Explore the 4-valve revolution that maximized cylinder head airflow and set a high-revving benchmark that engine builders ...

From Street Stock to Winston Cup, the three most important areas for engine performance improvements are cylinder heads, valvetrains, and intake manifolds. In particular, cylinder heads affect most ...

When it comes to bang for the buck, it's hard to beat a big-block Mopar. The wedge engine (named for its wedge-shaped combustion chamber) is a great combination of torque and horsepower and responds ...

Scientific progress doesn't continue apace without some weird people testing out some weird ideas. In a test from the Project Farm, the hypothesis of whether a 3D-printed cylinder head would work was ...

Modern internal combustion engines are under a lot of stress during normal operation. In particular, there's a lot of tension between the cylinder head and the engine block, especially in diesel ...

General Motors’ LS V8s are beyond commonplace in the car nut universe. People swap them into everything—Porsches included—and while they’re the quickest way to impress on a dyno, they aren’t exactly ...

Inline-sixes tend to have problems tied to their size and length, higher camshaft flex and torsion, uneven air/fuel ...

The five-cylinder engine is uncommon relative to the ubiquitous four-cylinder, six-cylinder, or eight-cylinder variants. As an odd-number engine, it certainly is in a class of just three such engines.