[Audi20V_Kruemmer] Re: [s-cars] Primary size for a tube header?

[Trevor Frank]

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So it looks like 1-5/8 with .049 wall, this will put the i.d. at 1.53in.
This is very close to the below header and it is very close to the stock
exhaust port diameter.



-----Original Message-----
From: joeamund [mailto:joeamund at online.no]
Sent: Saturday, September 20, 2003 12:51 AM
To: Audi20V_Kruemmer at yahoogroups.com; Trevor Frank
Cc: s-car-list at audifans.com
Subject: RE: [Audi20V_Kruemmer] Re: [s-cars] Primary size for a tube
header?



Trevor,
The famous(at least quickest Quattro in Scandinavia) green S2 in Sweden
with
730HP(7500 rpm)/819Nm (6000 rpm) @ 2 barg boost and a quarter  mile
result of
10,5 sec/140 mph is using ID 1,54" by 21" length primary runners and an
ID 2,5
" by 7" collector on his selfmade tubular header. His selfmade intake
manifold
has a plenum volume of 1,5 times engine volum and ID 3,55" throttle
body(
Porsche 928 S4), T72(AR 0,96 exh)turbo, 990 cc Kinsler injectors ,Bosch
FC3CS
spark plugs, and an  AEM Engine management system using 5 coils at the
firewall with powerstages all self componed.

I am trying to find a link to his extreme engine building, and will post
it as
soon as I get hold of it.

Best regards Joern,MTM RS




>===== Original Message From Audi20V_Kruemmer at yahoogroups.com =====
>Trevor, I'll measure my SQ EM runner length and i.d and will email you
>right afterwards.
>
>Cheers,
>
>Mihnea
>
>At 13:50 19/09/2003 -0700, Trevor Frank wrote:
>>This is a multi-part message in MIME format.
>>--
>>[ Picked text/plain from multipart/alternative ]
>>
>>So I am getting fairly serious about building my equal length tube
>>header.
>>
>>
>>
>>First question:
>>
>>Does anyone have any data, i.e. lengths and tubing i.d. for a lehman,
>>mtm or audi motorsports tube header or even the SQ em?
>>
>>
>>
>>Second Q:
>>
>>What size for the primary tubes.  Anyone using stepped tube sizes.  I
>>can get 321 s.s.180 bend's in 1.75" x .049 wall for pretty cheap like
30
>>ea.  Approx 5 or so needed.  The stock exhaust ports would match up
with
>>1.625 x .049 wall perfectly.  They are more like $58 ea for the bends.
>>I am wondering if loosing the velocity will be an issue.
>>
>>
>>
>>More Q's:
>>
>>Anyone have recommendation on exhaust velocity, I have talked to some
>>people, turbonetics and Innovative but have not gotten any answer with
>>much confidence.  I am wondering if anyone has bothered to fill out
>>burns stainless's engine exhaust analysis sheet.  To have a header
tube
>>size and configuration for out motors anylised.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>I have the material for the flanges, and have done the cad and cam for
>>it.  316 stainless steel approx .48 in thick.  If anyone wants one let
>>me know.  I will be running them sometime next month.  I will also be
>>running inlet flange to the turbo and outlet flange from the turbo,
>>k-24/k-26.  I have enough material to run approx 5 sets of exhaust
>>flanges and a few sets of turbo flanges.
>>
>>
>>
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=======
Notice: This e-mail message, together with any attachments, contains
information of Symyx Technologies, Inc. that may be confidential,
proprietary, copyrighted, privileged and/or protected work product,
and is meant solely for the intended recipient. If you are not the
intended recipient, and have received this message in error, please
contact the sender immediately, permanently delete the original and
any copies of this email and any attachments thereto.