Quote:
Originally Posted by RichP
The N54 doesn't have valvetronic because it doesn't need it (it may or may not handle boost pressure on the intake valves well either), its not related to direct injection.
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Yes you're right. My mistake. Valvetronic is designed to reduce pumping losses. It's suppose to improve volumetric efficiency by optimizing the air charge. Something that forced induction engines don't need. since VE is over 100%.