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Posted

I am trying to decide on EIS integrated with G3X Touch or a separate GI-275 unit. The GI-275 photos on Garmin's site has a good representation of what the display would look like for a 6 cylinder turbo engine. Specifically, RPM, MAN, and TIT being available with bars for the CHT & EGT for the cylinders.  See [1]. Unfortunately, the G3X Touch product page [2] isn't as complete. 

Wondering if someone with a G3X touch EIS on a 6 cylinder turbo engine can post photos/videos of what the "engine strip" contains as well as the contents of the dedicated engine pages.

Thanks!

[1] https://www.garmin.com/en-US/p/897577
[2] https://www.garmin.com/en-US/p/682215/pn/G3X-TCERT-14

Posted

This is the full display on my G3x which is a Turbocharged 6 cylinder Continental TSIO360-LB. I typically use the full display when in take off or landing mode or when leaning my mixture. I use the strip on the left when in cruise.

 

20230608_101636.jpg.044bb513cb863eec7983082d81abb976.jpg

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Posted

I have not found a % power.  Might be in the experimental, so coming later.

But I fly LOP, so it is pretty easy.  Fuel Flow x 13.7 (turbo engine) = HP

 

Posted

% Power is set up in configuration mode. It uses rpm, MAP, fuel flow. You input whether the engine is Lycoming or Continental and whether it’s NA or turbocharged and the rated power at max rpm and the MAP for rated power if turbo. It’s pretty accurate LOP but reads higher than actual (maybe about 5% high - I haven’t really paid a lot of attention to it) ROP.

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Posted
2 hours ago, shawnd said:

Thanks - do you know if % power is calculated by the unit? And where is that potentially shown?

It's being shown in that screenshot already, just between the MAP and RPM displays.

Posted
Just now, Ryan ORL said:

It's being shown in that screenshot already, just between the MAP and RPM displays.

Hah - that it is - missed it completely. Thanks

Posted
2 hours ago, shawnd said:

Thanks for the explanation. How are you comparing accuracy of the HP, via POH numbers?

Yes, just comparing to power chart in POH and I also noted that the airspeed is slower than I would expect for the indicated % power. There was a thread about this on BT IIRC. 

Garmin doesn’t publish the algorithm. I know George Braly has stated repeatedly that all the engine monitors are inaccurate in calculating power except the Cirrus Perspective for which he supplied a proprietary algorithm. 

Posted

+1

I’m not flying a turbo, but on my four-banger flying ROP the percentage power is always higher on the G3X than the flight manual. I use the charts from the flight manual, and assume that the G3X is always going to be off. 

Posted

Interesting, we should be able to work with Garmin to fine tune this, esp if they could figure out GFC porpoising for our beloved Mooneys!

I can give it a shot once my airplane is up in the air again. 

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