24v - Vibrant muffler = Me not happy

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  • Jand3rson
    Banned
    • Oct 2003
    • 37587

    #61
    Originally posted by FredK
    It is not amplifying the sound. It is harder to damp the sound as efficiently. By sizing pipe smaller, you make it easier to quiet down an exhaust system from a geometry standpoint--that is, the smaller the piping is, the easier it is to quiet down a system by using smaller mufflers/resonators. So if you have a 3" exhaust, you must choose larger mufflers.
    What I meant to say, just came out wrong. The larger piping is still a large part of the reason for it being louder.

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    • Massakista77
      Advanced Member
      • Oct 2011
      • 118

      #62
      Funny I have Ireland engineering shorties > y pipe > magnaflow cat > 22" resonator > vibrant stealth muffler. I love it not raspy at all no highway drone and goes from deep growl low rpms to a nice sound at high rpms. I have single 2.5 inch piping.

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      • nando
        Moderator
        • Nov 2003
        • 34827

        #63
        Originally posted by Hugo Stiglitz
        In bold is part of your loudness problem. No need for 3" piping on an NA motor. It's actually amplifying the sound.


        It was done at the same shop here in Bend that does all of my PC work. I don't know the temp specs, I could probably find out. I considered JetHot, but the shipping hassles turned me off. It was much easier to find a place locally. Cost was about $14/ft.
        nah. it's because there is only 1 muffler. even a 2.5" with 1 muffler is going to be loud.
        Build thread

        Bimmerlabs

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        • e30polak
          R3V OG
          • Nov 2006
          • 6136

          #64
          Originally posted by nando
          nah. it's because there is only 1 muffler. even a 2.5" with 1 muffler is going to be loud.
          This. When I initially switched to single 2.5" I put a 14" Glasspack, straight to the Vibrant, and it was MUCH louder then my dual muffler set-up. I left it like that for a week before putting the Borla in the middle.
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          • Jand3rson
            Banned
            • Oct 2003
            • 37587

            #65
            Gotcha. Still trying to learn the details and the specifics of exhaust systems.

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            • TimKninja
              R3VLimited
              • Mar 2009
              • 2131

              #66
              Just thought I'd bump this.

              Put the Borla ProXs to Vibrant street power on my car last night. 2.5 inch diameter. S50 .

              It sounds so glorious , but it is loud. Not alot of droning. But it's loud .itll be a cop magnet if your not careful.
              1985 325e M50TU(Sold)
              1991 318is Slicktop (Sold)
              1990 325is Brilliantrot S50/5 Lug Swapped.
              1992 525i Manual shitbox Winter Beater

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              • mtlbloodshot
                Mod Crazy
                • Jul 2011
                • 761

                #67
                Is it very common for 24v to have two mufflers inline instead of a res or cat before?


                MY BUILD THREAD
                http://www.r3vlimited.com/board/showthread.php?t=235231

                INSTAGRAM : @luchcolaneri

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                • johnjohnsons54
                  Wrencher
                  • Mar 2012
                  • 228

                  #68
                  I just ordered some parts for my S52 the other day.

                  From the headers back I'm going with no cats and 2.5 in piping....

                  Vibrant Ultraquiet Resonator>>Borla ProXS>>Megan M-DT



                  I reeeeeeally want this to sound nice and deep/throaty with minimal rasp.

                  Fingers crossed that it will sound good. Clips will be posted as soon as she's done

                  ZF320 | M50 Mani | TRM + 21.5lb Injectors + 3.5in MAF | E36 M3 Rack/Driveshaft | Megan Coilovers | 002R/452's
                  In the works: UUC Evo 3/DSSR, JB Racing lightweight Flywheel, Shrick cams, BBK (yet to be determined)
                  I NEED A WINGLESS AW TRUNK LID PLEASE PM ME IF YOU HAVE ONE!

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