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

[robert weinberg]

ahh, i see. well, ya gotta pay to play ;-)

as far as fuel pressure, you could run a vortech fmu
(fuel managment unit). again talking out my ass. but
that's what boosted mustang guys do.

what probably needs to be done to run gnarly boost
with K04s (or fun boost with no worries) is:

larger injectors
larger fuel pump - like a walbro 225 lph. i used to
think they were just for american cars. but i've seen
them in dsms as well. and they are a lot cheaper than
any fancy euro stuff they have out there.
get that bastard on a dyno with a knowledgeable tech.
they will custom burn a chip for it while it's on the
dyno. the ONLY way to go. none of this generic chip
stuff. every car is different. a fuel map that runs
great on one car may run lean on another. so many
factors come into play.

good thing i have ATP (advanced tuning products) less
than a mile away from my work ;-)

see ya,
Robby


--- California Fields <cfields72 at hotmail.com> wrote:
> >From what I understand, the stock fuel pressure
> regulator (and injectors?) 
> are maxed out (in addition to the MAF) with K04s and
> a chip....so you run 
> too lean. However, K04s with a stock chip works OK
> because the amount of 
> fuel needed at max boost is still within the
> capabilities of the stock FRP 
> and injectors.
> 
> Cal.
> 
> 
> >From: robert weinberg <centaurus3200 at yahoo.com>
> >To: Biturbos4 at audifans.com
> >Subject: Re: [Biturbos4] Replacement turbos - buyin
> A6 2.7T with blown 
> >turbos
> >Date: Tue, 3 Feb 2004 14:33:02 -0800 (PST)
> >
> >what is the diameter of the stock mafs? there are
> two,
> >correct?
> >
> >you can dial in more fuel (via chip or af-c) so you
> >wouldn't run lean, but airflow is important
> obviously.
> >
> >in the world of boosted SHOs, i have never seen a
> >highly tuned one (450 wheel hp and way above)
> without
> >being tuned on a dyno. but, then again, i haven't
> >heard of too many chipped 2.7Ts munching the rings
> >either. so, maybe detonation isn't that big of a
> >problem with the bosch motronic.
> >
> >Robby
> >
> >--- David Pramanik <dap128 at hotmail.com> wrote:
> > > 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
> 
=== message truncated ===

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