X15 Efficiency vs Performance

Discussion in 'Trucks [ Eighteen Wheelers ]' started by rjs, Jan 12, 2019.

Which X15 overall?

  1. Performance

  2. Efficiency

Results are only viewable after voting.
  1. bonder45

    bonder45 Road Train Member

    1,474
    4,005
    Oct 2, 2011
    Williston, ND
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    That I do not know.


    565 - 4.30
    605 - 4.10
     
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  3. ravisidhu05

    ravisidhu05 Bobtail Member

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    May 30, 2021
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    What weight and how many axles you pull with these motor
     
  4. Masonry

    Masonry Bobtail Member

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    Oct 11, 2020
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    How did your purchase work out… I have exactly the same truck 565 w/ 1850 Torque but mines an automatic so far everything’s good
     
  5. Short Fuse EOD

    Short Fuse EOD Road Train Member

    1,328
    3,266
    Jul 29, 2015
    Fortuna Faviet Fortibus
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    3.25 rears 18 sp 22.5 low pro pull Midwest to west. Got a 565/2050 performance. Anyone bump up to 605/2050 from a 565/2050? Thoughts?
     
  6. bonder45

    bonder45 Road Train Member

    1,474
    4,005
    Oct 2, 2011
    Williston, ND
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    4 axle trucks, 3 axle trailers

    Pulling 100-135k lbs
     
  7. ravisidhu05

    ravisidhu05 Bobtail Member

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    May 30, 2021
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    Your 605 is x15 productivity series your truck is going to pull load better then performance series with little better MPG.
     
  8. dhillon05

    dhillon05 Bobtail Member

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    Oct 20, 2021
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    i am going to buy cummins x15 efficency series i am going to start dry van reffer and flat bed from canada to us can any one recommend me what horse power and torque whould be best for me. i am asking because its my first truck for cummins
     
  9. bonder45

    bonder45 Road Train Member

    1,474
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    Oct 2, 2011
    Williston, ND
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    500 for fuel mileage with an auto
     
    dhillon05 Thanks this.
  10. ravisidhu05

    ravisidhu05 Bobtail Member

    21
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    May 30, 2021
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    You can only get high 500v in productivity series. That’s the best so far.
     
  11. Midwest Trucker

    Midwest Trucker Road Train Member

    5,227
    17,521
    Aug 31, 2018
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    450 hp 1650 torque with endurant 12 speed auto. 2.79 gears and 22.5 low pro tires.
     
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