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Straight pipes on DPF engines

Discussion in 'Ask An Owner Operator' started by ThePettyTruck, Jul 19, 2015.

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  1. Jul 19, 2015 #1
    ThePettyTruck

    ThePettyTruck Bobtail Member

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    Anyone running straights on a DPF motor? I'm curious if it's still loud or a little more mellow. I traded my 04 Freightliner Coronado in on a 15 Lonestar with a 600 Cummins and miss my straights. This thing is entirely too quiet. Thanks.
     
    ThePettyTruck, Jul 19, 2015
    ThePettyTruck, Jul 19, 2015
    #1
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  3. Jul 19, 2015 #2
    rollin coal

    rollin coal Road Train Member

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    Normally larger diameter pipes tone and quieten things down but if it has a DPF on it doesn't matter what diameter pipes are on it. It will always be quiet.
     
    rollin coal, Jul 19, 2015
    rollin coal, Jul 19, 2015
    #2
    Vampire, Studebaker Hawk and Long FLD Thank this.
  4. Jul 19, 2015 #3
    Long FLD

    Long FLD Road Train Member

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    Straight pipes will only be for looks if you have a dpf. And you need the high dollar ones to keep them from discoloring from the heat. If it were me, I'd run a weed burner and put dummy straights on.
     
    Long FLD, Jul 19, 2015
    Long FLD, Jul 19, 2015
    #3
    Vampire and jesse0711 Thank this.
  5. Jul 19, 2015 #3
    hawkjr

    hawkjr Road Train Member

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    I can't even put straights on my non DPF Acert so what I've been told
     
    hawkjr, Jul 19, 2015
    hawkjr, Jul 19, 2015
    #3
  6. Jul 19, 2015 #4
    Long FLD

    Long FLD Road Train Member

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    You can, technically they're supposed to have the catalytic converter mufflers on them though.
     
    Long FLD, Jul 19, 2015
    Long FLD, Jul 19, 2015
    #4
  8. Jul 19, 2015 #5
    hawkjr

    hawkjr Road Train Member

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    Do you know why that is??
     
    hawkjr, Jul 19, 2015
    hawkjr, Jul 19, 2015
    #5
  9. Jul 19, 2015 #6
    Long FLD

    Long FLD Road Train Member

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    On the pre-dpf Acerts that was how they met the emission requirements without egr.
     
    Long FLD, Jul 19, 2015
    Long FLD, Jul 19, 2015
    #6
    whoopNride and hawkjr Thank this.
  10. Jul 19, 2015 #7
    315wheelbase

    315wheelbase Heavy Load Member

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    Instead of wasting your money on straight pipes buy some testosterone pills,
     
    315wheelbase, Jul 19, 2015
    315wheelbase, Jul 19, 2015
    #7
    tarmadilo, flood and Tb0n3 Thank this.
  11. Jul 19, 2015 #8
    ThePettyTruck

    ThePettyTruck Bobtail Member

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    Feb 3, 2014
    Semmes, AL
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    You can suck it there Swiftie. I don't need testosterone pills because I'm not a washed up has been like you are.

    I spoke with a guy who had a set on a 14 Pete 389 with a 500 Cummins and it wasn't loud but it wasn't as quiet as stock but I wasn't sure if he had ran a straight pipe thru the dpf filter as I forgot to ask about it.
     
    ThePettyTruck, Jul 19, 2015
    ThePettyTruck, Jul 19, 2015
    #8
    OlegMel Thanks this.
  12. Jul 20, 2015 #9
    hawkjr

    hawkjr Road Train Member

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    Does the straight pipes effect the exhaust system negatively in any way on the Acert?
     
    hawkjr, Jul 20, 2015
    hawkjr, Jul 20, 2015
    #9
    Socal Xpress Thanks this.
  13. Jul 20, 2015 #10
    Oscar the KW

    Oscar the KW Going Tarpless

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    No, it will breath better, throttle response will improve as well, and egt's normally run cooler. Some people say they pick up a little mileage. I've had two Acerts with straights.
     
    Oscar the KW, Jul 20, 2015
    Oscar the KW, Jul 20, 2015
    #10
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