[s-cars] Stromung Exhaust, Data?

[Trevor Frank]

Ok, after reviewing the plots again I didn't realize that I was running a bit lean before at the torque peak, so really there wasn't any big change from the Air Fuel Ratio except at idle, it went pretty lean, from 14.7 to 16, this was running open loop, no o2.   And after running this set up on the street and at buttonwillow this weekend the most noticeable difference was the egt's dropped, actually it was Mihnea who called me to the mat on this one, he thought that it should have just lowered the egt's.  I reviewed the data and he was right.  



-----Original Message-----
From: Keith Maddock [mailto:keith-list at maddock.uzipp.com]
Sent: Saturday, April 03, 2004 10:19 AM
To: Trevor Frank; s-car-list at audifans.com
Subject: Re: [s-cars] Stromung Exhaust, Data?

At 22:52 02.04.2004, Trevor Frank wrote:
>So I have before and after wbo2 and hp data.... Remarably at the higher
>rpm's not a lot is gained, but I still have stock cam's so I suspect
>that this is the limiting factor... most notably though is the gain in
>efficiency around max torque, so much so that my programming is off,
>lots more torque and a bit more hp...

Trevor,

Thanks a lot for running these tests and sharing the information.

Do you have dyno plots you can share?

Was the Stromung with the cat or without?


Cheers,
Keith

keith at maddock.com    http://keith.maddock.com/

93 S4 (mit RS2 + BR upgrades) Portland OR
95 968CS (Ring Tool + Daily Driver) Koblenz, DE
1/7 89 GTI  16V (Spare Ring Toy)  Nürburg, DE


=======
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.