turbo timer?

[Kneale Brownson]

Aren't you confusing the afterrun water pump for the turbo with the 
afterrun air blower for the injectors?


At 08:53 AM 10/08/2001 -0400, Beatty, Robert wrote:

>To further clarify this issue... the afterrun pump was put in also to help
>prevent vapor lock which was apparently a problem on hot days with the turbo
>keeping temps high under the hood.
>
>Rob
>
>From: Phil Payne
>
> >   People are grossly overconcerned about the whole
> > > issue, probably because early turbos were not oil cooled, and
> > > synthetic
> > > was not in common use.
>
> > Turbos not oil cooled?  Good grief how did they stay operational ;)
> > I think you meant to say not water cooled.
>
>I think he's right.  Audi refers exclusively to the early turbos as 'air
>cooled' - I think they even reinforced this in a TSB at one point.  The 'run
>down' after what Audi refers to as "spirited driving" should be done with
>the car in motion - not parked and idling.
>
>But Audi have said on the record that oil contributes very little to cooling
>down the turbo.  Even on the water-jacketed versions, the water only stops
>heat from cooking the oil - it doesn't do very much towards cooling the bulk
>of the turbo.  A 'run down' is still recommended.
>
>
>
>
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