Ski in NC
Technical Guru
Stick on dots, different coatings, surfaces finishes, etc., all have different emissivities, and that changes how the IR gun reads. Try reading a hot stainless shiny surface pipe and you will know what I mean!! Emissivity is a part of the radiative heat transfer calcs and that is the realm the IR gun operates in. In general, painted, rusty, crusty, dirty surfaces read ok. Shiny, not so well.
That's the reason in power plants and other industrial places, motors and things you want cool are painted dark. Things you want to stay hot are wrapped in shiny al wrap. You won't see dark colored insulated steam pipes, always shiny.
Baker, I'll bet you have a flaky gauge/sender/circuit. A B motor comes with a 180 tstat and that means it starts opening around 180 and is full open around 190. About a 10F operating band. If you shot it at 180F at high cruise you should be in good shape. Very rare for cooling issues to "come and go". It's either fouled or it is not.
Next time out shoot and compare.
Paper assh0les should do the trick!!
That's the reason in power plants and other industrial places, motors and things you want cool are painted dark. Things you want to stay hot are wrapped in shiny al wrap. You won't see dark colored insulated steam pipes, always shiny.
Baker, I'll bet you have a flaky gauge/sender/circuit. A B motor comes with a 180 tstat and that means it starts opening around 180 and is full open around 190. About a 10F operating band. If you shot it at 180F at high cruise you should be in good shape. Very rare for cooling issues to "come and go". It's either fouled or it is not.
Next time out shoot and compare.
Paper assh0les should do the trick!!
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