DeTomaso Mailing List: February 98, Message #131
     



From: 	John Haas <jrh@bounty.jsc.nasa.gov>

Subject: Re: Manns car

Date: 	Tue, 3 Feb 1998 12:50:03 +0000



You guys have me way confused with this talk of two different kinds of 

pressure.  I never would have thought the manifold gave a damn where the

pressure came from.  Are you referring to the nature of the delivery i.e.

seeing pressure spikes and transients?



john



> 

> A turbos 14 psi can't compare to the 14 psi of a blower.  The turbo 

> air is by flow or velocity, the blower is pumped pressure more like a 

> compressor.  If you read the 14 psi off the manifold your reading the 

> turbos static pressure which won't show you the dynamic pressure 

> that's really there because of the velocity of the air.  They are just not 

> an even comparison.   14 psi in a turbo would compare more to 18-19 

> psi static pressure in a blower.