How fast can I clog a cat?

Headers, cats, uppipes, downpipes, midpipes and mufflers.

Moderators: Helpinators, Moderators

Post Reply
douglas vincent
Knowledgeable
Knowledgeable
Posts: 3336
Joined: Sun Apr 27, 2003 5:50 am
Location: OR, Portland
Contact:

How fast can I clog a cat?

Post 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?
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
skid542
Fifth Gear
Posts: 2857
Joined: Fri Dec 26, 2003 6:37 am
Location: North Idaho

Post 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 :).
Lee

93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
vrg3
Vikash
Posts: 12517
Joined: Sun Nov 03, 2002 2:13 am
Location: USA, OH, Cleveland (sometimes visiting DC though)
Contact:

Post 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.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
professor
Third Gear
Posts: 832
Joined: Tue Jul 27, 2004 6:12 pm
Location: Providence RI

Post 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
That beer you are drinking cost more than my car
Post Reply