what causes this noise in a turbo? - Page 2

01-21-2011 | 05:54 PM

#26

lordagrabah

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From: Milford, MA

All right I think I finally found the answer. I think the high pitch noise on the turbo is caused by an anti-surge housing. Correct me if I'm wrong. Here is a perfect example of the sound.
http://www.streetfire.net/video/2005...12-w_88384.htm

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01-21-2011 | 06:12 PM

#27

Brettus

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From: Y-cat-o NZ

Quote:

Originally Posted by lordagrabah

So in a nutshell, different turbos make different noises? If so, is it the larger the turbo, the higher the pitch during spool up? This may be a better example of what I'm talking about.
http://www.youtube.com/watch?v=cslnCWlB9vE
]

That first one sounds like it has really bad surge - along with other issues . Not good .

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01-21-2011 | 06:55 PM

#28

lordagrabah

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Yeah I thought the synapse bov would have helped that. The last video really depicts the sound I was talking about. I really like the look of the protech setup though, with a cai of course.

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01-21-2011 | 07:02 PM

#29

lordagrabah

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I believe the other name for it is a ported shroud on a turbo.

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01-21-2011 | 07:22 PM

#30

Brettus

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From: Y-cat-o NZ

Quote:

Originally Posted by lordagrabah

Yeah I thought the synapse bov would have helped that. .

You can see the valve is in the closed position when you hear the fluttering sound so I'm guessing that is the anti stall feature coming into play . Another good reason to run recirc vs VTA .

Last edited by Brettus; 01-21-2011 at 07:30 PM.