X15 productivity or performance

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Cody1617, May 16, 2021.

  1. Cody1617

    Cody1617 Bobtail Member

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    May 16, 2021
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    I’m in the process of ordering a new truck, my current truck has a DD15, 505 hp, 1750 torque with 2.64 rear ends. It just doesn’t pull up a hill like I want it to.

    My new truck will have a Cummings, but I am torn between the productivity with efficiency hardware or the performance. I’m looking for a nice balance between fuel economy and pulling power. No more than 80,000 pounds.

    The productivity with efficiency hardware option would have 500 hp, 1850 torque and probably 2.84 rears.

    The performance option would have 525 hp, 1850 torque and 2.84 rear ends.

    Any advice would be appreciated.
     
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  3. AModelCat

    AModelCat Road Train Member

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  4. bonder45

    bonder45 Heavy Load Member

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    Williston, ND
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    So, I have both trucks.

    500hp / 1850 tq efficiency
    sleeper truck

    585hp / 2050 tq performance
    day cab

    I can whole hearted say they both get the same milage ( In my applications )
     
  5. Cody1617

    Cody1617 Bobtail Member

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    May 16, 2021
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    What kind of mileage are you getting?
     
  6. bonder45

    bonder45 Heavy Load Member

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    Williston, ND
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    Pulling between 80,000-100,000 I'm averaging 5MPG - 3.91 rears with 18 speeds.
     
  7. Cody1617

    Cody1617 Bobtail Member

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    May 16, 2021
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    Dang, I’m currently getting 7.2
     
  8. Dave1837

    Dave1837 Heavy Load Member

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    Pennsylvania
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    The 565 X15P I ran at my previous job would only get 4.7 tops. That was only with 40-46k, 2021 W900 18 spd 3.36 rears. Had to keep it at 1800 RPMs for it to do anything at all, anything below 1500 it was useless
     
  9. bonder45

    bonder45 Heavy Load Member

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    Williston, ND
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    The joys of have a garbage rear end pulling horrible terrain all day.
     
    Short Fuse EOD Thanks this.
  10. DUNE-T

    DUNE-T Road Train Member

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    With 80-100k? Or with 10k dry van loads?
     
  11. Cody1617

    Cody1617 Bobtail Member

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    May 16, 2021
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    80,000 reefer pounds. Just dropped off a load that was 46,000 pounds, had me right at gross. That 7.1 miles per gallon
     
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