KO3 or KO4 turbo for my A4 (B6)

[Nicholas Miller]

I suppose upgrading it can't hurt.  If the larger turbo is more efficient
you will see lower intake temps from improved thermal efficency when it
compresses the air,  and usually larger compressor wheels are more
efficient and produce less heat.

It will also let the person flashing the ecu program for boost better most
likely.

As for a real power increase without supporting mods, its doubtfull to be
much, I would guess 5 to 15hp in some spots that the new turbo is better at
than the old one and very little peak, unless the chip increases peak
boost.

I would research more the platform and see if it needs a new intake or
exhaust more to breathe better and at least do an exhaust downpipe and
catback.  I can't speak specifics to the b6 platform as I don't know it as
well as the older cars.

Nick
On Mar 23, 2012 10:30 AM, "Arthur Marks" <aamarks at cox.net> wrote:

> I think the strange random sound coming from my A4 is the turbo going bad
> (inconsistent grumbling at low acceleration).
>
> I don't want to get into too many modifications. Would upsizing the turbo
> with just a chip tuning be any better or do you have to start changing
> exhaust, injectors,... to get any benefit from it? I would be doing the
> work myself so suggestions on where to send the chip would help too.
>
> Thanks,
>
> --Art
> A4, (B6) 100k miles
>
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