eclipsesound.WMV ( 1.03mb ) Number of downloads: 127
[attachmentid=6341]Eclipse GST 97 125,000
manual boost controller
greddy type rs BOV (venting to atmosphere)

When the turbo kicks in I hear the normal turbo spool sound that I should (nice whirrr/whistle) but when I give it more gas a higher pitched whirr sound kicks in that is not normal. this happens on two different known good rs-type bov's so I don't think it's that. it happens regardless of how loose or tight the nut on the bov is.

I pulled the inlet pipe off and didn't feel any play on the turbine, checked for cracks in the hose. i just replaced my air filter thinking that may resolve it but no go.

only thing i've had replaced on it in the past 6 months (since this started) is my ECU but I don't see how that could cause this although i'm open for suggestions.

Watch the video..what do you think?

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sounds like yer turbo fins are scraping the housing wall. take off your intake and see if the turbine blades are worn.

take the intake rubber hose off and touch the turbine wheel and see if there is any play at all. it there is start saving and get a new turbo.

it sounds like you got a pi$$ed off bird in your intake. it could be that with the amount of stress your putting on your turbo you could have some sort of bearing problem under high stress of the turbo. most likely when its working hardest trying to spool up from lower rpm to higher. do the two test that were posted before my reply. if its not those, your looking at some sort of lubrication problem with your ball bearings. and there isn't much you can do about that other than buy a new turbo.

the bird chirping sound you hear at the start of the video is actually birds chirping, the high pitch is a consistent noise

why are you venting into the atmosphere? its not a good thing on these cars. unless there is something i'm missing here.

Unless you have your FMU set up for venting, its bad.

haha, that's funny. we are all trying to diagnose birds. I guess bullet wins!




:offtopic: sorry, back to the issue. did you block off the BOV return pipe on the intake pipe? if you didn't that could be why it's louder, block it off and try it out.