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Old 09-09-2010, 10:10 PM   #1
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So is it a good idea to remove Catalytic Converter

So my 87 has some cheap looking exhaust and im wanting to redo it but im thinking about not putting a cat back on it. What if any are the pros/cons I know its against the law but not really worried about that. Thanks

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Old 09-09-2010, 10:55 PM   #2
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If you remove the CAT, you wont make emissions tests in many States. That means you'll have a "Trail Only" Jeep and it wont be "Street Legal." (Three Day Trail Passes, Etc.)

You'll have to tow your Jeep on a trailer after the CAT removal because you might be ticketed by the State Patrol.

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Old 09-09-2010, 11:10 PM   #3
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As stated above, the CAT is required for on highway use for pretty much all vehicles. The fact you posted in a public forum that you are aware it is illegal, you are giving ammunition to the anti-off road crowd to place more restrictions on our hobby. I am not trying to be a mother hen, but we need to be cautious of what is posted and how others may read into it.

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Old 09-09-2010, 11:38 PM   #4
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turdhurdler:
"Lighten Up, Francis."

I posted facts. I didn't encourage breaking the law.
We have Jeep Clubs here in the North as well turdhurdler.
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Old 09-09-2010, 11:48 PM   #5
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If you live in an area that has emmsions testing then you have to have a cat, otherwise its up to you. If was doing a new exahaust I would put the cat on, but I have to go have emmsions testing, sucks but keeps alot of beaters of the road.
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Old 09-10-2010, 12:51 AM   #6
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Quote:
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turdhurdler:
"Lighten Up, Francis."

I posted facts. I didn't encourage breaking the law.
We have Jeep Clubs here in the North as well turdhurdler.
Haha, funny. I like the movie Stripes also. But I never stated that you did encourage law breaking. Nor did I state anything about a Jeep club.

Jeff
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Old 09-10-2010, 01:13 AM   #7
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Who are these people who hate 4x4ing? Isnt it a bit childish to go after us? guess everyones gotta have a scapegoat

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Old 09-10-2010, 04:21 AM   #8
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Haha, funny. I like the movie Stripes also. But I never stated that you did encourage law breaking. Nor did I state anything about a Jeep club.

Jeff
Hey I think you need to state that in a form of a question some how or include the word bacon. Oh and um I have no clue what the other dude was talking about either.. carry on..

as for the cat. its cheap and easy to replace install it and be done.
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Old 09-10-2010, 04:36 AM   #9
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You really like bacon, don't you?
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Old 09-10-2010, 07:51 AM   #10
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Quote:
Originally Posted by bck4more View Post
So my 87 has some cheap looking exhaust and im wanting to redo it but im thinking about not putting a cat back on it. What if any are the pros/cons I know its against the law but not really worried about that. Thanks
ok, well, in an effort to actually answer your original question.......i took the cat off my cj when i had it and it did not effect performance at all and the check engine light never came on. i also plan on removing the cat on my 92 when i redo the exhaust on it and see if it makes any difference or not. so take that for what it is worth.....
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Old 09-10-2010, 09:56 AM   #11
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Bacon??? Its whats for breakfast or lunch or dinner or midnight snack... mmmm bacon?

Jeff
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Old 09-10-2010, 10:07 AM   #12
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Ok, since removing the CAT effectively makes your vehicle unlawful in most (if not all) states, and there is really no benefit performance wise, keep it on.

If for NO OTHER REASON than the CAT is there to help clean the exhaust that comes from your vehicle. Every little bit that we do to keep the world a cleaner place benefits not only us, but future generations as well.

That and it gets hot enough, if you're desperate, you might be able to cook bacon on it :shrug:
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Old 09-10-2010, 02:14 PM   #13
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I took the cat off my 95 and it sounded better, has more power, better milage, and the check engine light has not came on anymore. If the state you live in does not call for it, it is up to you. Next time you get in-between two semi's, see whos putting out the most smog.
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Old 09-10-2010, 02:24 PM   #14
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Personally I'm all for more power gas mileage and a loud but good sounding exhaust. But we need to compromise here because we do have to do what we can to keep whats left of nature clean and unpolluted. So my solution would be a high-flow CAT. You'd also be legal too.
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Old 09-10-2010, 02:31 PM   #15
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The few people that dont run CAT's arent going to do anything major or minor really to the ozone or any of that. The people that dont run a CAT is a very very small percentage of people. I have mine still, but on the 20 year old truck thats race ready I run no cat, as CAT's restrict alot of airflow. Well exhaust. But for a Jeep, I'd keep it. Its not a hot rod.
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Old 09-10-2010, 02:34 PM   #16
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Personally I'm all for more power gas mileage and a loud but good sounding exhaust. But we need to compromise here because we do have to do what we can to keep whats left of nature clean and unpolluted. So my solution would be a high-flow CAT. You'd also be legal too.
EXCELLENT solution!
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Old 09-10-2010, 02:40 PM   #17
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I'm not a cat person..........


but a high-flow cat...sure
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Old 09-10-2010, 02:40 PM   #18
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EXCELLENT solution!
I actually plan on running one from mangnaflow when I do my V8 conversion. At 80 bucks its not that bad of an idea. Its all about compromising to come to a good solution.
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Old 09-10-2010, 03:20 PM   #19
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The few people that dont run CAT's arent going to do anything major or minor really to the ozone or any of that. The people that dont run a CAT is a very very small percentage of people. I have mine still, but on the 20 year old truck thats race ready I run no cat, as CAT's restrict alot of airflow. Well exhaust. But for a Jeep, I'd keep it. Its not a hot rod.
Kind of, granted the small amount of people who run cat free dont impact the environment severely, however its all the things that add up. I'm no hippie but cats turn CO into Co2 and other non toxic gases, its a great solution and compromise to running open vs. much more restrictive emissions such as in the EU, California, and massachusetts etc...

Bottom line you should run a cat, but you have a point, how toxic are lawnmowers? answer: much more so than cars could ever be
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Old 09-10-2010, 03:21 PM   #20
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At 80 bucks its not that bad of an idea. Its all about compromising to come to a good solution.
Couldnt have said it better
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Old 09-10-2010, 03:31 PM   #21
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I considered taking my rear CAT off just because it would keep the poor lil guy from sounding like he was running on methane! Decided against it but never even considered a high flow CAT.

Maybe, someday in the future, after I get skids and MetalCloaks and....
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Old 09-10-2010, 03:37 PM   #22
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how about bacon wrapped cat? or would that be considered in humane?
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Old 09-10-2010, 03:52 PM   #23
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how about bacon wrapped cat? or would that be considered in humane?
What you do is get a high flow CAT then put the bacon on in the inside of it in a manner where it wont blow out that way you have some yummy and clean smelling exhaust
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Old 09-10-2010, 04:06 PM   #24
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ha ha thats funny too
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Old 09-11-2010, 08:26 AM   #25
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I live in Ohio where they did away with emissions testing (when they did do emmisions testing you could fail at one drive 10 min up the road to another one and pass) I removed the CAT and stuck it on a shelf incase they reinstate it. But I get more HP, better mileage, and choke more pigeons.
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Old 09-11-2010, 09:40 AM   #26
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Whether your state checks for them or not, FEDERAL LAW requires that any vehicle that will be used on public roads must have a catalytic converter installed if it originally came equipped with one. The fines are pretty steep if you get caught without one.
Put a high flow unit on there (I like Magnaflow) and keep it legal, there's no good reason not to.
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Old 09-11-2010, 11:02 AM   #27
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I live in Ohio where they did away with emissions testing (when they did do emmisions testing you could fail at one drive 10 min up the road to another one and pass) I removed the CAT and stuck it on a shelf incase they reinstate it. But I get more HP, better mileage, and choke more pigeons.
Exactly how much more horse power did you gain as documented by a dyno?

Cats don't cause much restriction at all, be responsible and keep it on.
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Old 09-11-2010, 06:28 PM   #28
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Please, cow farts and volcanic eruptions worldwide put out more methane/greenhouse gases than our vehicles ever could. Facts are much better than the skewed political agenda.
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Old 09-11-2010, 06:31 PM   #29
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But on that note it is the law and I would just leave it on...
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Old 12-03-2010, 08:55 PM   #30
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Al Gore is having a cardiac reading this.

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