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Date: Mon, 16 Jan 2012 17:52:57 -0600
Message-ID: <CAHh3jbNpkQvbfWaXNGxYnq2Ti_jou_rK=06vj1-9gWac1c2PdA@mail.gmail.com>
Subject: Re: [FlyRotary] Re: tuning advice
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=f46d04138a67f44d9f04b6ade9a6

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Lynn,

I know this is an old posting, but I save all of your posts for future
reference.  I was wondering if you could you comment on the amount of
advance appropriate for a p-port engine?  What is the max advance I should
run with 100LL?  Do the numbers you quoted below apply the same to p-ports
as to side port engines?

As it relates to a p-port engine, what MAP readings should I get at idle
(1800-2000 rpm)?

Thanks,
Mark

On Mon, May 16, 2011 at 12:10 AM, <Lehanover@aol.com> wrote:

> **
> Never at any throttle setting above idle. For closed throttle or coast
> conditions up to 44 degrees is fine because there is little fuel or air
> being processed and high vacuum, so burn rates are very slow. Helps prevent
> popping and banging on long coast, and in the car helps keep the cat temps
> up, and best of all reduces HC so you can buy one in California. For
> anything involving power then 27 degrees for higher octanes and 22 to 24
> for low octanes.
>
> Lynn E. Hanover
>
>
>  In a message dated 5/15/2011 6:56:10 P.M. Paraguay Standard Time,
> echristley@nc.rr.com writes:
>
> Lynn, is there ever a need for the spark advance to go past 30?  This is a
> graph of a couple of the short runs I was making today.  The advance goes
> up to 33.2, but it went as high as the mid 40's.  It is so erratic, because
> it is hitting up against the rev limiter which I had set to 3600RPM. It
> uses a fuel cut algorithm, which is why it is so choppy.
>
> I need to get it running with less throttle, so I don't have to have it
> open 35%, then I can get a cleaner graph...but I'm just wondering if I need
> to beat back that advance first.
>
>
>

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Lynn,=A0<div><br></div><div>I know this is an old posting, but I save all o=
f your posts for future reference. =A0I was wondering if you could you comm=
ent on the amount of advance appropriate for a p-port engine? =A0What is th=
e max advance I should run with 100LL? =A0Do the numbers you quoted below a=
pply the same to p-ports as to side port engines?=A0</div>
<div><br></div><div>As it relates to a p-port engine, what MAP readings sho=
uld I get at idle (1800-2000 rpm)?=A0</div><div><br></div><div>Thanks,</div=
><div>Mark<br><br><div class=3D"gmail_quote">On Mon, May 16, 2011 at 12:10 =
AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:Lehanover@aol.com">Lehanover@a=
ol.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><u></u>



<div style=3D"font-size:12pt;font-family:Arial"><font color=3D"#000000" siz=
e=3D"3" face=3D"Arial">
<div>Never at any throttle setting above idle. For closed throttle or coast=
=20
conditions up to 44 degrees is fine because there is little fuel or air bei=
ng=20
processed and high vacuum, so burn rates are very slow. Helps prevent poppi=
ng=20
and banging on long coast, and in the car helps keep the cat temps up, and =
best=20
of all reduces HC so you can buy one in California. For anything involving =
power=20
then 27 degrees for higher octanes and 22 to 24 for low octanes.</div>
<div>=A0</div>
<div>Lynn E. Hanover</div>
<div>=A0</div>
<div>=A0</div>
<div>
<div>In a message dated 5/15/2011 6:56:10 P.M. Paraguay Standard Time,=20
<a href=3D"mailto:echristley@nc.rr.com" target=3D"_blank">echristley@nc.rr.=
com</a> writes:</div>
<blockquote style=3D"BORDER-LEFT:blue 2px solid;PADDING-LEFT:5px;MARGIN-LEF=
T:5px"><font style=3D"BACKGROUND-COLOR:transparent" color=3D"#000000" size=
=3D"5" face=3D"Arial"><font size=3D"+2">Lynn, is there ever a need for the =
spark advance to go past 30?=A0=20
  This is a graph of a couple of the short runs I was making today.=A0 The=
=20
  advance goes up to 33.2, but it went as high as the mid 40&#39;s.=A0 It i=
s so=20
  erratic, because it is hitting up against the rev limiter which I had set=
 to=20
  3600RPM. It uses a fuel cut algorithm, which is why it is so choppy.<br><=
br>I=20
  need to get it running with less throttle, so I don&#39;t have to have it=
 open=20
  35%, then I can get a cleaner graph...but I&#39;m just wondering if I nee=
d to beat=20
  back that advance=20
first.<br></font><br><br></font></blockquote></div></font></div>
</blockquote></div><br></div>

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