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Bobtail Boost pressure ISX435ST

Discussion in 'Trucks [ Eighteen Wheelers ]' started by thehammer69, Dec 29, 2011.

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  1. Dec 29, 2011 #1
    thehammer69

    thehammer69 Light Load Member

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    Oct 31, 2008
    Goose Creek, SC
    0
    I just picked up a another truck yesterday. It's a 2005 International with a Cummins ISX 435ST. I'm curious what the maximum boost pressure you are seeing with similar horsepower EGR ISX's while BOBTAILING. My understanding is the load based speed control will hold the power back so I am just looking for a comparison.....thanks
     
    thehammer69, Dec 29, 2011
    thehammer69, Dec 29, 2011
    #1
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  3. Dec 29, 2011 #2
    Pablo-UA

    Pablo-UA Road Train Member

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    Oct 11, 2010
    Borispol, Ukraine
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    no engine load - no boost)
    to be sure find someone with laptop and run Turbo test (and EGR test too)
     
    Pablo-UA, Dec 29, 2011
    Pablo-UA, Dec 29, 2011
    #2
  4. Dec 29, 2011 #3
    thehammer69

    thehammer69 Light Load Member

    53
    15
    Oct 31, 2008
    Goose Creek, SC
    0
    I know that no engine load equals no boost. I'm just wondering for comparison sake what people have seen bobtailing when shoving their foot into it.

    No need to do egr test as the egr is new and I already disconnected it.
     
    thehammer69, Dec 29, 2011
    thehammer69, Dec 29, 2011
    #3
  5. Dec 29, 2011 #4
    paul 1052

    paul 1052 Heavy Load Member

    899
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    Oct 9, 2010
    Sand Springs, Ok.
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    That's interesting, my Cat will pull full boost while bobtailing.
     
    paul 1052, Dec 29, 2011
    paul 1052, Dec 29, 2011
    #4
  7. Dec 30, 2011 #5
    thehammer69

    thehammer69 Light Load Member

    53
    15
    Oct 31, 2008
    Goose Creek, SC
    0
    I don't know if I'm getting full boost or not as I have no reference for comparison right now. I guess I will know in a week or so when i start working this truck.
     
    thehammer69, Dec 30, 2011
    thehammer69, Dec 30, 2011
    #5
  8. Dec 30, 2011 #6
    pup

    pup Light Load Member

    252
    256
    Dec 3, 2011
    n.h.
    0
    Even bobtail I would expect around 30psi in high gears with your foot in it.
     
    pup, Dec 30, 2011
    pup, Dec 30, 2011
    #6
  9. Dec 30, 2011 #7
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
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    pre egr '02 cat without VGT.....
     
    Pablo-UA, Dec 30, 2011
    Pablo-UA, Dec 30, 2011
    #7
  10. Dec 30, 2011 #8
    thehammer69

    thehammer69 Light Load Member

    53
    15
    Oct 31, 2008
    Goose Creek, SC
    0
    well that is good, because that is what I saw.
     
    thehammer69, Dec 30, 2011
    thehammer69, Dec 30, 2011
    #8
  11. Dec 30, 2011 #9
    snoop20

    snoop20 Bobtail Member

    10
    0
    Dec 13, 2011
    Arkansas
    0
    I got a 05 ISX 475 and it will get about 30psi.
     
    snoop20, Dec 30, 2011
    snoop20, Dec 30, 2011
    #9
  12. Dec 31, 2011 #10
    paul 1052

    paul 1052 Heavy Load Member

    899
    346
    Oct 9, 2010
    Sand Springs, Ok.
    0
    I talked to a buddy today with an '04 ISX and he can pull about 40 lbs bobtailing.
     
    paul 1052, Dec 31, 2011
    paul 1052, Dec 31, 2011
    #10
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