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JPI EDM 790 JP Instruments Aircraft Engine Monitor, JPI Rebate
EDM 790 JP Instruments

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The EDM 790 is the brand new dual screen twin engine management system by JP Instruments. It comes with functions for EGT, CHT, Voltage, Shock cooling, Span (highest to lowest EGT), EGT Normalize mode, LOP/ROP Function, 20 ft harness, EZTrends graphing software, serial data recording for 25 hours and a 3 year warranty. There is also an optional Fuel Flow that be added below (the model prices are without it).

  • Improved engine efficiency
  • Reduced maintenance costs
  • Greater fuel economy
  • Reduced operating costs
  • Smoother engine operation
  • Proper engine temperatures
  • Longer spark plug life
  • Reduced engine vibration

Attention: We match all competitors listed prices (as long as competitors pricing is current)

Product Code: EDM-790


EDM 790, 4 Cyl [$3,415.00]
EDM 790, 6 Cyl [$4,449.00]
Special Instructions

Aircraft make and model

Add Fuel Flow to EDM 790

Add Fuel Flow with 2 Transducers Includes [$875.00]
Add fuel flow without transducers. [$750.00]
Oil Temp EDM 790

Optional Oil Temperature [$390.00]

Optional TIT [$390.00]
CHT Adapter Probe

CHT M113-3/8 probe adapter for aircraft with existing CHT probe [$110.00]

Optional IAT [$390.00]
Add 8130 Certificate

Add Export Certificate to order, please specify for what location in special instructions [$250.00]
OAT for EDM 760 and 960

OAT for EDM 790 [$195.00]

Features Technical Specs Information
Size 3-1/8 in panel mount 7.5 deep. Weight: 1 LB.
Standard Functions: LeanFind, EGT/CHT, Shock Cooling, Voltage, Differential EGT, Normalize, Long term data module for Data Logging and TIT (if applicable for Engine).
Optional Functions: Fuel Flow, Oil Temperature 1 & 2, Turbine Inlet 2 (TIT-2), Outside Air (OAT) and Carburetor Temperature (CRB).
LeanFind Mode:
automatically. JPI's EDM-760 provides two methods of leaning: lean rich of peak (LEAN R) or lean of peak (LEAN L). With the advent of GAMI injectors it is now possible to set the mixture lean of peak saving fuel with a cooler running engine . The EDM 760 displays an inverted peak graph. Teledyne Continental has recommends 50oF lean of peak for the Malibu.

Leaning Rich of Peak:
Upon reaching cruise configuration, you can use the LF, LeanFind™ mode to identify the first cylinder to reach peak EGT. After cruise power has been established, pre-lean the mixture to about 50° rich of peak. Tap the LF, LeanFind™ button and simply lean. As you begin to lean the mixture, the EDM will check all cylinders using a proprietary algorithm looking for the first cylinder to achieve peak EGT. Do not lean slowly as required by other instruments. Lean aggressively and continuously as you normally do. The EDM will indicate success in finding a peak by displaying the words LEANEST for two seconds, followed by a flashing the column and displaying the value of the EGT of the cylinder that peaked first. The word SET will also be displayed. (With the Fuel Flow Option the current fuel flow rate will be displayed on the right side of the digital display instead of the word SET.) The flashing cylinder will be locked or set into the digital display during the remainder of the LeanFind procedure to allow you to set the final mixture. The peak EGT value is remembered by the EDM and will be displayed as you hold the LF button. Notice that this cylinder is not necessarily the hottest EGT. JPI's quick response, grounded, EGT probes permit the leaning process to take place quickly before there are major temperature changes. If you lean beyond peak, the EGT will drop and the engine will be operating lean of peak. The fuel flow option during LeanFind will simultaneously display fuel flow in Gal./Hr. and EGT. This will permit the pilot to enrichen the mixture while viewing the fuel that will be burned per hour. This is only possible with the JPI fuel flow with quick response fuel flow electronics.
Fuel Flow Option:
After extensive observations of many fuel flow measurement products, JPI's engineers concluded that all the systems presently on the market were not capable of supporting the EGT leaning process due to their slow response times. JPI has developed a fast response system that permits you to simultaneously view peak EGT and minimum fuel flow. As the pilot leans the engine he will see simultaneously fuel flow and peak EGT. Enrichen the engine 20 degrees and note the fuel flow. There will be an optimum EGT enrichment vs. fuel flow for your engine, giving maximum range and power. The EDM Memory will include fuel flow in the data file. A throttle change with GPS interface will display fuel required to next GPS waypoint or destination. The EDM can be set to monitor EGT or Fuel Flow only or both sequentially with the flip of a switch. The bar graph always displays EGT/CHT .
Fuel Used (USD):
How much fuel has been used since you last refueled. This number will always become larger as fuel is consumed. You can instead show the fuel used on a long multi-fuel stop flight and we will see later in this video how to do that.
Fuel remaining (REM)
How much total fuel remains in the aircraft. Only total fuel remaining in the aircraft is calculated.
Hours and minutes remaining (H.M.):
Based on the current fuel flow rate, displays the remaining endurance time. This parameter is most meaningful during cruise. During sea-level climb the fuel flow rate will be almost twice that of cruise and the endurance indication will be about half of actual. On the other hand, during a power reduction descent, the endurance will indicate more time than is actually available when flying at cruise power.
Fuel Required to Way point/ Destination (REQ):
This parameter will be displayed only if your EDM 760 is receiving flight data from your GPS (this is a standard feature which is included with the Fuel Flow option). This will tell you how much fuel is required to get to the next way point or destination programmed on your GPS, based on your current fuel flow rate and present position.
Fuel Reserve (RES):
Fuel reserve when you arrive at your next way point. This parameter will be displayed only if your EDM 760 is receiving flight data from your GPS (this is a standard feature which is included with the Fuel Flow option). This will tell you how much fuel reserve you can expect when you arrive at your next way point or destination programmed on your GPS, at the current fuel flow rate. Distance per fuel units. Both the REQ and the RES indicator lights will be on at the same time. It will tell you your miles per fuel unit such as miles per gallon, miles per liter or miles per pound. It is based on your current ground speed and current fuel flow rate.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Justin November 27, 2015
Reviewer: Justin from Bremerton, WA  
One of the things I like about this 790 over the 760 is that you get to see all of the EGT/CHT temperatures at the top of each cylinder at the same time and I don't have to wait for the instrument to toggle over the cylinder so that I can read the temps. Colorful display is way better than my old LED display. I think I will order the flush mount bracket and step up the look of my panel a bit.

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