Catalyic converter - JeepForum.com
 
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post #1 of 6 Old 05-28-2012, 08:40 PM Thread Starter
crh86
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Join Date: May 2012
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Catalyic converter

Ok so my question is this. Do you really need a cat on your jeep? I know it's illegal in most areas. Here where I'm at it's not. I don't have emissions. Will the jeep run better with out it or will it suck the gas? I have a 95 wrangler with the 4.0. Im trying to make it breath as best as possible.

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post #2 of 6 Old 05-28-2012, 09:48 PM
25greenwrangler
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1997 TJ Wrangler 
 
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the tj have a o2 sensor in the cat so ya might have to work around that it willrun better and sound better imho and mine has ben without one for 4 years

why buy when you can build?
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post #3 of 6 Old 05-29-2012, 08:41 AM
tjkj2002
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Quote:
Originally Posted by crh86 View Post
Ok so my question is this. Do you really need a cat on your jeep? I know it's illegal in most areas. Here where I'm at it's not. I don't have emissions. Will the jeep run better with out it or will it suck the gas? I have a 95 wrangler with the 4.0. Im trying to make it breath as best as possible.
If your in the US it is 100% illegal to remove the cat(s) regardless if you have emission tests or not.$2500 fine per cat removed if caught.

It will run worse without a functioning cat and use much more gas.Modern cats really do not add any back pressure so that theory of removing them will make the exhaust flow better is false.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #4 of 6 Old 05-29-2012, 09:59 AM Thread Starter
crh86
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Yikes!!! Didn't know it was that much of a fine! My friend removed his awhile back( on a different vehicle) and it sucked the gas. From all my research I understand now that having a cat isn't goin to restrict my flow much. Thanks guys.
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post #5 of 6 Old 05-29-2012, 10:06 PM
flyboy14295
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You're also saving a penguin by leaving it on....

WJ. 4.Slow I6. The Underdog
2" Teraflex BB, 265/70R16 BFGoodrich TA KO's, JKS Adjustable Track Bar, JKS HD Tie Rod, Rusty's Tow Hooks, Block Heater, CB

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I came into this world via broken rubber, i'm not going out the same way.
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post #6 of 6 Old 05-30-2012, 12:50 PM
RogueFab
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No emissions testing means you don't have to replace your cat when it fails. If you intentionally mess with emissions equipment (especially CCs), you can be fined huge amounts (as stated earlier).

Catalytic converters wont affect your fuel economy, they burn hydrocarbons (fuel) downstream of the primary 02 sensor, which your vehicle uses to tell how much unused air is in the exhaust system.

Cats don't have significant performance reducing powers. They resist flow some, and probably limit you by 1-3 HP between 5000 and 6500 RPM. How often will you see that? I did put a 2.5" hi-flow cat on my turbo 6 powered offroad rig, but it revs to 7K. And I would never cut it out. Too easy to see underneath it!
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