cnoe Posted October 15, 2015 Report Share Posted October 15, 2015 The best spot is under the wing, just outboard of the gear in an inspection panel. That is where the factory put them in the J+ models and for good reason. Out of the sun, out of the exhaust, and out of the engine heat streams. It is also out of the way of getting bumped easily. Running the wire takes less than an hour if you already have an interior panel out. I put a Davtron probe on my left wing many years ago, and just added a JPI probe under my right wing at the original factory OAT location. It is worth doing it properly, especially if you fly in IMC where you'd really like to know if it is 31 degrees or 33 degrees! This is exactly what I did as well, but with the Davtron under the right wing and the JPI under the left. I was told that mounting in the vent opening would be just a bit warmer though I can't confirm that. The Davtron readout is not adjustable but mine read 32 F in ice water prior to installation. The JPI is adjustable and is matched to the Davtron. Let me add that if you're doing this yourself or assisting, keep all the probe wiring as far as possible from the ignition leads or you'll end up with jumpy EGT and CHT readouts on your display. 6" seems to be enough separation. Sent from my iPad using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
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