X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from bay0-omc3-s8.bay0.hotmail.com ([65.54.246.208] verified) by logan.com (CommuniGate Pro SMTP 5.1.4) with ESMTP id 1761230 for flyrotary@lancaironline.net; Mon, 15 Jan 2007 16:44:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.208; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.81]) by bay0-omc3-s8.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Mon, 15 Jan 2007 13:43:45 -0800 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 15 Jan 2007 13:43:44 -0800 Message-ID: Received: from 4.171.129.157 by BAY115-DAV9.phx.gbl with DAV; Mon, 15 Jan 2007 21:43:42 +0000 X-Originating-IP: [4.171.129.157] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: engine surging at low manifold pressure Date: Mon, 15 Jan 2007 16:43:37 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_008A_01C738C4.4DD504E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Mon, 15 Jan 2007 16:43:37 -0500 X-OriginalArrivalTime: 15 Jan 2007 21:43:44.0270 (UTC) FILETIME=[3AC4DAE0:01C738EE] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_008A_01C738C4.4DD504E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Steve is right, ALL engines need a richer mixture at idle. Don't shoot = for the middle of the mixture range like you do when tuning at all other = throttle settings. Those bottom 2 EC2 MAP table addresses should = normally be set richer than the ones above that. Successful EC2 tuning comes only with understanding (read the [boring] = setup guide theory of operation) and practice. Leave out either one and = frustration is assured. Tracy (working on a closed loop version of EC2 software) ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Monday, January 15, 2007 8:44 AM Subject: [FlyRotary] Re: engine surging at low manifold pressure Lou, If the engine is surging, it's too lean. When it does it, try = turning the mixture control to rich, as a test. It should stop the surging when = you make it richer. You'll probably find that you have to turn the = mixture knob to at least the 3 o'clock position or more to stop the surge. At lower RPM's the mixture has to be pretty rich to run smooth. = You'll probably have to tune the idle by how it runs and sounds rather than = the O2 sensor. Steve Brooks -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of lou rubin Sent: Sunday, January 14, 2007 2:11 PM To: Rotary motors in aircraft Subject: [FlyRotary] engine surging at low manifold pressure We have recently tuned the Ec2 on a 20B & although it has helped it run a little smoother we still get alot of roughness & surging at idle from 15 to 18 inches Mp& especially when pulling back power Has anyone experienced this problem? The plane has been run on the ground, however the problem was just as bad in air in a descent. Lou & Paul N ES 117ES = _________________________________________________________________________= ___ ________ Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. = http://answers.yahoo.com/dir/?link=3Dlist&sid=3D396546091 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_008A_01C738C4.4DD504E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Steve is right,  ALL engines need a richer mixture at = idle. =20 Don't shoot for the middle of the mixture range like you do when tuning = at all=20 other throttle settings.  Those bottom 2 EC2 MAP table addresses = should=20 normally be set richer than the ones above that.
 
Successful EC2 tuning comes only with understanding (read the = [boring]=20 setup guide theory of operation) and practice.  Leave out either = one and=20 frustration is assured.
 
Tracy  (working on a closed loop version of EC2 = software)
----- Original Message -----
From: Steve=20 Brooks
To: Rotary motors in = aircraft
Sent: Monday, January 15, 2007 = 8:44=20 AM
Subject: [FlyRotary] Re: engine = surging=20 at low manifold pressure

Lou,
If the engine is surging, it's too = lean.  =20 When it does it, try turning the
mixture control to rich, as a = test. =20 It should stop the surging when you
make it richer.  You'll = probably=20 find that you have to turn the mixture knob
to at least the 3 = o'clock=20 position or more to stop the surge.

At lower RPM's the mixture = has to=20 be pretty rich to run smooth.  You'll
probably have to tune = the idle=20 by how it runs and sounds rather than the O2
sensor.

Steve=20 Brooks


-----Original Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of lou=20 rubin
Sent: Sunday, January 14, 2007 2:11 PM
To: Rotary motors = in=20 aircraft
Subject: [FlyRotary] engine surging at low manifold=20 pressure

We have recently tuned the Ec2 on a 20B & although = it
has helped it run a little smoother we still get alot
of = roughness=20 & surging at idle from 15 to 18 inches
Mp& especially when = pulling=20 back power Has anyone
experienced this problem? The plane has been = run=20 on
the ground, however the problem was just as bad in air
in a=20 descent.

Lou & Paul  N ES=20 = 117ES




________________________________________________= ____________________________
________
Need=20 Mail bonding?
Go to the Yahoo! Mail Q&A for great tips from = Yahoo!=20 Answers users.
ht= tp://answers.yahoo.com/dir/?link=3Dlist&sid=3D396546091

--=
Homepage: =20 http://www.flyrotary.com/
Archi= ve and=20 UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/


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Homepage: =20 http://www.flyrotary.com/
Archi= ve and=20 UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
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