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Date: Wed, 13 May 2009 14:53:36 -0700 (PDT)
From: James Maher <delta11xd@att.net>
Reply-To: delta11xd@att.net
Subject: Re: [FlyRotary] Re: Initial Tuning
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-3641393@logan.com>
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Mike,
Are you using Throttle Body Fuel injection or multiport FI?


--- On Wed, 5/13/09, Mike Fontenot <mikef@apexconsultingservices.com> wrote=
:

From: Mike Fontenot <mikef@apexconsultingservices.com>
Subject: [FlyRotary] Re: Initial Tuning
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Wednesday, May 13, 2009, 3:16 PM


Thanks guys,

Great ideas on ways to check the throttle body for leaks.=A0 This weekend I=
 will tackle the alternator no-power problem. Then move forward.
Jim: injectors are the originals on the brand new engine, so I have to assu=
me they are the correct size.=20

>>WD-40 - I've had good luck finding vacuum leaks using WD-40. With the eng=
ine running, spray WD-40 around the intake gasket and other places you susp=
ect a leak. Since WD-40 is flammable, the engine will change speed if it su=
cks some liquid into the intake. If the engine speed changes, you've found =
your leak. For safety purposes, and to keep the WD-40 from spraying you in =
the face, you may want to remove the prop.

VACUUM GAUGE - Another way to diagnose engine problems is with a vacuum gau=
ge. See http://autospeed.com/cms/title_Using-a-Vacuum-Gauge-for-Engine-Diag=
nostics/A_2393/article.html
Mark S.

PINCH HOSE - One way to test for intake manifold leaks is to pinch off hose=
s one by one while the engine is running to see if RPM decreases. You could=
 also remove the each hose at the manifold an plug the inlet. Also be sure =
that the intake manifold gasket and throttle body gasket are sealing good a=
nd that all bolts are tight.

FUEL INJECTORS - Are you using the right fuel injector for your application=
?=20
YES - ORIGINALS
Such large jumps may be due to improper injector sizing.
The Geo engine is a fuel sipper rather than a gas guzzler so it would requi=
re
an injector that can meter fuel much more precisely.
<<

--=20
Mike

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

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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><DIV>Mike,</DIV>
<DIV>Are you using Throttle Body Fuel injection or multiport FI?</DIV>
<DIV><BR><BR>--- On <B>Wed, 5/13/09, Mike Fontenot <I>&lt;mikef@apexconsult=
ingservices.com&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(=
16,16,255) 2px solid">From: Mike Fontenot &lt;mikef@apexconsultingservices.=
com&gt;<BR>Subject: [FlyRotary] Re: Initial Tuning<BR>To: "Rotary motors in=
 aircraft" &lt;flyrotary@lancaironline.net&gt;<BR>Date: Wednesday, May 13, =
2009, 3:16 PM<BR><BR>
<DIV id=3Dyiv230759776>Thanks guys,<BR><BR>Great ideas on ways to check the=
 throttle body for leaks.&nbsp; This weekend I will tackle the alternator n=
o-power problem. Then move forward.<BR>Jim: injectors are the originals on =
the brand new engine, so I have to assume they are the correct size. <BR><B=
R>&gt;&gt;WD-40 - I've had good luck finding vacuum leaks using WD-40. With=
 the engine running, spray WD-40 around the intake gasket and other places =
you suspect a leak. Since WD-40 is flammable, the engine will change speed =
if it sucks some liquid into the intake. If the engine speed changes, you'v=
e found your leak. For safety purposes, and to keep the WD-40 from spraying=
 you in the face, you may want to remove the prop.<BR><BR>VACUUM GAUGE - An=
other way to diagnose engine problems is with a vacuum gauge. See <A href=
=3D"http://autospeed.com/cms/title_Using-a-Vacuum-Gauge-for-Engine-Diagnost=
ics/A_2393/article.html" target=3D_blank
 rel=3Dnofollow>http://autospeed.com/cms/title_Using-a-Vacuum-Gauge-for-Eng=
ine-Diagnostics/A_2393/article.html</A><BR>Mark S.<BR><BR>PINCH HOSE - One =
way to test for intake manifold leaks is to pinch off hoses one by one whil=
e the engine is running to see if RPM decreases. You could also remove the =
each hose at the manifold an plug the inlet. Also be sure that the intake m=
anifold gasket and throttle body gasket are sealing good and that all bolts=
 are tight.<BR><BR>FUEL INJECTORS - Are you using the right fuel injector f=
or your application? <BR>YES - ORIGINALS<BR>Such large jumps may be due to =
improper injector sizing.<BR>The Geo engine is a fuel sipper rather than a =
gas guzzler so it would require<BR>an injector that can meter fuel much mor=
e precisely.<BR>&lt;&lt;<BR clear=3Dall><BR>-- <BR>Mike<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; Services LLC<BR>Lakewoo=
d, Colorado<BR>303 / 731-6645<BR>mikef AT
 apexconsultingservices 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></DIV></BLOCKQ=
UOTE></td></tr></table>
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