50 Car Innovations We're Thankful For

Variable Valve Timing

Before VVT, a car's camshaft was optimized for a certain RPM, which, of course, means that it was not optimized for every other RPM. As RPM limits began to get higher, this became more of an issue. So the valve timing was modified to always be in the most optimal position, no matter how high the engine was revving.

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