Engineering Explained on MSN

Variable valve lift vs variable valve timing - VVL vs VVT

What is VVL? What is VVT? How does VVL/VVT work? What is variable valve lift? What is variable valve timing? We're going to ...
Hot Rod

Variable Valve Timing For Circle Track Engines

In order to set a stage for what follows, let's first revisit some of the fundamentals involved in how valve timing relates to power output. And to further clarify how "power" is defined in the ...
Road & Track

How Variable Valve Timing Works, And How it Makes Your Engine Better

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 ...
Motor Authority

Here are the differences between Variable Valve Lift and Variable Valve Timing

Engines are complex bits of machinery. At their core level, yes, it's easy to understand what is happening. Air and fuel enter the engine where they are ignited and combustion occurs resulting in ...
Hot Rod

What Is VVT and Should It Be Disabled?

Since the beginning of hot rodding, gearheads have endeavored to increase the performance of internal combustion engines through the optimization of valve timing. It's been proven time after time that ...