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Old 12-21-2012, 10:28 PM   #11
Scooby Newbie
Member#: 332873
Join Date: Sep 2012
Location: Ohio
2002 Impreza WRX


I may be wrong but I think those cheap OEM gauges are mechanical boost gauges so I don't think that there is a "sensor" to speak of but a line that comes from the engine bay carrying the pressure that we want to monitor. I don't know exactly how a mechanical boost gauge works but I'm guessing said pressure deflects a spring mechanism of some type and the needle moves. But I imagine the same logic applies to it as well, that orientation doesn't matter, perhaps it was a stupid question to ask. Thanks for the response though!
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