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#1
11-06-2006, 07:35 PM
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| HPDI vs EFI HPDI or EFI? What are the relative fuel efficiencies? Which one last longer without major maintenance?
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#2
11-06-2006, 10:18 PM
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| 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...
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#3
11-07-2006, 11:21 PM
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| 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?
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