MoTeC M84 - Manual (Page 19)

MoTeC Installation 17
The plenum take off point should be at a position that best represents the
average manifold pressure and has minimal pressure pulsations. A small
restrictor may be needed at the manifold end of the hose to help reduce
pressure pulsations. The take off point should not be teed in with other items
such as idle speed control valves as they can affect the pressure reading.
If used for Barometric Pressure Sensing
Use a 105 kPa sensor.
Vent the sensor to the atmosphere with the port facing down.
Avoid mounting at a point where air buffeting occurs Any pressure
fluctuations will directly affect the mixture.
It may be desirable to sense the pressure at the air intake as the pressure
may vary due to aerodynamic effects.
Air Temp Sensor
The Air Temperature sensor is mainly used to correct for air density change
due to air temperature variation.
The sensor contains a temperature dependant resistor and is designed for
high speed response in an air flow.
The Air Temp sensor must be placed to measure the air temperature before
the butterfly (and after the intercooler on turbo charged engines).
Avoid placing the sensor too close to the stand-off vapour in a multi-runner
manifold as this will cool the sensor and give a false reading.
The ECU Sensor Setup parameters must be set to indicate the particular type
of sensor.
Engine Temp Sensor
The Engine Temperature sensor is mainly used for cold start enrichment.
The sensor contains a temperature dependant resistor and is designed for
water immersion.
The ECU Sensor Setup parameters must be set to indicate the particular type
of sensor.