AeroVee Engine Sensor Setup

AeroVee Engine Sensor Setup

AeroVee (Sonex) Sensor Settings

AeroVee uses the following sensors:

CHT: Type-K or Type-J Thermocouple (Specified at ordering)
EGT: Type-K Thermocouple
Oil Pressure: VDO 5-bar sensor 360-001
Oil Temperature: VDO 150-degree Celsius sensor 323-055


Oil Pressure:

NOTE: OIPP_PU must be turned to the ON position on your RDAC
Probe type: automotive, resistive
Probe resistance: 200 ohms
Resistance increases with pressure
Probe pressure range: 80 PSI / 5 bar depending on your unit settings

Oil Temperature:

Probe type: Standard NTC

EGT and CHT:

The EGT and CHT probes are setup in the TC Channel Scan menu, found in the engine monitoring setup menu
Set the appropriate channel on there based on which sensor is connected to which channel. The probe numbering happens in sequential order, meaning if TC 1 is set to EGT, TC 2 is set to CHT, TC 3 is set to EGT, and TC 4 is set to CHT, then TC 1 and 3 will be EGT 1 and 2 respectively, whereas TC 2 and 4 will be CHT 1 and 2 respectively. The image below represents a typical setup for a 4-cylinder engine. Unused sensors, or ones that are being utilized for other functions should be set to a TC UNI number. It doesn't matter what this number is.
CHTs can be set to Type K and J sensors.

MGL Blaze and Vega:

Oil Pressure (Pull-Up must be turned on):

MODEL: 5 bar

Oil Temperature (Pull-Up must be turned on):


EGT and CHT:

NOTE: Without an RDAC, you are limited to a total of 4 thermocouple sensors. For example, this would mean 2x EGT and 2x CHT, or 4x EGT and 0x CHT.
EGT Setup:
EGT CHANNELS: Set to appropriate number of channels

CHT Setup:
CHT CHANNELS: Set to appropriate number of channels


Oil Pressure:

MODEL: 5 bar

Oil Temperature:


EGT and CHT Setup:

EGT/CHT CHANNELS: Set appropriate number of channels based on sensor count

Settings for all MGL products:


The AeroVee engines will typically have you pull your tach feed off the charging system. If you have a 10-Amp charging system, set your pulses per revolution to 5. If 20-Amp, set to 6. Many Jabiru engines will use the same settings.


Oil Temperature:

Temperature reads very high:

These sensors are a thermistor, and ground via the engine case. As the resistance goes down, the temperature reading will go up. A very high temperature reading means the sensor resistance is low, or at 0 which effectively "grounds" the channel on the RDAC or instrument. Unplugging the sensor should in turn drive the channel very low. If this does not happen, verify your wire is not shorted to ground by removing the wire from the RDAC / instrument. If the condition does not improve, the RDAC / instrument may need to be replaced.

Temperature reads very low:

The sensor resistance goes up as the temperature decreases. An erroneously low temperature reading can be an indication of high resistance on the wire (a pinched, cut or corroded wire), poor ground bonding between the sensor and engine case, a faulty sensor, or a faulty RDAC. To isolate the issue, unplug the sensor and ground the wire to the engine case. If the temperature shoots high, then the wiring is okay and the RDAC likely is too. This would likely be a sensor fault. If the temperature does not go high when grounding the wire to the engine block, the wire may be compromised. Install a temporary jumper wire at the instrument or RDAC then ground that jumper. If there's still no change, then suspect a faulty instrument or RDAC.

Oil Pressure:

Pressure reads very high:

These sensors ground via the engine case and increase in resistance as the pressure goes up. A very high pressure reading means the sensor's resistance is high, which can be the cause of a compromised wire or sensor, or poor ground bonding between the sensor and engine case. Remove the wire from the sensor and ground the wire to the engine case. If the reading drops to 0, then check the sensor's grounding to the engine and if good, replace the sensor. If the reading does not change, then the wire is possibly faulty. Use a jumper wire to ground. If there's still no change then suspect faulty RDAC or instrument. If the reading drops to 0 then replace the wire.

Pressure reads very low:

A very low pressure reading means the sensor's resistance is low, which can be caused by a faulty sensor, a wire that is shorted to ground, improper RDAC/instrument configuration or a faulty RDAC/instrument . The first step is to ensure the OIPP_PU switch is turned ON for the RDAC or if using a Single instrument, ensure the pull-up switch for the channel is on. Then, remove the wire from the sensor and see if the pressure jumps up. If it does then replace the sensor. If it does not, then remove the wire from the RDAC or instrument and check the same. If it still does not jump up, double-check your pull up switch and suspect a faulty unit.


Temperature Inaccurate:

Ensure your channels are appropriately configured (TC Channel Scan on iEFIS, EGT/CHT Setup on all others) and that your screen designs on iEFIS are properly set. 

If it is only one channel that is wrong, swap sensors with another channel. If the issue follows the sensor, replace the sensor. If the issue stays on the same channel regardless of sensor, suspect a faulty unit.


Readings jumpy or inaccurate:

There are two wires that you can pull tach off of on your AeroVee. Switch wires and see if that solves your issue. If not, adjust your RPM gain up and down until you get a stable RPM. You can also try turning on the FILTER switch on the RDAC and instrument to try to filter out interference. 

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