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Discussion Starter · #1 ·
i am about to order sc (vortec) for my Z and would like input on max boost without having to modify standard
motor etc. Have been told 7psi?
 

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I think it comes with 7psi pulley. Many people are running the 9psi pulley without any problems. The key is proper/safe tuning. I would also suggest an upgraded plenum or plenum spacer to equalize the airflow between cylinders.

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