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Message-ID: <5cf132c0704081307m76452a75x60968fd099f3eb35@mail.gmail.com>
Date: Sun, 8 Apr 2007 15:07:00 -0500
From: "Mark Steitle" <msteitle@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] EC2 injector driver change
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Al,
I had mine FP set about 10 psi low (mid 20's) and it idled great, running
550cc injectors in both primary and secondary.  The EM-2 was showing psi in
the high teens at idle.  We'll see if I can get it to run as well with 36
psi FP.

Mark S.


On 4/8/07, Al Gietzen <ALVentures@cox.net> wrote:
>
>   Mark,
>
> I found that the lower I set it, the better I could idle.  So I loosened
> up the screw all the way.  that gave me about 40 psi with the engine off and
> 32 psi at idle (manifold referenced).  I can idle as low as 800-900 but it
> is not smooth.  It really will not run smoothly until up around 1200-1400
> rpm.
>
> David Leonard
>
> I also use 40 psi, engine off; drop to about 32 at idle.  My experience is
> very the same; and that is running with the staging reversed; i.e., it
> uses the secondary only (slightly lower flow, MSD injectors out in the TB)
> at idle.  Using the 560 CC primary only the idle is terrible, and doesn't
> smooth out until above 2000. The mixture is too rich, and as it is reduced;
> before it smoothes out - the engine dies.  I think this is very indicative
> of the pulse clamping issue.
>
>
>
> I haven't tried lower FP.  That should help, but may have other
> disadvantages in injector spray pattern, etc.
>
>
>
> Al
>
>
>

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<div>Al, </div>
<div>I had mine FP set about 10 psi low (mid 20&#39;s) and it idled great, running 550cc injectors in both primary and secondary.&nbsp; The EM-2 was showing psi in the high teens at idle.&nbsp; We&#39;ll see if I can get it to run&nbsp;as well with 36 psi FP.
</div>
<div>&nbsp;</div>
<div>Mark S.&nbsp; <br><br>&nbsp;</div>
<div><span class="gmail_quote">On 4/8/07, <b class="gmail_sendername">Al Gietzen</b> &lt;<a href="mailto:ALVentures@cox.net">ALVentures@cox.net</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" vlink="blue" link="blue">
<div>
<div>
<p style="MARGIN-LEFT: 0.5in"><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">Mark,</span></font></p></div>
<div>
<p style="MARGIN-LEFT: 0.5in"><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">I found that the lower I set it, the better I could idle.&nbsp; So I loosened up the screw all the way.&nbsp; that gave me about 40 psi with the engine off and 32 psi at idle (manifold referenced).&nbsp; I can idle as low as 800-900 but it is not smooth.&nbsp; It really will not run smoothly until up around 1200-1400 rpm. 
</span></font></p></div>
<p style="MARGIN-LEFT: 0.5in"><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">David Leonard</span></font><br><br></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">I also use 40 psi, engine off; drop to about 32 at idle.&nbsp; My experience is very the </span></font><font face="Verdana" color="blue" size="2">
<span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">sam</span></font><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">e; and that is running with the staging reversed; 
i.e., it uses the secondary only (slightly lower flow, MSD injectors out in the TB) at idle.&nbsp; Using the 560 CC primary only the idle is terrible, and doesn't smooth out until above 2000. The mixture is too rich, and as it is reduced; before it smoothes out - the engine dies.&nbsp; I think this is very indicative of the pulse clamping issue.
</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">I haven't tried lower FP.&nbsp; That should help, but may have other disadvantages in injector spray pattern, etc.
</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Al</span></font></p>
<p style="MARGIN-LEFT: 0.5in"><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">&nbsp;</span></font></p></div></div></blockquote></div><br>

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