Thread: Turbo Boost PSI
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      07-17-2011, 05:07 PM   #10
Dackelone
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Drives: 135i Silber mit/Rot 6MT N54
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I don't think your really seeng 17+ psi of boost.

It is possible that BMW's ecu measures in absolute. Meaning zero boost is 1.0bar. 14.5 psi would be 2.0bar. That was the way all German cars read boost pressure back when we had an analog boost gauge (Porsche's & Audi's).