During one of our never-ending technical discussions, Jim Grubbs at Jim Grubbs Motorsports (JGM) suggested that we take a look at the flow difference between 30- and 45-degree valve seats. While ...

Lie back on a bench set to a 45-degree angle and lift the weights up to shoulder height, palms facing away from you. Breathe out as you press up with both arms. Lock out your arms and squeeze your ...