[alfa] Frwapping noise at 17000 RPM

[Zachary Baker <zachtb@xxxxxxxxx>]

I have an odd noise coming from the engine bay of my '89 Spider. It is a quick buzz or rapping sound and happens only at 17000 RPM. It is not always noticible when accelerating. It is a quick burst (about 1 second) when the RPMs drop quickly, or a constant sound if I keep the RPMs right at 17000. The noise does not happen haphazardly. It is there every time I pass 17000 RPM except when accelerating quickly May be there even then-just cannot hear it.
I have already checked for fan/shroud clearance. Doesn't look like that is a problem. 
I do have some exhaust noises, but this doesn't seem to be one of them.
I did just replace the clutch/bearing/throghout/pressure plate, but the noise happens whether the clutch is in or out. In gear or out.
 
Has anyone had this problem?  Thanks in advance. 
 
zach
'89 Spider (not pretty, but getting there)
The New Yahoo! Shopping - with improved product search
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided