[Es2] [s-cars] RS Tuning tube header cracks at second track event

[djdawson2@aol.com]

Trevor,
I'd buy in to the weight arguement, IF the crack had occured on one of the main tubes.  But on the WG pipe?  The only weight there should be the WG itself.
 
Not to beat a dead horse, but these headers should hold up.  I now have 22k miles on mine... much of which I would never consider to be "normal" use.  My use has included numerous extended WOT throttle runs that have produced 1500+ degree (F) EGTs... repeated dyno tests... and many use situations that have resulted in the entire header glowing red, as well as the turbine housing and the first 8-10 inches of the DP.  My header has no additional bracing or supports to reduce stress on the header.
 
If Elijah's WG pipe has failed, I'd have to guess that he's missing a flexible pipe between the WG and the main DP body... in which case, this type of failure should be expected.
Dave
 
-----Original Message-----
From: Trevor Frank <tfrank at symyx.com>
To: djdawson2 at aol.com; elijahallen92 at aol.com; s-car-list at audifans.com; es2 at audifans.com
Sent: Mon, 8 Aug 2005 14:25:13 -0700
Subject: RE: [s-cars] RS Tuning tube header cracks at second track event



Even with something flexable the weight it'self in a turn is enough.

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of djdawson2 at aol.com
Sent: Monday, August 08, 2005 2:22 PM
To: elijahallen92 at aol.com; s-car-list at audifans.com; es2 at audifans.com
Subject: Re: [s-cars] RS Tuning tube header cracks at second track event


Do you have a flexible section of pipe between your WG and your
downpipe?  If not, that is why it failed.  Otherwise, I think you are
having excessive EGTs.  It is pretty odd that it cracked on the WG pipe.
Good luck, Dave



-----Original Message-----
From: elijahallen92 at aol.com
To: s-car-list at audifans.com; es2 at audifans.com
Sent: Mon, 08 Aug 2005 10:15:46 -0400
Subject: [s-cars] RS Tuning tube header cracks at second track event


Hey guys, just got back from a 3 day event at Waterford Hills. The car
ran good

most of the time but I did have a few issues. The first one was that the

subframe bolts would not stay tight and when I went to re-torque them I
over

torqued one and it broke off up in the frame. Luckily there was another
coupe

there that had an engine blow and was being trailored home so I was able
to get

a bolt from him to continue the event. I got a bolt extractor and
drilled and

extracted the bolt only having to miss one  rungroup. I put a bunch of
lock

tight one them and they seemed to hold. The other problem I was having
was after

about 15 minutes on the track the car would dial boost back from
24-26psi down

to 10-12psi. I never figured out why it was doing this but all I can
think is

the EGT's were just getting to hot. My oil and coolant temps were fine
and

although I don't have an intake air temp sensor the tube coming out of
the cold

side of the intercooler stayed fairly cool. On the last
  day I felt like I had a boost leak and could hear a hissing sound so I
pulled

of to check and noticed a nice size crack in the tube header on the tube
that

goes to the WG. This car has only been to two track events so I'm not
real

excited about the build quality of these headers. Hope the others
running them

do some major looking over and maybe some more structural welds like HAP
did.

I'll be having mine welded for now but am going to have a better one
made soon.

Any feedback on the boost backoff is greatly appreciated. Thanks,

Elijah
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