Egt in exhuast

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  • Nuno_Cristiano
    S2Forum Fanatic
    • Dec 2015
    • 77
    • Country: United Kingdom

    #16
    What EGT ( pre-turbo ) temperature yours measure with 7A cams using original timing?
    .: Audi Coupe Quattro 20V 91' :.
    .: Audi/PorscheRS2 95' :.
    .: Mitsubishi 3000GT VR-4 96' :.

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    • blackS2
      S2Forum Addict
      • Apr 2010
      • 455
      • Country: Germany

      #17
      Originally posted by Nuno_Cristiano
      What EGT ( pre-turbo ) temperature yours measure with 7A cams using original timing?
      depends on ignition timing 960-985 deg C
      [__]=oooo=[__]

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      • Tom_
        S2Forum Extremist
        • Oct 2007
        • 1302
        • Country: Czech Republic

        #18
        What about fitting EGT K coupler into #1 cylinder close to collector? As i think #1 have biggest worn and temperature.
        Audi Coupe Quattro 2.3 20V

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        • A80Avant
          S2Forum Obsessed
          • Sep 2005
          • 10873
          • Country: Greece

          #19
          I always thought it was the cyl 3 having the highest temperature being in the middle

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          • Cordoba16vt
            S2Forum Enthusiast
            • Apr 2014
            • 182
            • Country: Bulgaria

            #20
            No 5 is the hottest , coolant flange being there - coolant takes away heat from cylinders 1 2 3 4 and gets quite hot by the time it reaches No 5 .

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            • Thuppu
              S2Forum Freak
              • Sep 2010
              • 4115
              • Country: Finland

              #21
              I don't see any point in putting the egt sensor in just one runner..?

              Audi UrS4 Avant 2.5 20vt - twincharged - Project
              Audi 80q B4 Sedan 2.2 20vt - Daily user
              BMW 320d Touring e91 M-Sport - Daily user
              BMW 740iA e38 - Project

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              • s0_big
                S2Forum Maniac
                • Dec 2009
                • 685
                • Country: Sweden

                #22
                I have constant measurement in each runner. What i can see from my logs is that cyl nr 4 is almost always the hottest one during hard pulls. Could be a measurement fault.
                Here is a picture from my log file, EGT 1 is cyl 1 and so on. Sensors sits in the middle of the runners.

                EGT measurement .jpg20150208_150342.jpg




                Attached Files

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                • A80Avant
                  S2Forum Obsessed
                  • Sep 2005
                  • 10873
                  • Country: Greece

                  #23
                  Originally posted by s0_big
                  I have constant measurement in each runner. What i can see from my logs is that cyl nr 4 is almost always the hottest one during hard pulls. Could be a measurement fault.
                  Here is a picture from my log file, EGT 1 is cyl 1 and so on. Sensors sits in the middle of the runners.

                  EGT measurement .jpg20150208_150342.jpg



                  Cylinder EGT is also related to the type of exhaust manifold. If number 4 is the one before last on the right, looking at the bends there the slightly higher temperature may be due to that.

                  My point about cyl3 being the hottest was from my mechanic having suggested in the past that as it sits in the middle of the 5 cylindes on the block it seems to be the one needing rebore the earliest. I
                  May be wrong of course

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