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Exhaust dump before or after rear axle?

Discussion in 'Performance and Tuning' started by Txhouse, Mar 21, 2018.

  1. Mar 21, 2018 at 5:43 AM
    #1
    Txhouse

    Txhouse [OP] New Member

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    All,

    I've seen many people speak of dumping the exhaust pipe to help reduce drone. I see of lot of the dumped exhaust from the manufacturers have a turn down straight off the muffler but every post I've seen on this forum says to dump after the rear axle. Is there a specific benefit to this or is it just easier?
     
  2. Mar 21, 2018 at 5:53 AM
    #2
    Casper3

    Casper3 New Member

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    I would think it helps cut down on in cab noise being further away. :notsure:
     
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  3. Mar 21, 2018 at 7:13 AM
    #3
    UTTundra

    UTTundra New Member

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    I dumped mine after the axle recently. I'd say the drone is slightly more noticeable after dumping. I have a resonator installed in the bend of the pipe, just behind the axle.

    [​IMG]
     
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  4. Mar 21, 2018 at 7:35 AM
    #4
    dragos28

    dragos28 New Member

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    nothing much
    mine is before.
     
  5. Mar 21, 2018 at 7:47 AM
    #5
    dirtydeeds

    dirtydeeds New Member Vendor

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    Rule of thumb:

    Exit as far back as possible and exit the vehicle completely.

    Dumping after axle at least follows part of the rule.

    When a customer asks for a dump I normally try to figure out if drone is a concern for them. If it is then I try to talk them out if a dump. But if it absolutely has to be dumped then after the axle is the next choice.
     
  6. Mar 21, 2018 at 7:55 AM
    #6
    fisherman951

    fisherman951 New Member

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    Before axle( under cab) will be loud in the cab. The further back you dump it the less cab noise
     
  7. Mar 21, 2018 at 1:13 PM
    #7
    Txhouse

    Txhouse [OP] New Member

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    Thanks all, makes perfect sense. I was just curious after reading all the other posts.
     
  8. Mar 21, 2018 at 1:17 PM
    #8
    Mountun Goat

    Mountun Goat It’s grazing season

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    Not only will it be louder but you’ll be huffing exhaust all day long while idling and outside your truck. Such as putting groceries in it. Or your kids. Which isn’t cool imo.
     
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  9. Mar 21, 2018 at 1:27 PM
    #9
    831Tun

    831Tun crazy Bastrd

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    TC LT w/ king 2.5 C/O and bypass, ADS bypass rear, Toytech shackles, TRD dual exhaust dumped, KM3 37s on Method standard +18. N_Fab front bumper, Westin rear w/ hitch relocate, RCI skids, Desert Eagle tranny skid, All Pro sliders, ARB dual compressor, 5.29 gears and ARB rear locker
    I've got the TRD dual and it's dumped in front of the axle. My ride height required that I remove the tail pipes 'cause they were hitting the leafs.
     
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  10. Mar 21, 2018 at 1:47 PM
    #10
    Mountun Goat

    Mountun Goat It’s grazing season

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    I’ll be doing this after lift as well. I’ll be chopping all the fender add behind my rear wheels so most likely dump infront of rear wheels. I don’t like exhaust fumes. But I’ll take em for cool truck factor haha
     
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  11. Mar 21, 2018 at 2:01 PM
    #11
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    I had the same situation as @831Tun
    But I marked and cut the pipes right where they would be hitting the springs. This got the “dump” farther to the rear and aimed outward.
    4E3D23D7-FEB3-4F32-938C-379EA4CFAA25.jpg 3A34E6C2-88F2-4560-B79C-852185B46598.jpg
    Keep in mind, these pictures are taken with the wheel off the ground and in full droop. Normally the exhaust is exiting below the springs not into them.
     
  12. Mar 21, 2018 at 2:32 PM
    #12
    Mountun Goat

    Mountun Goat It’s grazing season

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    I like it. Good idea
     
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  13. Mar 21, 2018 at 2:40 PM
    #13
    831Tun

    831Tun crazy Bastrd

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    TC LT w/ king 2.5 C/O and bypass, ADS bypass rear, Toytech shackles, TRD dual exhaust dumped, KM3 37s on Method standard +18. N_Fab front bumper, Westin rear w/ hitch relocate, RCI skids, Desert Eagle tranny skid, All Pro sliders, ARB dual compressor, 5.29 gears and ARB rear locker
    Actually a much better solution. My dumped pipes tend to "leaf blow" any dust that's under the truck.
     
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  14. Mar 21, 2018 at 2:55 PM
    #14
    dcsleeper408

    dcsleeper408 BASTRDS

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    very nice!
    need to get your rear diff breather mod on.
     
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  15. Mar 21, 2018 at 3:02 PM
    #15
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    Yeah you are right, I’m just a slacker
     
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  16. Mar 21, 2018 at 4:01 PM
    #16
    gosolo

    gosolo “The .com stands for communist”, Dale Gribble

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    6BE6EF19-8E9D-4723-B79B-DBBEAD834F86.jpg
    FOUND!

    @dcsleeper408
    Where’s that mod thread for the rear diff breather? I looked but could not find it
     
    Last edited: Mar 21, 2018
    Mountun Goat likes this.

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