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- Newsgroups: bc.general,ubc.general
- Path: sparky!uunet!utcsri!cs.ubc.ca!fs1.ee.ubc.ca!jmorriso
- From: jmorriso@ee.ubc.ca (John Paul Morrison)
- Subject: Re: Air Care, emmissions testing
- Message-ID: <1992Nov6.214257.4807@ee.ubc.ca>
- Organization: University of BC, Electrical Engineering
- References: <1992Nov6.074506.1141@ee.ubc.ca> <1deagtINNdq6@iskut.ucs.ubc.ca> <1992Nov6.185517.25840@mprgate.mpr.ca>
- Distribution: bc
- Date: Fri, 6 Nov 1992 21:42:57 GMT
- Lines: 38
-
- 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 |
- ________________________________________|_________________________________
-