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Mbn cat ecm reflash

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by gfunk939, Sep 2, 2022.

  1. Sep 2, 2022 #1
    gfunk939

    gfunk939 Bobtail Member

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    Sep 2, 2022
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    I have a mbn that the turbo went out and instead of buying a $3000 oem turbo I got a non waste gate turbo from full tilt but with that I’m running a stock ecm 475 hp. Is there some tuning I can do to wake her up I don’t want to get crazy hp 600 is max as long as it’s safe. I got money so..
     
    gfunk939, Sep 2, 2022
    gfunk939, Sep 2, 2022
    #1
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  3. Sep 2, 2022 #2
    bjytech

    bjytech Light Load Member

    239
    220
    Nov 9, 2013
    Ohio
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    Once getting rid of that weak factory turbo most people get it flashed with a 6NZ file, it should make it a whole new truck as long as everything else is in order, and you can actually get some fuel mileage out of a MBN then driving sensibly.
     
    bjytech, Sep 2, 2022
    bjytech, Sep 2, 2022
    #2
    spsauerland Thanks this.
  4. Sep 6, 2022 #3
    High Stepping

    High Stepping Light Load Member

    52
    25
    Oct 29, 2020
    Mississippi
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    100% Agree! It's quite a different animal after a 6nz tune.
     
    High Stepping, Sep 6, 2022
    High Stepping, Sep 6, 2022
    #3
  5. Sep 7, 2022 #4
    gfunk939

    gfunk939 Bobtail Member

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    Sep 2, 2022
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    Ok great thanks! Yeah the motor was out of framed 200k ago so she’s got some life left in her
     
    gfunk939, Sep 7, 2022
    gfunk939, Sep 7, 2022
    #4
  7. Sep 7, 2022 #5
    gfunk939

    gfunk939 Bobtail Member

    3
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    Sep 2, 2022
    0
    Would cat flash it to 6nz or?
     
    gfunk939, Sep 7, 2022
    gfunk939, Sep 7, 2022
    #5
  8. Sep 8, 2022 #6
    Rubber duck kw

    Rubber duck kw Road Train Member

    6,092
    17,685
    Dec 9, 2017
    0
    Doubtful but they might.
     
    Rubber duck kw, Sep 8, 2022
    Rubber duck kw, Sep 8, 2022
    #6
  9. Sep 9, 2022 #7
    Cdemars316

    Cdemars316 Medium Load Member

    686
    3,774
    Nov 10, 2018
    0
    Cat won't do it, I have the 550 file in mine and it is night and day, went from 5ish to 6.25 on fuel mileage, looking at different turbos now, what turbo did you go with? I just regeared down to 2.74's so I need something that boosts good on the lower rpm range
     
    Cdemars316, Sep 9, 2022
    Cdemars316, Sep 9, 2022
    #7
  10. Sep 9, 2022 #8
    lester

    lester Midwest's #1 Feed Hauler

    2,920
    7,886
    Jan 2, 2012
    NW, Iowa
    0
    How low of rpm are you planning to run?
     
    lester, Sep 9, 2022
    lester, Sep 9, 2022
    #8
  11. Sep 11, 2022 #9
    Cdemars316

    Cdemars316 Medium Load Member

    686
    3,774
    Nov 10, 2018
    0
    Once I get everything set my cruise rpm should be right around 1300-1350, its pretty flat where I run, actually really flat, I went from 3.55's to 2'74's simply for the fact that alot of the winter the wind is so brutal even the most aero trucks have trouble pushing any speed, when it is like that I will be in direct going my 60-65, and when I turn around and the wind is pushing me I can make up for it in od and get really good mileage
     
    Cdemars316, Sep 11, 2022
    Cdemars316, Sep 11, 2022
    #9
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