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Discussion Starter #1
hi guys my down pipe exhaust was leaking badly so today i had it changed for a new stainless steel std one.
however i noticed that the new one looked a fair bit thinner, i asked the mechanic and he said that it was the right one.
now i can hear the turbo so much its crazy, and it feels like theres a bit less power
any one had similar experiences?
cheers
john
 

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the pipe should the same as the oem one as this would have been of a calculated diameter i would imagine. so a thinner one would restrict the flow out from the manifold via the turbo and probably reduce boost too!
 

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The originals are double skinned pipes. Whereas the new stainless ones will be single skinned. It is the internal bore that is the important thing.
 

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get a set of vernier calipers on the internal bore ??? maybe check for leaks on the new system thats fitted also.
 

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Discussion Starter #7
The originals are double skinned pipes. Whereas the new stainless ones will be single skinned. It is the internal bore that is the important thing.
in that case its probably the same.

But why can i hear the turbo whistling sounds like my m8s old escort TD?

or is it supposed to sound like that? probably couldnt hear it before because of the leaking exhaust noise instead
 

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Discussion Starter #9
is that what they do when they are on their way out or something?

some more info please, it isnt smoking at all
 

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I'm no expert to be honest, BUT, I was driving a Iveco TurboDaily a few years ago with a really noisey whistling turbo, and it eventually packed in........like I said tho, I'm no expert! There's plenty of people on here who are tho......
 

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He may simply have not put something back on properly causing a boost leak or something, that will increase noise and reduce power. Check everything in the induction system is tight and secure.
 

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Yes, check all the hoses to and from the turbo are tightly fitted. Chances are one has come off if the car is really slow to drive.
Turbos usually howl and complain lots before they die.
 
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