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Replacing wastegate on 3406c turbo

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Gambino1994, Apr 11, 2017.

  1. Apr 11, 2017 #1
    Gambino1994

    Gambino1994 Light Load Member

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    causing a situation
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    3zj 425 horse. It has a wastegate turbo currently part #112-6918. In my research it's a garret gt75?? It seems to run pretty healthy, overhauled, fuel screws set, afrc turned to smoke a bit and I just went thru the aftercooler and all is good. I can get 21-22 max boost but if I pinch the line I can hit 30psi. Should I see that much difference in pinched vs open
     
    Gambino1994, Apr 11, 2017
    Gambino1994, Apr 11, 2017
    #1
    Oxbow Thanks this.
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  3. Apr 11, 2017 #2
    swaan

    swaan Road Train Member

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    BC canada
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    Yes.
    21-22 psi is within spec.
    Dont pinch off the gate. It will not get you more power.

    Sounds like its all working as it should.

    If your egts are fine then leave it alone.

    Should be a garrett gt47 frame turbo if i recall.
     
    swaan, Apr 11, 2017
    swaan, Apr 11, 2017
    #2
    Oxbow and Gambino1994 Thank this.
  4. Apr 12, 2017 #3
    Oxbow

    Oxbow Road Train Member

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    I have a BW 177148 waste gated turbo on a 4MG, and I get 24 to 26 lbs. of boost, which is pretty close to what you get.
     
    Oxbow, Apr 12, 2017
    Oxbow, Apr 12, 2017
    #3
    Gambino1994 Thanks this.
  5. Apr 13, 2017 #4
    Gambino1994

    Gambino1994 Light Load Member

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    Did you have a wastegated turbo on your 4mg before the 177148 oxbow? What was your boost with the cat turbo I wonder? I was going to get that exact turbo but this one seems fine
     
    Gambino1994, Apr 13, 2017
    Gambino1994, Apr 13, 2017
    #4
    Oxbow Thanks this.
  7. Apr 13, 2017 #5
    Oxbow

    Oxbow Road Train Member

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    Just the old stock turbo before. About 18 psi max with stock fuel settings - up to 27 or so if you turned the fuel screws out enough.
     
    Oxbow, Apr 13, 2017
    Oxbow, Apr 13, 2017
    #5
  8. Apr 13, 2017 #6
    SmokinCAT

    SmokinCAT Road Train Member

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    177148 is one of the best options.

    The series of charger used is the generation before the GT series, it may be the same basic charger as a GT47 but likely older aero wheels.
     
    SmokinCAT, Apr 13, 2017
    SmokinCAT, Apr 13, 2017
    #6
    Oxbow Thanks this.
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