Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

When it comes to upgrading small-block engines, camshafts are a popular choice for enhancing performance. Different camshaft types can significantly alter how an engine breathes and performs, offering ...

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 ...

When it comes to modern internal combustion engines, there are two types that dominate the industry: pushrod and overhead camshaft (OHC). While pushrod engines were the stars of the show for many ...

With diesel fuel prices at an all-time high, we've been testing various products in an effort to find ways to increase the efficiency of the diesel engine. Our hope is to find results that will offer ...

It's appropriate, we think, that a camshaft has lobes, since this relatively simple device is so often called the brains of an engine. And indeed, a camshaft does direct several engine functions in a ...