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How fast can I clog a cat?
Posted: Tue Apr 19, 2005 1:51 am
by douglas vincent
If I am running somewhat rich, and about 95 octane all the time due to the extra toluene I throw in, could I either clog a cat, or melt it, withen less than 10k?
Posted: Tue Apr 19, 2005 1:55 am
by skid542
I don't know but I know a nice catless system would solve the problem... sorry, I'll let the experienced ones speak now

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Posted: Tue Apr 19, 2005 2:50 am
by vrg3
Yes, I believe it could. Using higher-octane fuel than necessary tends to result in a less-complete burn, so more hydrocarbons go out the exhaust valves. And of course, running rich also throws more HCs out the exhaust.
The catalytic converter oxidizes these hydrocarbons. This oxidation is an exothermic reaction. So if you make the cat oxidize more than it's supposed to, the excessive heat can kill it prematurely.
Posted: Tue Apr 19, 2005 6:55 pm
by professor
yes no question about it...it can happen faster than that when fueling control is lost
have you seen the converter glowing cherry red ? they can usually withstand that a bit before failing...the media for the catalyst is refractory so can take more heat than steel
if not glowing, then you probably plugged it with carbon crust...the by-product of incomplete combustion