Today's Message Index:
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1. 05:52 AM - Re: engine monitor problem - CHT thermocouples (T. Graziano)
2. 07:57 PM - Re: Re: engine monitor problem - CHT thermocouples (JAPhillipsGA@aol.com)
3. 07:59 PM - Re: Re: engine monitor problem (JAPhillipsGA@aol.com)
Message 1
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| Subject: | Re: engine monitor problem - CHT thermocouples |
--> JabiruEngine-List message posted by: "T. Graziano" <tonyplane@bellsouth.net>
Thanks Bill,
I suppose that you could also put the oil temp probe into boiling water
(with it grounded to the engine) and check your temp gauge for a 212F/100C
reading. I find mine reads the same temp as the CHTs (within a couple of
degrees spread among all readings) when the engine is cold, so I am assuming
that the hot readings are OK. My oil press probably reads a few pounds high
as I show 4psi before start, but that does not concern me. I tried another
VDO oil press switch and get about the same readings between the two. I
also attached a red LED to the WK switch (the idiot light switch) on the
VDO, through a relay, which lights up before engine start (zero oil press)
and at very low oil press. It is reassuring to see the LED go out at engine
start up.
I have to watch CHT and oil press when the ambient temp is warm to hot. If
I keep full throttle in climb.below 90 kts I will start approaching red
lines in CHT and oil temp. If oil temp goes near red line, then my oil
press starts to drop. I am using EXon Elite 20W50 oil. My instrumentation
is the Grand Rapids EIS - (It is a really neat instrument - if you go to
max or min for any set parameter, a large red light blinks at you.)
Tony Graziano
Zodiac 601XL, 493TG
Time: 07:56:51 AM PST US
From: JAPhillipsGA@aol.com
Subject: Re: JabiruEngine-List: Re: engine monitor problem - CHT
thermocouples
--> JabiruEngine-List message posted by: JAPhillipsGA@aol.com
Tony, thanks for the input. I to had two cylinders probes reversed. My real
concern is how much attention I need to pay to the gages. I noticed the
other
day that my oil temp went up as the CHTs for 4 & 6 stayed up and moved down
as
they went down. I wonder how accurate my oil temp gage is ? Is there a way
to
mechanically test this ? When I first started flying her I used a mechanical
gage to test the oil pressure gage and found it reading 10-15 pounds high.
Have
you tested yours ? I will be glad to send you the oil gage I used and
fittings if you want. Thanks again, Bill of Georgia
do not archive
Message 2
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| Subject: | Re: engine monitor problem - CHT thermocouples |
--> JabiruEngine-List message posted by: JAPhillipsGA@aol.com
Tony, I conducted my CHT tests this afternoon and the results were dead spot
on. Course I did not get the oil bath temperature up above 175 as hot oil can
be a problem, but the probes were very accurate up to that point. I' going to
fly into a little fly-in at Larenceville just east of Atlanta Sat morning.
Nice field and folks at the EAA chapter put on a fine breakfast. Several other
601's are bound to be around. Maybe you could make it. Best regards, Bill
Message 3
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| Subject: | Re: engine monitor problem |
--> JabiruEngine-List message posted by: JAPhillipsGA@aol.com
Jim, I conducted my CHT probe tests this afternoon as you described with the
hot oil and they were very accurate. Good for peace of mind. Thanks for the
assistance. Best regards, Bill
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