EGT Probe Location: Pre-Turbo or Post-Turbo?

The most important step of installing GlowShift’s Exhaust Gas Temperature Gauge to your vehicle is selecting the location of the EGT probe. To receive optimal statistics from your …

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The most important step of installing GlowShift’s Exhaust Gas Temperature Gauge to your vehicle is selecting the location of the EGT probe. To receive optimal statistics from your Pyrometer Gauge, it is recommended to install the EGT probe at the pre-turbo location of your exhaust manifold. Many users may tend to install the EGT probe at 12 inches past the location of the turbo which results in misleading temperature statistics. To show the difference between the two EGT probe locations, we installed two EGT probes to our test vehicle, 2006 Dodge Ram 5.9L 24 Valve Cummins with a 5 inch exhaust pipe. The EGT probe that was installed 12 inches past the turbo read about 300° – 500° F cooler than the EGT probe that was installed at the pre-turbo location, which read about 800° F. This is an extreme difference in the temperature being displayed on your gauge which is inaccurate from the actual performance of the EGT. If your EGT is running too hot and you are unaware, it can lead to major engine break down including burning oil which leads to coking and melting internal components such as the pistons and crack heads.


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