G-8VXWWTRHPN dual valve springs in 2.0 8v - VWWatercooled Australia

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dual valve springs in 2.0 8v

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  • #1

    dual valve springs in 2.0 8v

    Hi guys I have a bit of a problem at the moment.

    I'm converting my 2.0 8v head to dual valve springs. I have set of autotech HD valve springs and diesel spring seats I was planning on using.

    problem is my spring seats or even the springs themselves won't fit in the head where the original springs sat.

    No one down here can machine the head a bit so the valve seats can sit
    in.

    Anyone experienced this problem?

    Need help

    Cheers
    2000 SAAB 9-5 Aero - Stage 2. 275hp 420Nm, Brew City Boost
    1986 SAAB 900 Turbo 16 S
    Tags: None
  • #2
    What kind of cam are you using ?
    Bug_racer supports the rebellion of the euro revolution

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    • #3
      Plan on running schrick 276 on twin 40 webers
      2000 SAAB 9-5 Aero - Stage 2. 275hp 420Nm, Brew City Boost
      1986 SAAB 900 Turbo 16 S

      Comment

      • #4
        Whats the rest of your valve train consist of ?
        Bug_racer supports the rebellion of the euro revolution

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        • #5
          16v retainers, standard 8v valves, collets, buckets... New guides seals etc
          2000 SAAB 9-5 Aero - Stage 2. 275hp 420Nm, Brew City Boost
          1986 SAAB 900 Turbo 16 S

          Comment

          • #6
            Originally posted by tassie_euro_mk1 View Post
            16v retainers, standard 8v valves, collets, buckets... New guides seals etc
            This is just my opinion , Im sure there are guys more knowledgable in this engine than me .

            276 cams with standard valves is too big . You need to match the valve size with cam specs . Id opt for 1mm oversize valves and a flowed head . 268 cams would be about the biggest I would use with stock valves . Remember its not just about lift and duration but flow as well !

            If your serious in still running the 276 then lighten all your valvetrain components . Titanium retainers , collets , lightweight lifters . This will lower the weight of the valvetrain and require less force from the valve spring to close it at higher rpm . The reason for dual valve springs over single is to stop valve bounce/float . Running higher spring pressure wears out your cam lobes faster . My guess with your carby size , cam etc your not going to make much power over 6500 rpm so singles should still be fine . What venturi size have you worked out based upon head flow with the carbies ?
            Last edited by Bug_racer; 01-08-2012, 10:32 AM. Reason: spelling
            Bug_racer supports the rebellion of the euro revolution

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            • #7
              Thanks mate. Yea I've decided to stick with a 268 cam in the 2.0 head for now and save the lightweight gear for a flowed 1.8 head.

              I have two sets of chokes. A 34 set and a 36. Most likely using 34 as that is what the jets will be set around
              2000 SAAB 9-5 Aero - Stage 2. 275hp 420Nm, Brew City Boost
              1986 SAAB 900 Turbo 16 S

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