Exhaust note with 7A Ex Cam?

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  • newsh
    S2Forum Obsessed
    • Aug 2003
    • 16226
    • Country: United Kingdom

    #1

    Exhaust note with 7A Ex Cam?

    My exhaust note seems to have changed since fitting the 7A ex cam, a little louder and fruitier I'd say, bit more of a burble.. Well thats the best description I can come up with.. Anyone else noticed this when fitting the 7A cam?

    S2 Coupe 3B Project


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  • dkw_dude
    S2Forum Maniac
    • Jul 2003
    • 555
    • Country: Norway

    #2
    A little o.t. but did you notice any difference after installing the cam? (I have a 7A ex cam on the shelf myself, RS2 setup on the car)
    Cheers and Merry Christmas
    Leif-Helge
    Leif-Helge
    -91 S2 VEMS and Comp Turbo
    -12 B** 530XD Touring "S2 parts transporter, and daily driver"

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    • newsh
      S2Forum Obsessed
      • Aug 2003
      • 16226
      • Country: United Kingdom

      #3
      Originally posted by dkw_dude
      A little o.t. but did you notice any difference after installing the cam? (I have a 7A ex cam on the shelf myself, RS2 setup on the car)
      Cheers and Merry Christmas
      Leif-Helge
      Difficult to say as the head was changed at the same time but I'd say it felt stronger and seems to rev out a bit better, the stock downpipe is now the bottleneck.

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      • dkw_dude
        S2Forum Maniac
        • Jul 2003
        • 555
        • Country: Norway

        #4
        Originally posted by newsh
        Difficult to say as the head was changed at the same time but I'd say it felt stronger and seems to rev out a bit better, the stock downpipe is now the bottleneck.
        Ok thanks, will post reply regarding ex note when I have installed my 7A ex cam (may take a while as I am moving from a flat to a house, so I will have to spend less time on cars ) .
        I have 3" from turbo so it should flow nicely.
        Leif-Helge
        -91 S2 VEMS and Comp Turbo
        -12 B** 530XD Touring "S2 parts transporter, and daily driver"

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        • dan_b
          S2Forum Possessed
          • Sep 2003
          • 3670
          • Home: United Kingdom Current: England

          #5
          Newsh, did you get a re-map at MRC with the 7A going in?
          I was surprised at how different the engine/ exhaust note was with your car vs. mine (whoops, Robatron's!) with the RS2 turbo/ manifold, was a lower overall tone to the engine vs. the k24, so I can quite believe that the different cam would change the sound a bit.

          How's it driving now?

          I'm still mulling over getting mine re-mapped, maybe I should drop some cams in at the same time. Oh dear, the Dark Side never leaves does it!
          Ex S2 owner, now running around in an A4 Avant quattro...

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          • newsh
            S2Forum Obsessed
            • Aug 2003
            • 16226
            • Country: United Kingdom

            #6
            Dan_b, yes I'ts been remapped for the Cam, RS2 airbox, BMC filter and bearing in mind the steel rods Its running enough boost to make the injector O rings leak
            And it fair s
            Next up is a 3" exhaust, Mihnea says thats my restriction now.
            Last edited by newsh; 24 December 2006, 20:14.

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            • K7ERG
              S2Forum Extremist
              • Mar 2004
              • 1711
              • Country: Scotland

              #7
              I removed the downpipe and system. replaced with 3" and it made a huge difference. 35bhp and 40lb/ft. on standard boost.
              Audi A6 AEL 5cyl Quattro breaking.
              Audi A5 3.0tdi Quattro Stage 2
              07947385043

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              • newsh
                S2Forum Obsessed
                • Aug 2003
                • 16226
                • Country: United Kingdom

                #8
                Originally posted by K7ERG
                I removed the downpipe and system. replaced with 3" and it made a huge difference. 35bhp and 40lb/ft. on standard boost.
                Wow! Better get that 3" system ordered then!

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                • K7ERG
                  S2Forum Extremist
                  • Mar 2004
                  • 1711
                  • Country: Scotland

                  #9
                  That was saying the engine was sitting on standard power before on normal unleaded.
                  Just a cold air feed and cone filter with exhaust. Engine has covered 190000+miles now.
                  265bhp cant remember the torque.

                  Dastek rolling road which was used.

                  Mind its a AAN engine.

                  3" from turbo no cars and one box. Mandrel bends.
                  Audi A6 AEL 5cyl Quattro breaking.
                  Audi A5 3.0tdi Quattro Stage 2
                  07947385043

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                  • Acidburn
                    S2Forum Obsessed
                    • Jun 2007
                    • 13459
                    • Country: United Kingdom

                    #10
                    Originally posted by newsh
                    Dan_b, yes I'ts been remapped for the Cam, RS2 airbox, BMC filter and bearing in mind the steel rods Its running enough boost to make the injector O rings leak
                    And it fair s
                    Next up is a 3" exhaust, Mihnea says thats my restriction now.
                    Can you get uprated injector O rings?

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                    • K7ERG
                      S2Forum Extremist
                      • Mar 2004
                      • 1711
                      • Country: Scotland

                      #11
                      I would just replace with new o-rings.

                      What boost is it running?

                      craig
                      Audi A6 AEL 5cyl Quattro breaking.
                      Audi A5 3.0tdi Quattro Stage 2
                      07947385043

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                      • Acidburn
                        S2Forum Obsessed
                        • Jun 2007
                        • 13459
                        • Country: United Kingdom

                        #12
                        From what i've heard of cars running the 7a exhaust cam is around the 1500-2000 mark you get a sort of off beat thrum to the sound/note from the engine, might just be on big boost cars tho. Sounds nice.

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                        • newsh
                          S2Forum Obsessed
                          • Aug 2003
                          • 16226
                          • Country: United Kingdom

                          #13
                          Yeah, it sounds nice, and yes I just fitted new O-rings.

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                          • Acidburn
                            S2Forum Obsessed
                            • Jun 2007
                            • 13459
                            • Country: United Kingdom

                            #14
                            What sort of power you running now?

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                            • newsh
                              S2Forum Obsessed
                              • Aug 2003
                              • 16226
                              • Country: United Kingdom

                              #15
                              Originally posted by Acidburn
                              What sort of power you running now?
                              I would guess around 360-370?

                              S2 Coupe 3B Project


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