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boost gauge...what exactly is it measuring? 850 1997

posted by  someone claiming to be Ray Niblett on  Tue Jan 8 08:44 CST 2002 [RELATED]

The intake manifold sees positive air pressure (created by the
turbo). The air charge is "forced" into the engine (normally
aspirated engines rely on normal air pressure to do this -- air
rushes in to fill the vacuum left in the cylinder). Basically,
your engine breathes more air/fuel and produces more power then
it would if normally aspirated.

I believe 1 bar is 14.4 pounds (14.4 being normal atmospheric
pressure at sea level).

Stock, your engine runs about .7 bar boost. So, if the gage reads
to 1 bar then sounds like it is about right (I have a 70 series
turbo and we don't get the gage so I don't know if it is
calibrated in bars, or not, since I have never seen one up close).

www.tme.com has some good info on turbo volvos.





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