HPDI vs EFI

Discussion in 'Outboards' started by naturewaterboy, Nov 6, 2006.

  1. naturewaterboy
    Joined: Sep 2006
    Posts: 211
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    Location: key largo, florida, usa

    naturewaterboy Steel Drum Tuner

    HPDI or EFI? What are the relative fuel efficiencies? Which one last longer without major maintenance?
     
    naturewaterboy, Nov 6, 2006
    #1
  2. Willallison
    Joined: Oct 2001
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    Location: Australia

    Willallison Senior Member

    The direct injenction 2-strokes are generally on a par with most 4-strokes in terms of fuel economy, so are significantly more economical than EFI's.
    The jury is still out probably as far as longevity is concerned - only time will tell. But the Dfi's are certainly more complex, so there's a lot more that can go wrong...
     
    Willallison, Nov 6, 2006
    #2
  3. naturewaterboy
    Joined: Sep 2006
    Posts: 211
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: key largo, florida, usa

    naturewaterboy Steel Drum Tuner

    they are significantly more economical? Anyone have any specific fuel consumption numbers? Also, I see that Yamaha no longer sells EFI's in big engines at least, only HPDI - wonder why that is. Are the HPDI's meeting the strictest emissions standards?
     
    naturewaterboy, Nov 7, 2006
    #3
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