Cat cams

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  • Bram
    S2Forum Fiend
    • Aug 2006
    • 2582
    • Country: Netherlands

    #16
    So Paul should adjust his Excel again for correctness, since that will be THE standard for us now

    Comment

    • repo
      S2Forum Maniac
      • Dec 2004
      • 893
      • Country: Finland

      #17
      You cannot have +2mm lift at TDC without intake valves hitting the pistons, in case You have OE ones.

      Also, ridiculous pair. Wonder where those are ment for. 2mm intake and 0,4mm ex open at TDC... big nono here.

      Furthermore, what kind of package do You have, if You need hard cams?
      Everything less than 2 bar is considered to be naturally aspirated

      Comment

      • Audi_CQ
        S2Forum Maniac
        • Mar 2004
        • 940
        • Country: Norway

        #18
        Originally posted by bram
        So Paul should adjust his Excel again for correctness, since that will be THE standard for us now
        Nice if someone else could measure a set to confirm it
        Also look at this:


        Can be typing error or.....? Only way to be sure is to have someone else to measure a set

        Comment

        • S2central.net
          Retired OG Mod
          • Jul 2003
          • 16590
          • Country: Northern Ireland

          #19
          I have both 7A cams sitting on the shelf - damn hard to measure like that unless I get very creative (or temporarily fit them to my spare head if its clean enough).
          If Audi_CQ is right that sure makes a big difference to 7A inlet... Curiously it would line up with duration of the NM inlet.

          I have Audi/Erwin data and Bentley data for the 7A which says 6 BTDC - wouldn't be the 1st time there is a mistake in the manuals though !


          Paul
          Paul Nugent
          Webmaster http://S2central.net
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          1994 S2 Coupe ABY - aka Project Lazarus
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          Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

          There are only 10 kinds of people that understand binary - those that do, and those that don't

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

            #20
            I have measured the 7As too and openig time of inlet is 6deg AFTER TDC !
            [__]=oooo=[__]

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