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Old 09-26-2018, 01:26 PM   #3
Fred E
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It's rather unlikely that anyone traded in a supercharged car with a built engine without first swapping the engine out for a stock one. However, the 2.87" pulley is quite smaller than the original pulley and spins the blower to over 12 psi, so I'd be concerned about the extra wear by the high boost level on a stock engine.

A built engine would also be considerably noisier, especially during a cold start, due to the piston slap. If you can record the sound of a cold start, it should be fairly easy to tell if the engine has forged pistons.
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