Engines are cool. They make noise and lots of power. That's what we're interested in--power. But in order to make that grunt, there are certain things you really should know. For induction and exhaust ...

Find the flaw in the following combination: a '67 Impala running a 327 small-block with stock heads, 8.5:1 compression, a 305-degree-duration cam, a two-barrel carb, stock exhaust manifolds, a ...

If we were to ask for a show of hands, it’s a safe bet to assume many enthusiasts would reluctantly admit that camshaft theory is one of those topics that causes more than a little consternation. You ...

In the interest of preserving hot rodding history, we frequently republish old stories simply for the fun of it, but in cases like this camshaft technical overview from three decades ago (“Choosing ...

Variable-Valve Actuation (VVA) provides improvements in engine efficiency, emissions, and performance by changing the valve lift and timing as a function of engine operating conditions. Two-Step VVA ...