A normal 45-degree, three-angle valve job employs 30/45/60-degree angles. To compare the flow increases, Super Stock racer and engine builder Bob Lambeck graciously tested the head on his ...

Achieving perfect 30, 45, and 60-degree angles doesn’t have to be difficult – it's all about understanding the geometry behind them. In this video, viewers will uncover four simple yet ...

More specifically, the average time for the first failure was 36 seconds, 33 seconds, 40 seconds, 62 seconds, and 71 seconds for the inclination scenarios of 0°, 15°, 30°, 45°, and 60 ...