5ek 455 hp vs 475 or 550

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Bovinemoovers, Sep 19, 2014.

  1. Bovinemoovers

    Bovinemoovers Bobtail Member

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    Oct 30, 2012
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    What are the differences between the 455 rated motors and 475 or 550? Besides the file in the computer.
     
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  3. Tmtbob

    Tmtbob Medium Load Member

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    Mar 3, 2014
    Oklahoma
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    I had a 96 set at 455 and just an injector swap is all mine needed. I would guess if it came from factory set at 455 that would be all it needs and if it came as a 435 or less it will need more like turbo and internals. Like I said that's just my guess.
     
  4. Superhauler

    Superhauler TEACHER OF MEN

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    depends on serial# and arrangement # some is just a program and some you have to do a parts change.
     
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