im getting some kinda conroller for my mimi-me swap. either a field v-sfc or an apexi v-afc. i also made an A/F meter gauge and right now im running somewhat rich, so that's good. but the O2 sensor output only makes sense when it's in closed loop. what do i need to setup the controller myself? how can i deal with full throtle and make sure it doesnt lean out since it will be running in open loop and O2 sensor reading wont be right?

 

The controller well allow you to change the duration of your injector duty cycle depending on what rpm your at.

Most peeps end taking something like that to a dyno, to get the best performance out of it, and less risk of engine damage.