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 ...

Use of lead free gasoline results in severe exhaust valve recession in light duty engines. Recession proceeds 10-20 times faster than with leaded fuel, and occurs on the integral cylinder head seats.

Motion-control valves solve troublesome equipment-instability problems. • Overcenter, or motion-control valves, are well suited for load holding and control. • Standard overcenter valves can solve the ...

When servicing refrigeration or air conditioning systems that incorporate reciprocating or piston-type compressors, worn compressor rings and/or leaky compressor suction or discharge valves can cause ...