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boost issue

Posted by crazyquik22023, Mar 29, 2010

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  1. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    I had another thread on this but never resolved it. My car doesn't want to boost past 20 psi. My hallman MBC is turned all the way up and i have a tial 44mm with a 1.1 bar spring. Now if i'm not mistaken shouldn't my car be able to easily boost up to 30+ psi with this spring?? I haven't tried running the wastegate yet w/o the boost controller connected but what else could cause this problem? could it be my greddy type s bov with the stock spring?? idk let me know what u guys think. oh and also i have a pte 6262.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  2. kenuwine4g63

    kenuwine4g63 Proven Member

    474
    31
    Joined May 26, 2009
    Charlotte, North Carolina
    I thought 1 bar was equivalent to 17psi...
     
    kenuwine4g63

    441  0

    1995 Mitsubishi Eclipse GST
    000.0 whp · 000.0 lb/ft · 2G DSM
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  3. Hitmachine101

    Hitmachine101 Proven Member

    349
    1
    Joined Nov 16, 2009
    Rochester NY, New York
    1 bar is 14.7 psi i think and if your spring is 1.1 bar then you can double that so your correct 30psi should be able to be obtained

    do a boast leak test to see if your BOV is indeed leaking -- i wouldnt think that BOV would start to leak till at least 25psi but i may be wrong

    if your boost leak test comes back fine then id look into that wastegate
     
  4. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    i did a boost leak test and it holds up to 40psi with w/o the boost controller connected and the wastegate is brand new so i doubt that is the problem... but im going to try to run the wastegate with an open side port tom. and see if that does anything b/c i think my MBC might be bad..
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  5. DSMDriver69

    DSMDriver69 Proven Member

    440
    0
    Joined Oct 18, 2009
    Overland Park, Kansas
    if a blt came up neg, i would look into fule and then management.it sounds like a bov leak, which if it big enough will throw u off.
     

    401  0

    1998 Mitsubishi Eclipse GST
    · 2G DSM
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  6. Hitmachine101

    Hitmachine101 Proven Member

    349
    1
    Joined Nov 16, 2009
    Rochester NY, New York
    sounds like it s pointing to your MBC -- if the wastegate is brand new then maybe its faulty but looks like a MBC
     
  7. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    its not getting fuel cut or anything and its tuned pretty good, and ya it might be a bov leak

    ya im leaning towards the MBC, ill do some more test and check back
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  8. shinzon

    shinzon Proven Member

    276
    56
    Joined Sep 11, 2006
    St. Petersburg, Florida
    Do you have your mbc hooked up to the BOV vacuum line? This can cause your BOV to act erratically. You're better off with a pressure source near the turbo compressor outlet.
     

    1K  2

    1996 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    564  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM
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  9. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    ugh no, i def have it hooked up to the compressor housing
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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