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Delete catalytic converter

Discussion in 'Performance and Tuning' started by tag129, May 26, 2015.

  1. May 26, 2015 at 9:59 PM
    #1
    tag129

    tag129 [OP] New Member

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    Hi everyone,
    I have 2011 4.6L Tundra and I wanna remove 2 of the Cat. Converter.
    Do you have any good suggestions?

    Thx.
     
  2. May 27, 2015 at 7:00 AM
    #2
    matluth

    matluth Fish On!

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    18"X9" FN BFD's rims, 295/70R/18E Cooper Discoverer STT Pro's, upgraded to Old Man EMU coil-overs/shocks. Toytec shackles Next: true dual exhaust, new UCA's.
    Will you have problems with the your states' emissions people? I would verify that first before proceeding.
     
  3. May 27, 2015 at 7:45 AM
    #3
    tag129

    tag129 [OP] New Member

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    No problem. I know there 4 cats and I wanna remove 2 to make the truck breath better.
     
  4. May 27, 2015 at 7:57 AM
    #4
    matluth

    matluth Fish On!

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    Modern catalytics are very high flow. Not as restrictive as before. Not sure if it will make much difference. The stock muffler is somewhat restrictive. Finally dumped mine but left everything else alone.
     
  5. May 27, 2015 at 1:04 PM
    #5
    Mike

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    yep bank account is running low from it..
    If you want to delete the cats you lose a slight bottom in in torque.

    Do to todays ecm's checking cat with o2 sensors. Now if you delete the cat the ecm will know the values on the o2's will be the same and a cel (check engine light) will come on sooner or later with todays high refresh rate sensors. Upstream and downstream should not MATCH as in the cat delete why the cel will come on.

    If you do delete the cat and dont want the CEL light to come on a rear sim is needed. http://urdusa.com/store/Electronics-Rear-Sensor-Simulator/c66_170/index.html I have one on my tacoma for 4 years now deleted cat and it does what it says it does. It tricks the ecm to open and closed fuel state so the cel will not come on..
     
    Wynnded likes this.
  6. May 27, 2015 at 11:50 PM
    #6
    tag129

    tag129 [OP] New Member

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    What
    what exhaust are you using and did you gain any HP?
     
    matluth likes this.
  7. May 27, 2015 at 11:53 PM
    #7
    tag129

    tag129 [OP] New Member

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    After reading all the info, I probably won't remove the cat. I might have a cat back exhaust, some kinda air intake and a chip.
    Thx everyone, appreciated.
     
  8. May 28, 2015 at 5:40 AM
    #8
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    By chip, I hope you aren't referring to the the $40 ones...why not get a HT, or Bullydog if you aren't already planning that?
     
  9. May 28, 2015 at 6:07 AM
    #9
    matluth

    matluth Fish On!

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    I went the low budget route. Stayed with single set up. I had a used (month or so) Borla Pro XS stainless swapped in for the stock muffler. Retained all existing pipes with some fit adjustments. Could have cut off OEM resonator on tail pipe but left it intact. No drone. I'm sure I gained some HP. Sounds real good. I have only had it since last Friday. On Friday prior to install my MPG indicator registered 10.9 MPG. Now reads 11.3 ( I did install a tonneau on Sunday and this will play into it too.) This is in town driving. I have a long trip coming up so I expect it go up anyways average wise. Still a good indication your MPG can improve if you can somehow force yourself to not get on it. Good luck with that.
     
    Last edited: May 28, 2015
  10. May 28, 2015 at 8:10 AM
    #10
    tag129

    tag129 [OP] New Member

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    Definitely not the $40.00 chip. Who makes a good chip? I wanna use it for more towing.
     
  11. May 28, 2015 at 8:11 AM
    #11
    tag129

    tag129 [OP] New Member

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    Thx
     
  12. May 28, 2015 at 4:45 PM
    #12
    tag129

    tag129 [OP] New Member

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    Next questions.
    Which cat back system works the best and the most quiet?
    And which chip/computer program do you recommend?
    Thx
     
  13. May 28, 2015 at 4:51 PM
    #13
    Mike

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    Borla or corsa is about as you can get quiet without stock exhaust. I have the borla on mine. Love it.

    As for chipping hypertech something like that. But if you really want to do it right do a piggyback system.
     
  14. May 28, 2015 at 4:54 PM
    #14
    tag129

    tag129 [OP] New Member

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    How about magnaflow? Are they quiet?
    Piggy back? What brand?
     
  15. May 28, 2015 at 4:55 PM
    #15
    Mike

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    Magna can be loud. I haven't really heard a quiet one.

    Piggy back what engine and year you have?
     
  16. May 28, 2015 at 4:59 PM
    #16
    tag129

    tag129 [OP] New Member

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    I'm looking for more torque cause I carry about 1,200 lbs in the back everyday.
     
  17. May 28, 2015 at 4:59 PM
    #17
    tag129

    tag129 [OP] New Member

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    No magnaflow then.
    2011, 4.6L
     
  18. May 28, 2015 at 5:01 PM
    #18
    Mike

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    Unichip it. They have the best curves for torque you seek on the 4.6. Plus the Unichip you can change curves so what suits you best.
     
  19. May 28, 2015 at 5:23 PM
    #19
    tag129

    tag129 [OP] New Member

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    Swe
    sweet. Unichip, Borla, Done.
    How about air intake? Is it worth buying the cold air intake($500) or install K&N replacement filter($80.00)?
     
  20. May 28, 2015 at 5:25 PM
    #20
    Mike

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    Keep the paper filter in.. unless you are high dust areas.
     
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  21. May 28, 2015 at 5:45 PM
    #21
    tag129

    tag129 [OP] New Member

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  22. May 28, 2015 at 5:52 PM
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    matluth

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    I was going to stay with the paper, but got a good deal for the K&N with discount at pep boys for $40+tax. Mainly to save a few bucks from replacing the paper ones. Like Mike said, the paper is alright unless you travel dusty back roads all the time. You'd be changing them a lot.
     
    Last edited: May 28, 2015
  23. May 28, 2015 at 11:55 PM
    #23
    tag129

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    I probably will go with K&N and Uni Chip. Then exhaust.
    Thx for the help
     
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  24. May 29, 2015 at 4:17 AM
    #24
    matluth

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    Got an email from K&N last week. If you order online any of their drop in filters or CAI's you get a freebie K&N hat. Think list for drop in is$56 plus shipping.
     
  25. May 29, 2015 at 6:47 AM
    #25
    tag129

    tag129 [OP] New Member

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    Thx.
     
  26. Jun 6, 2015 at 3:15 PM
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    tag129

    tag129 [OP] New Member

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    My exhaust smells like rotten eggs. What can I do?

    Thx
     
  27. Jun 6, 2015 at 3:21 PM
    #27
    Mike

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    Change where you buy your fuel at. You might have contaminated fuel or rare cases the convertor is going out.

    Im willing to bet you picked up fuel with a high sulfer content in it I bet, and yes even in gasoline engines just like diesel you have a sulfer exhaust.
     
  28. Jun 6, 2015 at 4:17 PM
    #28
    tag129

    tag129 [OP] New Member

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    I always buy my fuel from Chevron, that's wierd. This is the first time.

    I will try shell next time.

    Thx.
     
  29. Jun 6, 2015 at 5:13 PM
    #29
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    This sounds like a cat converter issue...
     
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  30. Jun 6, 2015 at 5:24 PM
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    Mike

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    @sean if the fuel has a high content of sulfer the cat really has to work hard to help get those parts per million (ppm) down why you have that smell. Down side it can plug up your cat faster.
     
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