Screaming noise from Turbo when on boost
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Screaming noise from Turbo when on boost
Hi
I've got a ecutek'd wagon with a dual map (low/high boost) and I'm getting a screaming noise from the turbo when on full boost.
Part boost on the high/low map is fine and full throttle/boost on the low map used to be fine too but from time to time that's starting to scream too. In summary I get the screaming on full boost (high map) and occastionally on full boost (low map). Nothing at all on part throttle (low or high map).
Any ideas what the problem could be? If the turbo blades were knackered wouldn't this scream all the time?
Could it be an air leak? (though the scream sounds very mechanical!)?
Many thanks for any advice/thoughts!
Richard.
I've got a ecutek'd wagon with a dual map (low/high boost) and I'm getting a screaming noise from the turbo when on full boost.
Part boost on the high/low map is fine and full throttle/boost on the low map used to be fine too but from time to time that's starting to scream too. In summary I get the screaming on full boost (high map) and occastionally on full boost (low map). Nothing at all on part throttle (low or high map).
Any ideas what the problem could be? If the turbo blades were knackered wouldn't this scream all the time?
Could it be an air leak? (though the scream sounds very mechanical!)?
Many thanks for any advice/thoughts!
Richard.
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Not really done much under the bonnet before so not confident of taking the inlet pipe off (would the play in the shaft or damage to the blades be obvious?).
Meant to say before that it started to happen for the first time during a track day session - so the turbo was being pushed much more than usual.
Is it fixable (if that is the problem) or would it need a new turbo?
Cheers
Richard.
Last edited by Scotsman; 25 January 2009 at 03:25 PM.
#6
I've got the same thing on a VF30. Probably a week after the remap (running 1.35bar peak) it started screaming/whistling under higher boost. I found no air leaks and there are some old posts on here regarding the VF series and this kind of thing. Over 10,000 miles later it still does it and still runs fine.
Probably sounds like a supercharger if you're outside the car.
Kevin
Probably sounds like a supercharger if you're outside the car.
Kevin
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I've got the same thing on a VF30. Probably a week after the remap (running 1.35bar peak) it started screaming/whistling under higher boost. I found no air leaks and there are some old posts on here regarding the VF series and this kind of thing. Over 10,000 miles later it still does it and still runs fine.
Probably sounds like a supercharger if you're outside the car.
Kevin
Probably sounds like a supercharger if you're outside the car.
Kevin
Cheers
Richard.
Last edited by Scotsman; 25 January 2009 at 05:24 PM.
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dont see a prob with andy mapping it then, how old/mileage on the turbo i had a horn type noise on my old vf35 if i hit the loud peddle hard in say 4th but was ok if you changed up to 3rd to spool it quicker when removed it had a very little shaft play but no apparent blade contact remember vf turbos are not as strong as td's or garretts ect
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dont see a prob with andy mapping it then, how old/mileage on the turbo i had a horn type noise on my old vf35 if i hit the loud peddle hard in say 4th but was ok if you changed up to 3rd to spool it quicker when removed it had a very little shaft play but no apparent blade contact remember vf turbos are not as strong as td's or garretts ect
Sounds like it will need replacing (can they be fixed easily if a bearing has gone of the shaft has play?) - so probably best sourcing a replacement VF35 (to save another remap) and just biting the bullet. Ho hum... always more expense!
Cheers
Richard.
Last edited by Scotsman; 25 January 2009 at 09:29 PM.
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Supposed to only have around 20k miles on it
Sounds like it will need replacing (can they be fixed easily if a bearing has gone of the shaft has play?) - so probably best sourcing a replacement VF35 (to save another remap) and just biting the bullet. Ho hum... always more expense!
Cheers
Richard.
Sounds like it will need replacing (can they be fixed easily if a bearing has gone of the shaft has play?) - so probably best sourcing a replacement VF35 (to save another remap) and just biting the bullet. Ho hum... always more expense!
Cheers
Richard.
If you remove the inlet pipe as Dynamix says and try to lift the shaft up and down. Feel how the turbo spins when the shaft is in the centre and then when you lift and try to turn you will feel if it is touching the casing.
Hope this helps
Colin
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