You need to know some critical things about oxygen sensing.

Based on the experiences so far:

• The oxygen sensor has to be the type with a heater and MUST be heated for at least one minute before the race.
• The current draw at startup is about 7 amps, so if you have two on a V8, then the battery must be able to supply 14 amps above the normal load it would have with starter motor, ignition , transbrake etc.
• The exhaust system MUST be fully welded so no fresh air can be drawn into the exhaust gas. Otherwise it will give a FALSE LEAN condition. If you don't have a fully welded, air tight exhaust system, then you are wasting your time.
• Leaded fuel will eventually destroy the sensor. The actual time to degrade is unknown. Some say 40 hours. Some also say that if you get a used one from a wrecker, then it will last even longer. This is all speculation, but there may be some truth in it.
• FXL DATA Pty Ltd does not supply oxygen sensors. Customers are expected to provide their own. Commodore sensors are what are normally used.
• The standard Commodore sensor has 4 wires.
• Two wires are for the heater. They have the same colour insulation and have less than 2 ohms resistance between them. Earth one and wire the other to a switch to +12 volts.
• One wire is the signal wire. This is connected to the logger. It produces less than 1 volt at less than 0.000002 amps. Thats 2 microamps. The logger buffers the voltage before sampling it.
• There is one wire that is connected to the body of the sensor. This should be connected to earth.
• The insulation is probably Teflon. It can be difficult to strip.
• The wires may be stainless steel and are difficult (nearly impossible) to solder. It may be better to crimp the wires.