0 Boost

Discussion in 'Technical' started by loud'n'proud, May 7, 2012.

  1. loud'n'proud

    loud'n'proud Challenge Accepted

    ok so may now what the problem is but just want to post up before i get home and have a play.

    idles fine, no hunting,
    drives but has 0 boost, like a very slow NA... almost -ve boost
    up at 5000rpm when you clutch in you can here the wind down like normal, release of air or such.

    ball bearing turbos which you can hear spin down after the car is off.


    Now there were a few vac lines off and what looks like put on wrong ie

    now question is could this be caused solely by vac leaks or vac lines going to the wrong points?
     
  2. a2zed

    a2zed Guest

    A few vac lines off wont give you no boost, low response yes, but turbos will still provide enough air to make positive pressure. Sounds more like a wastegate issue, ie wastegates open. What turbos? And did you check/set the wastegates?
     
  3. loud'n'proud

    loud'n'proud Challenge Accepted

    rebuild high flowed stock turbos,

    cant say we set or checked the wastegate, engine+ turbos as a whole came out of another car and was running perfectly, thus no change.
     
  4. a2zed

    a2zed Guest

    They wont be ball bearing then. Time to start checking for rags etc jammed in pipes and turbos. Just fyi, reason I dont think it is a vac leak, you say it doesnt hunt and runs ok otherwise, will need a massive leak to make no boost.

    If you have a fmic, you havent mixed up the piping?
     
  5. Chrispy

    Chrispy Pretentious Upstart

    That's my guess as Josh isn't too bright...





    :p
     
  6. loud'n'proud

    loud'n'proud Challenge Accepted

    hardie har lol

    fmic is fine, was on with the other engine and was boosting fine..

    took intake pipes off with the car running and can feel air being pumped through up to throttle bodies so id be iffy about a rag blocked. plus dont remember plugging any up with rags or anything being visible when we plumbed it back up


    oh they are ball bearings... ezzupturbo confirmed... we were told they were rebuilt stock highflows but they do have a badge on the side ill take a pic of later... can hear them rolling after it shuts down...
     
  7. a2zed

    a2zed Guest

    Get the boost leak tester out and fix the leaks. What hoses are on wrong?
     
  8. ezzupturbo

    ezzupturbo JDMAutomotive

    There deffinatly bb chra's
     
  9. loud'n'proud

    loud'n'proud Challenge Accepted

    egr was still in so some of them were missing, the line down to recurc was missing or plumped straight up to wastegates.... hard to see which was which
     
  10. michandy

    michandy Active Member

    what boost controller

    What boost controller are you running, manual or electronic?
    Maybe something there :confused:
     
  11. loud'n'proud

    loud'n'proud Challenge Accepted

    no boost controller installed atm.
     
  12. michandy

    michandy Active Member

    ok

    So refresh my memory, is it possitive pressure or vacuum that keeps the waste gates closed?
     
  13. ezzupturbo

    ezzupturbo JDMAutomotive

    big spring :)
     
  14. loud'n'proud

    loud'n'proud Challenge Accepted

    which means its hard core shut constantly... takes vac to open it... where as in this situation its constantly open yes?

    so if there is no vac line on the wastegates should it just over boost?
     
  15. ezzupturbo

    ezzupturbo JDMAutomotive

    you mean it takes boost to open it :D
     
  16. michandy

    michandy Active Member

    ok

    so no boost controller means it should just boost its t$ts off :rolleyes:
    you have plumbed the turbo's up properly haven't you?
     
  17. Jinxed

    Jinxed Moderator

    i vote epic boost leak....plenum not seated properly. or something similar.
     
  18. loud'n'proud

    loud'n'proud Challenge Accepted

    would have to be pretty epic but... like maassssiiivvvveee

    plenum was never off. egr could cause it maybe but doubt it


    na im saying as a test. if i just leave wastegates going no where they it shouldnt open meaning it should over boost yeah? since there is no boost to open it and release?
     
  19. Jinxed

    Jinxed Moderator

    i THINK yes thats right.
     
  20. loud'n'proud

    loud'n'proud Challenge Accepted

    so thats a first test... even with vac lines missing if it should boost solid, not as good but more than noticeable

    so if i just pull everything off, it should boos if its going to boost


    and this kind of thing wouldnt be caused by lack of fuel or anything fuel related would it.
     

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