How much psi can I push into my motor?

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To help us all help you with this question, we need to know what motor and what mods are done or planned to do for your motor. Then we need to know what turbo you are running or plan on running. Every turbo puts out a different amount of CFM's at the same psi.

In addition, a car which has better flow in general (i/e head port/polish, high flow manifold, throttle body, free exhaust, etc), and more compression will make more power on less psi as well.