[s-cars] Re: vac at idle

[Sean Douglas]

Bob:

So if I read you correctly, than I have a vacuum leak at 13.5 inches of
Hg. Is that correct?
 
Sean
 

 

-----Original Message-----
From: Robert Myers [mailto:robert at s-cars.org] 
Sent: Tuesday, May 17, 2005 6:10 PM
To: Sean Douglas; S-CAR-List at audifans.com
Cc: william.healy at snet.net
Subject: Re: [s-cars] Re: vac at idle




Calculation error, Sean.  420 mmHg = 13.4 inches of Hg not 16.5.
Remember that the Inches of Hg vacuum scale is a negative or inverted
scale where zero inches of Hg corresponds to an absolute pressure of 760
mmHg and 29.92 inches of Hg corresponds to zero mmHg.

29.92 inches of Hg - (420 mmhg/25.4 mm/inch) = 13.4 inches of Hg

William, if you have a vacuum leak it is a quite small one.

At 08:50 PM 5/17/2005, Sean Douglas wrote:



Bill asked:
 
What is a normal vacuum reading at idle.  On my autometer boost/vac
guage I 
consistently get 15 inches of vac. What should I be getting?  I've heard
17 is 
normal.

Bill: I get 420 mm Hg on my Greddy electronic gauge which equates to
16.5 
inches of Hg.

Sean Douglas
1997 S6//RS2


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