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  #1  
Old 06-17-2017, 06:48 AM
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Default Garmin GEA 24 location in RV-8 ?

I am interested in where builders / shops install the Garmin GEA24 engine instrument module in an RV-8 ?

I'd also like to know if the EGT/CHT wires in the sensor kit can reach this location without needed extensions.
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  #2  
Old 06-17-2017, 07:47 AM
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Glen,
There are no wires in the sensor kit for the EGT/ CHT probes.
You will need to get some 22 gauge type K thermocouple wire for that.
In the past, I've found the 6 foot harness that is usually standard to be a little short. I now order 64 ft of thermocouple wire and make the harness 8 ft long.
I never wind up short that way, and can mount the module anywhere convenient.
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  #3  
Old 06-17-2017, 02:47 PM
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Thanks Jon, I didn't realize the EGT & CHT probes would come without wire. My prior setup came with the wires attached to those probes and they were a little short (as you noted).

I'm still looking for recommendations on where others installed their GEA 24.
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  #4  
Old 06-17-2017, 04:25 PM
Andrew Anunson Andrew Anunson is offline
 
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It seems to me that the goal should be to keep the GEA 24 close to the engine instead of close to the instrument panel. There are many wires to the engine and two wires to the rest of the G3X system (is that a correct statement?).)

For instance, on a pusher aircraft with the engine in the back, I'd mount the GEA 24 on the cool side of the firewall (perhaps 6 to 8 ft from the IP). On a twin, I'd mount each GEA 24 out on the wings near the engines.

Am I looking at this correctly?
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  #5  
Old 06-17-2017, 05:12 PM
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In an RV-8, the cool side of the firewall is either the pilot footwell or the baggage compartment. I feel both are a compromise and hope some RV-8 builders/installers can comment on their choices.
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  #6  
Old 06-17-2017, 08:03 PM
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I am also looking for a suitable location. I am thinking I might put it on the underside of the floor of the forward baggage compartment. That keeps it out of the way of rudder pedals, but close to the firewall.
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  #7  
Old 06-17-2017, 08:44 PM
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Quote:
Originally Posted by Andrew Anunson View Post
It seems to me that the goal should be to keep the GEA 24 close to the engine instead of close to the instrument panel. There are many wires to the engine and two wires to the rest of the G3X system (is that a correct statement?).)

For instance, on a pusher aircraft with the engine in the back, I'd mount the GEA 24 on the cool side of the firewall (perhaps 6 to 8 ft from the IP). On a twin, I'd mount each GEA 24 out on the wings near the engines.

Am I looking at this correctly?
Nope!

The module gets a quite a few other inputs besides engine. Mount it on the aft side of the fwd baggage wall or on a shelf between the gear tower cross braces.
There is no need to keep it close to the engine other than the cost of shielded and thermocouple wire.
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  #8  
Old 06-18-2017, 03:44 AM
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Quote:
Originally Posted by jthocker View Post
Mount it on the aft side of the fwd baggage wall or on a shelf between the gear tower cross braces.
OK, I'll plan to install it on a shelf behind the instrument panel and plan for an appropriate route for the wire bundle that will come from the engine compartment.
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  #9  
Old 06-18-2017, 06:08 AM
Robert Anglin Robert Anglin is offline
 
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Default Yep.

We looked at this for a little while and put the EIS at the back of the instrument bay on the right side as we ran our wiring out to the engine just under the lip of the baggage door through the fire wall there. This seemed to be a good place so that all the wiring would reach as needed. Just where we put ours. Yours, R.E.A. III #80888
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  #10  
Old 06-18-2017, 07:03 AM
maus92 maus92 is offline
 
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Mine is mounted on the left side of the fwd baggage compartment aft bulkhead, inside the volume between the panel and the bulkhead. The GEA24 has four DB connectors, hence a LOT of interfacing, so I found it convenient to keep it close to most of my other avionics. I have two firewall penetrations for cable bundles, the left side for "data" connections, and the right side for "power" wiring.
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