I didn't know this till today and I must say I am surprised.
http://www.porsche.com/usa/aboutporsche/po...y/variocamplus/
This is the Variocam plus variable valve lift technology used in Porsche engines. Its actually the same system use by by Proton in their Campro CPS engines and its licensed to Porsche. Of course, they say its actually developed by Lotus......
http://gen2clubbrunei.blogspot.com/2008/12...2-cps-iafm.html
Look at the intake cam profile and compare it with Variocam plus. They are essentially the same. Both systems also use flat tappets with a locking pin to change the cams.
Of course, the Proton engine does not have continous VVT implemented, only fixed VVT and VVL similar to MIVEC and early VTEC systems.
Video of Variocam plus
http://www.youtube.com/watch?v=fwWp5TLGMVk
Video of Campro CPS
http://www.youtube.com/watch?v=Fjn6bdvYdKw