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 ...

Cylinder head porting can take many different levels; in most forms of all-out racing, the porting is among the key considerations of an engine program. This should come as no surprise, since, as pro ...

Porting cylinder heads is a blend of art and science, allowing more fuel and air into an engine's combustion chambers, and more exhaust gasses to exit, for a net increase of power and efficiency. And ...

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 ...

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 ...