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Induction Noise Change At Top Of Rev Range

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    Induction Noise Change At Top Of Rev Range

    I have noticed that my induction noise seems to get a fair bit deeper as it hits the last 3-400 rpm of the rev range before the led shift lights light up.

    Is this correct or do I have an issue - the car pulls through the revs fine.

    Kp

    #2
    I'm pretty sure mine does this also. Normal i would think.

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      #3
      Originally posted by kpkpkp
      I have noticed that my induction noise seems to get a fair bit deeper as it hits the last 3-400 rpm of the rev range before the led shift lights light up.

      Is this correct or do I have an issue - the car pulls through the revs fine.

      Kp
      are you flapless?

      Comment


        #4
        Originally posted by kpkpkp
        I have noticed that my induction noise seems to get a fair bit deeper as it hits the last 3-400 rpm of the rev range before the led shift lights light up.

        Is this correct or do I have an issue - the car pulls through the revs fine.

        Kp
        Mine does the same (airbox flap installed & working)

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          #5
          Sounds normal to me mate.

          Comment


            #6
            It's normal, it's just where the engine takes on more load for want of a better way of describing it I think

            I'm also pretty sure mine does it, I have the flap installed and working, flap opens at 3k in sport and 6.2k in 'normal' mode I think doesn't it?

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              #7
              Later in Sport I would have though, 3400 or 4000 even

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                #8
                What difference does removing the flap make?

                Kp

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                  #9
                  Originally posted by kpkpkp View Post
                  What difference does removing the flap make?

                  Kp
                  Earlier RPM Induction noise with no option to have it on or off when activating Sport. I personally like to have the choice, so I kept mine on. + keeps the spiders out when stationary.

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                    #10
                    I thought that was the case. Might give it a go.

                    Kp

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                      #11
                      Originally posted by kpkpkp View Post
                      What difference does removing the flap make?

                      Kp
                      Noise all the time without turning sport on.:drool::drool:

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                        #12
                        Originally posted by kpkpkp View Post
                        I thought that was the case. Might give it a go.

                        Kp

                        Sounds like the henweigh to me, I had this on a customers car last year, was expensive to sort though.

                        Comment


                          #13
                          Originally posted by kpkpkp View Post
                          I thought that was the case. Might give it a go.

                          Kp
                          Have a read of this before you decide.

                          AS QUOTED FROM NORTHLOOP "If you need any bmw inside info let me know as my best mate works for BMW and has had to replace 2 engines in CSL's now due to people removing the flap from the air intake, causing the head gasket to go!" What do you reckon I only down side to removing the flap allows water up the air

                          Comment


                            #14
                            Originally posted by $w!ft View Post
                            Later in Sport I would have though, 3400 or 4000 even
                            I think is about 4500 rpm with SPORT button on :thumbs: and about 7000rpm with SPORT button off :whistle:

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                              #15
                              Originally posted by mattCSLnut View Post
                              I think is about 4500 rpm with SPORT button on :thumbs: and about 7000rpm with SPORT button off :whistle:

                              does anybody here OWN a CSL? :hahaha:

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