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 ...

Federal-Mogul’s “lean tool steel” contains a higher proportion of chromium than standard tool steels, cost-effectively adding carbides that create a multiple-phase composite microstructure. Valve seat ...

Major and minor valve seat diameters are most easily checked for consistency with a pair of dividers during seat grinding operation. This assures proper seat width. The answer to the question posed by ...

As with most things in life, it’s the details that make the difference. You might not think that a measly degree here or there could make more horsepower when it comes to a valve job, but there’s ...