[BiturboS4] Todd from AWE

[john sonty]

Two words...  the drivers.

--- Scott <stiles_s at hotmail.com> wrote:
> Good to see you here again, Todd.
> Any guesses as to why they fail more in the S4tt application
> then they
> appear to in either the 1.8t or A62.7tt installations?
> I realize the 1.8t turbo is a slightly different design
> (although still a
> K03), but I can't remember hearing about a single A6 or
> Allroad failure...
>
> Scott.
> '00S4
> '03996
> '00MiataFM2
>
> -----Original Message-----
> From: biturbos4-admin at audifans.com
> [mailto:biturbos4-admin at audifans.com] On
> Behalf Of Todd Sager
> Sent: Tuesday, April 22, 2003 4:58 PM
> Cc: biturbos4 at audifans.com
> Subject: Re: [BiturboS4] Todd from AWE
>
> Yes, still here though not checking in as often as I wish to.
>
> The pump is triggered by a thermoswitch, which is a sealed
> unit.  I
> suppose by doing some parts bin engineering, a lower temp
> switch could
> be substituted, or bypassed altogether with a manual or
> external switch.
>
> However, while an afterrun pump is certainly a good idea, it
> is not a
> substitute for proper cool down procedure.  Running coolant
> through the
> turbo will help drop temps, but the real problem is letting
> the turbo
> stop spinning when still red hot.
>
> Allowing the turbo to cool while idling keeps the turbo
> spinning during
> this time (as exhaust gasses pass through the turbine), which
> prevents
> an imbalance issue from occurring.  If the turbine is red hot
> and is
> allowed to stop spinning, the shaft can distort from the
> weight of the
> turbine wheel.
>
> There is no conclusive evidence why the K03s fail as often as
> they do,
> nor is there evidence that the "updated" parts have cured
> this.
>
> The failures are as varied as compressor wheel damage, turbine
> wheel
> failures, and seizing.  These can all be caused by overheating
> during
> operation, improper oiling, or improper cooldown.
>
> Our recommendation to customers is to either allow a 2-3
> minute cooldown
> at idle after high boost application, or a gentle no boost
> cruise for
> 1-2 miles before shutdown.  No question that this becomes even
> more
> critical when increasing the boost with a chip.
>
>
>
> "Marc A. Abernethy" wrote:
> >
> > Todd are you still on this list.  A couple of days ago we
> were
> > discussing turbo timers and the Audi after-run pump.  Are
> you guys at
> > AWE able to come up with a new thermostat for the S4s
> after-run pump?
> > So it will come on at lower temps.  This seems like it might
> be simple,
> > then again I have no idea to to it.
> >
> > Any thoughts?
> >
> > Marc
> >
> > _______________________________________________
> > BiturboS4 mailing list
> > BiturboS4 at audifans.com
> > http://www.audifans.com/mailman/listinfo/biturbos4
>
> --
> If you have any questions, please do not hesitate to contact
> me.
>
>
>
> Regards,
> Todd Sager
> President
> A.W.E. Tuning
> 215-658-1670
> Orderline 888-565-2257
> http://www.awe-tuning.com
>
>
> Be sure to check out our latest ad in the April issue of
> European Car
>
> _______________________________________________
> BiturboS4 mailing list
> BiturboS4 at audifans.com
> http://www.audifans.com/mailman/listinfo/biturbos4
> _______________________________________________
> BiturboS4 mailing list
> BiturboS4 at audifans.com
> http://www.audifans.com/mailman/listinfo/biturbos4


__________________________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo
http://search.yahoo.com