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Removing Cats on 2000 ACR

Discussion in 'RT/10 and GTS Discussions' started by WHY U TRY, Oct 13, 2020.

  1. WHY U TRY

    WHY U TRY Enthusiast

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    Hi everyone.

    I wanted to post a new thread about this because everything I was reading was from over a decade ago. I will be removing the cats on my 2000 ACR on the 20th and wanted to know if there is any updated information on where to get what I need to make sure the CEL doesn't kick on? I know a lot of people have done this so it has to be easy. We have no emission worries in OH and the car already has the mufflers removed. Once i get this done I assume I will get it tuned so the fuel map matches the open exhaust. I've read old threads about a Vtec-1 but nothing recently.

    Roe Racing stopped selling the sensor bypasses about 5 years ago according to them.

    Thank you everyone!
     
  2. GTSnake

    GTSnake Enthusiast

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    I don't have CATS and no CEL. I'm not sure if 2000 is any different but I didn't do anything special.

    No CATS and no mufflers? Damm you must have good ear plugs.
     
  3. WHY U TRY

    WHY U TRY Enthusiast

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    Seems to be what most people say regarding cats and CEL. Just hope I’m not the exception. What year is your car?

    And I just don’t understand why a Viper would be anything other than loud and aggressive sounding. The entire car makes that presentation in every other way, why not in its volume as well :)
     
  4. GTSnake

    GTSnake Enthusiast

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    My car is a '97. It's in my signature.

    Loud is nice but with no cats & mufflers to me it would be unbearable after 5 minutes. I don't have either but the turbos and my cross over cut out a lot of the drone so it's not obnoxious.
     
  5. WHY U TRY

    WHY U TRY Enthusiast

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    "updated life insurance" is great in your quote haha

    All done and what I did worked great without any CEL. I bought 2 packages of these non-foulers and opened them up on the inside a little to get the sensor in them. It removed it out of the flow enough and worked perfect. Drove it about 9 hours the following weekend and no lights popped up.

    Here is a link to what I bought. I used 2 for each side

    https://www.amazon.com/gp/product/B0002JMS6I/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
     
  6. mgardner

    mgardner Enthusiast

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    Can you provide an update on those non-foulers to let me know if they really worked or if your CEL turned on eventually?
     
  7. WHY U TRY

    WHY U TRY Enthusiast

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    Happy to update.

    No CEL. I've driven the Viper about 800-900 miles since the cat removal and the non-foulers install. I drove the Viper about 8 hours/600 miles in a day which was 95% on the highway as well as some very spirited driving for the other 200-300 miles. So it's seen both steady cruising RPMs and heavy variations RPMs. I would say I've given it a thorough test and can honestly say I'm very confident it works great.
     
  8. Dan Cragin

    Dan Cragin Enthusiast

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    Removing the catalyst is bad for the environment. For racing use we remove them, but a new calibration is needed to make the car perform at peak performance.
    With the loss of backpressure a new fuel and timing curve is added. The downstream Cataylst monitor is removed as well.
     

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