installed maperrformance o2 dump tube....
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installed maperrformance o2 dump tube....
just installed it and it really makes my car spool up faster and smoother...it feels like the horsepower jump that i made from installing cams.....performance wise it's awesome......unfortunately... upon startup and and lower rpm driving there is a gurgling sound/exhaust leak sound coming from the pipe....i was under the assumption that it only opens when the waste gate sees full boost....is anyone else getting this?.....or is my waste gate leaking or maybe the dump valve on the turbo not sealing properly?....if so, then shouldn't my car be faster because i've been bleeding boost this whole time.....this pipe really sounds like crap and it's kind of embarassing esp. with summer time coming up....debating to remove it .......it's that bad....the car sounds untuned...but on the brighter note.....it feels like i freed up some power....ohhhhhh what to do?????
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i used the new one.....but it's not leaking from there....it's coming out of the actual dump tube........as if the butterfly valve is open....on full throttle when the waste gate opens, it's fine and it sounds awesome....it's just when i crawl through traffic or at a light, it sounds like i have a rusted out exhaust
Last edited by silver fly; Apr 20, 2010 at 06:00 AM.
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does the stock turbo tend to leak boost at that valve?.....if so than how many of us stock turbo users are not at their full boost potential?......if i installed a reg. o2 housing, i would have never known and maybe that's why we have boost creep and fluttering.....due to the turbulence created
#5
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The reason I asked about gaskets is b/c the stock gasket doesn't seal between the two chambers. All internal wastegates don't seal 100% perfectly, but don't leak to the extent you're reporting. You should check the tension on your WGA arm and make sure its holding the WG flapper fully shut; it may need some adjustment.
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that's what i ended up doing.....what a ***** to get to the bolts on the wastegate bracket....had my son's little arm turn the bolts after i cracked them loose.......i ended up dremeling the tip of the arm....after all that my son couldn't thread them back in so i took off the inner fan and had him retry it.....it worked....kids are good for some things.....lol.....now for my 2nd evalutation...feels like i am boosting more in the lower rpm's now and spool up is wicked fast....i must have been leaking boost all this time....i recommend doing this with the radiator out all at the same time.....but unfortunately i wouldn't have known about the boost leak if it wasn't for the dump