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Westport Innovations Inc. Message Board

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  • wskip99 wskip99 May 30, 2012 8:38 PM Flag

    WPRT has 20% more torque than the CMI engine

    OK please tell us all EXACTLY where in that doc it says that the Cummins 15L engine produces 20% less torque than the Westport-HD.It doesn't, because the Cummins 15L NG SI engine is currently still in the developement stage & that information has yet to be released. While I do think it's quite likely that the Westport-HD with HDPI technology will come out on top, as CI (Compression Ignition aka Diesel engines) are, for the most part,much more efficient than SI (Spark Ignition)engines it, in all reality, still remains to be seen. You can't apply a blanket statement basically saying that, "HDPI provides more power" to each & every engine that is not using HDPI.
    Also if you look at the transcript of the recent CC page 17 David Demers, in response to a question, says "We don't offer CNG with the direct-injection product yet,for example, so if you really are wedded to CNG you're going to be getting a spark-ignited engine." So perhaps Cummins sees a need for an SI engine that has a bit more oomph than other SI offerings currently available for someone that, for whatever reason, is locked into CNG as apposed to LNG. And there's no need for rudeness here.

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    • wskip - ok EXACTLY is on page 9 (No specific engine size noted other than HD)!!! SI (Cummins) has 80% torque of diesel and Westport HDMI has "same as diesel", I equate theat to mean 100% of diesel...or SI is 20% And rbtsherman...let's learn to spell...finally I attended the Analyst Day last week and just trying to help...neither long or short....but anyone who has "alot" (it is two words folks) riding on this....might want to do more work, lots of good prospects for the co.

      • 2 Replies to scottjohanson657
      • Page 9 is just a summary
        Ng engines do not have the same torque as diesel at low pm
        So this is worth less,worth nothing
        We do not know the specs on cummins new engine saying it 20% less is a stretch of the truth
        Wprt forced cummins hand when they raised their share at higher volume
        So cummins is just doing what it has to
        Wprt solution
        A expensive automotive transmission and high share for themselves caused this
        You can bet your house that it will not be 20% less
        Cumminus just it covering itself with a cheaper solution for long haulers that do not care about fast the truck goes from starting
        So Cummins may have a cheaper ng solution and transmission and that do not have to give wprt money
        That adds up and wprt was greedy with higher % in volume
        Allowing Cummins to do the work was correct but getting a higher % was a mistake.

      • that doc. gives no specific head to head comparisons.
        it is a blanket statement.
        the Cummins 15L SI is still in developement.
        The other point I was trying to make, & apparently you didn't understand, is that it seems that Cummins sees a need for a 15L SI engine.Westport chose not to partipate. there's no need to bash Cummins for that decision.

    • Thank you especially the rudeness remark

      • 1 Reply to gscgaryc
      • You're quite welcome. Perhaps we should treat this as a discussion board as opposed to a yahoo message board & have some rational discussions instead of arguments. I realize that alot of us are very passionate about the nat gas "revolution" & that from time to time remarks will be made....whether long or short quite a few of us have alot riding on this, so can we try to keep it to a minimum?

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