Man V-8 1200

Discussion in 'Diesel Engines' started by Extra300, Jun 19, 2012.

  1. Extra300
    Joined: Jun 2012
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    Extra300 Junior Member

    Looking for some feedback on this engine

    MAN V-8 1200

    thanks
     
  2. WestVanHan
    Joined: Aug 2009
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    WestVanHan Not a Senior Member

    boatdiesel $25

    What...no Cat?
     
  3. Extra300
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    Extra300 Junior Member

    Right now were leaning towards the MAN if they can get their price where it needs to be.
     
  4. WestVanHan
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    WestVanHan Not a Senior Member

    At least it has better hp ratings than the Cat though I wonder if you realize that.
     
  5. Extra300
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    Extra300 Junior Member

    thanks for all your help, dunno what i would have done without you...
     
  6. WestVanHan
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    WestVanHan Not a Senior Member

    For others reading this...the high hp ratings they advertise are not really useful.

    http://www.boatdesign.net/forums/diesel-engines/options-diesel-engine-1000hp-up-43487.html

    The Cat is 1150 hp and sounds great...but "E" rated. "E"mergency and to be used less than 5% of the time. Continuous is much less than that.
    Try any more,and problems that will show up will not be warranty covered because everything (fuel,air,boost,throttle levels,load,temp. etc) goes into the black box/data recorder.

    IIRC the MAN's hp is for less than 20% of the time, total hours maybe 1000 hrs a year. IIRC no WOT unless at the rated rpm.

    So no firewalling it unless you build up to the rpm. Once again...remember the black box.
     
  7. mydauphin
    Joined: Apr 2007
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    mydauphin Senior Member

    Something to remember:
    The same engine at 300 hp will last forever, at 500 hp it will last a few seasons and at 1000hp a few fishing trips.

    Look at the duty cycle of the engine and the horsepower it is designed for. Many engines are design to be light and be high performance. The 1000hp version will last longer than the tweaked 1200hp.

    From their book:
    The engines for light duty operation are designed for
    a maximum of 1 000 annual operating hours with up
    to 20 percent of time at full load, an average of up to
    50 percent load application and no wide-open
    throttle below rated speed.

    source:http://www.ikegai.co.jp/ikegaidiesel/03product/images/v8-1000-1200.pdf
     
  8. WestVanHan
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    WestVanHan Not a Senior Member

    So my memory isn't all that bad after all..

    Anyways,with the Cats at <5% rating time....every hour you can open it up for just 2.5 minutes.
     
  9. powerabout
    Joined: Nov 2007
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    powerabout Senior Member

    I always go to the continuous rating and do my comparisons there along with HP per Litre
     
  10. mydauphin
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    mydauphin Senior Member

    The heavier the engine per Hp, the longer it will last...
     
  11. FAST FRED
    Joined: Oct 2002
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    FAST FRED Senior Member

    "The heavier the engine per Hp, the longer it will last..."

    Maybe in the old days , but today the engine can be quite light and last IF the engine is operated with the time/hp limits in mind.


    The best way to view an engine is it will burn so many gallons till worn out.

    You set the rate 5GPh or 50 is your'e choice.

    FF
     

  12. mydauphin
    Joined: Apr 2007
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    mydauphin Senior Member

    As a general principal it is still true. There is also a trend to use alloy engines to save weight, those don't last at all with impeccable maintenance. It is all about lifespan. I like engines that last 10 yearsor more of daily use. Most lightweights won't and can't be rebuilt in frame.
     
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