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Home >> Porsche >> 2007 >> 911 Turbo AWD (997) F6-3.6L Turbo >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Timing Components >> Variable Valve Timing >> Variable Valve Timing Actuator >> Description and Operation

Variable Valve Timing Actuator: Description and Operation



Valve Drive







The new 911 Turbo uses a rotary-vane vane actuator, familiar from the 911 Carrera, for continuous adjustment of the intake camshaft. The adjustment range of the actuator is 40° crank angle.

The small valve lift was increased from 3.0 mm to 3.6 mm in order to make more efficient use of the advantages of VarioCam Plus with continuous camshaft adjustment and a larger adjustment range compared with the 911 Turbo (996) with respect to consumption, output and exhaust emissions. The large valve lift was left at 10.0 mm.

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