Every engine and cylinder performs different. Many factors are involved e.g. elevation/temp, rpms, timing, fuel, intake and exhaust setup, compression ratio...
An A/F meter would be better for fine tuning.
Stoichiometric mixtures are only used under light load conditions. For acceleration and high load conditions, a richer mixture (lower air/fuel ratio) is used to produce cooler combustion.

1990 LWB RS A/T
1990 LWB Base A/T
1991 LWB LS A/T Going...Going...