Are the engines pre-run on a dyno? Or come with a dyno sheet?
During the design phase, every GM performance engine must pass rigorous dynamometer testing. During these tests, each engine design is run at maximum torque and horse power RPM for up to 50 consecutive hours. The results of these dyno tests can be found in the GM PP catalog for each engine. Once an engine design has passed all of our testing, the design can be put into production. All GM performance crate engines are shipped with all new, never run, parts and are not individually dyno tested.
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