🚀 go-pugleaf

In article <1992Nov6.185517.25840@mprgate.mpr.ca> vanderby@mprgate.mpr.ca (David Vanderbyl) writes:
>Actually, there is no corelation between engine size and allowable
>emissions in the air care tests.  This is because the measurements
>are ppm and %, the total volume of pollutants is irrelevant.
>
>(This, incidentally, is why a hole in your muffler cannot help
> you pass emissions testing.)

Depending on the shape of the hole, and its position, the exhaust gases
could easily, and conceivably create a vacuum, and suck in more air into
the hole, thus diluting the exhaust.

  =========================================== 

   exhaust -------------------------->  

 ==================    ======================
                 / ^ / 
       -----------/

Air flows IN instead of out, as you  might assume.

The gas is moving at  a high velocity, and is therefore at a lower pressure,
which will suck in air.


>
>Dave.
>


-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
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