Brian,
The ALDA adjust only improves off-idle power. If the car was quick off the line before, turning the ALDA won't help. It's odd that you got no power increase with no change in smoke, though. If it was too rich you would get noticeable smoke, at least off idle. Hmmm. Have you tried timing your car 0-60 on a flat road? The factory spec is 10.9 seconds (at sea level - above 2-3000 feet there is a significant power loss off idle.)
BTW - read my "Free HP" post for something else to check!
Regards,