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Home / Instruments / Engine Monitoring Systems / J.P. Instruments / EDM-350 /JPI EDM-350 Experimental Engine Monitoring System
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JPI EDM-350 Experimental Engine Monitoring System

9 Reviews 27 Answered Questions
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Overview

If all you want is EGT/CHT then the basic kits gives you everything you could want in a compact size with full customization features and the legendary JPI quality and accuracy. The Engine Data Management 350 system is the most cost effective, reliable piston engine experimental EDM instrument on the market. The basic kit includes:
  • EGT - Exhaust Gas Temperature
  • CHT - Cylinder Head Temperature
  • Included - Probes and Harness
  • VDC - Voltage
  • CLD - Shock Cooling on "All" Cylinders
  • ROP/LOP - Lean Find
  • DIFF - Engine Health
  • USB - Data Port built in
  • Data Record - 600 Hrs. at every 6 sec
  • EZTrends - Graphing software, including Google Earth Location
The compact Engine Data Management 350 system (3.5″ square) is the most advanced and accurate piston experimental engine-monitoring instrument on the market. The EDM 350 is not just another black box along for the ride. It is a Flight Engineer, Maintenance Manager, and Backup Instrument. For the price there is nothing that gets close to it. Customize with 17 options, including FF. You can think of the EDM 350 as your personal flight engineer. It’s always there, working in the background, constantly watching over your engine while you concentrate on flying the aircraft. You can make an entire flight without ever pushing a button, if you so choose. Yet your EDM will be monitoring your engine parameters three times a second and will warn you instantly if any parameter exceeds the programmed limit.

Optional fuel pressure functionality available. If selected, order form must be completed that is available under "Documents".

Difference between the Basic/ Full Package:
  • Full comes with the P5- has the capability of AMPS1, fuel pressure, fuel level/tanks, and volt2.
  • Basic package doesn't have any of the above options

Features

  • 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
  • 3 year Warranty
  • Selectable Positions for Linear gauges

Optional Functions

  • RPM - Engine
  • MAP - Manifold Pressure
  • O-T - Oil Temperature
  • O-P - Oil Pressure
  • F-P - Fuel Pressure
  • OAT - Outside Air Temp
  • TIT - Turbine Inlet Temp
  • CRB - Carburertor Temp
  • CDT - Compressor Discharge Temp
  • AMP - Current Amps or Load

Specifications

  • EGT 4 or 6 probes
  • CHT 4 or 6 probes
  • Volts
  • Shock cooling
  • LOP/ROP JPI Exclusive Leaning Mode
  • Fuel Flow (USED, Remaining, GPH
  • Endurance, GPS destination)
  • MAP
  • Oil Temperature
  • Oil Pressure
  • OAT
  • %HP (Requires: OAT, RPM, MAP, & FF )
  • Power connector
  • All required Harness
  • EZTrends
  • Data recording-100 hrs. Download USB
  • 1 GB memory stick
  • Selectable Positions for Linear gauges
  • 3 year Warranty
  • Optional functions
  • CDT
  • IAT
  • CARB Temperature
  • TIT
  • L-R Main - Fuel Quantity, L/R Main
  • V-2 - Second Volts
  • Amp-2 - Second Amps
  • % HP - Requires FF, OAT, and RPM
  • Fuel Flow - Fuel Flow includes:
  • GPH - Gallons per hour
  • REQ - Fuel Required
  • USD - Fuel Used
  • H:M - Endurance Hours and Minutes
  • MPG - Miles per gallons

Documents

  • Frequently Purchased With
  • Customers Also Viewed

Reviews

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Excellent product Use it for few weeks so far and it is nice to know each cylinders are balanced

Bernard T Verified Purchase

JPI 3.25" EDM 350 4 CYL BASIC PACKAGE
September 9, 2022

Magaero L Verified Purchase

JPI 3.25" EDM 350 4 CYL FULL PACKAGE
September 1, 2022

Magaero L Verified Purchase

JPI 3.25" EDM 350 4 CYL BASIC PACKAGE
August 23, 2022

Very easy to install and use. Great product and the price is right. Always been happy with purchases from Aircraft Spruce.

Ronald
February 1, 2019

Great unit. I installed it in my Christen Eagle. Kit is complete with everything you need and other than being time consuming, was a very straight forward install. I just went with the basic CHT/EGT kit, but will add other options later which is simple once the gauge is installed. The display is very nice and bright, and scans automatically through all cylinders. Very easy to understand and use. Finally found a unit that has EGT and CHT in one, color display. Also show system volts.

Ethan W
March 20, 2018

Only negative comment is the unit didn’t come with all of the connectors or pins . Nice unit

Jim P
November 30, 2019

The instrument seems OK. But forget it if you need technical support. Its horrible. Front line person doesnt know anything and back line never return your calls. I should have gone with EI.

Gary G
April 7, 2021

I bought a 350 recently. The unit is good. Unfortunately, JPI customer service is a mess. They forgot to include the panel mounting bracket. Then the mailed it to the wrong address. Holding up the whole project.....Oh JPI....work it out already.

Stephen K
April 20, 2020

The “Full package” doesn’t come with all the sensors needed to run the motor, by the time you add everything it’s cheaper and better to upgrade to the 740. The rep I spoke with told me it came with everything, so I had trouble returning it because these are special order. JPI was shut down and had no one to help so my plane is grounded till they come back to work.

Ted M
April 11, 2020

Q&A

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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Are any probes included with the JPI EDM-350 Engine Monitoring System?

Yes, the following probes and functions are included:

  • EGT - Exhaust Gas Temperature
  • CHT - Cylinder Head Temperature
  • Included - Probes and Harness
  • VDC - Voltage
  • CLD - Shock Cooling on "All" Cylinders
  • ROP/LOP - Lean Find
  • DIFF - Engine Health
  • USB - Data Port built in
  • Data Record - 600 Hrs. at every 6 sec
  • EZTrends - Graphing software, including Google Earth Location
Additional functionality is available. Probes and harnesses for these additional functions are sold separately. PDF worksheet located in the Overview must be completed and submitted with order.

Q: Interested in the JPI EDM-350. What is the cost for CHT probes, EGT probes and FF?

CHT and EGT probes are included. Fuel Flow must be ordered separately.

Q: This EDM 350 looks like an interesting system but there is no mention of required senders/probes and their cost. If it only takes the JPI senders used for certified installations then that would double the cost for the complete installation? If it accepts automotive senders than the cost would be much more attractive.

Different probes may work for this system but cannot be guaranteed. All testing was done with JPI probes and harnesses. Please see website for included functions as well as available optional functions.

Q: I was planning on using the Dynon unit, and have already installed their sensor kit. Will this JPI EDM 350 unit work with those sensors?

Different probes may work for this system but cannot be guaranteed. All testing was done with JPI probes and harnesses. We recommend using only JPI probes with the EDM 350. Please see website for included functions as well as available optional functions.

Q: Are probes for oil temp and oil pressure included with the JPI EDM 350?

No, these are available as additional options. EGT and CHT are the only probes that come standard.

Q: To order the fuel flow for the JPI EDM 350, it's confusing, do I have to order a separate transducer, and why do you ask if its for 201 or 231, there is no information anywhere about the fuel flow management to upgrade the 350, not even on JPI web site?

If this is a new install then yes you, will need to order the transducer. If you had a FS 450 and wanted to replace the unit with a EDM 350 you could use the older JPI transducer.

Q: Can the CHT probes be of the gasket type? Id like to install on a C90-16F engine (same basic engine as a C85 & O-200) How do you specify Gasket CHT probes?

You will need to specify this in the special instructions box when you add this to your cart. You can also specify this in the necessary order form that you send in at time of order.

Q: I have oil temp/pressure, MAP and Amp probes connected to analog gauges. Can these be used with the 350?

No, you can only use JPI probes with the EDM 350.

Q: I know this question has been asked more than once, but just to be clear, the basic unit comes with the appropriate number of EGT and CHT probes, correct? 4 cyl unit has 4 of each and 6 cyl unit has 6 of each?

Yes, that is correct.

Q: What is the difference between the JPI EDM 350 basic package and the the full package?

The difference between the basic and the full packages are the functions that are included.
Basic includes: RPM+EGT/CHT Bar Graph, Fuel Flow, Volts, OAT, Flight & Tach timer and Local & Zulu time.
Premium includes: RPM + 5 add'l Primary Functions, AND up to 5 non-primary functions, that can be displayed on a secondary page.

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