What is Max Safe Boost Pressure?

Discussion in 'VW Mk3 Jetta, Passat TDI and other/older diesels' started by dubber2000, Jan 13, 2011.

  1. dubber2000

    dubber2000 New Member

    Joined:
    Jan 12, 2011
    Messages:
    7
    Car:
    2006 Jetta
    What is the max safe boost pressure on my 96 Passat TDI?
    In the cold weather it will do 20psi, but generally tops out at around 17psi.
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  2. audi1z

    audi1z Member

    Joined:
    Oct 16, 2010
    Messages:
    251
    Car:
    Audi 80 1Z Engine
    Hi,
    which engine do you have?
    Cheers
  3. dubber2000

    dubber2000 New Member

    Joined:
    Jan 12, 2011
    Messages:
    7
    Car:
    2006 Jetta
    It's the 1Z engine
  4. audi1z

    audi1z Member

    Joined:
    Oct 16, 2010
    Messages:
    251
    Car:
    Audi 80 1Z Engine
    Hi,
    both values should be too high. My manual (1Z engine) identifies a limit of 2050 mbar absolute pressure, equivalent to 15 psi relative to ambient pressure.
    Regards
  5. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
    May 23, 2007
    Messages:
    21,929
    Car:
    2006 Jetta TDI
    Location:
    CT
    Are you chipped? 17 sustained sounds about right if modded but more boost alone shouldn't give more power. Are you on stock clutch? Modification history? My B4 Passat had some clutch slip in cold weather w/chip+nozzles.
  6. dubber2000

    dubber2000 New Member

    Joined:
    Jan 12, 2011
    Messages:
    7
    Car:
    2006 Jetta
    I did put a boost fooler on it

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