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Tyree Smith of Ty Tech Racing Engines works the keys on the laptop. We'd like to say he is surfing chevyhiperformance.com but he's really customizing the timing curve in a customer's MSD 7531 Digital 7 ignition system. He's pulled a few degrees of timing away to help the car hook better. It is one of many tools racers rely on to go low 8s in Xtreme Street trim.