You just put your new crate engine together and your adrenaline is pumping. Pump the throttle, turn the key, and… the thing runs like a total dog. It idles fine, but as soon as you step on the ...

In order to perform any interventions on your Toyota VVTi engine’s timing system or cam shafts, you’ll firstly have to put the engine in top dead center position. This is the position when the first ...

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 ...

The hunt for efficient engine valve technology can be a never-ending journey into cam timing, various combustion cycles, and lift and duration adjustments. For that reason, some companies believe ...

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...