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Old 03-31-2021, 03:19 PM
Clavurion Clavurion is offline
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Join Date: Jan 2013
Location: Finland
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On diesel there is no throttle valve so no vacuum like on petrol engines when throttle is closed. Pre-facelift M57 engine max boost is 1,15 bar with factory map, usually 1,25 bar when mapped. Facelift M57N ~1,4 bar and with map upto 2 bar. EGR valve housing the usual place for metering hose. (Though in my honest opinion installing a boost gauge is total nonsense.)
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