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2 Mufflers or 1 muffler 2 resonators to eliminate rasp Tacoma 4.0 1gr

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Blue2010, Sep 19, 2018.

?

2 mufflers or 1 muffler and 2 resonators

  1. 2 mufflers

    40.0%
  2. 1 muffler and 2 resonators

    60.0%
  1. Sep 19, 2018 at 12:29 AM
    #1
    Blue2010

    Blue2010 [OP] Active Member

    Joined:
    Dec 22, 2017
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    #239124
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    Male
    Vehicle:
    2013 tacoma double cab sport 4x4
    My current setup is afe cai stage2, nst pulley kit, nst ims, 76mm tb, tbs, magnaflow muffler stock exhaust, Urd equal length headers, urd competition y pipe with no cats

    I wrote down the information and specs of of the muffler and resonators. As I was told the longer the muffler the less sound it’ll make and when I installed it the sound level was almost as stock but a little deeper which was what I wanted. When I installed the urd spec u headers and urd y pipe and the vibrant ultra quiet resonator I had a terrible rasp across the rpm. Now I just installed the vibrant bottle style resonator and it really helped a lot but there is still a very annoying rasp in the 3k rpm range.

    I also read a post from superwerty a while back selling his custom exhaust. And stated “I experimented with different muffler combo's until I finally found something that sounded perfect and eliminated rasp completely.”

    His kit had 2 magnaflow mufflers. (1) 4x9x14 and (1) 5x11x22

    I don’t now if I should delete the ultra quiet resonator and get another bottle style resonator or do what superwerty did which was getting those magnaflow mufflers.

    This is what I am currently using in my catback exhaust

    Magna flow muffler 12579


    · CONFIGURATIONCENTER/CENTER

    · LENGTH22 IN

    · OVERALL LGTH28 IN

    · IN/OUT DIA3/3 IN

    · FINISHSATIN


    Vibrant 1141 2.5" Ultra Quiet Resonator

    · Designed to dampen exhaust noise

    · Facilitates undisrupted exhaust flow

    · Constructed from t304 stainless steel

    · Features a "true straight through" perforated core

    · Withstands high exhaust temperature



    Vibrant 1793 Bottle Style Resonator

    · Designed to dampen exhaust noise

    · Facilitates undisrupted exhaust flow

    · Constructed from t304 stainless steel

    · Features a "true straight through" perforated core

    · Withstands high exhaust temperature


    Any advice will be greatly appreciated, thank you!!!
     
  2. Sep 19, 2018 at 8:18 AM
    #2
    crashnburn80

    crashnburn80 Vehicle Design Engineer

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    Go Hawks!
  3. Sep 19, 2018 at 1:08 PM
    #3
    Flowmaster Exhaust

    Flowmaster Exhaust Well-Known Member

    Joined:
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    #226872
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    First Name:
    Flowmaster
    You posted that you have a 3.00" muffler with a 2.50" resonator. What size is your exhaust pipe? If the piping is 3.00" (unless you're boosted) a 3.00" exhaust pipe is probably overkill. The removal of the cats and the upgraded exhaust prior to the muffler, in my opinion, are the main contributors to the rasp that you're experiencing. These items can be a bit more personalized towards racing applications where drone, rasp, tone, volume, etc. are of no concern, but on a street application or DD can be unnerving. A resonator's main job is to defeat drone, a welcome side effect can be a slight reduction in tone and rasp. If you didn't want to reduce the current exhaust piping to 2.50" then I would recommend the more unconventional 2 muffler method.

    - Jason @ Flowmaster
     
  4. Sep 19, 2018 at 11:15 PM
    #4
    Blue2010

    Blue2010 [OP] Active Member

    Joined:
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    Male
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    2013 tacoma double cab sport 4x4
    My exhaust pipe size is 2.5”

    Should I still go with the 2 muffler method?
     
  5. Sep 20, 2018 at 7:42 AM
    #5
    Yota31

    Yota31 Well-Known Member

    Joined:
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    Shannon
    Vehicle:
    Lifted 2006 Trd Sport Tacoma
    Led Tailights, OEM roofrack, 3 inch lift, Halo light bar and Black Wheels
    I have a 2006 Tacoma 4.0 with an electric exhaust cut out in it. When it's closed no rasp at all going through 1 flowmeter muffler. Now when the cut out is open and I get on it it becomes very raspy so I believe it's because the resonators create rasp and the muffler kinda takes care of the rasp. I'd say cut out the resonators. I'm wanting to do it on my truck but haven't gotten around to doing it
     

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