"Boost creep is a condition of rising boost levels past what the predetermined level has been set at. Boost creep is caused by a fully opened Wastegate(s) not being able to flow enough exhaust to bypass the housing via the Wastegate(s) itself.

Is boost creep bad?

A) Boost creep occurs when the wastegate is physically unable to bypass enough exhaust around the turbine on the turbo. Q) Is boost creep harmful? A) Yes, boost creep is one of the worst problems you can have with a turbo engine. Boost creep means that there is NO way for the boost pressure to be controlled.

How do I get rid of boost creep?

Boost Creep is not a condition that can be corrected solely by making tuning changes as it is a mechanical limitation. The two easiest ways to address boost creep are to either port the wastegate housing of the turbocharger in order to allow it to flow more air or to switch to an external wastegate style uppipe.