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These parameters allow the ECU to control the use of nitrous oxide or water/alcohol injection.  There are three nitrous controls - Nitrous1, Nitrous2 and Nitrous3.



Nitrous Control - enables the control of nitrous. Each function (nitrous, water/alcohol injection, dual boost, generic, reverse lockout) will enable / disable different criteria for the output.  eg the reverse lockout only uses vehicle speed to determine when to activate the output.



Arming Input - specifies which ECU pin is used to arm nitrous.


Invert Arming Input - reverses the arming input so that nitrous is armed when the switch is on.


Nitrous1 and Nitrous2 can share the same arming input.


Not all ECU models will have the internal circuitry to use all inputs.  For example, the PRC/PRD ECUs do not have the circuitry for the VTEC pressure switch, and this input cannot be used.



Output Control - specifies which ECU pin controls the nitrous solenoid. Important: the ECU cannot sink enough current directly to control a solenoid. A relay must be used between the ECU and solenoid to prevent damage to the ECU.


Invert output - reverses the output pin behavior. Note that this does not alter the electrical configuration of the pin (usually the pin is grounded when the output is active).


Nitrous1 and Nitrous2 can not use the same output.  In this case, Nitrous1 will take priority over Nitrous2.


Not all ECU models will have the internal circuitry to use all outputs.



Conditions - specifies the conditions which must be met before the output is switched on.


Maximum throttle should normally be over 100% to ensure the output is triggered if the TPS reads over 100% at full throttle.


Maximum vehicle speed should be set to 255 kph to ensure the nitrous does not shut down at 158 mph / 255 kph.


Knock count sets the maximum knock count, above which nitrous will shut down.  A count of 0 disables the shutdown.


Fuel & Ignition




This specifies the fuel and ignition changes when nitrous is active.


Note that fuel may be removed (useful with water/alcohol injection) by entering a negative value.


Ignition timing will be retard if negative values are used, and advanced if positive values are used.


Fuel Settings


Do not make nitrous changes without using a wideband lambda meter to determine the correct air/fuel ratio. As a general guide, the following extra fuel is necessary:


Nitrous Jet

Fuel Value