Cummins 6CTA 450 to QSB 6.7 550

Discussion in 'Downeast Engine Room' started by BillD, Feb 1, 2019.

  1. BillD

    BillD Captain

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    Boat Make:
    25 Terry Jason with Cummins 370 power


    Tony Athens repower.

    Radons are popular out there on west coast.
     
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  2. cb34

    cb34 Captain

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    Thanks Bill, I'm surprised at the fuel burn seems high. WOT stayed the same....what is the weight difference in the two motors
     
    cb34,
  3. BillD

    BillD Captain

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    25 Terry Jason with Cummins 370 power
    6CTA 1975 lbs - QSB 6.7 1450 lbs = 525 lbs in weight savings
     
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  4. Chump Change

    Chump Change Member

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    Cool video. Seems like she could use some tab.

    Hoping to see somebody stuff one of those and a CB30 and the resulting performance numbers.
     
    Diesel Jerry likes this.
  5. Artemis

    Artemis Member

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    1960's powerboat
    450C replaced was EPA Tier 1 motor QSB 550 is EPA Tier 3 impossible to beat the retard rap required to meet lower Nox without some penalty..
     

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