One Thing we've discovered about the OHC modular motors is that they are highly sensitive to cam timing. Unfortunately, the production tolerances are such that the cam timing can be off significantly ...

A cam phaser is a sprocket which adjusts the position of an engine’s camshaft in relation to its crankshaft and is tuned with a computer-controlled servo. Camshafts control the timing of engine intake ...

Most modern variable valve-timing (VVT) systems use a cam phaser that rotates the position of each cam­shaft relative to the timing chain. Think of making a record turntable go faster or slower by ...

Upgrading your engine from a flat-tappet valvetrain to roller comes with a lot of advantages—mainly more power and radically reducing the chances of wiping a camshaft lobe—but it also requires a few ...

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 ...