Cylinder head porting is one of those garage mods that lives somewhere between speed-shop legend and flow-bench science. Also referred to as port and polish, the idea is simple: Open up the intake and ...

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 ...

Problems are both a hot rodder's bane and joy: A bane because there's nothing worse than a last-minute headache preventing you from getting the car rolling down the road; a joy because there's nothing ...

Enthusiasts seem to be divided on just what constitutes a real street motor. On one side, we have the daily driver camp, where “street” is defined as the motor used to power your daily driver, as in ...

Chevy's new bow tie head, left to right: 14011058 cast iron V8, 14011050 aluminum V8, and 14044802 90-degree V6. All share the same intake and exhaust port design philosophy, although there are some ...

ONE of the many problems confronting the engine designer is that of selecting proper port dimensions. As a general rule, it appears desirable to keep the ports as small as possible. This procedure ...