Quote:
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Valvetronic will not be coupled to BMW's N53, "High Precision Injection" (gasoline direct injection) technology due to lack of room in the cylinder head, or the N54B30 bi-turbo engine.
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http://en.wikipedia.org/wiki/VANOS
http://www.bmwworld.com/technology/vanos.htm
http://en.wikipedia.org/wiki/Valvetronic
http://www.bmwworld.com/technology/valvetronic.htm
anyway, very usefull infos here:
http://www.bmwworld.com/technology/index.htm