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  • 20v Camshaft ( cam ) durations inlet and exhaust

    Can someone please tell me the duration on the 7a cams?
    Been trying to search but what i can find are different answers.
    Audi RS4+Long sportquattro
    www.hansenmotorsport.no

  • #2
    All data of 20v cams..

    In
    AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
    ADU__________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
    NM __________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
    7A___________ Opens 6° BTDC, closes 38° ABDC, duration 224°, lift 9,6mm

    Ex
    AAN, ABY, 3B___ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
    ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
    NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
    7A___________ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 10,5mm

    Comment


    • #3
      Originally posted by nilshenr View Post
      All data of 20v cams..

      In
      AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
      ADU__________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
      NM __________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
      7A___________ Opens 6° BTDC, closes 38° ABDC, duration 224°, lift 9,6mm

      Ex
      AAN, ABY, 3B___ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
      ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
      NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
      7A___________ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 10,5mm
      Thanks Nils. You are now officially what we call a GURU
      Audi RS4+Long sportquattro
      www.hansenmotorsport.no

      Comment


      • #4
        AAN, ABY and 3B-turbo.

        7A, NM-normally aspirated.

        ADU-?

        I should know by now!
        Carlos.

        On the look out for less bits for my s2 saloon project. Now supporting myself by shooting for my food. www.airgunforum.co.uk

        Comment


        • #5
          Adu = RS2
          2001 Avus Silver B5 RS4.
          2004 A4 Avant 1.8T quattro Sport-LE.
          1995 S2 Coupe - sold (sniff)

          Comment


          • #6
            I have different info on 7A exhaust cam in that it closes later at 3 degrees before TDC not 9 deg as per 3B cam. Everything else spot on.
            1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
            2004 A4 2.5TDi convertible, re-mapped to 180bhp
            2011 A5 sportback 3TDi-Backbox delete, remap

            Comment


            • #7
              I agree, the Bentley quotes :-

              Exhaust closes 3 degrees BTDC.

              Can we get the above table edited?
              Carlos.

              On the look out for less bits for my s2 saloon project. Now supporting myself by shooting for my food. www.airgunforum.co.uk

              Comment


              • #8
                Originally posted by nilshenr View Post
                All data of 20v cams..

                In
                AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
                ADU__________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
                NM __________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
                7A___________ Opens 6° BTDC, closes 38° ABDC, duration 224°, lift 9,6mm

                Ex
                AAN, ABY, 3B___ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
                ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
                NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
                7A___________ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 10,5mm
                Thought I'd share the rally car cam data now that I've found the printout. These were one off bespoke cams for my Tarmac stage rally car made by Piper.

                Inlet _________Opens 22° BTDC, closes 62° ABDC, duration 264°, lift 10.87mm
                Exhaust ______Opens 57° BBDC, closes 17° BTDC, duration 254°, lift 10.17mm
                sigpic
                Pembo
                quattro - Original 4WD rallying
                Rally Car photos

                Comment


                • #9
                  Originally posted by Pembo View Post
                  Thought I'd share the rally car cam data now that I've found the printout. These were one off bespoke cams for my Tarmac stage rally car made by Piper.

                  Inlet _________Opens 22° BTDC, closes 62° ABDC, duration 264°, lift 10.87mm
                  Exhaust ______Opens 57° BBDC, closes 17° BTDC, duration 254°, lift 10.17mm
                  AND THE audi s1 pikes peak camdata anyone or other rally/ race audi cam data.....

                  Comment


                  • #10
                    Redone info

                    Inlet

                    AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
                    ADU___________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
                    NM ___________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
                    7A____________ Opens 6° BTDC, closes 38° ABDC, duration 224°, lift 9,6mm
                    Rally Piper______ Opens 22° BTDC, closes 62° ABDC, duration 264°, lift 10.87mm

                    Exhaust

                    AAN, ABY, 3B__ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
                    ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
                    NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
                    7A___________ Opens 42° BBDC, closes 3° BTDC, duration 207°, lift 10,5mm
                    Rally Piper_____ Opens 57° BBDC, closes 17° ATDC, duration 254°, lift 10.17mm
                    Last edited by Jamo; 6 October 2007, 21:13.

                    Comment


                    • #11
                      One error I guess: Rally Piper ex should be closes at 17 ATDC (57+17+180 = 254)
                      If 17 BTDC its a 220° cam (57-17+180 = 220)

                      Comment


                      • #12
                        Originally posted by breitling View Post
                        Can someone please tell me the duration on the 7a cams?
                        Been trying to search but what i can find are different answers.
                        http://www.s2forum.com/forum/showthread.php?t=26074

                        Comment


                        • #13
                          Last edited by Albert; 30 December 2007, 14:39.
                          AKmotorsport.net - Manufacturing Motorsport parts that do the job. | Audi S2 on Facebook | Best way of reaching me is sending email to albert@akmotorsport.net

                          Comment


                          • #14
                            Update on 7A cam data:

                            I've posted in an earlier thread that when measuring 7A cams I found that numbers for inlet cam also was wrong. Measured a friends setup today and 7A cams is as follows:

                            Inlet:
                            Opens 6° AFTER(not before) TDC, closes 38° ABDC, duration 212°, lift 9,6mm.
                            Ex.
                            Opens 42° BBDC, closes 3° BTDC, duration 219°, lift 10,3mm

                            Also found this on the Norwegian VAG club forum:

                            3B/RR/ABY/AAN Steuerzeiten:
                            * Einlass öffnet nach OT 3 Grad
                            * Einlass schließt nach UT 25 Grad
                            * Auslass öffnet vor UT 42,2 Grad
                            * Auslass schließt vor OT 9,2 Grad
                            * Hub Einlass: 8,3mm
                            * Hub Auslass: 8,8mm

                            Steuerzeiten ADU:
                            * Einlass öffnet nach OT 13 Grad
                            * Einlass schließt nach UT 35 Grad
                            * Auslass öffnet vor UT 24 Grad
                            * Auslass schließt vor OT 1 Grad
                            * Hub Einlass: 8,3mm
                            * Hub Auslass: 9,5mm

                            Steuerzeiten 7A:
                            * Einlass öffnet nach OT 6 Grad
                            * Einlass schließt nach UT 38 Grad
                            * Auslass öffnet vor UT 42 Grad
                            * Auslass schließt vor OT 3 Grad
                            * Hub Einlass: 10,2mm
                            * Hub Auslass: 9,6mm

                            So 7A inlet isn't so much different from the turbo cams

                            Cheers,
                            Roger

                            Comment


                            • #15
                              Very well done that man...

                              Lets hope it was just a 'typo' in the Bentley.

                              Or do we need to confirm the data for the other cams with a real world check and not just believe the books!
                              Carlos.

                              On the look out for less bits for my s2 saloon project. Now supporting myself by shooting for my food. www.airgunforum.co.uk

                              Comment

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