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To: flyrotary@lancaironline.net
Subject: Re: [FlyRotary] Re: Vacuum Pulses
Date: Wed, 24 Sep 2008 11:55:29 -0400
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-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 23 Sep 2008 6:51 pm
Subject: [FlyRotary] Re: Vacuum Pulses





Al, after giving some thought about the directions that came with the Mallor=
y pressure regulator, it states that if you are not using a turbo or some ot=
her boost device, to just leave the vacuum port open on the regulator, which=
 may be my best option, as=C2=A0 don't think I have any need to leave it hoo=
ked up.=C2=A0 No sudden acceleration of engine anticipated.=C2=A0 I plan on=20=
doing the orifices for the EC2 though.=C2=A0 JohnD

=C2=A0

Yes, I agree.=C2=A0 I started out with a unit that was not pressure referenc=
ed; for the same reason =E2=80=93 NA.=C2=A0 But it turned out that Tracy=E2=
=80=99s EC2 was setup with the assumption of MAP referenced pressure, and I=20=
had trouble getting it tuned. =C2=A0So I replaced the regulator.=C2=A0 This=20=
was in the early days of the EC2; maybe that more recent versions will tune=20=
fine without MAP reference.

=C2=A0

Al

I agree guys, unless you have a valid ram air scoop. Or any pressure changin=
g device that is connected to your intake. A good ram air will produce eleva=
ted pressure and no MAP reference pressure regulator can make your mixture g=
o lean.
Bill Jepson




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<br>
<br>
<br>
-----Original Message-----<br>
From: Al Gietzen &lt;ALVentures@cox.net&gt;<br>
To: Rotary motors in aircraft &lt;flyrotary@lancaironline.net&gt;<br>
Sent: Tue, 23 Sep 2008 6:51 pm<br>
Subject: [FlyRotary] Re: Vacuum Pulses<br>
<br>


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<div>

<div class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial size=
=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Al, after giving so=
me thought about the directions that came with the Mallory pressure regulato=
r, it states that if you are not using a turbo or some other boos
t device, to just leave the vacuum port open on the regulator, which may be=20=
my best option, as&nbsp; don't think I have any need to leave it hooked up.&=
nbsp; No sudden acceleration of engine anticipated.&nbsp; I plan on doing th=
e orifices for the EC2 though.&nbsp; JohnD</SPAN></FONT></div>


<div class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN styl=
e=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</SPAN></FONT=
></div>


<div class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN styl=
e=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Yes, I agree.&nbsp;=
 I started out with a unit that was not pressure referenced; for the </SPAN>=
</FONT><FONT face=3DVerdana color=3Dblue size=3D2><SPAN style=3D"FONT-SIZE:=20=
11pt; COLOR: blue; FONT-FAMILY: Verdana">sam</SPAN></FONT><FONT face=3DVerda=
na color=3Dblue size=3D2><SPAN style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-F=
AMILY: Verdana">e reason =E2=80=93 NA.&nbsp; But it turned out that </SPAN><=
/FONT><FONT face=3DVerdana color=3Dblue size=3D2><SPAN style=3D"FONT-SIZE: 1=
1pt; COLOR: blue; FONT-FAMILY: Verdana">Tracy</SPAN></FONT><FONT face=3DVerd=
ana color=3Dblue size=3D2><SPAN style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-=
FAMILY: Verdana">=E2=80=99s EC2 was setup with the assumption of MAP referen=
ced pressure, and I had trouble getting it tuned. &nbsp;So I replaced the re=
gulator.&nbsp; This was in the early days of the EC2; maybe that more recent=
 versions will tune fine without MAP reference.</SPAN></FONT></div>


<div class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN styl=
e=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</SPAN></F  O=
NT></div>


<div class=3DMsoNormal><FONT face=3DVerdana color=3Dblue size=3D2><SPAN styl=
e=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Al<br>
<br>
<FONT color=3D#ff0000>I agree guys, unless you have a valid ram air scoop. O=
r any pressure changing device that is connected to your intake. A good ram=20=
air will produce elevated pressure and no MAP reference pressure regulator c=
an make your mixture go lean.<br>
Bill Jepson</FONT></SPAN></FONT></div>
</div>
</div>
</div>
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