Haltech IG5 - Manual (Page 15)

11
14mm x 1.5
The air temperature sensor is used to compensate for changes in air density due to air
temperature. This effect is most noticeable in forced induction engines. The Haltech IG5 will
allow compensation for ignition timing using the signal received from the air temperature
sensor.
The sensor should be mounted to provide the best representation of the actual temperature of
the air entering the combustion chamber, ie. after any turbo or supercharger, and intercooler,
and as close to the head as possible. The sensor needs to be in the moving air stream to give
fast response times and reduce heat-soak effects.
Note: The Haltech air temperature sensor will read temperatures up to 120° C
and temperatures above this will be interpreted as a fault condition. The air
temperature after some turbocharger's and superchargers can exceed this. If
this occurs with your engine you should consider fitting an intercooler to
reduce air temperature and increase charge density. If this is not possible then
the air temperature sensor should be placed upstream of the turbo or
supercharger to monitor ambient air temperature.
Once a suitable position has been located for the air temperature sensor a hole should be
drilled and tapped to accept the sensor. Remove the manifold or inlet tract from the engine
before machining the sensor mount. Do not allow any metal particles to enter the inlet
manifold of the engine as these will be drawn into the engine and damage it. Wash all
components thoroughly before reassembly.