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remove catalytic converter for performce

Discussion in 'Performance and Tuning' started by die2live, Nov 11, 2010.

  1. Nov 11, 2010 at 8:16 PM
    #1
    die2live

    die2live [OP] New Member

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    Dan
    columbus ohio
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    hello everyone has anybody ever removed there catalytic converter to improve airflow to engine. also if so how or what was needed to re program ECU. looking for some advice and a starting point for performce thought starting here would be a good way. Any help would be great.
     
  2. Nov 11, 2010 at 11:16 PM
    #2
    Janster

    Janster Old & Forgetful

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    Illegal...... atleast, in all or most states.
     
  3. Nov 11, 2010 at 11:25 PM
    #3
    woody6047

    woody6047 McGrubber

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    Beau
    Austin/ Waco Texas
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    100%stock, except for the exhaust leak and custom windshield crack mod
    you can get away with it in Texas, but IMO you lose low end.
     
  4. Nov 11, 2010 at 11:31 PM
    #4
    PLC721

    PLC721 Well-Known Member

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    well the doug thorley long tubes too, but yeah trucks pretty loud
     
  5. Nov 11, 2010 at 11:37 PM
    #5
    woody6047

    woody6047 McGrubber

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    Beau
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    100%stock, except for the exhaust leak and custom windshield crack mod
    Yea when i put my DTLT's on i had to change muffler, too loud and i decided to keep one set of cats.
     
  6. Nov 11, 2010 at 11:38 PM
    #6
    PLC721

    PLC721 Well-Known Member

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    damn i thought mine was loud with a flowmaster 40 i cant imagine how good yours sounds with a 10
     
  7. Nov 11, 2010 at 11:42 PM
    #7
    woody6047

    woody6047 McGrubber

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    100%stock, except for the exhaust leak and custom windshield crack mod
    Yea it sounded nasty (the wrong kind) so i switched to a 40. I even had a Z06 resignator on it after the muffler to keep the raspyness down. sounded great until i got the headers.
     
  8. Nov 11, 2010 at 11:44 PM
    #8
    PLC721

    PLC721 Well-Known Member

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    i have a love hate relation ship with mine, idk if mine sou nds diferent being dual tho but i'm redoing it anyway
     
  9. Nov 11, 2010 at 11:48 PM
    #9
    woody6047

    woody6047 McGrubber

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    100%stock, except for the exhaust leak and custom windshield crack mod
    Im a true dual now.

    100_0087.jpg
     
  10. Nov 11, 2010 at 11:54 PM
    #10
    PLC721

    PLC721 Well-Known Member

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    looks just like mine, i have different tips tho
     
  11. Nov 11, 2010 at 11:56 PM
    #11
    woody6047

    woody6047 McGrubber

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    100%stock, except for the exhaust leak and custom windshield crack mod
    I just got a allpro rear and when i put it on, i have a feeling im going to have to get them raised.
     
  12. Feb 2, 2011 at 3:23 PM
    #12
    freewheelin

    freewheelin New Member

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    If i remove my catalytic converters how do i bypass so the check engine light stops coming on ?
     
  13. Feb 2, 2011 at 3:25 PM
    #13
    cohrmundt

    cohrmundt Well-Known Member

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    02 simulators, URD sells em
     
  14. Feb 2, 2011 at 3:33 PM
    #14
    Brunes

    Brunes abides. Moderator

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    I missed this a while back- but a true dual like left and right banks on their own pipes?? Or Dual outlet from the muffler??
     
  15. Feb 2, 2011 at 3:35 PM
    #15
    Brunes

    Brunes abides. Moderator

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    I can read what he wrote- but there have been several folks who have tried and weren't pleased with the performance. It hurts the exhaust scavenging...So I'm curious what he did differently.
     
  16. Feb 2, 2011 at 3:42 PM
    #16
    Brunes

    Brunes abides. Moderator

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    Well...I guess I kind of am. There were a couple folks calling single inlet, dual outlet mufflers "true duals"..so I want to see if that is the case or if he found a fix for the scavenging loss.
     
  17. Feb 20, 2011 at 10:15 AM
    #17
    revhappyleon

    revhappyleon Well-Known Member

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    dual exhaust, foglight anytime, satoshi, chlm, aux backup lights and electric fan conversion
    i'm gonna try a beautiful xpipe i got ahold of have you heard of anyone running some sort of crossover yet?
     
  18. Feb 21, 2011 at 6:31 AM
    #18
    freewheelin

    freewheelin New Member

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    I just removed my exhaust manifolds and cats installed doug thor headers i put 2 resinators in one on each bank then to the y pipe and to the stock muffler with urd 02 sensers sounds great not to metal sounding a nice little rumble i dynoed the truck before and after it gave me an extra 18 hp the 2 resinators give enough back pressure to not lose the low end poer
     
  19. Feb 27, 2011 at 9:20 PM
    #19
    dustinclm

    dustinclm Well-Known Member

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    i dont mean to take over your thread but my question is in the same department...i removed my second cat and have a floawmaster 40 with duels exiting and havehad the CEL forever so i just bought the 02 simulatoer from URD to get rid of the CEL, my question, since the simulator will correct the signal to the ECU, wouldnt that give me back the low end i lost? and correct the air/gas ration and get back an mpg or two? and when my truck settles at idle it at 600rpms...which is a little low, i hope this gets fixed too
     
  20. Feb 27, 2011 at 9:52 PM
    #20
    Chris(NJ)

    Chris(NJ) Well-Known Member

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    No, thats just for the CEL/Emmissions. Cats provide backpressure.
     
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