Cat or not to Cat...
#1
Cat or not to Cat...
I'm considering removing my (apparently plugged) cat converter. Don't really want to replace... just straight pipe it. I've heard EVERYTHING from "the computer will compensate and run a little rich"... to ..."it'll run lean and you'll burn your valves up..."
OK experts.... what's the skinny? What's the real answer so I can make a decision.
OK experts.... what's the skinny? What's the real answer so I can make a decision.
#2
Supporting Vendor
iTrader: (33)
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
This is your first post? Don't you think it might be appropriate to describe your vehicle and any mods?
If you like polluting, pull the cat. If you hug trees, get a new one.
Will you blow your junk up w/o a cat? Maybe. Depends on tune/mods.
If you like polluting, pull the cat. If you hug trees, get a new one.
Will you blow your junk up w/o a cat? Maybe. Depends on tune/mods.
#9
Boost Pope
iTrader: (8)
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,339
Total Cats: 6,793
Facts:
1: Removing the catalytic converter (or otherwise decreasing restriction in the exhaust) will very slightly increase VE. In theory, any such improvement in breathing will be reflected as an increase in measurable airflow at the MAF sensor, so there should be no significant change in fuel mixture, either open-loop or closed-loop. (If you were running MAP-based, then you'd be a little lean.)
2: It will cause your ECU to throw a CEL for P042(x).
3: Diet Dr. Pepper does not taste like regular Dr. Pepper.
4: I can believe it's not butter. The consistency is considerably different, especially when not refrigerated.
1: Removing the catalytic converter (or otherwise decreasing restriction in the exhaust) will very slightly increase VE. In theory, any such improvement in breathing will be reflected as an increase in measurable airflow at the MAF sensor, so there should be no significant change in fuel mixture, either open-loop or closed-loop. (If you were running MAP-based, then you'd be a little lean.)
2: It will cause your ECU to throw a CEL for P042(x).
3: Diet Dr. Pepper does not taste like regular Dr. Pepper.
4: I can believe it's not butter. The consistency is considerably different, especially when not refrigerated.
#15
I approve of this point.
Also, it's "Dr Pepper." No period after the Dr. Oddly, Mr Pibb is the same, with the no period thing.
Fun fact for the day.
EDIT: Oh, I guess for relevance I should say that I am running a cat on my 3" exhaust, but the car has never run on it (waiting on parts until the heat death of the universe), so I don't know what difference it makes. You can see directly through a metal core, and it's huge, so I don't see it making any appreciable difference.
Also, it's "Dr Pepper." No period after the Dr. Oddly, Mr Pibb is the same, with the no period thing.
Fun fact for the day.
EDIT: Oh, I guess for relevance I should say that I am running a cat on my 3" exhaust, but the car has never run on it (waiting on parts until the heat death of the universe), so I don't know what difference it makes. You can see directly through a metal core, and it's huge, so I don't see it making any appreciable difference.
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