Bully Dog 40300 PMT advanced vehicle downloader, controller, monitor and gauge - Manual (Page 21)

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PMT INSTALLATION
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INsTaLLING THe pyROMeTeR pROBe
In this section you will drill and tap the Pyrometer Probe in the exhaust, either pre-turbo or
post-turbo as a means to collect exhaust gas temperatures (EGT). Exhaust gas temperatures
indicate how hot the motor is getting and can be used to set safety defueling parameters (see
Operating Instructions Set Pyrometer defuel Level on pgs. 51-52).
pOsT-TURBO vs. pRe-TURBO
You must decide between mounting the Pyro Probe either post-turbo or pre-turbo. The difference
in location determines what temperatures will read on your PMT. Pre-turbo mounting is generally
recommended because it provides more accurate EGT readings; the PMT is also capable of running
both pre and post-turbo pyrometers simultaneously.
It is recommended that you mount both a pre-turbo and a post-turbo Pyrometer Probe if a vehicle
is running more than 50 horsepower over stock. On screen, the PMT can display Pyro 1 and Pyro 2
which correspond to the Pyro 1 and 2 locations on the PCH board. It is very important to note if Pyro
1 is displaying pre or post-turbo exhaust gas temperatures, and the same for Pyro 2.
If installing a single Pyrometer Probe it is recommended that you install the probe pre-turbo on the
Ford Power Stroke and GM Duramax, and post-turbo on the Dodge Cummins.
Whether you mount post-turbo or pre-turbo, you need to monitor your temperatures; know what
is safe and when to back off. Use the Pyrometer Calibration Procedure in the Appendix for these
instructions to figure out what your safety limits are.
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