Turbo Reliability/Life span?
Discussion
Could some expert enlighten me here?
I know that turbos of old had to be babied , neeeded to be cooled after a hot run , turbo timers etc, but I don't hear any talk of these matters with the 996TT (or the 993 for what it's worth sorry fidgets), and I haven't seen a single thread here about someone having trouble with their turbos..
... So do they need to be cooled , have you got to sit in the car idling over for a few minutes after each drive?
This question by the way is to answer an arguement with a pal who's an engineer and insists that the laws of physics are such that a turbo is a pain in the arse
(not my opinion , obviously)
I know that turbos of old had to be babied , neeeded to be cooled after a hot run , turbo timers etc, but I don't hear any talk of these matters with the 996TT (or the 993 for what it's worth sorry fidgets), and I haven't seen a single thread here about someone having trouble with their turbos..
... So do they need to be cooled , have you got to sit in the car idling over for a few minutes after each drive?
This question by the way is to answer an arguement with a pal who's an engineer and insists that the laws of physics are such that a turbo is a pain in the arse
(not my opinion , obviously)Don't know about the 993 but the 996TT has "turbo cooling widgits" automatically switching on if you've turned the engine off whilst the turbos are hot.
Following our chat in december I think this link may be of interest:
www.911turbo.com/feature/2003-12/index.php
Following our chat in december I think this link may be of interest:
www.911turbo.com/feature/2003-12/index.php
Edited by dazren on Thursday 18th January 10:26
Ballcock, Happy New Year me auld mucker - thanks also for the kind words in the "best thread" thread prior to christmas - I completely welled up and had to go round to the vicarage for some "counselling".
Days to do are getting few, you're fitting a PSE an' its gonna be brand new too!!
(Sorry, bit stuck in village panto mode - still haven't learnt my lines and its on Saturday !)
XXX
The turbos still need to be babied and allowed to cool on a 993 turbo. Lifespans seem to vary - some people insist that turbos are shot by around 100 kmiles, but there are cars with almost double that mileage still on their originals.
The quickest turbo killer is to spin when driving in attack mode and stall the engine. Hot turbos spinning at over 100 krpm don't like the sudden lack of oil flow to their bearings...
The quickest turbo killer is to spin when driving in attack mode and stall the engine. Hot turbos spinning at over 100 krpm don't like the sudden lack of oil flow to their bearings...
Thanks for the answers folks ...
Was wondering where you'd got to Huz .. Light of my life an all that! .. Yes , fitting Pse in a few weeks
..
So is that it??... Widgits?
Editted to add , thanks Daz , that's a bloody good link , it's bringing out the Walter Mitty in me all over again
wetpipe .. Are you reading this thread
Was wondering where you'd got to Huz .. Light of my life an all that! .. Yes , fitting Pse in a few weeks
.. So is that it??... Widgits?
Editted to add , thanks Daz , that's a bloody good link , it's bringing out the Walter Mitty in me all over again
wetpipe .. Are you reading this thread Edited by ballcock on Thursday 18th January 11:05
now!Wetwipe said:
ballcock said:
wetpipe .. Are you reading this thread Edited by ballcock on Thursday 18th January 11:05
Yes. Shit
Bankrupcy here I come......
dude, if you take that
ing godawful opc offer on your car to buy that unispiring piece of crap i will literally kill you. with a spoon.
literally.
....nervous said:
Wetwipe said:
ballcock said:
wetpipe .. Are you reading this thread Edited by ballcock on Thursday 18th January 11:05
Yes. Shit
Bankrupcy here I come......
dude, if you take that
ing godawful opc offer on your car to buy that unispiring piece of crap i will literally kill you. with a spoon.
literally.
whilst you know well that i am not unreceptive to a good spooning, as kind as your offer is the only way the opc will get their hands on my car keys is to claw them out of my cold dead hand.
Hell I'd rather sell the car to an Dublin based walter mitty type traveller who continues to insist he has a responsible job.
sportsandclassic said:
What system is there on a 996tt that cools the turbos down when they are too hot if engine is switched off ?
I have not seen this sytem you are talking about,just changed 2 on a GT2 for modified ones and all looks very plain and simple.
I have not seen this sytem you are talking about,just changed 2 on a GT2 for modified ones and all looks very plain and simple.
Something I read a few years ago when the car came out. Can't remember where though. Will have a search around when my broadband is working again.
DAZ
(As mentioned earlier Tech numpty)
unless you live right next to a fast road such as a motorway or dual carriageway, I don't see it as a problem. If you have at least a couple of miles from these roads, if you have been gunning it, the few minutes driving at normal speeds on normal (town) roads are enough to cool everything down.
dazren said:
ballcock said:
So is that it??... Widgets?
Don't know the technical name for the bit/sytem. When you turn the engine off on a 996TT, if the turbos are too hot there is some system/thingy/widgit inplace that kicks in to cool the turbos.
DAZ
(technical numpty)
951's have a separate thermostatically controlled water pump that cools the turbo bearing housing after the car's shut off. I was surprised that on the 996tt/GT2 Porsche didn't use water cooled bearing housings but stayed with conventional K16/24 turbos like the 993tt.
I changed my K16s with newer K16s at just under 50,000 miles. The old Turbos were fine in terms of the compressors and turbines, with no oil leaks, but the intermediate bearing housing had cracks in it. In my opinion I didn't need to change them, but the main dealer was pedantic and I got hold of some new K16s very cheaply (much cheaper than carnewal)- I've since rebuilt the old ones and will sell them on.
The car feel fasterthan before, until I read that when you buy new K16s for a 993 you automatcially get the new and improved 996 K16 compressor wheel and housing design and also- that the wastegate actuators were probably set properly with the new K16s.
If I haven't revved the car/given it much boost, I can come home and switch the engine off as normal
The car feel fasterthan before, until I read that when you buy new K16s for a 993 you automatcially get the new and improved 996 K16 compressor wheel and housing design and also- that the wastegate actuators were probably set properly with the new K16s.
If I haven't revved the car/given it much boost, I can come home and switch the engine off as normal
Marquis_Rex said:
I changed my K16s with newer K16s at just under 50,000 miles. The old Turbos were fine in terms of the compressors and turbines, with no oil leaks, but the intermediate bearing housing had cracks in it. In my opinion I didn't need to change them, but the main dealer was pedantic and I got hold of some new K16s very cheaply (much cheaper than carnewal)- I've since rebuilt the old ones and will sell them on.
The car feel fasterthan before, until I read that when you buy new K16s for a 993 you automatcially get the new and improved 996 K16 compressor wheel and housing design and also- that the wastegate actuators were probably set properly with the new K16s.
If I haven't revved the car/given it much boost, I can come home and switch the engine off as normal
The car feel fasterthan before, until I read that when you buy new K16s for a 993 you automatcially get the new and improved 996 K16 compressor wheel and housing design and also- that the wastegate actuators were probably set properly with the new K16s.
If I haven't revved the car/given it much boost, I can come home and switch the engine off as normal
Do you know if I fitted K24s supplied by Porsche in the last 3 months whether they are 'new & improved'?
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