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Straight Pipe 3.4L

Discussion in 'Performance and Tuning' started by MortalLove, May 23, 2017.

  1. May 23, 2017 at 7:29 PM
    #1
    MortalLove

    MortalLove [OP] Well-Known Member

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    Straight piped my 3.4L V6.. Took the cat and muffler out and ran it out the side (Like shown in picture) noticed a loss in power. Anyone offer some input on this? Is this a bad thing?


    [​IMG]
     
  2. May 24, 2017 at 5:43 AM
    #2
    yota243

    yota243 Well-Known Member

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    Roll tide :pccoffee:... fwiw my exhaust exits about right there but I do have a glass pack, and a turbo, and short tube headers... and a 4.0 so this is basically me just bragging now and almost no help at all haha I am not noticing a power loss. they claim that there needs to be some back pressure so the exhaust valves close completely or there is a loss in low end without some forced induction
     
    wheeliest likes this.
  3. May 24, 2017 at 5:46 AM
    #3
    JayRolla

    JayRolla Well-Known Member

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    You lose low end tq but gain high rpm HP. We really only use low rpms so that might be what you notice.

    Either way its usually such a small gain or loss it's not noticeable.

    That thing has to sound God awful. Sound clip?
     
  4. May 24, 2017 at 5:58 AM
    #4
    MortalLove

    MortalLove [OP] Well-Known Member

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    :yawn: I'll post one up later


     
    JayRolla likes this.
  5. May 24, 2017 at 4:17 PM
    #5
    mtnkid85

    mtnkid85 Well-Known Member

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    Put the cat back on for some amount of back pressure. I assume your running an o2 simulator?
     
  6. May 24, 2017 at 4:26 PM
    #6
    MortalLove

    MortalLove [OP] Well-Known Member

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    Exhaust shop took the cat lol
     
  7. May 24, 2017 at 4:30 PM
    #7
    yota243

    yota243 Well-Known Member

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    Bw s256 turbo with 3 in glass pack dumped pre axle raptor liner bed and top rails and fenderflares and rocker panels. Hunter side steps. Plasti-dipped upper fenders and emblems. satin black spray paint here and there inside and out. 5100's set to 1.75" up front . C channel front bumper. Maxxis bighorn 255/85/16
    Get a glass pack... Its still gonna be plenty loud but it will cut just a bit of that "hick crack pop" that usually occurs with just str8 pipes, and it will add a touch of back pressure... Then throw a turbo on it
     
  8. May 24, 2017 at 4:30 PM
    #8
    MortalLove

    MortalLove [OP] Well-Known Member

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    Turbo lol I ain't got that kinda money
     
    yota243 likes this.
  9. May 24, 2017 at 4:32 PM
    #9
    Specalt

    Specalt Well-Known Member

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    That sucks, there is actually value in the cat. Look up the replacement cost if your board..
     
  10. May 24, 2017 at 4:32 PM
    #10
    MortalLove

    MortalLove [OP] Well-Known Member

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    New cat is about 150-200
     
  11. May 24, 2017 at 4:32 PM
    #11
    yota243

    yota243 Well-Known Member

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    Bw s256 turbo with 3 in glass pack dumped pre axle raptor liner bed and top rails and fenderflares and rocker panels. Hunter side steps. Plasti-dipped upper fenders and emblems. satin black spray paint here and there inside and out. 5100's set to 1.75" up front . C channel front bumper. Maxxis bighorn 255/85/16
    Its really not that bad if u can do some fabbin urself. Im sittin at just over half what a supercharger would have been and ill have double the gains to the wheel
     
  12. May 24, 2017 at 4:33 PM
    #12
    MortalLove

    MortalLove [OP] Well-Known Member

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    I can't fab anything
     
  13. May 24, 2017 at 4:34 PM
    #13
    yota243

    yota243 Well-Known Member

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    Bw s256 turbo with 3 in glass pack dumped pre axle raptor liner bed and top rails and fenderflares and rocker panels. Hunter side steps. Plasti-dipped upper fenders and emblems. satin black spray paint here and there inside and out. 5100's set to 1.75" up front . C channel front bumper. Maxxis bighorn 255/85/16
    I wouldnt worry about replacing the cats man u can get the same back pressure with a muffler for less than half the cost
     
  14. May 24, 2017 at 4:35 PM
    #14
    yota243

    yota243 Well-Known Member

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    turbo 05 prerunner trd off road DC
    Bw s256 turbo with 3 in glass pack dumped pre axle raptor liner bed and top rails and fenderflares and rocker panels. Hunter side steps. Plasti-dipped upper fenders and emblems. satin black spray paint here and there inside and out. 5100's set to 1.75" up front . C channel front bumper. Maxxis bighorn 255/85/16
    Not with that attitude... Dont u have youtube?
     
    Dalandser likes this.
  15. May 24, 2017 at 4:36 PM
    #15
    MortalLove

    MortalLove [OP] Well-Known Member

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    Ain't bout to pay a shop to put one on
     
  16. May 24, 2017 at 4:38 PM
    #16
    yota243

    yota243 Well-Known Member

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    turbo 05 prerunner trd off road DC
    Bw s256 turbo with 3 in glass pack dumped pre axle raptor liner bed and top rails and fenderflares and rocker panels. Hunter side steps. Plasti-dipped upper fenders and emblems. satin black spray paint here and there inside and out. 5100's set to 1.75" up front . C channel front bumper. Maxxis bighorn 255/85/16
    Most can be had with flared ends and will slip over ur exhaust pipe. So just take a zip saw and cut out a straight section of pipe and replace it with the muffler and clamp in on. Or go to a mod day where someone has a welder and get them to run 2 beads for u
     
  17. May 24, 2017 at 4:40 PM
    #17
    MortalLove

    MortalLove [OP] Well-Known Member

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    I gotcha. I'm going to leave it how it is for now I think lol
     
    yota243 likes this.

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