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Message: <blockquote data-quote="MeanStreak" data-source="post: 65371" data-attributes="member: 350">Operating Parameters:  Valve lift is variable between 0 and 9.7 mm.  Adjustment of the worm gear from one extreme to the other takes 300 milliseconds.  Combined with double-Vanos valve timing technology, the camshaft angle relative to the crankshaft can be adjusted by up to 60°.  The intermediate arm is finished to a tolerance of 0.008 mm.  The cams controlling the eccentric shaft are machined to tolerances of a few hundredths of a millimeter. Additional Benefits: In Valvetronic engines coolant flows across the head, resulting in a temperature reduction of 60%.  The water pump size is cut in half, reducing power consumption by 60%.  The power steering fluid is warmed quickly, reducing the power used by the hydraulic pump.  Mounting the water and power pump on the same shaft and a heat exchanger between coolant and engine oil reduces oil temperature by 30%. The efficiency of Valvetronic engines drop rapidly at over 6,000 rpm since stronger valve springs are required. The stronger springs create higher friction losses.</blockquote>