RE: Clogged cat?

[c a l i b a n <caliban@sharon.net>]

	how to fix your clogget cat:

	http://www.cloudfactory.org/febo/squashwetcomp.jpg

	sorry, i had to.

On Mon, 1 Feb 1999, Buchholz, Steven wrote:

]> > I have to affirm Ti's experience: I have had the cat on/cat off with
]> several
]> > cars to no noticable effect on power. 
]> 
]> Yah, me three.  I just removed an intact cat and swapped in a sleeved
]> one and relaly noticed nothing at all.  Same sound, same power, or at
]> 
]While I too tend to prefer the cat installed ... it is the law after all
]where I live ... to those of you who have run your engines with and without
]the kitty have you sniffed the exhaust of the fully warmed up engine in each
]configuration?  What you'll find is that the exhaust smells pretty clean
]even w/o the cat ... especially as compared to the exhaust of the lightly
]controlled emissions vehicles others have mentioned.  For the engine to be
]able to run without burning up a cat the emissions has to be pretty good to
]start with ... IMO the major benefit of the requirement of a cat.  
]
]How many times have we seen posts of people who are able to get their car to
]pass California emissions w/o a cat?  I know when I bought the QTC I assumed
]it had one, but I didn't know for sure one way or another ... but when I
]took it in to get smogged the first time the service adviser told me that
]they were able to get the car to pass, but they tested the emissions at the
]CO Tap Tube and they were the same as at the tailpipe and so they suspected
]that the cat was hollowed (which I later confirmed).  
]
]There are downsides to the cat as well ... the cat tends to produce SO2 ...
]which when combined with the pools of liquid water in a cold exhaust system
]creates sulfuric acid.  Wonder why you're seeing so many cars with SS
]exhaust systems nowadays?  It is because they can tend to eat themselves
]from the inside out.  I am also concerned about what happens when SO2 in the
]air happens to come in contact with water in biological situations ...
]
]Don't get me wrong ... I appreciate the improvements in air quality that
]have come about as a result of more tightly controlling vehicle emissions
](as well as vapor recover nozzles on fuel pumps and smoking bans in
]restaurants and public businesses for that matter) ... but I just wanted to
]flip the coin over and remind all that it ain't just that mystical catalytic
]converter that is giving us that clean air ...
]
]... and to Huw ... don't just run out and find an old cat on an old car to
]fill your needs ... it turns out that new catalytic converters in standard
]form factors can be found at quite reasonable prices ... and provide less of
]a flow restriction than an old cat removed from a wrecked car ...
]
]Steve Buchholz
]San Jose, CA (USA)
]


--
 rocky mullin
 http://caliban.sf.ca.us/
 two strokes are faster than four!
 this message was composed using the vi editor.
 '83 ur-q - yamaha rz350 - suzuki ts250 -  chaotic good