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    Thread: Old school boost controllers (no wastegates)

    1. Member
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      1979 Mk1 Scirocco
      01-28-2016 11:09 AM #1
      Hi all!
      I recently built a CIS stroked 1.8l 8v motor with a Rajay turbo set up. I have been trying to keep this build old school, I am using the Audi 5000 WUR, Volvo air meter.
      I am using a Impaco TC2 boost controller which restricts the volume of air to the engine under boost.

      As things progress I am finding that I don't like how the TC2 limits the engine speed. It creates a lot of heat and it is kind of annoying when the engine peaks out a 4000 rpm under boost.

      I have been looking into other boost controller systems such as blow off vales, trying to stick to 80s set ups.

      I will try to post some pics soon, does anyone have any experience with any of these set ups?

      http://www.turbosmartusa.com/

      https://books.google.com/books?id=pe...roller&f=false

    2. Geriatric Member need_a_VR6's Avatar
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      15 Jetta 92 Corrado VR6
      01-28-2016 01:53 PM #2
      There were wastegates in the early 80s.
      -Paul
      1992 Corrado - ALL MOTOR Drag Project
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning

    3. Member
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      1979 Mk1 Scirocco
      01-28-2016 03:12 PM #3
      good to know.
      It is hard to find information on the older stuff.
      Most info out there is about the new and improved. It has been a struggle to even find info on the TC2

    4. Member NOTORIOUS VR's Avatar
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      D3 A8 4.2 - E36 Turbo
      01-28-2016 03:13 PM #4
      The TC2 looks like a horrible part. Why not use an old school external 80's Audi/Porsche WG if you want to keep it period correct and actually gain back a ton of performance something like a TC2 would leave on the table.
      SCHNELL ENGINEERING · BLOG · STANDALONE ECUS · TUNING · DYNO · WIRING · PARTS · VEMS

    5. Geriatric Member need_a_VR6's Avatar
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      15 Jetta 92 Corrado VR6
      01-28-2016 03:44 PM #5
      OG Callaway kits used Deltagates from what I remember.
      -Paul
      1992 Corrado - ALL MOTOR Drag Project
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning

    6. Member NOTORIOUS VR's Avatar
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      D3 A8 4.2 - E36 Turbo
      01-28-2016 04:19 PM #6
      ^^ Pretty sure they had casted/designed their own WG (at least at some point).

      Either way... lots of viable period correct options to go with.
      SCHNELL ENGINEERING · BLOG · STANDALONE ECUS · TUNING · DYNO · WIRING · PARTS · VEMS

    7. Member
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      1979 Mk1 Scirocco
      01-28-2016 04:36 PM #7
      Here is an idea of what I am working with for space.
      It would be nice to take it off of the manifold where that bolt is


      http://i1168.photobucket.com/albums/..._182005653.jpg

      I like the sound of the Audi/Porsche WG.
      One of the reasons I have used some of the parts I have is to stick to how VW might have built this.

    8. Geriatric Member need_a_VR6's Avatar
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      01-28-2016 04:42 PM #8
      That bolt location won't get good wastegate flow and you may have creep issues at high rpm. Depends on how high the manifold pressure gets.

      My callaway kit had the first design Deltagate with it, which I think was a later kit.
      -Paul
      1992 Corrado - ALL MOTOR Drag Project
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning

    9. Member chilledOUTmk1's Avatar
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      95' Jetta, 90' GLI
      02-02-2016 01:38 PM #9
      Blow off valves are not used for boost control.
      Those Rayjay turbos are designed to run without a wastegate.
      The Callaway setup has the wastegate all the way to one side. Highly doubt creep will be an issue with this setup.

    10. Member
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      1979 Mk1 Scirocco
      02-02-2016 02:12 PM #10
      I am hesitant to run it without any kind of fail safe. This motor is moving a lot of air, the turbo is producing 10 psi at 4000 rpm. I did not build with that much pressure in mind. I thought it would hit 6 or 7 tops

      Sent from my XT1080 using Tapatalk

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