Suggestions for Adjusting WOT fuel?

[Roger Heflin]

I have been adjusting my wot fuel.  I have was removing 3% on the wot
fuel map in the prom, as far as I can tell 3% here does not actually
mean removing 3% fuel, but when I was doing this, I did lower the
injector pulsewidths about .1 ms (pulsewidth about 7.5 ms range).  The
graph of the injector pulsewidths is very clearly lower each time fuel
is removed.  The O2's sensor readins don't appear to have changed any
over the various runs, my 60ft times did get better each run I removed
fuel, so I do feel I was doing something that was improving things.
The O2's are running 860-880 range, so my guess is I have a ways to go
to get things down.  I know the O2 are pretty crude for measuring
fuel, but if I am targeting say 12.5:1 what is a safe O2 reading to go
for?  I know others with my car tune for 810mv (they used a dyno), and
others have said do worry about burning a piston until below 800mv, is
this a pretty safe set of assumptions?  If I should mostly be safe
above 800mv I will slowly remove fuel and attempt to use the times to
determine if things are improved.

			Roger
			93 Z28