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

[joeamund]

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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