We thought it might be a good idea to do a quick drive-by, highlighting the advantages of VVT in the Gen IV and V engines. What we will reveal is how well it works and why it’s best to take ...

How to delete active fuel management for high-performance LS engine applications, and is variable valve timing help or hurt performance?

Harley-Davidson has filed a patent application for a variable valve timing (VVT) V-twin engine, possibly for the Sportster to improve economy and emissions.

All these engines are GDI and the V-8s are loaded with AFM and VVT. The 5.3-liter makes 355 SAE horsepower while the truck 6.2-liter is rated at 420 hp with 450 lb-ft of torque.

Indian Motorcycle is not only building a new engine, but also seems to be updating its current Thunderstroke 111 with variable valve timing or VVT.