Valve timing question

[Stuart Thomson <stuart.thomson@domain.elided>]

Hi all,

I've recently finished my first engine rebuild, and have a few questions.

The engine seems to produce a good amount of torque at lower RPM, but 
seems to "flatten out " at higher RPM.  Any ideas as to what could be 
wrong.

Here's the background info;

The motor is an agglomeration of a good 1.8L Giulietta and a bad 105 
1750 (shot rings and bearings) engines. The sump, oilpump, and cams were 
reused from the 1750, the rest is the Giulietta's.  I believe that the 
problem may be with the camshaft swap from 105.20 to 105.48, and that 
the timing marks may be different from one to the other.  Ignition 
timing has been checked several times, I get occasional spitting back 
through the carbs, and the carbs have been tuned and balanced by an 
expert.

A while ago there was some discussion as to the best way to extract a 
little more power from a 4 cylinder motor.  One of the things mentioned 
was to change the valve timing to produce more overlap.  If I assume 
that I've done the reverse, should I expect the reverse results?

How long after new rings should an engine take to settle in?  It's had 
about 200 road miles and a pretty gentle track day (80 ish miles)?


Cheers
Stuart
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided