How to Install an EGT Probe in your manifold

Exhaust Gas Temperature (EGT) Probe placement in the exhaust path requires special attention. If it is closer than 1½ inches to the cylinder head, probe life will be limited, too far away the probe will be less responsive. Should there be doubt concerning in which exhaust tube or specific placement of the probe, you should check with the engine manufacturer or your engine builder.

There are two basic ways EGT probes are installed in multiple cylinder engines either for monitoring a bank cylinders or each individual cylinder. Monitoring a bank of cylinders give you information on the over all exhaust gas temperature generated by the cylinder bank. For example when installed in a "V8" cylinder engine two EGT probes can be used by placing them in the exhaust header collector just past the point where tubes from one side become common. The probes are connected to high temperature thermocouple wire and a connector and then to a dual channel meter for monitoring. The consideration to this installation is the distance from the combustion chamber, making the EGT reading lower and giving an average of the four cylinders in each bank. This keeps the ability to gather the necessary temperature information simple.

If you require more exact temperature readings you may consider installation of probes near combustion chambers. This maybe be requirement in situations where you have the ability to tune fuel supply or air for each cylinder. This is more complicated and requires proper installation and placement of the probes. The constancy in probe distance from combustion chamber is very important in order to get reliable readings. If you require more exact temperature readings you may consider installation of probes near combustion chambers. This maybe be requirement in situations where you have the ability to tune fuel supply or air for each cylinder. This is more complicated and requires proper installation and placement of the probes. The constancy in probe distance from combustion chamber is very important in order to get reliable readings.