X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f174.google.com ([209.85.220.174] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3639692 for flyrotary@lancaironline.net; Tue, 12 May 2009 10:21:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.174; envelope-from=msteitle@gmail.com Received: by fxm22 with SMTP id 22so3348fxm.19 for ; Tue, 12 May 2009 07:20:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=qCESwzblIcqtjfNACRK+SBTrYxrQ+yCmjstZPQLqkZo=; b=ty2KCQ2GkJyh5aiv3SI7LUoKNgoeP3Sv2EVDz+QLol8iM030K5xgpAgTbipf9GiG/Z wJbaS0MuKqZ/p4fyoTcc+vF6qn/2OFYSNE81rT3a+qHefsYGK13I2kYQtyDfIHu+jY9e 4jzA++I2GcoEwOF/7ewy8fDrpUS3vxVEdcEi4= 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=GBSUFX3oppY6RNqNRqkAc5W0u524B3bDYXGb1kWPKzU8u2rA2wDh0/dfxJtAoJIXIZ J5pC/FN+iF06LCkieh+oBcrLGZMA9snYhiaM/zBWb0bYq/QFRguOuNY5nIw+yU2RCSP+ jJJ1CPQGWWRPnZwu7PszwPuEQT4shAFlIkHxQ= MIME-Version: 1.0 Received: by 10.204.117.201 with SMTP id s9mr8075124bkq.36.1242138053146; Tue, 12 May 2009 07:20:53 -0700 (PDT) In-Reply-To: References: Date: Tue, 12 May 2009 09:20:53 -0500 Message-ID: <5cf132c0905120720l712b103exf0880d20daab6f55@mail.gmail.com> Subject: Re: [FlyRotary] Re: Initial Tuning - Today From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e6d625626b76e00469b7cdb0 --0016e6d625626b76e00469b7cdb0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Jim, 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'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. Another way to diagnose engine problems is with a vacuum gauge. See http://autospeed.com/cms/title_Using-a-Vacuum-Gauge-for-Engine-Diagnostics/A_2393/article.html Mark S. On Tue, May 12, 2009 at 8:56 AM, James Maher wrote: > Mike, > One way to test for intake manifold leaks is to pinch off hoses 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 and that > all bolts are tight. > Jim > > > > --- On *Mon, 5/11/09, Mike Fontenot *wrote: > > From: Mike Fontenot > Subject: [FlyRotary] Re: Initial Tuning - Today > To: "Rotary motors in aircraft" > Date: Monday, May 11, 2009, 3:50 PM > > === JIM, > > I will look at what kinds of adjustments I can make on the Throttle Body. > Wow, that is low RPM!. I had no idea. Problem is I don't know what I don't > know. > > >>> 1. Manifold leak - if this is the case it should be found and fixed > before any tuning is continued. Check all hoses and fittings on the intake > manifold and throttle body. Check that the throttle is closing all the way. > It may need adjustment. <<< > > What technique do you use for leak detection? > > >>>2. Idle setting on throttle body not properly set. If the throttle body > has a idle speed setting > screw (allows air after the throttle plate) try to turn it to reduce the > idle.<<< > > I will look for that. > > > Thanks again > > -- > Mike > > ================================ > Mike Fontenot > Apex Consulting & Services LLC > Lakewood, Colorado > 303 / 731-6645 > mikef AT apexconsultingservices DOT com > ================================ > > --0016e6d625626b76e00469b7cdb0 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Jim,
=A0
I've had good luck finding vacuum leaks using=A0WD-40.=A0 With the= engine running, spray WD-40 around the intake gasket and other places you = suspect a leak.=A0 Since WD-40 is flammable, the engine will change speed i= f it sucks some liquid into the intake.=A0 If the engine speed changes, you= 've found your leak.=A0 For safety purposes, and to keep the WD-40 from= spraying you in the face,=A0you may=A0want to remove the prop.
=A0
Another way to=A0diagnose engine problems=A0is with a vacuum gauge.=A0= See http://autospeed.com/cms/title_Using-a= -Vacuum-Gauge-for-Engine-Diagnostics/A_2393/article.html
Mark S.
=A0
On Tue, May 12, 2009 at 8:56 AM, James Maher <delta11xd@att.net> wrote:
Mike,
One way to test for intake manifold leaks is to pinch off hoses one by= one while the engine is running=A0to see if=A0RPM decreases. You could als= o 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 and t= hat all bolts are tight.
Jim
=A0


--- On Mon, 5/11/09, Mike Fontenot <mikef@apexconsultingse= rvices.com> wrote:
From: Mike Fontenot <mikef@apexconsultingservices.com>
Subject: [FlyRotary] Re: Initial Tuning - Today
To: "Rotary motors = in aircraft" <flyrotary@lancaironline.net>
Date: Monday, May 11, 20= 09, 3:50 PM

=3D=3D=3D JIM,

I will look at what kinds of adjustments I can m= ake on the Throttle Body. Wow, that is low RPM!. I had no idea. Problem is = I don't know what I don't know.

>>> 1. Manifold leak - if this is the case it should be found= and fixed before any tuning is continued. Check all hoses and fittings on = the intake manifold and throttle body. Check that the throttle is closing a= ll the way. It may need adjustment. <<<

What technique do you use for leak detection?

>>>2. Idle setting on throttle body not properly set. If the = throttle body has a idle speed setting
screw (allows air after the throttle plate) try to turn it to reduce t= he idle.<<<

I will look for that.


Thanks again

--
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<= br>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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