info on replacing cats
07-12-2006, 06:15 PM
#1
Racer
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info on replacing cats
I have been looking for affordable high flow cats and found this info:
Please note that aftermarket catalytic converters are not legal for installation in California on OBD II vehicles (some 1994 & 1995, and all 1996 and later vehicles).
Under Federal EPA regulation, replacement of original catalytic converters is allowed only if the original converter(s) is missing, or the vehicle has more than 50,000 miles or is at least five years old and the need for a replacement has been established and documented, or a local inspection program has determined the existing converter is in need of replacement.
I thought that the high flow cats are still legal and that they do just as good of a job clearing emissions but they are also less restrictive. A two in one, hence the hefty price. Are high flow cats illegal? More pollutive than the factory cats?
Please note that aftermarket catalytic converters are not legal for installation in California on OBD II vehicles (some 1994 & 1995, and all 1996 and later vehicles).
Under Federal EPA regulation, replacement of original catalytic converters is allowed only if the original converter(s) is missing, or the vehicle has more than 50,000 miles or is at least five years old and the need for a replacement has been established and documented, or a local inspection program has determined the existing converter is in need of replacement.
I thought that the high flow cats are still legal and that they do just as good of a job clearing emissions but they are also less restrictive. A two in one, hence the hefty price. Are high flow cats illegal? More pollutive than the factory cats?
07-12-2006, 08:40 PM
#2
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If you "accidentally" back over a screwdriver placed with the wrong end pointed at just the right angle and it, again, "accidentally" pokes a hole through your original catalytic converter, I think that would be sufficient to establish a need for new high flow cats. :-) Oh yeah, and sometimes when you are backing into a parking space, you "accidentally" back up at the wrong angle and it dents the crap out of your existing cats thereby making them ineffective and in need of replacement. Oddly enough, it seems that when backing up it dents the cats and sometimes the mufflers too since they're so close but almost always misses the bodywork. Somebody really ought to tell those Porsche engineers about this issue. 
07-13-2006, 02:43 PM
#3
Rennlist Member
As far as damaging those cats keep in mind that the replacement cost per cat is on the order of $1600.00.
If you want to get it to fail emissioins you might be able to just take off one plug wire. You'll have 1/6th of the fuel not being burnt in the cylinders. Please keep in mind that this will also heat the crap out of the cats.
What would happen if you disconnected the O2 sensors? Seems that would give an emissions related fault. There's got to be a way around it.
If you want to get it to fail emissioins you might be able to just take off one plug wire. You'll have 1/6th of the fuel not being burnt in the cylinders. Please keep in mind that this will also heat the crap out of the cats.
What would happen if you disconnected the O2 sensors? Seems that would give an emissions related fault. There's got to be a way around it.
