7A ex cam

[Brandon Rogers]

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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 di=
fferent cams?  Does anybody know that the lobes are cut to produce better p=
ower in the 3B?  If so why wouldn't Audi have used it?  Did it sacrifice lo=
w 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 putti=
ng a 3B together for installation into my '84 urq and will have the opportu=
nity to use the 7A cam if I choose.  All input appreciated.

Brandon

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