Stock PSI on the 3B?

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  • meijerbrantm
    S2Forum Tinkerer
    • Apr 2008
    • 5
    • Country: United States

    #1

    Stock PSI on the 3B?

    I just finished a 3B swap in a coupe quattro, but I'm not sure it's running 100%. I read that it was 12psi but I'm getting a good solid 6psi. It's running good, but i'm not sure it's a limp mode at all. Any help would be appreciative.
  • s2_bo
    S2Forum Zealot
    • Oct 2005
    • 6067
    • Home: United Kingdom Current: France

    #2
    Yeah should be running 11.6psi for stock 3b software.

    Maybe you have a leak somewhere, sounds like its just running mechanical boost.
    91 S2 coupé - RIP
    98 S8 - Luxury barge

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    • 20Vcqdriver
      S2Forum Maniac
      • Jun 2007
      • 829
      • Country: United Kingdom

      #3
      3B boost

      Mine ran just under 0.7 bar (9.8psi), which I have been informed is in spec for a 3B, for some reason the 3B ran lower boost than the similar Ur 20v RR engine (0.85bar). 6 psi means it is in limp mode. Get the codes read. Where did you fit an intercooler? Had real problems with this on my Cq conversion. Going to water to air intercooler during next SORN period.
      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

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