Announcement Announcement Module
Collapse
No announcement yet.
cheap exhaust mods Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts

  • #31
    An exhaust shop should be willing to try a few muffler to get the desired noise level, or at least they should already know what to try.

    There are so many mufflers on the market of different quality and design, obviously a cannon type muffler will be the loudest being a straight through design with not much noise absorbent packing in them, so maybe look at something similar to the offset design of the stock muffler, but with a better flowing internal design. The Lukey and Magnaflow mufflers that the RPW exhausts use are reputable brands and quality mufflers, and they aren't too loud from what I've heard on some of the guys colts, then again they also ran the supplied hi-flo resonators as well.

    You should really use both in combination as suggested by their names they provide separate functions, one to reduce noise emissions, the other to reduce resonance in the exhaust. I removed the resonator on one of my previous rides, plus ran a supertrapp muffler to try and shut the thing up, but the resonance from the exhaust was so annoying that it used to make my ears pop at certain rpm - lesson learnt!

    Comment


    • #32
      RPW says this about the stock exhaust:-

      1.Twin cat converter set-up, the primary cat converter being part of the front pipe section with a 1 3/4" diameter pipe work, the second cat converter utilising a 2 1/4" diameter pipe work
      2.The pipe work from the 2nd cat converter, located halfway up the vehicle, is a 2 1/4" diameter unit with a large resonator and tri flow muffler design
      3.The stock system, between the factory resonator and rear muffler, is restricted back down again at a flange join back to 1 3/4" pipe diameter.

      Judging by what RPW has said I think if I start at the front pipe and replace it with a 2 1/4 and a single sports cat and reconnect before the factory resonator it should remove a lot of the restriction and only cost a $400ish

      Comment


      • #33
        Yeh most factory systems will have a fairly restrictive first Cat.
        When I did my exhaust (RPW) the better flowing front pipe had the biggest noticable difference. Don't forget you'll get CEL if you increase flow too much over stock on an 'unflashed' car, especially if you remove the 2nd oxy sensor.

        Comment


        • #34
          Originally posted by odysseyesm View Post
          Yeh most factory systems will have a fairly restrictive first Cat.
          When I did my exhaust (RPW) the better flowing front pipe had the biggest noticable difference. Don't forget you'll get CEL if you increase flow too much over stock on an 'unflashed' car, especially if you remove the 2nd oxy sensor.
          I'm paying a visit to Macca soon to sort out the reflashing:-)

          Will the car pass emissions with only the 2nd cat if I only removed the 1st?
          Last edited by Bobster; 23-02-2012, 01:05 PM.

          Comment


          • #35
            Originally posted by ELEGNT
            use an oxy sensor spacer on the 2nd oxy to overcome that
            Flash is cheaper and easer

            Comment


            • #36
              I got quoted $350 to fit a Lukey mild-steel rear muffler, as well as replacing the short restrictive piping over the rear axle to a slighly bigger diameter pipe. Is this quote expensive or about average price?

              Comment


              • #37
                Sounds fair to me, got to take labour into account as well.

                Comment


                • #38
                  Motivation here I come , I will do a 2.5 " Mild Steel pipe including the Downpipe till the Muffler, No emission restrictions here so out with all CAT's.Cant wait :-)

                  Comment


                  • #39
                    just got my exhaust done. 2.5" stainless steel mandrel bent system from turbo back, also fitted rpw dump pipe. go's really good , first cat is hallowed out and then running high flow as a second cat, no muffler sounds cool . can show brisbane guys at the meets . i have 4 m of stainless steel tubing for anyone in brisbane wanting to get their exhaust done for sale. from what ive heard stainless is just so much better then mild the sound is more crisp and they present different notes according to my fabricator + its bling factor and yeah also mild rust where as stainless doesn't

                    Comment


                    • #40
                      Can anyone strongly recommend in Sydney the best and inexpensive exhaust specialist I did ring Liverpool exhaust,got quoted $1400 from dump? Any help appreciated?

                      Comment

                      Working...
                      X