[BiturboS4] it finally happened

[California Fields]

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Also, one thing people fail to point out about the bi-pipe is that it's made
out of METAL and, therefore, gets very hot and, therefore, makes the air going
into the engine hotter than if you stuck with the stock plastic one. People go
to great lengths to cool their intake charge (intercoolers, air/alcohol
misters, etc.) and this bi-pipe thing does the opposite.  IMHO, no need for
the bi-pipe...just inspect your throttle-body boot once in a while and use the
VAG tool to monitor your car.

When I first got into tuning my S4, I got sucked into thinking I had to have
all of these parts to make my car go fast. Then my wallet shrank to nothing
and I started thinking harder about each purchase.  I did a lot of reading and listening
to other's experiences and I realized that a lot of these parts aren't
necessary. A stock TBB (throttle body boot) is as good as an aftermarket SAMCO
one or the APR bi-pipe (or worse, see first paragraph). A stock diverter valve
(DV) is fine if it doesn't leak...and it ever offers quicker boost/vaccuum
response than the large/heavy aftermarket ones (ever tried comparing...to me
its obvious). Sure, these things might fail sooner than the aftermarket ones,
but why not just monitor your car along the way and replace as needed? It's much
cheaper to swap in a new TBB ($12) or a pair of Bosch sport DVs ($50) than to
go with the aftermarket ones.  Oh well, just one train of thought versus
another I suppose.

Regardless of your train of thought I think EVERYONE should have the
following:  VAG tool ($199), boost gauge (around $250), and the knowledge to
inspect your throttle body boot and diverter valves (free and available here
or on AudiWorld). It's also very helpful to have an intake pressure tester
($15 from AWE plus $20 for air at Home Depot) so that you can see if you have
any boost leaks.  All of this is CHEAP (compared to the mods we do), FUN, and
helps you avoid costly problems.

Just my $.02.

Carter.
------------------------------
Carter Fields, San Francisco
2001.5, GIAC-X, Miltek 3" cat-back, Strat. shifter, Strat. DVs, A-pillar boost
gauge
------------------------------
>From: "Tuan Nguyen"
>To:
>Subject: RE: [BiturboS4] it finally happened
>Date: Mon, 9 Jun 2003 11:27:29 -0500
>
>Be very careful with the APR bi-pipe. It's a nice product but can leak
>as well. Make sure you do a pressure test after the installation. My
>bi-pipe leaked at the throttle body. I had to purchase more O-rings and
>used 3 instead of 2 to make sure it sealed.
>
>Tuan
>
>
>-----Original Message-----
>From: biturbos4-admin at audifans.com [mailto:biturbos4-admin at audifans.com]
>On Behalf Of John Chase
>Sent: Monday, June 09, 2003 10:40 AM
>To: richard at nessnet.com; biturbos4 at audifans.com
>Subject: RE: [BiturboS4] it finally happened
>
>Were you chipped?
>
>P.S.
>
>I heard from a reliable source that the LOUD turbo noise if from a
>broken Y-pipe right on top of the motor. It gets ripped and then the
>turbo over compensates for the air leakage and your turbos are WAY over
>worked. Solution: replace Y-pipe with an aftermarket solution (apr makes
>a good replacement).
>
>John
>01s4
>
>
>-----Original Message-----
>From: biturbos4-admin at audifans.com [mailto:biturbos4-admin at audifans.com]
>On Behalf Of Richard Ness
>Sent: Saturday, June 07, 2003 10:29 AM
>To: biturbos4 at audifans.com
>Subject: [BiturboS4] it finally happened
>
>
>On the way home last night...
>moderate to hard(er) acceleration, a little lurch and
>boof!!! huge cloud of smoke out the back.
>no turbo whine warning, just let go, or
>at least I am assuming it is a turbo or related gasket.
>Oil level was zip in no time and dripping out the tailpipe
>also dripping under RH side of engine. I'm freaking because when it
>went, I was on a bridge and couldn't safely pull over. Had to drive a
>bit w/ oil warning on and I'm praying I didn't F-up the top end also.
>NOT a good day!!
>
>Damn kicker is the car has 42K but is over warranty in
>time. I am hoping to work the 50/50 deal or talk to Todd
>and just do it (right), but this is unexpected and 10K would
>be a bit much to scratch up on short notice....
>
>Richard Ness
>richard at nessnet.com
>
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>
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