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deleting catalytic converters

Discussion in '1st Gen. Tacomas (1995-2004)' started by tacomaman06, Apr 7, 2011.

  1. Apr 7, 2011 at 9:15 AM
    #1
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    For those who have deleted them on the 3.4........did it make any difference in anything......more or less...did it mess anything up? I know its not a big power changer or anything else..but I figure the truck will breathe better. I am gonna cut the section of cats out and wekd in a piece of pipe.....and get a urd o2 sensor sim for the rear sensor.

    Who all has done this and what has been the outcome?
     
  2. Apr 7, 2011 at 11:43 AM
    #2
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
  3. Apr 7, 2011 at 11:44 AM
    #3
    brutalguyracing

    brutalguyracing BIG DADDY

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    F.U> GUYZ
    broken mods
    thats illegal:rolleyes:
    i used to knock out the guts in my old school camaro's:D
    free bump g/l
     
  4. Apr 7, 2011 at 11:45 AM
    #4
    Slodgetto

    Slodgetto Über Posre

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    yeah... I'm pretty sure that's illegal.
     
  5. Apr 7, 2011 at 11:46 AM
    #5
    memario1214

    memario1214 Vivid Illumination Vendor

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    I have done it on my 4.0L, but that doesn't answer your question. Let me know if you have any questions regardless
     
  6. Apr 7, 2011 at 11:52 AM
    #6
    WhatThePho?

    WhatThePho? Greg Graffin 2016

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    The things required to pull bitches
    I made a pipe with matching stock flanges and put those on instead of my cat. It pretty raspy at times. You don't really feel a difference on anything maybe loose out on top end power.
     
  7. Apr 7, 2011 at 11:57 AM
    #7
    capetaco12

    capetaco12 .<>./

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    I have heard its a bad idea in the stock form, you lose backpressure and the motor runs worse. IIRC someone on ttora did a dyno and the truck actually lost power.
     
  8. Apr 7, 2011 at 12:32 PM
    #8
    Super Stroked

    Super Stroked Well-Known Member

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    Yup, did it on my last truck just to see what it would do and it sucked. I had some high flow cats ready to go on so i didn't run it like that but a day or so.
     
  9. Apr 7, 2011 at 12:40 PM
    #9
    jgwheeler17

    jgwheeler17 I'm a zit. Get it?

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    you would only lose a relevant amount of back pressure if you cut the whole pipes way on back. as long as he's keeping the pipes he'll probably be fine. . . and the best i can answer your question OP - a friend that use to work for me has your exact truck and he cut out everything, cats, all sensors, muffler, just straight piped it. best i know he's never had a problem with it. sounds like shit, but that's just because he doesnt have a muffler haha.
     
  10. Apr 7, 2011 at 12:41 PM
    #10
    steve o 77

    steve o 77 braaap

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    not where I live, no emissions testing FTW!
     
  11. Apr 7, 2011 at 2:18 PM
    #11
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    same here.....they gave up emmissions testing a long time ago.

    all im really going to do is replace the roughly 2 foot section of piping where the cats are....after the first sensor and before the last sensor, and then install a urd sensor sim so the readings are right. and im leaving all piping back to rear of truck the same, with my dynomax turbo muffler still there. im just trying to make sure there isnt a bottom end power loss/torque loss...stuff like that before i do it.

    i figure it'll make the truck breathe a bit better, make add a lil mileage to it since there isnt gonna be any real restriction to it. i already know there will be very minimal to no power gain from it.
     
  12. Apr 7, 2011 at 2:33 PM
    #12
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Not sure what to do man. You would only need to replace the front because the rear one isn't monitored. I've heard Walker CAT's work with these trucks. They're $212 (direct fit)at rockauto with a $30 mail in rebate.
     
  13. Apr 7, 2011 at 2:35 PM
    #13
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    what do you mean the rear one isnt monitored? both are in line after the first sensor, but before the last one. and im sure nothing is wrong with them at all(thought a while back something was...but i doubt it now), but i kinda wanna get rid of the cats altogether since i know they are a bit restrictive.
     
  14. Apr 7, 2011 at 3:53 PM
    #14
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    Anyone else?
     
  15. Apr 7, 2011 at 4:15 PM
    #15
    Yamaha Dave

    Yamaha Dave Well-Known Member

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    You will lose bottom end which is what you need for the trails and mudding and it will sound like shit.

    Oh and removing the cat has nothing to do with the Tacoma "breathing" as you call it...
     
  16. Apr 7, 2011 at 4:18 PM
    #16
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    not really sure how it will sound like shit........I ain't straightpiping the whole damn thing....I'm leaving my muffler on. As for "breathing" as I call it.........sucking air in and getting it out quickly.......breathing.;)
     
  17. Apr 7, 2011 at 4:21 PM
    #17
    tacomaman06

    tacomaman06 [OP] Carolina Alliance: Enforcer

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    getting there....
    As far as bottom end goes...ill probably add a resonator in so I have no bottom end loss.
     
  18. Apr 7, 2011 at 4:42 PM
    #18
    jcremeans11

    jcremeans11 Well-Known Member

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    From what I've heard, you lost some power and gas mileage from straight piping. Might as well go for it though at least to see what it sounds like and runs like. You can always put it back on.
     
  19. Apr 7, 2011 at 5:26 PM
    #19
    Gage

    Gage Active Member

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    This makes the environment sad :( and captain planet hate you
     
  20. Apr 7, 2011 at 5:36 PM
    #20
    maineah

    maineah Well-Known Member

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    Most states with out emission inspection will flunk the truck on visual with no cats. Leave them on the truck may not breath well be we will.
     
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