[s-cars] question for those with boost gauges

[Dave Forgie]

Dave:  I am sure that you must know that, in Engineering-speak, the "of
 mercury" is typically silent when discussing vacuum.

Likewise when discussion air pressures and losses in an HVAC system "of water column" is silent when saying the head loss is, say, 5 inches.

;>)

Dave F. Ph.D., P.Eng.

>>> David Kase <davekase at pdqlocks.com> 11/30/06 03:50AM >>>
He does mean "inches of mercury" (unless something is horribly wrong) 
and I think you mean "inches of mercury of vacuum", not "inches of 
vacuum".  There is no such thing as an inch (or pound) of 
vacuum/boost...  :-P

Dave Kase
anal engineer...



Dave Forgie wrote:

>Mike: I think you meant 13 inches of mercury (Hg).  Anyway, at idle it varies. When the car is first started and the rings, etc. haven't fully expanded (with heat), I will get in the order of 10 or 12 inches of vacuum.  When the car is warm, it will be in the 14 to 16 inches of vacuum range.  They only time I get 20 inches of vacuum is when the car has been run hard and then the throttle is closed quickly. 
>
>I have both an AudiMeter Phantom and a Kevin Day TDS-1 digital information system (with digital boost/vacuum) to confirm this data.
>
>YMMV
>
>Dave F. 
>
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