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Same horsepower - any advantages to bigger engine?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by The Hardcard, Nov 14, 2008.

  1. Nov 14, 2008 #1
    The Hardcard

    The Hardcard Bobtail Member

    36
    9
    Aug 3, 2008
    Los Angeles, CA
    0
    I recently saw a dealership with a set of Prostars with ISX 450s in them. Since most 13-liters can do 450-475 hp with up to 1700 ft/lbs of torque, why would anyone want an engine that is 600-800 lbs heavier with no more power.

    A 625 hp, 2050 ft/lbs of torque 15 liter makes sense to me. But these?

    Is it durability? Or can they later be upgraded? Any other reason?
     
    The Hardcard, Nov 14, 2008
    The Hardcard, Nov 14, 2008
    #1
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  3. Nov 14, 2008 #2
    550hpW900L

    550hpW900L Road Train Member

    1,874
    1,090
    Jan 29, 2008
    norcal
    0
    They can be upgraded also the torque on them is always going to be greater especially down low. I see the bigger motors tend to last longer too.
     
    550hpW900L, Nov 14, 2008
    550hpW900L, Nov 14, 2008
    #2
    Working Class Patriot and C16KIWI Thank this.
  4. Nov 14, 2008 #3
    lego1970

    lego1970 Medium Load Member

    504
    165
    Oct 10, 2008
    Blue Springs, Missouri
    0
    You really have to compare the torque and HP curves related to the rpms. One of the big componants to torque and hp ratings are the bore and stroke sizes. For example the piston speed is the same........10,000 rpms with a 10mm stroke compared to 5000 rpms with a 20mm stroke. One will give better torque numbers and one will give better HP numbers. The goal is to find a comprimise that best fits your application.
     
    lego1970, Nov 14, 2008
    lego1970, Nov 14, 2008
    #3
  5. Nov 15, 2008 #4
    C16KIWI

    C16KIWI Medium Load Member

    575
    142
    Jun 14, 2008
    New Zealand
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    What Lego said,I went with the bigger cube for the same reason as 550 it lends itself to be a lazy an should last longer.
     
    C16KIWI, Nov 15, 2008
    C16KIWI, Nov 15, 2008
    #4
    The Challenger Thanks this.
  7. Nov 15, 2008 #5
    Otter

    Otter Light Load Member

    298
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    Mar 16, 2008
    Milton, VT.
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    The more power the engine has, the less it has to work to do the job.
     
    Otter, Nov 15, 2008
    Otter, Nov 15, 2008
    #5
    The Challenger Thanks this.
  8. Nov 15, 2008 #6
    crazyray

    crazyray Bobtail Member

    43
    4
    Oct 27, 2007
    arcadia LA
    0
    Thanks for the good infro
     
    crazyray, Nov 15, 2008
    crazyray, Nov 15, 2008
    #6
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