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X-15 Cummins thread

Discussion in 'Peterbilt Forum' started by KB3MMX, Feb 26, 2018.

Page 35 of 44
  1. Dec 23, 2020 #341
    fuel concierge

    fuel concierge Bobtail Member

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    16087387136388839323653025917418.jpg 16087387136388839323653025917418.jpg 16087387136388839323653025917418.jpg
     

    Attached Files:

    fuel concierge, Dec 23, 2020
    fuel concierge, Dec 23, 2020
    #341
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  3. Dec 29, 2020 #342
    TheFonz

    TheFonz Bobtail Member

    6
    10
    Dec 4, 2020
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    Turns out all the squeeze clamps coming off that metal line were weak
     
    TheFonz, Dec 29, 2020
    TheFonz, Dec 29, 2020
    #342
    D.Tibbitt and Dave_in_AZ Thank this.
  4. Jan 4, 2021 #343
    AKDoug

    AKDoug Medium Load Member

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    802
    Mar 21, 2018
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    Ran the overhead on my new X-15 at 3000 miles.. #6 exhaust was .020".. .002" too tight for tight spec. That was the only one that was off.
     
    AKDoug, Jan 4, 2021
    AKDoug, Jan 4, 2021
    #343
    NWAF, KB3MMX, Dave_in_AZ and 2 others Thank this.
  5. Jan 4, 2021 #344
    magoo68

    magoo68 Road Train Member

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    Jun 11, 2011
    st malo mb canada
    0
    Old school still works . This run it till warranty is off before setting valves don’t work.
     
    magoo68, Jan 4, 2021
    magoo68, Jan 4, 2021
    #344
    Dave_in_AZ Thanks this.
  7. Jan 8, 2021 #345
    AKDoug

    AKDoug Medium Load Member

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    Mar 21, 2018
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    It was so easy to check on this truck that we'll be doing it annually. Also gives us a good chance to visually check the cam wear.
     
    AKDoug, Jan 8, 2021
    AKDoug, Jan 8, 2021
    #345
    Dave_in_AZ and magoo68 Thank this.
  8. Jan 13, 2021 #347
    Cowboycattlac

    Cowboycattlac Bobtail Member

    2
    9
    Jan 13, 2021
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    The efficiency series has 18:1 compression and tendency to lift the head. Performance series has 16:1 compression
     
    Cowboycattlac, Jan 13, 2021
    Cowboycattlac, Jan 13, 2021
    #347
    NWAF, KB3MMX and Dave_in_AZ Thank this.
  9. Jan 15, 2021 #348
    Rodeo_Joe

    Rodeo_Joe Light Load Member

    183
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    Oct 24, 2008
    Blackstock, Ontario
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    You cant down speed the motor that low. Shouldn't go below 1200. Motor cant stand the down speeding that low.

     
    Rodeo_Joe, Jan 15, 2021
    Rodeo_Joe, Jan 15, 2021
    #348
    Dave_in_AZ Thanks this.
  10. Jan 17, 2021 #348
    KB3MMX

    KB3MMX Road Train Member

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    I believe that after having the performance version, it didn't like being below 1400.

    Unfortunately Cummins is trying to keep up with Detroit and Mack/Volvo and the X15 Doesn't seem to be built strong enough in the bottom end to handle downspeed Big TQ at low RPMs.

    They advertise peak TQ at 1000 rpm on X15-E-500/1850
     
    KB3MMX, Jan 17, 2021
    KB3MMX, Jan 17, 2021
    #348
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  11. Jan 17, 2021 #349
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    That's pretty low. Peak tourqe on my ISX is 1250. And it would just run terribly there.

    1325 to 1400 it's very happy.
     
    Dave_in_AZ, Jan 17, 2021
    Dave_in_AZ, Jan 17, 2021
    #349
    jsnell Thanks this.
  12. Jan 23, 2021 #350
    Masonry

    Masonry Bobtail Member

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    Oct 11, 2020
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    Masonry, Jan 23, 2021
    Masonry, Jan 23, 2021
    #350
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