Gobble/turkey sound coming from near turbo when letting off gas? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-21-2010, 05:26 PM   #1
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Default Gobble/turkey sound coming from near turbo when letting off gas?

Is this compressor surge? I have an intercooler with BOV (DSM Gen 1) positioned just off the pipe on the cold side between IC and throttle body/intake mani. I notice when I'm in boost and let off just as the boost needle drops below 0 on the gauge I get this gobbling noise coming from what sounds like near the turbo. I don't have a MBC hooked up yet, just running about 7psi boost with the stock Garrett 7psi WG. I tested the BOV with a vacuum and it works, do you think it needs to be closer to the TB or is not venting fast enough the blocked boost (when letting off accel) ? Thanks!
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Old 04-21-2010, 05:35 PM   #2
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Location is most likely not the problem, because most of us have the BOV the exact place you do. Where are you getting the vacuum source for the BOV?
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Old 04-21-2010, 07:09 PM   #3
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Originally Posted by Newbsauce View Post
Where are you getting the vacuum source for the BOV?
Front of the manifold, right behind the TB. But I have it tee'd off with other vacuum hoses going somewhere-I'll try to get it a dedicated port maybe that will help?
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Old 04-21-2010, 07:25 PM   #4
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idle car, get out, rev it hard at idle, pinpoint location.
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Old 04-22-2010, 05:39 PM   #5
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That is compressor surge and if your bov is adjustable, adjust it.
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Old 04-22-2010, 05:46 PM   #6
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TurkeyCallOnBOV.mov
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