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 ...
Cam swaps are all the rage and for good reason. Adding an aftermarket cam to an otherwise stock engine can boost output by 40-60 hp (or more) with no other changes (except possibly a valvespring ...
Part 2 Of Our Cylinder Head Roundtable. Our All-Star Cast Of Experts Chime In On The Most Intriguing Aspects Of Cylinder Head Port Design. The intricacies of airflow dynamics through a cylinder head ...
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