[s-cars] RS2 Tubular Headers

[Ned Ritchie]

Heinz Lehmann who built many for Audi used a slip joint on each and
every runner on his tubular stuff to reduce the stress from elongation
from heat and shrinkage from the cooling.  They seemed to hold up a
little longer, but some still failed.
Ned

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of Trevor Frank
Sent: Friday, November 05, 2004 1:22 PM
To: CaptMagu at aol.com; joe.pizzimenti at gmail.com; gregsj2 at comcast.net
Cc: s-car-list at audifans.com
Subject: RE: [s-cars] RS2 Tubular Headers


I have replace and or redone several header on race cars and street cars
that where ceramic coated steel on turbo cars and rotary motors in
stainless steel, 321, to increase longevity.  On the rotary motor it
would blow out each race.  The last turbo motor it would blow out every
other race.  I have never seen it done the other way around, going from
stainless to coated steel.  I also was part of a design on a tube header
for a 1.8t, in mass production 200 units.  I recommended stainless and
we built one prototype, it worked flawlessly.  The guy with the money
was talked into doing it in mild steel, and coating it.  The header
failed, and he was out over 10k.  An currently sit's on about 50
completed pieces of junk. And enough material to make 150 more.

So with a quality material like 321 stainless or inconel you know it
will work, it will hold together because the material can handle the
temperature, and designed properly with slip fits for long runners or
short runners with no slip fit's you should have a piece that will go a
long time without maintenance.  Also supporting the turbo properly. 


If you decide to use mild steel, or really anything other than 321 or
inconel it is just a gamble.

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of CaptMagu at aol.com
Sent: Friday, November 05, 2004 11:52 AM
To: joe.pizzimenti at gmail.com; gregsj2 at comcast.net
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] RS2 Tubular Headers

Joey

That's why I chose to go with mild steel and not stainless. I will have
to

ceramic coat this one but that's a good thing anyway. What's the price
and

source on the methanol ijection you were talking about on Audiworld?
Thanks.

Hap
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