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ISX 15L (cm2250) jake brake ?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by TimberTaxi, Aug 27, 2012.

  1. Aug 27, 2012 #1
    TimberTaxi

    TimberTaxi Bobtail Member

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    Dec 28, 2008
    Dallas, TX
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    Can anybody explain in detail why deleteing the Urea, DPF and EGR weakens the jake on the new ISX 15 (cm2250) ? Dose the DPF and EGR create that much more back presure in the exhaust or is it just something in the ECM that weakens the jake ?
    Thanx TT
     
    TimberTaxi, Aug 27, 2012
    TimberTaxi, Aug 27, 2012
    #1
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  3. Aug 27, 2012 #2
    Sportster2000

    Sportster2000 Road Train Member

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    It is a little bit of the DPF/back pressure, but I think that it has more to do with the VGT than anything. The VGT is what gives you that extra engine braking performance.
     
    Sportster2000, Aug 27, 2012
    Sportster2000, Aug 27, 2012
    #2
  4. Aug 28, 2012 #3
    TimberTaxi

    TimberTaxi Bobtail Member

    34
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    Dec 28, 2008
    Dallas, TX
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    Thanks for the response. I'm not deleteing the VGT until it gives me troubles. But I am told I will still lose jake power just by doing the other deletes.
    TT
     
    TimberTaxi, Aug 28, 2012
    TimberTaxi, Aug 28, 2012
    #3
  5. Aug 28, 2012 #4
    Heavyd

    Heavyd Road Train Member

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    The VGT is used to create additional exhaust back pressure to increasing engine loading and increase braking effectiveness. I don't get into deletes. I have no idea why the deletes would effect it unless the delete no longer uses the VGT through software changes.
     
    Heavyd, Aug 28, 2012
    Heavyd, Aug 28, 2012
    #4
  7. Aug 28, 2012 #5
    Sportster2000

    Sportster2000 Road Train Member

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    Everything that you listed in the original post, if you got rid of them, would not have an effect on the engine brakes. If you are losing engine braking performance it is because the "delete" tuner did something wrong. There I said it. Now I can be hounded by the people that make the deletes by telling them that they are doing something wrong.
     
    Sportster2000, Aug 28, 2012
    Sportster2000, Aug 28, 2012
    #5
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