Quote:
Originally Posted by asshanson
To rule out boost creep, you could unhook the wastegate flapper so it's open all the time, and see what your max boost at redline is.
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Did you try this yet? If it still creeping that means your not able to vent off enough exhaust fumes through the wastegate exit to keep the compressor from still building boost.
This would eliminate both the mbc as the source and the wastegate.