How VTEC works and why it's more than just a marketing term. ZTEC, Variable Valve Timing and Lift Electronic Control, is Honda's system that uses two camshaft profiles in one engine. At low RPMs, the engine runs on a conservative cam profile for fuel efficiency and torque. Once the ECU detects high RPM and load, it activates a locking pin in the rocker arms, switching to a more aggressive cam lobe with higher lift and longer duration. This allows more air and fuel into the combustion chamber, in

Honda just put VTEC in an EV. It showed off a prototype engine and drivetrain simulation that vibrates, sounds, and shifts like an S2000, a Civic Type R, or either NSX. At high "RPMs," it also simulates the increased valve lift of VTEC. This tech could make it to the company's upcoming 0 Series EVs. Which simulated car would you want to try? | InsideEVs

A Simple Explanation for the VTEC Engine! | Engineering Explained