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Robbbyg's Avatar
 
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Deflating Exhaust Pipe??

Please refer to pics,
What causes the deflation of the Part of the Exhaust where it mounts the Turbo?

It is intact on the outside and if you didnt take it off you wouldnt know its there,

Is it good idea to grind it away, as im sure it would impede flow,
but if i grind it away will it weaken it making it unreliable?




This is the same area on outside -no sign

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Old 05-21-2014, 07:30 PM
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My guess is boosted lean running heat and time along with a whole bunch of hot shutdowns did that.
That's the first time I've seen an original one break down like that.
Old 05-21-2014, 07:45 PM
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Is it delaminated and rusted? Hard to see, slightly out of focus.
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Old 05-21-2014, 09:05 PM
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Quote:
Originally Posted by JFairman View Post
My guess is boosted lean running heat and time along with a whole bunch of hot shutdowns did that.
That's the first time I've seen an original one break down like that.
that would explain the Previous owners invoice for replacement Turbo ,
On the invoice it mentioned it was running lean for too long,

I don,t have equipment to measure my Air/Fuel mix, is there something/setting i can do to err on the side of rich mix?

On my Fuel head the 3mm nut that adjusts the mix seems to be missing, there is only a larger allen nut about 5mm (the cover) under it there is nothing only a hole that goes straight through to the chamber.
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Row 1998 996 MK1 3.4 296hp new daily driver
Old 05-21-2014, 09:38 PM
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Quote:
Originally Posted by jsveb View Post
Is it delaminated and rusted? Hard to see, slightly out of focus.
Heres some more pics, (delaminated)? not sure what that is,
There does seem to be a rusty tinge to it though, some more pics

Exhaust



The Base of the Turbo


Headers showing color of gases, its quite white, is this a too lean mix?

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Row 1998 996 MK1 3.4 296hp new daily driver
Old 05-21-2014, 09:43 PM
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