NSP Engine Configuration

Engine Configuration

Engine Configuration

The Engine Configuration node contains basic configuration information about your engine. 

Engine Information

Engine Capacity

The Displacement of the engine. The units for Displacement are selected in the NSP software under Preferences > Units Options

Engine Type

The type of engine being used. Select from Piston 4 Stroke, Piston 2 Stroke, and Rotary engines.

Number of Cylinder/Rotors

The number of cylinders or the number of rotors.

Compression Ratio (Nexus ECUs only)

The static compression ratio of the engine. Used for estimation of cylinder pressure at TDC and generates the 'Estimated Cylinder Compression Pressure' channel.


The aspiration type of the engine. Used to estimate the Engine Pressure Ratio if no EMAP Sensor is enabled.
  1. Naturally Aspirated - EMAP is equal to baro.
  2. Supercharged - EMAP is equal to baro.
  3. Turbocharged - EMAP is equal to baro until MAP is above atmospheric, then EMAP is equal to MAP.
If an EMAP sensor is enabled, it is used to calculate Engine Pressure Ratio instead.

Max Cranking RPM

The RPM value below which the engine is considered to be cranking. Above this value the engine is considered to be running. Default 380rpm

Engine Geometry

Odd Fire Engine

Normally disabled. Only enable this function if your cylinder firing angles are not symmetrical. i.e. they fire at odd (uneven) angles. When disabled (most engines) the ECU will assume an even fire engine and will automatically calculate the firing angles. When enabled the per-cylinder TDC Angle will become available for adjustment and will be used by the ECU. (Default = Disabled)


Enter the Firing Order of the engine here. This is used to determine the sequence in which the injector and ignition outputs will fire. Note that injector and ignition outputs are to be wired in cylinder number. i.e. output number goes to cylinder number. 

TDC Angle

Only used when the Odd Fire option is enabled. The firing angle of each cylinder is entered so that fuel and ignition events are sequenced at the correct time. See 'Odd Fire Engine' for more details.

Bank Info

If more than one engine bank is being used, each cylinder can be assigned a bank. The bank value is used by any function that requires banked cylinder information. Eg, O2 Control function when there is an O2 Sensor in each Bank to know which cylinders are controlled by which O2 Sensor, Nitrous control when per-bank corrections are required, Knock Detection and Control etc. Up to 2 engine banks are supported.
Any 'V' style engine such as a V6 or V8 has two banks of cylinders. Most inline cylinder engine such as an Inline 4 or Inline 6 engine have one bank of cylinders, unless the sensor arrangement allows for 2 banks such as in twin turbo applications.

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