If the RPM fluctuates with nitrous on or off, it won’t flutter on and off unless the RPM varies by this much.
Above this RPM, nitrous will be turned on.
Above this RPM, nitrous will turn off.
Above this Coolant temperature, nitrous will be disabled.
Above this Coolant temperature, nitrous can be turned on.
Above this throttle position, nitrous can be turned on.
If the Nitrous is disabled from being too lean, and throttle is closed beyond this, it will be re-enabled again – this is to prevent the nitrous from turning off and on repeatedly while the throttle is held open.
After the Nitrous is turned on, a few moments of time are allowed to let the AFR settle, in case there is a quick lean bit at the beginning of Nitrous operation.
If the AFR is leaner than this for the prior “Lean disable time” while Nitrous is on, the Nitrous will be disabled.
If the AFR is lean for this much time while Nitrous is on, the Nitrous will be disabled to possibly protect the engine.