Hi George,
Here is what the EFISM looks like in its
case. This is the main flight screen with Air/Fuel Ratio indicator
(top), Fuel Flow and Fuel used. There are a number of other screens some
of which shows the RWS EC2 fuel maps and ignition timing. Check out www.andersonee.com if interested in more
information.
But, to answer your question, the EFISM gets
all its fuel flow and usage information from reading the injector's pulse
train (no sensor required). The Air/Fuel Ratio indicator uses the O2
sensor (narrow band) and if you want to see the Ec2 fuel maps and manipulate
them using the EFISM then it requires 2 wires to the data output of the
EC2.
So the O2 sensor is really the only sensor
needed. Tracy Crook offers the EM2 which is an aircraft performance and
engine performance unit offering much more capability than my unit. My
unit would primarily be of interest to folks who say - already had an engine
monitoring unit (Such as a Grand Rapids of others) but wanted to also add this
Fuel monitoring/management system and did not need/want to duplicate the
functions provided by the EM2.
It occupies the standard 2 1/4" dia instrument
hold - is 1 1/2" deep and weighs 2 1/4 ozs.
Ed
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