Manufacturers like to use a lot of acronyms on their cars. Variable valve lift (VVL) and variable valve timing (VVT) are two of the most popular ones. These systems sound pretty similar, but what do ...

Give them the results of a TDC valve-drop static clearance test, and Comp Cam's techs can calculate the piston-to-valve clearance for any of its cams at any degree of rotation. This is especially ...

It's no secret that adding duration and valve lift helps make power. But besides changing camshafts, there is another way to modify valve events-change the rocker-arm ratio. Ford V-8 rocker ratios-at ...

Hyundai recently introduced a new piece of engine tech into its lineup called Continuously Variable Valve Duration (CVVD). Similar to variable valve timing or variable valve lift, it physically alters ...

The camshaft is simply the "brain" of your engine. It decides the personality of your engine by establishing certain traits—like the power band, idle quality, and cylinder pressure—regardless of ...

Cars are Andrew's jam, as is strawberry. After spending years as a regular ol' car fanatic, he started working his way through the echelons of the automotive industry, starting out as social-media ...

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai's new valve tech is able to continuously change the duration of valve openings to suit driving conditions, which Hyundai ...