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Dorsal
04-11-2009, 01:39 PM
Looking for suggestions on mounting and plumbing a fuel pressure sensor for a 912ULS and a Dynon EMS. I am assuming I need some type of T fitting after the fuel pump with a restrictor and a tube back to the sensor attached to the engine mount.
Any feedback appreciated

Nathaniel
04-30-2009, 07:18 AM
Not sure if this is what you need - from the D180 installation guide.

Fuel Pressure Sensor
First, mount the fuel pressure sensor to a fixed location using an Adel clamp or other secure method. The fuel pressure sensor must not be installed directly to the engine due to potential vibration problems. Next,
connect the fuel sensor to the engine using appropriate hoses and fittings. Its pressure port has a 1/8-27 NPT pipe thread fitting; you may need adapters to connect to the pressure port on your engine. Locate the correct fuel pressure port for your engine. This port must have a pressure fitting with a restrictor hole in it. This restrictor hole ensures that, in the event of a sensor failure, fuel leakage rate is minimized, allowing time for an emergency landing.

Carbureted engines: Use the 0-30 PSI sensor (Dynon P/N 100411-000). Crimp a standard ¼” female Faston onto one of the ground wires (see
the Grounding section on page 2-2) coming from the 37-pin harness. Crimp another ¼” female Faston onto the brown wire from pin 8. Push the two Fastons onto the two terminals on the fuel pressure sensor. Polarity is not important. If you are converting from a GRT EIS system, you must disconnect the external resistor pull-up from the fuel pressure output. This will make the sensor output equivalent to the sensor supplied by Dynon Avionics.

Injected engines: Use the 0-80 PSI sensor (Dynon P/N 100411-001). Crimp a standard #8 ring terminal onto the brown wire from pin 8. Unscrew the stud cap from the threaded stud. Place the ring terminal on the stud and secure the cap down sandwiching the ring terminal. If the connection between the sensor and your engine is non-metallic, you must connect the sensor case to ground through other means. The best way to accomplish this is by sandwiching a groundconnected ring terminal between the sensor and the mating fitting. Due to vibration issues, never connect the sensor directly to engine. If you use Teflon tape or other seal, ensure the sensor casing still maintains a good connection to ground.

For the D180, Pin=8, Color=Brown, Function=fuel sensor