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Turbo boost gauge- specially constructed? V70-XC70 1999

posted by  RoadWorthy on  Fri Sep 3 10:40 CST 2004
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I was wondering if boost gauges were built with a reduced orifice to dampen intake pulses. I'm monitoring boost with a regular gauge for diagnostic purposes and the needle is all over the place, sometimes +/- 5PSI. Is this just normal intake pulses, or is the bypass valve on the intake side of the turbo opening prematurely?

Thanks, Mark






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