Today's Message Index:
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1. 06:46 AM - Re: Engine analyzers (Kent Ashton)
2. 03:36 PM - Re: Engine analyzers (Trampas)
Message 1
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| Subject: | Re: Engine analyzers |
--> Engines-List message posted by: Kent Ashton <kjashton@vnet.net>
> From: TeamGrumman@aol.com
> On my plane (Tiger, O360-A4K, new Lycoming cylinders, ported and polished),
> I've noticed that #3 CHT goes up faster than the others during climb, to the
> point that reducing power and staying full rich is required to keep temps
> below
> 450.
I'm experienceing the same thing on new millenium cylinders (but in a
pusher (Cozy)). #4 CHT spikes right after takeoff. Part of the problem in
my installtion is to tinker with the airflow to #4 but I think some of it
will resolve with more break-in time. I have 10 hours on it now.
>
> Question: Has anyone else had experience with JPIs displaying higher temps
> than expected?
>
I have the JPI on another airplane and it seems to be accurate. Very likely
it's just the new cylinders running hotter. Could also be the way your
thermocouples are wired to the gauge. Using regular wire vs. thermocouple
wire will alter the voltage into the guage.
--Kent
Message 2
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| Subject: | Engine analyzers |
--> Engines-List message posted by: "Trampas" <tstern@nc.rr.com>
Check out this link...
If you need some help in calibrating your instrument let me know..
http://www.sterntech.com/app_notes.php
Trampas Stern
www.sterntech.com
-----Original Message-----
From: owner-engines-list-server@matronics.com
[mailto:owner-engines-list-server@matronics.com] On Behalf Of Kent Ashton
Subject: Re: Engines-List: Engine analyzers
--> Engines-List message posted by: Kent Ashton <kjashton@vnet.net>
> From: TeamGrumman@aol.com
> On my plane (Tiger, O360-A4K, new Lycoming cylinders, ported and
polished),
> I've noticed that #3 CHT goes up faster than the others during climb, to
the
> point that reducing power and staying full rich is required to keep temps
> below
> 450.
I'm experienceing the same thing on new millenium cylinders (but in a
pusher (Cozy)). #4 CHT spikes right after takeoff. Part of the problem in
my installtion is to tinker with the airflow to #4 but I think some of it
will resolve with more break-in time. I have 10 hours on it now.
>
> Question: Has anyone else had experience with JPIs displaying higher
temps
> than expected?
>
I have the JPI on another airplane and it seems to be accurate. Very likely
it's just the new cylinders running hotter. Could also be the way your
thermocouples are wired to the gauge. Using regular wire vs. thermocouple
wire will alter the voltage into the guage.
--Kent
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