May 2008 was something of a milestone for me as far as the modification of cylinder heads for more performance was concerned. It was 50 years since I performed my first cylinder-head flow test. The technique  I used was crude, to say the least, but it worked. Looking back on it many years later, I […]

Before getting into the subject of physically modifying cylinder heads, let’s look at the history and basic logic and techniques involved with establishing a cylinder head’s number-one criteria: airflow. A working knowledge here allows a better understanding of all the head characteristics we are attempting to improve and how they may each affect the others […]