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VZ Exhaust Help???

Discussion in 'VZ Holden Commodore (2004 - 2006)' started by disco78, Mar 18, 2011.

  1. disco78

    disco78 New Member

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    I've got the VZ thunder 6 liter, Automatic
    Had exhaust bros do the cats back and put two pipes out the back with dual tips to look like the VE's. But I get a terrible drone noise in the cabin when the car is under load but not high revs. Any ideas how to make it get a good note but no drone noise???
    Cheers
     
  2. richardpalinkas

    richardpalinkas Blown Alloytec

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    drone is the note at which the exhaust pipe resonates. only way to change the drone is to change the characteristics of the pipe, whether that be shortening/ lengthening the pipe, reducing or expanding pipe sizes etc. my guess is that it has no rear muffler? if thats the case, maybe add some hotdogs to the back, or a muffler.
     
  3. disco78

    disco78 New Member

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    Thanks.
    It has a little hot dog muffler on the back, I've received a quote to put a bigger muffler on the back but I think that might reduce the note of the car. I was hoping to keep a little bit of that V8 sound.
    Any ideas on how to get a great note but not the drone?
     
  4. richardpalinkas

    richardpalinkas Blown Alloytec

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    what system is it?custom or off the shelf? twin 2.5 or twin 3?
     
  5. disco78

    disco78 New Member

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    I believe it's custom 2.5 inch
     

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