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

[David Pramanik]

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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