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Date: Mon, 11 May 2009 08:50:40 -0600
Message-ID: <3036fbc30905110750r4d6930d6u5c057efb1b7d4c02@mail.gmail.com>
Subject: RE: Initial Tuning - Today
From: Mike Fontenot <mikef@apexconsultingservices.com>
To: flyrotary@lancaironline.net
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Tracy (and other),

First, continued thanks for the feedback. Like Jim said, "You are making
progress".  That is very true, I am so far ahead of where I was in August
2007, when trying to run this engine and the original combination of
igniters/coils burned out at 3300 RPM. I have a much better electrical
system (that I know the details of), control of all the critical circuits,
and the engine RUNS! Good things will come.

Tracy, good advice to get on the same page with terminology. I will start
with the MIXTURE INDICATOR, rather than a shotgun approach.


1. EM2 Mixture Indicator (MI) - lets sort this one out, I'll try to explain
how I understand the MI, and hopefully we can come to a common ground. My
notes on tuning keep coming back to the general goal of: "Mixture Knob at
1200 with Mixture Indicator reading 1 BAR for the engine throttle settings,
except for Idle where you want 60% or 1+ bars".

My understanding is that the MI on the EM2 Standard Display Page 1 is:

A. MI is right above the voltage reading (Yes I have EGT connected, now I
know what those other 4 bars are to the right).
B. MI is 2 BARS HIGH TOTAL. So when I say "50%"  I mean "1 BAR". If you
define the EM2 display as having 4 LINES, and count
   from the top to bottom, Line 1, 2, 3, 4.  The MI is at lines 2 and 3.
C. My understanding is that 'stoichoimetric' is at 1 BAR
D. My understanding is that if the MI is below 1 BAR then that indicates
LEAN, and visa versa, above 1 BAR indicates RICH.
E. My understanding for tuning goals, is that when the MIXTURE KNOB is at
1200
   1. Low MAP/RPM  - my goal is to have the MI reading at 1+ BAR, or around
60% because a little RICH is better at LOW RPM.
   2. Medium to high MAP/RPM - goal is to have the MI at 1 BAR (or 50%)
   3. High MAP/RPM - goal is to have MI around 1 BAR (or 50%). I want to
avoid running too lean (below 1 BAR / 50%) to
      prevent burning vavles, etc.
F. My understanding is that using the EM2 Table View or Track View, the MI
is at the far right and it is a total of 2 BARS
   HIGH (again Lines 2 & 3). So the corresponding statements about 1 BAR/50%
hold here as well.

Tracy you wrote: >>2 bars is less than 20% of full scale.  How can it DROP
to 30% from 2 bars?   What is your definition of 2 bars?   We have an
obvious problem with terminology here.<<

This has me completely confused, obviously.

2. I will work on the electrical/alternator system as a priority. I think I
know where the problem is, should not be hard to fix (I hope).

3. Jim: You said I should be able to idle down to 850 RPM. At my lowest
throttle setting, when I start the engine the lowest RPM I've ever seen on
the EM2 is around 1500 RPM. I can't drop it any lower than that, the
throttle level just does
not go any further down. And I am letting it warm up before starting the
tuning. I gotta tell you it is a joy to just sit there and listen to it run
smoothly.

I'll stop here. Thanks,

Mike

PS. is there a way to simply 'REPLY TO' a posting in the flyrotary list,
from that listing page (
http://mail.lancaironline.net:81/lists/flyrotary/List.html )?


================================
Mike Fontenot
Apex Consulting & Services LLC
Lakewood, Colorado
303 / 731-6645
mikef AT apexconsultingservices DOT com
================================

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Tracy (and other),<br><br>First, continued thanks for the feedback. Like Ji=
m said, &quot;You are making progress&quot;.=A0 That is very true, I am so =
far ahead of where I was in August 2007, when trying to run this engine and=
 the original combination of igniters/coils burned out at 3300 RPM. I have =
a much better electrical system (that I know the details of), control of al=
l the critical circuits, and the engine RUNS! Good things will come.<br>
<br>Tracy, good advice to get on the same page with terminology. I will sta=
rt with the MIXTURE INDICATOR, rather than a shotgun approach.<br><br><br><=
br>1. EM2 Mixture Indicator (MI) - lets sort this one out, I&#39;ll try to =
explain how I understand the MI, and hopefully we can come to a common grou=
nd. My notes on tuning keep coming back to the general goal of: &quot;Mixtu=
re Knob at 1200 with Mixture Indicator reading 1 BAR for the engine throttl=
e settings, except for Idle where you want 60% or 1+ bars&quot;. <br>
<br>My understanding is that the MI on the EM2 Standard Display Page 1 is:<=
br><br>A. MI is right above the voltage reading (Yes I have EGT connected, =
now I know what those other 4 bars are to the right).<br>B. MI is 2 BARS HI=
GH TOTAL. So when I say &quot;50%&quot;=A0 I mean &quot;1 BAR&quot;. If you=
 define the EM2 display as having 4 LINES, and count<br>
=A0=A0 from the top to bottom, Line 1, 2, 3, 4.=A0 The MI is at lines 2 and=
 3.<br>C. My understanding is that &#39;stoichoimetric&#39; is at 1 BAR<br>=
D. My understanding is that if the MI is below 1 BAR then that indicates LE=
AN, and visa versa, above 1 BAR indicates RICH.<br>
E. My understanding for tuning goals, is that when the MIXTURE KNOB is at 1=
200 <br>=A0=A0 1. Low MAP/RPM=A0 - my goal is to have the MI reading at 1+ =
BAR, or around 60% because a little RICH is better at LOW RPM.<br>=A0=A0 2.=
 Medium to high MAP/RPM - goal is to have the MI at 1 BAR (or 50%)<br>
=A0=A0 3. High MAP/RPM - goal is to have MI around 1 BAR (or 50%). I want t=
o avoid running too lean (below 1 BAR / 50%) to <br>=A0=A0=A0=A0=A0 prevent=
 burning vavles, etc.<br>F. My understanding is that using the EM2 Table Vi=
ew or Track View, the MI is at the far right and it is a total of 2 BARS<br=
>
=A0=A0 HIGH (again Lines 2 &amp; 3). So the corresponding statements about =
1 BAR/50% hold here as well. <br><br>Tracy you wrote: &gt;&gt;2 bars is les=
s than 20% of full scale.=A0 How can it DROP to 30% from 2 bars?=A0=A0 What=
 is your definition of 2 bars?=A0=A0 We have an obvious problem with termin=
ology here.&lt;&lt;<br>
<br>This has me completely confused, obviously. <br><br>2. I will work on t=
he electrical/alternator system as a priority. I
think I know where the problem is, should not be hard to fix (I hope).<br><=
br>3. Jim: You said I should be able to idle down to 850 RPM. At my lowest =
throttle setting, when I start the engine the lowest RPM I&#39;ve ever seen=
 on the EM2 is around 1500 RPM. I can&#39;t drop it any lower than that, th=
e throttle level just does<br>
not go any further down. And I am letting it warm up before starting the tu=
ning. I gotta tell you it is a joy to just sit there and listen to it run s=
moothly.<br><br>I&#39;ll stop here. Thanks,<br><br>Mike<br clear=3D"all">
<br>PS. is there a way to simply &#39;REPLY TO&#39; a posting in the flyrot=
ary list, from that listing page ( <a href=3D"http://mail.lancaironline.net=
:81/lists/flyrotary/List.html">http://mail.lancaironline.net:81/lists/flyro=
tary/List.html</a> )? <br>
<br><br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>Mike Fontenot<br>Apex Consulting &amp; Se=
rvices LLC<br>Lakewood, Colorado<br>303 / 731-6645<br>mikef AT apexconsulti=
ngservices DOT com<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>

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