Porting the wastegate on 04 STi

Discussion in 'Modifications & DIY how-to' started by Alex, Dec 25, 2005.

  1. Alex

    Alex Community Founder Staff Member

    Anyone know how much this would cost from Deadbolt or such? I'd love to ensure that I never see boost creep again. Especially after my experience at Little Tally this past Thursday.
     
  2. miloman

    miloman Retired Admin

    contact jerry... link to their page

    what happened at tally?
     
  3. moose

    moose Infina Mooooooose!

    May as well do a full P&P if you are going to take it off anyway. I would guess around 200 bucks.
     
  4. Alex

    Alex Community Founder Staff Member

    Well I had a blast, but first 3 runs were learning to shift around boost creep :wtc: By the end of the day (4th and 5th run), I had it down. It was just so cold there (<30 degrees) that my poor car with the full 3" out sans EM was having some trouble. This equated to me never being able to hit full throttle.

    P&P doesnt seem worthwhile on the vf39, however, ceramic coating does.
     
  5. miloman

    miloman Retired Admin

    didnt u say u were gonna get ecutek'd sometime in december?
     
  6. Alex

    Alex Community Founder Staff Member

    Yes, or early Jan :bigthumb:
     
  7. miloman

    miloman Retired Admin

    ooooh..... dirty dirty :naughty:
     
  8. Alex

    Alex Community Founder Staff Member

    Wish you were here for it :wtc:
     
  9. JJang12

    JJang12 Active Member

    deadbolt won't do porting wastegate due to common crack issue of vf39.
     
  10. blink

    blink Member

    what is boost creep?
     
  11. miloman

    miloman Retired Admin

    u experience boost breep when under load, the boost 'creeps' up towards +infinity fairly quickly...

    here's my understanding of what causes this... someone correct me if im mistaken

    exhaust gases flow over the turbine on the hot side of the turbo causing the turbine to spin... this spins the turbine on the cold side through a shaft and builds boost... the wastegate (on the hot side) can be opened to allow exhaust gas to bypass the turbine in order to control boost... if the wastegate can't flow the desired amount of gas, then more gas flows over the turbine and builds more than desired boost
     
    Last edited: Dec 29, 2005
  12. Alex

    Alex Community Founder Staff Member

    sounds correct. once the build up is too great, the ECU attemps to correct by cutting fuel to the engine (instant stop) and you have a sudden surge, causing an extreme (but very short) period of leaning out the engine.
     
  13. Trey

    Trey Active Member

    There was a HUGE thread on NASIOC on DIY that had pics and exactly where to remove the material.

    You can do it yourself with a dremel. Takes no more than 10 seconds once the exhaust side housing is removed.

    Mine works great.


    Also, All that cracking talk is pointless.

    No one has proven that they have a loss in performance because of a hairline crack either. ;)
     
    Last edited: Dec 29, 2005
  14. Alex

    Alex Community Founder Staff Member

    Trey would you be interested in giving me a hand at some point ? Perhaps during the install day? :bigthumb:
     
  15. wrxguy

    wrxguy Member

    Boost creep is rising boost due to not enough exhaust bypassing the housing.
     
  16. Trey

    Trey Active Member


    ...hence enlarging the opening. lol


    Sure Alex, you take it off and I'll show you where to remove the material, hell I'll do it if ya want. It's easy. :)
     
  17. Alex

    Alex Community Founder Staff Member

    Alright man, I may have to take you up on that offer.
     

Share This Page