what units are boost gauges measured besides PSI? what's Hg?

reddragons · Post by **reddragons** » Sat Mar 28, 2009 12:29 am

So i got this new boost gauge. hooked it up and everything. well anyway, the units are in Hg so i'm not sure this is what i want.

so i was looking around and i've seen some gauges that are inches Hg and PSI. so what's the deal here?

also it goes up to 10 (in Hg). when i even kind of got on it , it goes wayyy past, up to about 20 or more. so it kinda sucks.

BSOD2600 · Post by **BSOD2600** » Sat Mar 28, 2009 12:50 am

inHg = http://en.wikipedia.org/wiki/InHg

Typically one uses PSI for boost and inHg for vacuum measurements in an engine.

Saskatoon Subaru · Post by **Saskatoon Subaru** » Sat Mar 28, 2009 2:45 am

kilopascal is a unit you can measure boost,

beatersubi · Post by **beatersubi** » Sat Mar 28, 2009 6:28 am

'Bar' is another unit by which pressure is measured. Generally only seen in european cars, though.
Kg/cm is another one commonly used.

reddragons · Post by **reddragons** » Sat Mar 28, 2009 3:06 pm

i guess it wouldn't be so bad except the g auge markings only go up to 10 in HG, so about 5 psi., and after that it's nothing for the rest.

beatersubi · Post by **beatersubi** » Sat Mar 28, 2009 6:09 pm

Is that for positive pressure? Generally in/Hg is only used to measure vacuum.
Better yet, can you post a picture of the gauge?

gijonas · Post by **gijonas** » Sat Mar 28, 2009 10:50 pm

Yeah i think you bought a vacuum gauge lol.

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what units are boost gauges measured besides PSI? what's Hg?

what units are boost gauges measured besides PSI? what's Hg?