[Biturbos4] Replacement turbos - buyin A6 2.7T with blown turbos

Tue Feb 3 17:35:33 EST 2004

Dave, how much more power do you get out of just the K03 -> K04 upgrade 
(i.e. keeping stock chip and other components)?  Or, is the power output the 
same but just shifted (i.e. same hp peak but higher up in the rpm)?

Cal.

>From: "David Pramanik" <dap128 at hotmail.com>
>To: <adam.schwartz at rcn.com>, <Biturbos4 at audifans.com>
>Subject: Re: [Biturbos4] Replacement turbos - buyin A6 2.7T with blown 
>turbos
>Date: Tue, 3 Feb 2004 17:20:10 -0500
>
>The K04 is slightly larger in terms of the housing size than the K03.  And
>you are right, the K04 is more geared towards higher boost, higher RPM
>applications than the K03s with are for low end torque.
>
>Putting K04s (and inlet pipes since the K04 inlets are larger) into an
>otherwise stock S4 would work fine.  There would be slightly increased
>airflow at the same boost levels, but the stock fueling system can more 
>than
>compensate for that (it meters fuel based on the incoming airflow).  I am
>presently running K04s on a standard K03 chip with no problems.  I am at 
>the
>upper limit of the MAF and fueling system, but I'm not running overly lean.
>If I increased the boost, I would be, hence the requirement for larger MAFs
>and injectors with the complete K04 kits (which run more boost than than 
>the
>K03 chips do).
>
>-Dave Pramanik
>
>
>----- Original Message -----
>From: <adam.schwartz at rcn.com>
>To: <Biturbos4 at audifans.com>
>Sent: Tuesday, February 03, 2004 4:53 PM
>Subject: Re: [Biturbos4] Replacement turbos - buyin A6 2.7T with blown
>turbos
>
>
> > Hi,
> > I think K03 and K04 turbos are about the same age in terms of
> > design.. And I dont think the K04 was intended to replace the
> > K03.
> >
> > I have seen both side by side and the K04 impeller diameter
> > is larger, but very slightly. They are intended for higher
> > boost applications.
> >
> > Here is a good pic of the 2. The K04 is on the right
> >
> > http://www.audiworld.com/news/99/turbo/lo4lko4r1.jpg
> >
> >
> > In theory, if you put a K04 into the S4 and drive it at or
> > slightly over the standard boost of a stock S4, the turbo
> > could last longer because it isnt being pushed as close to
> > its limmit - But I have heard that if you dont make a bunch
> > of other changes, and just put in the K04 chip your mixture
> > will be off... Is it lean? Maybe someone could talk about
> > what the minimum requirement is to replace the K03 with K04's
> > in terms of other parts needed...
> >
> > Adam
> >
> >
> > ---- Original message ----
> > >Date: Tue, 3 Feb 2004 13:26:28 -0800 (PST)
> > >From: robert weinberg <centaurus3200 at yahoo.com>
> > >Subject: Re: [Biturbos4] Replacement turbos - buyin A6 2.7T
> > with blown turbos
> > >To: David Pramanik <dap128 at hotmail.com>
> > >Cc: Biturbos4 at audifans.com
> > >
> > >so, what is the benefit of the K04? i understand they
> > >are slightly larger. but it seems wierd KKK would have
> > >too very similarly sized turbos. do you think, more
> > >likely, that the K04 is a revised and tougher version
> > >of the K03? maybe admitting the problems with the K03?
> > >
> > >will the K04s infact last longer and end this whole
> > >blown turbo problem?
> > >
> > >hey, why don't i throw some K24s on the 2.7T motor?
> > >;-) kidding, aren't those the twin turbo porsche
> > >turbos?
> > >
> > >Robby
> > >
> > >--- David Pramanik <dap128 at hotmail.com> wrote:
> > >> K04s are (slightly) larger than the stock K03s.
> > >> They don't spool up faster,
> > >> but the size difference is pretty small so the
> > >> increase in lag is probably
> > >> less than 500 rpm.  Peak torque will be higher with
> > >> a K04 due to higher
> > >> boost/more airflow, but it will be delayed slightly
> > >> due to the small
> > >> increase in lag.
> > >>
> > >> -Dave Pramanik
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "Michael Benno" <mbenno at yahoo.com>
> > >> To: "David Lau" <toomanycars at mac.com>; "robert
> > >> weinberg"
> > >> <centaurus3200 at yahoo.com>
> > >> Cc: <Biturbos4 at audifans.com>
> > >> Sent: Tuesday, February 03, 2004 12:43 PM
> > >> Subject: Re: [Biturbos4] Replacement turbos - buyin
> > >> A6 2.7T with blown
> > >> turbos
> > >>
> > >>
> > >> > Your points are very good. The list is not a
> > >> proper maket representation.
> > >> >
> > >> > However, regarding your comments on the spool up
> > >> time of the K04 vs.
> > >> K04...Most people (on Audiworld) who have done the
> > >> conversion to K04 claim
> > >> much faster spool up times. I can't say much about
> > >> the torque but mathmatics
> > >> would lead me to believe that torque is directly
> > >> related to boost, so that
> > >> must be higher too. To be honest I really don't know
> > >> the mechanical
> > >> differences between the two.
> > >> >
> > >> > Anyone care to enlighten me?
> > >> >
> > >> > Mike Benno
> > >> > a6 2.7t MTM1
> > >> >
> > >> >
> > >> > David Lau <toomanycars at mac.com> wrote:
> > >> > Sounds like a plan to me, Robby, you may never go
> > >> back to the SHO!
> > >> >
> > >> > But I do think the K03 problems are out of
> > >> proportion on this list. What
> > >> > percentage of biturbo owners worldwide are on this
> > >> list, maybe 5%? and
> > >> what,
> > >> > 10% of us have had failures? Total guesses, you
> > >> understand. And we're
> > >> harder
> > >> > on them than most, chipping and all, yet probably
> > >> maintain them better
> > >> too,
> > >> > so that may wash. (How many average owners even
> > >> THINK about that cold,
> > >> thick
> > >> > oil squeezing through those tiny passages at
> > >> startup?)
> > >> >
> > >> > I've heard the K03s were designed for torque, not
> > >> feindish horsepower
> > >> > anyway. Being small, they spool quickly, and give
> > >> full rated (stock)
> > >> torque
> > >> > at only 1800rpm. High rpm, sure, they run out of
> > >> cfm to maintain high
> > >> > boost...
> > >> >
> > >> > David
> > >> > --
> > >> >
> > >> > some of you know i am lurking on this board
> > >> > researching A6 2.7T as my potential next car
> > >> (along
> > >> > with the 540i 6 speed). well, what about buying an
> > >> A6
> > >> > 2.7T with blown turbos wholesale. either private
> > >> party
> > >> > or from a dealer that just wants to get rid of it.
> > >> > then put a K04 upgrade on it and be happy?
> > >> >
> > >> > am i dreaming? what do you guys think?
> > >> >
> > >> >
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