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where to mount o2 sensor. odd setup.

Discussion in 'EFI Tuning Questions and Engine Management' started by TURBO TJ, Jun 16, 2011.

  1. TURBO TJ

    Joined:
    May 31, 2011
    98 Wrangler 2.5. To4e Turbo mounted in front of engine off of AC compressor bracket. Stock o2 is just after collector. From collector( header ) to Turbo is about 4 feet of exhaust. It runs under the oilpan and up to the Turbo. The new innovate Wideband came with the new sensor and bung. Everyone says after the Turbo but why not before considering the distance. ?
     
    TURBO TJ, Jun 16, 2011
    #1

  2. TurboNova

    Joined:
    Jun 18, 2004
    Because the back pressure of the turbo to header will skew the reading and your innovate sensor will overheat. You are going to get a better collective reading after the turbo 12" or so.
     
    TurboNova, Jun 16, 2011
    #2

  3. 302f150

    Joined:
    Mar 6, 2007
    Heat and pressure. Put it after the turbo and in the tuner there should be a setting somewhere to adjust the delay fo rthe O2 sensor readings. At higher rpm it isnt a big deal, at idle there can be a decent delay
     
    302f150, Jun 18, 2011
    #3

  4. TURBO TJ

    Joined:
    May 31, 2011
    Cool. Should I move the stock o2 as well.?
     
    TURBO TJ, Jun 23, 2011
    #4

  5. 302f150

    Joined:
    Mar 6, 2007
    All your O2 sensors need to be post turbo.
     
    302f150, Jun 23, 2011
    #5

  6. blkchevyz

    Joined:
    Nov 7, 2006
    will a narrow band work ok pre turbo? with a single setup the computers not going to know what side to adjust?
     
    blkchevyz, Jun 23, 2011
    #6

  7. 302f150

    Joined:
    Mar 6, 2007
    It will work shortly and then die due to the extreme conditions. If you are tuning your own setup you should have a setting to lock both banks to the same adjustment rate, or you can mount both O2 sensors and a wideband, mount the wideband in front so it gets the best reading.
     
    302f150, Jun 25, 2011
    #7

  8. TURBO TJ

    Joined:
    May 31, 2011
    Done and done. Wideband and stock. Thanks all.
     
    TURBO TJ, Jun 30, 2011
    #8
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