Innovate Motorsports ST-12 - Manual (Page 10)

10
Install the bung downstream from the turbo before the catalytic converter. The high exhaust pressure
before the turbo interferes with the lambda measurement and the high exhaust temperatures
encountered there can damage the sensor.
Sensor placement before the turbo is not recommend because of negative effects caused
by back pressure and high temperatures.
Do NOT install the Bung below the 3 o'clock or 9 o'clock position. Condensation can form
in the exhaust pipe and permanently damage the sensor. 6 o’clock is the absolute worst position
to mount the sensor.
Wide band oxygen sensors – like the one shipped optionally with the LC-1ST – are
designed to work with unleaded gasoline. Using them with leaded gasoline will significantly
reduce the lifespan of the sensor. The reduction is directly proportional to the metal content of
the fuel. In most cases, a wide band sensor will provide accurate measurements somewhere
between 50 hours and 500 hours with leaded fuel.
WHEN INSTALLED IN THE EXHAUST, THE OXYGEN SENSOR MUST BE CONNECTED AND
OPERATING WITH THE LC-1ST WHENEVER THE ENGINE IS RUNNING. AN UN-POWERED
OXYGEN SENSOR WILL BE DAMAGED WHEN EXPOSED TO EXHAUST GAS.
The maximum temperature of the sensor at the bung (the sensor hexagon) should not
exceed 500
o
C or 900
o
F. If these temperatures are exceeded in your application install the
Innovate Motorsports’ Heat-Sink Bung extender (HBX-1).
The bung extender is recommended for situations where airflow is restricted or the encountered
heat is higher than a heat sink can handle.
Depending on the climate and the sensor position in the exhaust, condensation water can
form in the exhaust pipes. This condensation water could then be blown by the exhaust stream
against the hot sensor when the car is started. The resulting heat shock can permanently damage
the sensor.