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*To*: lmulieri@zoo.uvm.edu*Subject*: Re: Turbo question*From*: QSHIPQ@aol.com*Date*: Wed, 14 May 1997 09:17:55 -0400 (EDT)*cc*: quattro@coimbra.ans.net*Sender*: owner-quattro@coimbra.ans.net

In a message dated 97-05-14 08:37:46 EDT, you write: << I have a question about boost. I think bar is a unit of measure and is equal to one atmosphere. If this is true does that mean that 0.4 bar would be a vacuum at sea level where you would have one atmosphere or do I have some thing wrong. TIA Berthann, using husbands email account--with his permission 1988 5000CSTQ Pear white >> If you turn the ignition to on (no start - sea level assumption here), you should get either .9 or 1.0 depending on the accuracy of your Pressure Transducer. .3 or .4 should be your idle vacuum at sea level. So yes, your post is correct as written. 1 bar refers to 14.5psi (1 atmosphere = 30.0" Hg) at sea level. 1.4 bar would be absolute boost or (.4 X 14.5psi = 5.8psi boost) .4 bar pressure above atmosphere. Audis are altitude correcting in their turbo applications, so you will get the same power output at sea level or 10,000 feet. HTH Scott

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