OBJECTIVE: Wet flow, pressure excursions, port volume, runner length, plenum volume—all these figure into an engine's overall efficiency. But there's more… Sometimes theory is neat, but sometimes it ...

To celebrate HOT ROD's 75th anniversary, we teamed up with CASTROL GTX to bring you some of the stories that exemplify the core of what HOT ROD is and reflect the brand's influence on America's car ...

Cylinder-head port design and modification has been a source of speculation for as long as there have been internal combustion engines. Because engines are power-making air pumps, airflow volume and ...

When you finally decide that more power is needed for your precious Ford, you'll have to determine whether to add cubes, boost, nitrous, or to make the existing engine more efficient. Any of these ...