Help me fill out this EDM-900 configuration page

[FloridaMan]

I'm ordering an EDM-900 and having it shipped to my IA for when I'm back in town. My reason for going with the JPI is I want to remove the factory M20F six pack, which includes the fuel level gauges and there is a $400 instant rebate this month on the EDM-900. JPI is closed today, I couldn't get a clear answer from Spruce and I don't want to keep bugging the IA for every little question; I'd rather give him the completed list and have him say "ok." 

 

There's a questionnaire that I'm not quite sure on. I'm ordering the kit for the 4-cyl w/ L/R fuel levels. I want to get rid of ALL of the factory instruments in my panel at once. I'll have it mounted in a standard hole and rearrange the right half of my panel at a later date. 

 

Here is the questionnaire. Those that I'm not sure on are in red with comments:

 

1. Aircraft Make/ Model: __Mooney M20F_ Year___67___ Aircraft N-Number________ Aircraft S/N________

2. Engine Manufacturer: Check one: Lycoming__X__ Continental____ Other________________________

3. Engine Type: (TIO-360, O-360 etc):IO360-A1A____

4. Engine: Stock: Yes_X_ No____ ….if “No” provide a Complete Copy of the STC and AFMS.

5. Are there Engine/Airframe related STC’s like Intercoolers, Turbochargers etc.? Yes___ No_X__

If “Yes” please provide a complete copy of the STC and AFM Supplemental markings pages.

 

• comment: I have the LoPresti cowling with the bigger oil cooler, SlikStart system, powerflow exhaust and GAMIjectors, but I don't think these are the types of modifications that are relevant for the engine monitor. 

 

6. Engine Temperature (Preference) in ºF__X__ (Standard) or ºC____

7. Magneto Part No. (i.e. P/N S21 or 6000 etc.) Bendix P/N_________ Slick P/N __????________ (I don't know the Slick P/N and can't find it in the logs)

8. Pressurized Magnetos? Yes_____ No__X___ Other Tach Generator Type (i.e. UMA, Light Speed)_______

9. Number of Fuel Level Gauges: Check: 1___ 2_X__ 3___ 4___ Switch operated gauges? Yes ___No___

 

• Switch operated? The indications change (go up) with the master switch on. I have a feeling they're inductive and that their 50 year old age is making them not go to zero like they're supposed to. 

 

10. Number of Fuel Level Sending Units: 1___2_X__3___4___5___6____ (Senders in series count as 1).

11. Number of Fuel Tanks: Check: 1____ 2__X__3____ 4____5____6____ (930/960 Displays 4 Tanks max.)

12. Fuel Level Sender Type: Resistive__X__ Penney Cap____ Gull____ If other____(Please contact JPI)

 Note: Senders for Fuel Level not included in price, use existing aircraft senders.

 

• I'm ordering the unit for L/R fuel tanks. This question confuses me a little. Since I'm paying extra for fuel level, does that mean it includes the sender in that case? 

 

13. Usable Fuel: (Main: Left__32___ Right___32__ ) (Aux: Left_____ Right_____ ) Center Main_____

Forward_____ Aft_____

14. Fuel Flow and Fuel Quantity are displayed in (Circle Preference): Gallons, Liters, Lbs., and

Kilograms.

15. Tanis Heating System? Yes__X__ No____ Note: JPI Bayonet Probes must be used for CHT.

 

• I have the heaters on three cylinders; the fourth has the stock CHT probe. I assume this is the standard configuration and I'll get 3 Tanis CHT probes and a regular one? 

 

16. System Voltage 14__X__ 28 ____

17. You don’t have fuel pressure installed in the instrument panel, but want it as an option at extra cost?

Yes____ No___X__ What limits? Low __14__ High__30__ (Not available for Gravity Systems).

 

• This one really confuses me. I have the fuel pressure gauge integrated into the same instrument as the MP gauge. I have fuel pressure installed in the instrument panel, but I want it to be handled by this instead so I can get rid of that braided fuel line that runs into my panel. In my case, i want to replace it. 

 

18. Carburetor with Engine Driven Pump? Yes____ No__X__ Gravity Feed? Yes____ No __X__

19. Fuel Injected Engine? Yes__X__ No ____

20. Pressure Carburetor with return? Yes____ No_X___

21. Engine(s) (Tachometer) Time since new/overhauled: Hours: Left/Front __XXXX_____Right/Rear_______

22. Airframe (Hobbs) Time: Total Hours___XXXX_____ Note: Times must be inputted at the factory before

shipping. Times cannot be edited in the field!

25. If ordering EDM-960, where will you install the DAU’s? Engine firewall_____ is standard with 10ft. leads.

DAU installation in the cockpit_____ requires 20ft. leads at an additional price of $450.

[N601RX]

5. bladders?

7. If slicks 4300 series

9. No selector switch, 2 tanks, no senders included reuse old ones. There is a cal routine to go through.

12. Resistive

15. I would want 4 of the same kind.

17. I asked for clarification on this also and was given incorrect info by vendor, but they made it right. Fuel pressure is required because it listed as an operation limitation. Last spring they tried to make me pay extra for the FP sensor, but because I had an email from them stating it was included they finally gave to me after I told them to just cancel the order. This happened to a few others on here also so hopefully they are just including it now.

22. With the new firmware and instructions these are now field changeable.

[Bob_Belville]

17 you will need a jpi transducer. The question is ambiguous. I suppose they are not referring to the fact that you do have a fp indicator but that you will not be able to use it and you'll need a transducer.

 

The pic is my E which should be pretty similar. The 3 transducers were new with the jpi 930 - MAP, FuelP, OilP.  

[FloridaMan]

5. No bladders.

15.. I think it's standard to have one cylinder (#3?) to not have a heater element. I will make sure I get advised on this.

22. That's good. I fly a lot and can't predict within 40 hours two weeks ahead of maintenance.

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[Marauder]

17 you will need a jpi transducer. The question is ambiguous. I suppose they are not referring to the fact that you do have a fp indicator but that you will not be able to use it and you'll need a transducer.

 

The pic is my E which should be pretty similar. The 3 transducers were new with the jpi 930 - MAP, FuelP, OilP.  

 

Bob -- When my 830 was installed I had the FT-60 from the EI share the fuel pressure with the JPI. Not sure if the 900 series requires the JPI version. 

 

Antares -- I would be interested hearing what you do about the fuel pressure. Our factory originals did not use a sensor, just fuel ported directly to the pressure gauge in the cockpit. If you want to replace the factory fuel/MP gauge, I think you will need the pressure sensor. Whether they give it to you for free is the question.

[Bob_Belville]

Bob -- When my 830 was installed I had the FT-60 from the EI share the fuel pressure with the JPI. Not sure if the 900 series requires the JPI version. 

 

Antares -- I would be interested hearing what you do about the fuel pressure. Our factory originals did not use a sensor, just fuel ported directly to the pressure gauge in the cockpit. If you want to replace the factory fuel/MP gauge, I think you will need the pressure sensor. Whether they give it to you for free is the question.

I understould from Antares comment on Q#17 that he has the oem combo MAP/FP gauge I had and that the fuel line was plumbed all the way to the gauge.

 

Pic is what I had before new panel.

[N601RX]

You will like it. Make sure they hook it up to your gps when it is installed. Then the saved data files will include position, speed and altitude for each data point. This makes it easier to compare data between flight. It will also output into KML files for google earth.

You may want to check prices at gulf coast and sarasota. Last year they were cheaper than spruce. The manager at Sarasota also stood behind him telling me that the fuel pressure was included and either convinced JPI to include it or included it himself.

[Bob_Belville]

I suppose your A/P will have the plane down long enough that you should use the opportunity to get the fuel sender units rebuilt by Air Parts, Lock Haven PA. 

[Marauder]

I suppose your A/P will have the plane down long enough that you should use the opportunity to get the fuel sender units rebuilt by Air Parts, Lock Haven PA. 

 

Bob -- I understand they re-use the senders. Mine are pretty solid. Do they need to be rebuilt or just if they are problematic? I was told that the JPI 900/930 does nothing to improve the lousy senders to begin with. In other words, if your fuel gauges were inaccurate, they will be inaccurate on the JPI.

[N601RX]

As long as the senders are still providing a resistance reading and don't have any "Dead" spots the calibration process will compensate for most of the inaccuracies. It is a 5 point calibration and you get to pick the 5 points. For example you put 5 gallons in and them tell it there is 5 gallons in the tank. Then repeat for the other 4 points. It will create a lookup table and interpolate between the points.

[carusoam]

I like Bob's bank o' sensors...

Anything that keeps oil and fuel from going directly into the cockpit is worth the money....

Remember before and after photos are a must....!

Best regards,

-a-

[FloridaMan]

I suppose your A/P will have the plane down long enough that you should use the opportunity to get the fuel sender units rebuilt by Air Parts, Lock Haven PA.

I sure hope not. I'm flying 40+ hours/month as it is. The left gauge sometimes works. If I had to bet, I'd put my money on it being the 48 year old gauges.

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[Bob_Belville]

Chris, my level sensors looked pretty rough, at least the floats before being rebuilt. I think the readings are more accurate after being rebuilt which I assume involved making sure the "rheostat" was linear. In the 2 years I've had the 930 I have probably only taken the quantity below 10 gal on one tank or the other about 10 times. The reading gets very accurate when it is below 10 gal. Of course the fuel flow is extremely accurate so tank levels are just backup info.   

 

As to the requirement for accuracy, as I understand it the gauge must read empty when the tank is empty. Anything else is gravy. 

[FloridaMan]

I spoke with JPI. They said that if fuel pressure is in the limitations in the POH, they will include the sensor. The only remaining issue is the Tanis heater. They said that I need to contact Tanis about how to make the heater work with JPI's probes. 

 

Also, as far as the tach is concerned, they have to set it for the EDM-900; the configuration tool works with the 930, but not the 900. 

[N601RX]

The tach and hobbs time is settable on the 900 by just using the buttons with the built in config editor.  The procedure is not published in the manual, so they may not want it made public.  I'll send you a pm with it attached. 

 

Glad to see they are including the fuel pressure sensor now. What you stated above is what all the dealers were telling customers last year, but then JPI was saying it was extra once they were ready to ship the unit.

[triple8s]

If you hve a Tanis with bayonet heating elements you have to use the sparkplug washer thermocouple....... isnt this correct? Thats the way mine is set up, not that I like it but I was under the impression that all the CHT probes had to be the same.

[FloridaMan]

I spoke with Tanis; they have a replacement probe that connects either to the valve cover or the intake manifold. The probes are $140/pc. I live in South Florida and have never had a reason to use the heater. I'm considering possibly just removing the cylinder heaters. 

[N601RX]

Living in the south I would prefer cylinder temp sensors mounted in the factory location over heaters mounted in the same holes also.

[Marauder]

I'm resurrecting this thread to ask a question of those who have installed the JPI 900 and have fuel bladders in their Mooneys. What did you end up with as your final useable fuel quantity?