X-Virus-Scanned: clean according to Sophos on Logan.com
Return-Path: <rwstracy@gmail.com>
Received: from mail-wy0-f180.google.com ([74.125.82.180] verified)
  by logan.com (CommuniGate Pro SMTP 5.4c3j)
  with ESMTPS id 4962767 for flyrotary@lancaironline.net; Sat, 30 Apr 2011 13:22:15 -0400
Received-SPF: pass
 receiver=logan.com; client-ip=74.125.82.180; envelope-from=rwstracy@gmail.com
Received: by wyj26 with SMTP id 26so3503702wyj.25
        for <flyrotary@lancaironline.net>; Sat, 30 Apr 2011 10:21:38 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:mime-version:in-reply-to:references:date
         :message-id:subject:from:to:content-type;
        bh=vhvgQm5xluUon6riLfnBukzz6+N88grMtL0pPzj4zPs=;
        b=vgaQQAmULus1UUilzQYtac7BjdkcR3ursxNrs4tSEWuVZHB4stSEJxfY28qbPRxqaJ
         1NqqCYne01kigzFDNaj7cWtzqSAZlgOFQvD45838AkQJp7G+e0sTGzooDRgRp30+RRtI
         dXuuMRZlD4m2RCYC2+YaFZxSImOOxT8M4YYaw=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        b=miQpIC3DfPc0MawR4oTNc9ho5blG8NGh2MFWo0ckyRDSooJ7zQcocCSZh12BZ61j/R
         +KFWhVObNDyEtHF1MoubOvTk1mc/FJKZVBqjsRvzBOJgdQCa2W08fbGqV50r8OmXVzCw
         fTvLH7KmIrIs5ZHbvcjqJdp7jrx1gYuqwetGo=
MIME-Version: 1.0
Received: by 10.216.28.200 with SMTP id g50mr2652736wea.92.1304184098684; Sat,
 30 Apr 2011 10:21:38 -0700 (PDT)
Received: by 10.216.190.132 with HTTP; Sat, 30 Apr 2011 10:21:38 -0700 (PDT)
In-Reply-To: <list-4962739@logan.com>
References: <list-4962739@logan.com>
Date: Sat, 30 Apr 2011 13:21:38 -0400
Message-ID: <BANLkTikB83vBHJFMnUgoyUyXijXZZdbGEw@mail.gmail.com>
Subject: Re: [FlyRotary] Timing tuning
From: Tracy <rwstracy@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=0016e6de0029ec7eee04a226052d

--0016e6de0029ec7eee04a226052d
Content-Type: text/plain; charset=ISO-8859-1

I tried to verify the static timing (using the no-suction/no-pressure method
to find TDC). It seems to be around 30 degrees BTDC.
what should I be looking at for optimal timing?

Finn

Whatever works best.   I usually go up to 5000 ft or so on a dead calm day,
set 24" MP  (no vacuum advance there or higher), trim the plane for level
flight then advance the timing for max rpm (digital tach needed).   If any
step of timing advance does not result in an rpm increase, back off the
timing 1 step and leave it there.    Mazda's numbers are good.  This usually
happens at around 24 - 25 BTDC of ACTUAL ignition timing.

  DO NOT confuse static timing of the CAS with ignition advance.  There is
NO relationship between them.

Tracy

On Sat, Apr 30, 2011 at 12:26 PM, Finn Lassen <finn.lassen@verizon.net>wrote:

> I recently got interested in timing.
>
> I tried to verify the static timing (using the no-suction/no-pressure
> method to find TDC). It seems to be around 30 degrees BTDC.
>
> Now, here's the question:
> Using Mode 8 I can adjust the timing +/- 10 degrees. But what should I be
> looking at for optimal timing?
> EGTs, RPM, Mixture, what?
>
> Finn
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>

--0016e6de0029ec7eee04a226052d
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

I tried to verify the static timing (using the no-suction/no-pressure=20
method to find TDC). It seems to be around 30 degrees BTDC.<br>what should =
I be looking at for optimal timing?<br><br>Finn<br><br>Whatever works best.=
=A0=A0 I usually go up to 5000 ft or so on a dead calm day, set 24&quot; MP=
=A0 (no vacuum advance there or higher), trim the plane for level flight th=
en advance the timing for max rpm (digital tach needed).=A0=A0 If any step =
of timing advance does not result in an rpm increase, back off the timing 1=
 step and leave it there.=A0=A0=A0 Mazda&#39;s numbers are good.=A0 This us=
ually happens at around 24 - 25 BTDC of ACTUAL ignition timing. <br>
<br>=A0 DO NOT confuse static timing of the CAS with ignition advance.=A0 T=
here is NO relationship between them.<br><br>Tracy<br><br><div class=3D"gma=
il_quote">On Sat, Apr 30, 2011 at 12:26 PM, Finn Lassen <span dir=3D"ltr">&=
lt;<a href=3D"mailto:finn.lassen@verizon.net">finn.lassen@verizon.net</a>&g=
t;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">I recently got interested in timing.<br>
<br>
I tried to verify the static timing (using the no-suction/no-pressure metho=
d to find TDC). It seems to be around 30 degrees BTDC.<br>
<br>
Now, here&#39;s the question:<br>
Using Mode 8 I can adjust the timing +/- 10 degrees. But what should I be l=
ooking at for optimal timing?<br>
EGTs, RPM, Mixture, what?<br>
<br>
Finn<br><font color=3D"#888888">
<br>
--<br>
Homepage: =A0<a href=3D"http://www.flyrotary.com/" target=3D"_blank">http:/=
/www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br>
</font></blockquote></div><br><div style=3D"visibility: hidden; left: -5000=
px; position: absolute; z-index: 9999; padding: 0px; margin-left: 0px; marg=
in-top: 0px; overflow: hidden; word-wrap: break-word; color: black; font-si=
ze: 10px; text-align: left; line-height: 130%;" id=3D"avg_ls_inline_popup">
</div>

--0016e6de0029ec7eee04a226052d--