7A ex cam

Bernie Benz b.benz at charter.net
Tue Apr 29 10:47:21 EDT 2003

Apparently the use of the 7A ex cam in a 3B/AAN originated and was discussed
to some length on the S-cargo list some 1.5 years ago.  Chris Miller
forwarded some of the discussion to me at that time and I got involved to
some extent with a few contrarian opinions, which were copied to the 200-20V
list at that time.  I'll Fwd to you some of my input on the subject, FYI.


> From: "Brandon Rogers" <brogers at terrix.com>
> Organization: Terrix Financial
> Reply-To: "Brandon Rogers" <brogers at terrix.com>
> Date: Tue, 29 Apr 2003 09:44:40 -0600
> To: <200q20v at audifans.com>
> Subject: 7A ex cam
> This is a multi-part message in MIME format.
> --
> [ Picked text/plain from multipart/alternative ]
> Greetings
> I've heard the 7A exhaust cam may be an upgrade when used in the 3B and I'm
> curious where this notion came from.  Has anybody dyno tested using the
> different cams?  Does anybody know that the lobes are cut to produce better
> power in the 3B?  If so why wouldn't Audi have used it?  Did it sacrifice low
> end for high end?  My recollection is the 7A motor is pretty gutless down low
> - here in Denver around 5200 ft at least.  I'm in the process of putting a 3B
> together for installation into my '84 urq and will have the opportunity to use
> the 7A cam if I choose.  All input appreciated.
> Brandon

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