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CAT eliminators

This is a discussion on CAT eliminators within the External Engine forums, part of the LSx Technical Help Section category; I've heard about these for mustangs, it a peace that you plug your O2 sensors into....anybody heard of these for ...

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    Junior Member Yellow_Bird's Avatar
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    Question CAT eliminators

    I've heard about these for mustangs, it a peace that you plug your O2 sensors into....anybody heard of these for ls1. I wanna run ory with my slp lm's but i need to pass admissions cause its a DD

    Thanks guys

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    Life in the Fast lane sunsetorangess's Avatar
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    You have two options, One is
    02 Simulators, which plug into your rear two sensor locations since you will be eliminating the cats you wont need the sensors. It will keep you ses light off.
    2nd option is to have the car tuned and the codes deleated.
    People say that the sims tend to fail, personaly i have run them for about 2 years now with no issues.
    J
    2001 SS, Its not the car its the Driver that matters....

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    COME AT ME BRO Soltakr's Avatar
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    2002 Camaro SS (crashed)

    I have kooks LT with 3 off-road y-pipe (no cats) and run the stock 02 sensor. I did have the car tuned so I'm getting good reading and better mixture. From what I was told the sims tends to fail too but some people get luck and don’t have any problems. I was advised if you go with the sims the computer doesn’t get after compressions readings and can’t adjust so the motor tends to run on the rich side. Which really isn’t that bad if your making big power. I like having a cleaner running motor, sounds funny not having cats but if you tune is right then your wont be cleaning the back bumper and tips as much. Plus a big reason I kept the stock O2 active is because I'm running a wet N20 kit and need those readings.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by sunsetorangess View Post
    You have two options, One is
    02 Simulators, which plug into your rear two sensor locations since you will be eliminating the cats you wont need the sensors. It will keep you ses light off.
    2nd option is to have the car tuned and the codes deleated.
    People say that the sims tend to fail, personaly i have run them for about 2 years now with no issues.
    J
    2nd option is the right choice.

  5. #5
    cutting and welding mark21742's Avatar
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    when you get the o2s turned off with a tune all that gets turned off is the rear o2s, all they do is make sure the cats are working and throw a code (low catilist) if the cats are not working properly (or removed). the low cat code is what makes you fail emissions tests.
    the front o2s stay active and help the computer keep the correct a/f ratio.

    I hope that helped explain it

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