My controller runs richer than Dynojets O2 optimizer in the closed loop on a completely standard bike. Same bike same day, one test right after the other, the only thing changed is the O2 optimizer, O2 controller & just the O2 sensor no PCV or map change.
Dyno Jet only claim their O2 Optimizer targets 13.6:1 with a PCV fitted with the open loop mapping in the closed loop area set to +6, testing one device against each other on a completely standard bike with no map the Optimizer is 14:1. Increase the open loop +6 in the closed loop area on the cruise my controller will show a closed loop A/F ratio of 13.2:1 & Dyno Jets O2 Optimizer will show 13.6:1.