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Thread: Silent Exhaust. How do I get it?

  1. #21
    boostaholic
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    Re: Silent Exhaust. How do I get it?

    I'm in the midst of adding a resonator on the omni as it currently only has the muffler. With the huge cat I started with, fitting in that resonator is tough. Should know in a couple days if it was worth the effort and $$

  2. #22
    turbo addict
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    Re: Silent Exhaust. How do I get it?

    I already have cat, resonator, with a straight thru muffler then a chamber muffler. Still too loud.




    Also tried two straight thru muffler, loud.
    Last edited by tryingbe; 12-28-2016 at 12:35 AM.

  3. #23
    turbo addict
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    Re: Silent Exhaust. How do I get it?

    I have a offset straight through style ultraflo that was super quiet, maybe that with another muffler in series will be quiet enough for you

  4. #24
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: Silent Exhaust. How do I get it?

    Swap the chamber muffler for a turbo muffler.
    Rob M.
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    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  5. #25
    boostaholic
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    Re: Silent Exhaust. How do I get it?

    I think this has to do with car length as well. The omni's seem loud no matter what you throw at them.

  6. #26
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: Silent Exhaust. How do I get it?

    Quote Originally Posted by tryingbe View Post
    I already have cat, resonator, with a straight thru muffler then a chamber muffler. Still too loud.

    Also tried two straight thru muffler, loud.
    Straight thru bullet type mufflers are loud. Need the ones with the big oval can like dynomax race magnum (pic below) with more volume of glass fiber to absorb noise. night and day difference.


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  7. #27
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    Re: Silent Exhaust. How do I get it?

    Quote Originally Posted by Force Fed Mopar View Post
    Swap the chamber muffler for a turbo muffler.
    This is what I probably will do.

  8. #28
    Garrett booster
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    Re: Silent Exhaust. How do I get it?

    Convert it to electric like this guy did to his 1987 & 1988 Dodge Daytonas.

    https://daytonaev.wordpress.com/

  9. #29
    Supporting Member Turbo Mopar Contributor zin's Avatar
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    Re: Silent Exhaust. How do I get it?

    If the goal is just to reduce the perceived "noise" in the cabin, a number of car makers have employed "noise cancelling" by way of speakers under the dash that are out of phase with the objectionable tones.

    I've imagined using a BOSE noise canceling headset as the basis for such a device. The problem would be making it selective, as it would seek to cancel the sound input from the microphone, which would include voice and music, etc.

    Another more "mechanical" way to go may be to break up the single 3" tube to two equivalent (area) tubes. The large diameter tubes allow sound to propagate much easier...

    Two 2 1/8" pipes have the same flow area, so the restriction should be minor, but will restrict the noise. Also, there are dual in/out mufflers that would help with installation.

    I'd still use two, one where the cat/resonator would be and the other out back, with tips clearing the bumper a bit.

    Best of Luck!

    Mike
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  10. #30
    Hybrid booster
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    Re: Silent Exhaust. How do I get it?

    I assume you don't have the exhaust touching the crossmember nor any part of the tunnel. I had that once and the drone was terrible! I make sure that there is plenty of daylight around the pipe in that area.

  11. #31
    Slugmobile & MeanMini Caretaker Turbo Mopar Contributor wheming's Avatar
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    Re: Silent Exhaust. How do I get it?

    As mentioned previously it is also very important for the tailpipe to actually clear the back of the vehicle.
    My PT was practically unbearable before i extended the tailpipe just a few extra inches.
    So those extra inches do matter...
    Wayne H.

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  12. #32
    boostaholic
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    Re: Silent Exhaust. How do I get it?

    Interesting! I have the omni muffler terminating at about mid bumper. Perhaps it should be further? To past the bumper?

  13. #33
    Slugmobile & MeanMini Caretaker Turbo Mopar Contributor wheming's Avatar
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    Re: Silent Exhaust. How do I get it?

    Quote Originally Posted by going4speed View Post
    Interesting! I have the omni muffler terminating at about mid bumper. Perhaps it should be further? To past the bumper?
    The pt has a plastic bumper cover, and i had to extend my pipe out past it. When it exited the muffler under the cover it had some bad resonance.
    Try extending and see what difference it makes for you.
    Wayne H.

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  14. #34
    turbo addict
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    Re: Silent Exhaust. How do I get it?


  15. #35
    turbo addict Turbo Mopar Contributor
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    Re: Silent Exhaust. How do I get it?

    I run my 3.0 Holset with nothing but 3" pipe, and it extends past the bumper a few inches so the sound doesn't bother me in the car (drone). Its only difficult to have a quiet conversation but never bothersome.

    How do we talk about silent plus straight through mufflers with a straight face? Needs to be something like what JT posted. Something with a lot of packing material. My old 3" ultraflow that had the 4" inner pipe seems like it causes noise...
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  16. #36
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    Re: Silent Exhaust. How do I get it?

    I was in AJ's woody wagon yesterday, it is world's quieter than my Omni. Might just have to go with a 2.5 inch muffler.

    http://www.turbo-mopar.com/forums/sh...gon&highlight=

    http://www.turbo-mopar.com/forums/sh...day&highlight=

  17. #37
    boostaholic
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    Re: Silent Exhaust. How do I get it?

    What muffler is on the wagon?

  18. #38
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    Re: Silent Exhaust. How do I get it?

    Quote Originally Posted by going4speed View Post
    What muffler is on the wagon?
    2.5 inch straight thru.

  19. #39
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: Silent Exhaust. How do I get it?

    Quote Originally Posted by going4speed View Post
    no one checked into this more?

    it actually works from what ive seen on the net.

    http://forums.corral.net/forums/gene...tely-gone.html

    it will take some math and some calculating but it should work.



    of course, for a 4 cyl the pipe should be 2x as long as a v8 from what i read.

    im gonna try it. id like to remove all my mufflers and see how bad it would be

    ill put it as far to the rear of the vehicle as possible.

    for those with side pipes, you could use the rest of a regular exhaust in the normal exhaust location capped off teed into the side pipe.

    this seems to be only solution to drone that doesnt reduce power.

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

  20. #40
    Hybrid booster Turbo Mopar Contributor
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    Re: Silent Exhaust. How do I get it?

    Tryingbe, is your car a automatic or a 5 Speed?
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