2050lbs of torque

Discussion in 'Ask An Owner Operator' started by Blkcowboy, Oct 22, 2018.

  1. Blkcowboy

    Blkcowboy Light Load Member

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    Looking at a x15 performance engine and was wondering if this amount of torque is really nessersary . My main concern being fuel mileage
     
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  3. Peterbiltt

    Peterbiltt Light Load Member

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  4. snowman_w900

    snowman_w900 Road Train Member

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    That's right
     
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  5. sirjeff

    sirjeff Medium Load Member

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    The more the better, drive it right and you wont burn any more fuel.
     
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  6. Long FLD

    Long FLD Road Train Member

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    Torque is what gets you up the hills.
     
  7. loudtom

    loudtom Road Train Member

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    I won't tell you what is going to happen, but I will tell you the differences I've noticed in a 450hp ISX and 550hp D16. I can drive the bigger engine "right", and get 7 mpg with a fair amount of bobtailing mixed in. I can drive the smaller engine full throttle up the hills and jake brake all the way down them, and I get 8 mpg while almost always loaded.

    There's a reason they make smaller engines.
     
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  8. KB3MMX

    KB3MMX Road Train Member

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    "Main concern being fuel mileage"

    Then no, you need the X15e with 1850Tq@1000rpm

    Performance series is much lower compression and programmed for performance not efficiency.

    With the efficiency series motor you'll want different rears too, in the 2.80 - 3.08 range.

    Big difference in fuel economy, minimal difference in Tq and available at much lower rpm
     
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  9. arrogant steve

    arrogant steve Medium Load Member

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    8 miles per gallon in an ISX? Doubtful. Aside from the X15 Performance model, all the new engines will get good fuel mileage. Of course it depends on gearing, load, route and driver. I fully believe the driver is the biggest factor.
    I've heard really good numbers on all these engines and believe I could get good numbers with all of them pulling reefer at 75k plus gross weight.
    The drivers saying torque is great are correct. That torque will get you to the top of the hill faster than the rest of us. Your fuel mileage will suffer of course. If that's how you validate yourself, then I would say go for those big hp and torque #'s.
     
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  10. Rubber duck kw

    Rubber duck kw Road Train Member

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    The more horse and torque, the more fun it is to drive, at least that's my theory anyway.
     
  11. arrogant steve

    arrogant steve Medium Load Member

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    I fully agree! I had chance to drive a turned up ISX 15, that truck was fun to drive.
     
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