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 ...
It's a common affliction. Around town, your car runs fine and can fry the tires at will, but at highway cruising speeds above 65 mph, you feel a slight vibration in the seat of your pants and through ...
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