FiTech EFI – Nitrous Instructions

FiTech EFI – Nitrous Instructions

If the AFR is lean for this much time while Nitrous is on, the Nitrous will be disabled to possibly protect the engine.
If the AFR is leaner than this for the prior “Lean disable time” while Nitrous is on, the Nitrous will be disabled.
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 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.
Above this throttle position, nitrous can be turned on.
Above this Coolant temperature, nitrous can be turned on.
Above this Coolant temperature, nitrous will be disabled.
Above this RPM, nitrous will turn off.
Above this RPM, nitrous will be turned on.
If the RPM fluctuates with nitrous on or off, it won’t flutter on and off unless the RPM varies by this much.
If the N2O MAX RPM is used to turn off nitrous, this time will delay the reenable of nitrous to allow time for the gear shift to complete.
Fuel can be added or subtracted when nitrous is turned on to help get the AFR closer to optimal. Often times, fuel needs to be removed because it displaces air intake through the throttle.
A richer target should be set with nitrous. This is that target when the nitrous is on.
Spark advance should be retarded when nitrous is on. How much depends on the engine and nitrous combination.
If the signal that tells the ECU to enable nitrous is a +12V signal, or a grounding signal, set this value accordingly.
If the ECU is used with a nitrous system, set this accordingly.
If the ECU is to be in control of the relay that drives the solenoids, set this accordingly.
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