Anyone done the 3/16th mod?

Discussion in 'Modifications & DIY how-to' started by Demo24, Oct 31, 2007.

  1. Demo24

    Demo24 Member

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    Well I came back across this mod today and have been considering doing this. Faster spool times with slightly more boost sounds good to me and all for under 2 bucks works for my wallet as well. :naughty:

    Thinking about going 3/32nd's instead to try and ward off some of the negatives that the 3/16th's can occasionally present with.

    anybody here with experience in this mod? I don't have a boost gauge yet so if I do, do this it will only be noticed by the ass dyno.
     
  2. 5spdfrk

    5spdfrk Active Member

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    From all that's been said, I wouldn't bother with it.
     
  3. FACE

    FACE Active Member

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    So how does this mod work?
     
  4. WJM

    WJM Banned

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    Just dont do it...period.

    get a REAL TUNE instead.
     
  5. FACE

    FACE Active Member

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    Wasn't planning on it...waiting for warr. to run out!
     
  6. WJM

    WJM Banned

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    your 5 year/60,000 powertrain warranty I hope...;)
     
  7. Kokopelli

    Kokopelli Active Member

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    Haven't seen this mod in a while.

    It doesn't cost much and you get what you pay for.

    I wouldn't bother.
     
  8. Demo24

    Demo24 Member

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    hmm, ok I won't bother then.
     
  9. WJM

    WJM Banned

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    ^^Good.
     
  10. Demo24

    Demo24 Member

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    just curious as to why it is so bad. I can't see a lot of issues with it besides boost spiking, thus why I was planning on 3/32
     
  11. WJM

    WJM Banned

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    Ummmm...yeah.

    BOOOOOOOMMMMMMMMM!
     
  12. goixiz

    goixiz Active Member

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    if you cant tune for that you will get boost fluctuations or overboost conditions.
    What you are creating is less flow to the actuator hence less leakage and more initial boost.

    YOu would overboost but not to apoint where it will exceed 20psi or some crazy number. your CEL will come on first and if stock ECU/ROm it will actually limp your car before it goes kaboom.

    I can do something even better for free and less chance of boost fluctuations
     
    #12 goixiz, Oct 31, 2007
    Last edited: Oct 31, 2007
  13. nsvwrx

    nsvwrx Active Member

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    what your doing is letting less air though to the 'thing' that opens the waste gate, AND the air that gets there is slower to get there.. hence its you over boost AND build boost faster than your ECU can compensate for.
    in other words BOOM!
     
  14. goixiz

    goixiz Active Member

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    cmon dont scare him
    it wont go boom if you didnt go crazy with the mod (like pinch the tube)
    worst is it will fluctuate boost a lot (cycling) or spike a few psi more than target.
    (i assume he is stock EM) its just not a pleasant drive.

    There are checks in the EM that prevents a lot of unwanted conditions but may not catch all when you start to gowild with mods
     
  15. GTscoob

    GTscoob Black is Beautiful

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    Cmon man you can build an MBC for less than $20, just do that and set it at 16psi or so and make sure you have a boost gauge so you can watch out for partial throttle full boost. 3/16 mod is ghetto as hell, at least with a MBC you can somewhat control your boost.
     
  16. siegelracing

    siegelracing Registered Vendor<br><b><font color="#666666">bion

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    You get what you pay for.

    Siegel
     
  17. FACE

    FACE Active Member

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    ^^^ thats why we pay you!
     
  18. WJM

    WJM Banned

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    Bad idea again.

    There is a reason the stock 2.0 WRX runs 13.93 PSI and not 16 PSI from the factory.
     
  19. Demo24

    Demo24 Member

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    I was under the impression it let more air through.

    I was looking for an easy way to help smooth things out a bit, and more boost earlyer sounded good as well. Getting rather tired of the annoying power fluctuations I get under heavy throttle.
     
  20. nsvwrx

    nsvwrx Active Member

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  21. WJM

    WJM Banned

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    More air thru the restictor means LESS BOOST.
     
  22. nsvwrx

    nsvwrx Active Member

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    its supposed to make it smoother.. just get EM..

    read the article i poted.
     
  23. Demo24

    Demo24 Member

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    I have, and the 26 page one on nasioc.


    and I would get em if I had 600 bucks to blow at the moment
     
  24. goixiz

    goixiz Active Member

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    or $95 and a laptop and some patience
    yes it lets more air through to the BCS = less air to the actuator = more boost
     
  25. Demo24

    Demo24 Member

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    yeah, there is that way. I looked into it for awhile, but I don't really want to tune myself on this car. And it just seemed a bit iffy overall. Granted if done right it can be quite good. I just dont want to take the chance
     

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