Removing catalytic converter - Dodge Durango Forum
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post #1 of 30 Old 11-24-2008, 01:21 AM Thread Starter
YO MUDA
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Removing catalytic converter

Im new to this later model mods. Ive seen where some guys remove their converters. We dont have smog inspections in okieland, how can you remove the cat. Mine has a sensor located behind the cat.

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post #2 of 30 Old 11-24-2008, 01:22 AM
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ziptie the sensor to the frame so it will read fresh air and your good to go, just cut out the cat and put a straight pipe or whatever in there and weld it up.

10" round k&n, flow 40 dumped, 3/4 drop
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post #3 of 30 Old 11-24-2008, 01:57 AM Thread Starter
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Thank you brutha

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post #4 of 30 Old 11-24-2008, 10:04 PM
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just make sure its the post-cat sensor you zip-tie to the frame and not the front and no problem

10" round k&n, flow 40 dumped, 3/4 drop
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post #5 of 30 Old 11-24-2008, 10:17 PM Thread Starter
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Gotcha.

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post #6 of 30 Old 11-24-2008, 10:39 PM
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The guy who installed my headers left out the front O2 and I thought he was talking about the back ones like I had instructed him too.

Well my truck ran rich as heck and sounded like a cam. It took a few "turn off" cycles before the code popped up and I checked the front sensor to see it was floppin in the wind...

Stretched enough wire out of the loom to get it plugged in until my extension showed up. It went back to normal after that though. lol

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post #7 of 30 Old 11-24-2008, 11:14 PM
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why do you want to pull the cat? they really don't hurt performance as long as they are working right. This though of pulling the cat makes a difference started back when cats were new and didn't flow well, a modern cat isn't going to hurt power on a stock engine unless it's clogged up.

360 NV3500 needing to get back to the track last best 14.15 @96.5 with the 318
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post #8 of 30 Old 11-25-2008, 12:14 AM Thread Starter
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Quote:
Originally Posted by plum95 View Post
why do you want to pull the cat? they really don't hurt performance as long as they are working right. This though of pulling the cat makes a difference started back when cats were new and didn't flow well, a modern cat isn't going to hurt power on a stock engine unless it's clogged up.
I just thought it was the thing to do. I havent biult a auto since the 70's and back then they were real constrictive. I guess I need to read up on this a lil more. Only been into bikes. Last car I modded was a new 76 vette. So im still learning bout these new fangled toys.

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post #9 of 30 Old 11-25-2008, 12:20 AM
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No cat, And my secondary 02 sencor is still in the pipe and no code
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post #10 of 30 Old 11-25-2008, 02:27 AM
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Quote:
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I just thought it was the thing to do. I havent biult a auto since the 70's and back then they were real constrictive. I guess I need to read up on this a lil more. Only been into bikes. Last car I modded was a new 76 vette. So im still learning bout these new fangled toys.
people still think it's the think to do. it will change the exhaust tone but as long as the modern ones aren't breaking up or plugging it doesn't do much to remove them unless you start doing engine mods then you'll need to upgrade the entire exhaust. If your going to build up the motor you could do a high flow larger cat but I personally wouldn't want to spend the money. I won't lie I have removed a cat or 2 on vehicles I've owned but never a functional one on anything from the 90's or newer. I have also never put a cat back on if I bought a vehicle without one.

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post #11 of 30 Old 11-27-2008, 04:56 PM
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Personally I feel that the car makers shoudl make it where if you tamper with the cat the truck wont run. There are no excuses for pulling a perfectly good cat. there have been tests that PROVE removing a functional cat con does nothing for performance. and besides even if there was something wrong with it buying a replacement cat isnt that expensive so again no excuse.

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post #12 of 30 Old 11-28-2008, 06:11 PM
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^^^ On-spot recommendation. An appropriately-sized, properly-functioning cat will not hinder the performance of a full exhaust system. Otherwise is just hearsay.

Recovering from a nasty, nasty accident...
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post #13 of 30 Old 11-28-2008, 06:29 PM Thread Starter
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Thanks for the good info fellas. If it aint broke dont mess with it.

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post #14 of 30 Old 11-30-2008, 06:55 AM
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Quote:
Originally Posted by myrtlebeachbst View Post
No cat, And my secondary 02 sencor is still in the pipe and no code
so you drilled a hole in the straight pipe that took the place of the cat and placed the o2 sensor in there?

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post #15 of 30 Old 11-30-2008, 07:22 AM
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Quote:
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so you drilled a hole in the straight pipe that took the place of the cat and placed the o2 sensor in there?
no the O2 sensor is after the cat in the stock piping, so he left it where it is. he just put the straight pipe where the cat is and left the rest the same

10" round k&n, flow 40 dumped, 3/4 drop
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