Return-Path: Received: from [65.54.168.116] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568488 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 10:38:31 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.116; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 15 Dec 2004 07:38:01 -0800 Message-ID: Received: from 65.54.98.102 by BAY3-DAV12.phx.gbl with DAV; Wed, 15 Dec 2004 15:37:53 +0000 X-Originating-IP: [65.54.98.102] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Injectors & EC2 adjustments Date: Wed, 15 Dec 2004 10:35:14 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0074_01C4E291.C3460DE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Wed, 15 Dec 2004 10:35:14 -0500 X-OriginalArrivalTime: 15 Dec 2004 15:38:01.0140 (UTC) FILETIME=[0F492F40:01C4E2BC] This is a multi-part message in MIME format. ------=_NextPart_000_0074_01C4E291.C3460DE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Steve, (assuming you are using the EC2 AND that you are using a proper 3 port = fuel pressure regulator which adjusts pressure with manifold pressure) = I also assume you are saying that mixture is too rich even though the = mixture control is at leanest setting? If you have already adjusted the mixture as lean as possible at low = throttle using Mode 1 or 9, you need to do the following: On the ground with airplane restrained, run engine at about 25" Hg MAP. = In Mode 3, LEAN the mixture about 3 - 4 steps. Go to low throttle where you were too rich and see if mixture can be = made right using Mode 1 or 9. If not, go back to MODE 3 and adjust = leaner a couple of steps. Repeat until you can get mixture in proper range at low throttle. =20 After doing this, you may find that mixture is too lean at higher = throttle settings. If so, adjust richer where needed using Mode 1 or 9. Make sure you know exactly how the different Modes work. They are not = the same. See instructions for details. Change injectors and other hardware only after you are sure the problem = can't be solved by adjustments. Tracy (working on automatic program mode for EC2) ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Tuesday, December 14, 2004 9:07 PM Subject: [FlyRotary] Injectors One nagging problem that I have is the engine running rich at low = power levels. I've turned the fuel pressure regulator down to 30 lbs to get = it reasonably lean, but I still don't have enough adjustment. The higher = power levels have a pretty good mixture on the default tuning. Right now I'm running the stock 550cc injectors, but I'm considering changing the primary injectors to 440cc, to help the low end mixture, = and leave the secondaries at 550cc, so that I still get sufficient fuel = flow with the turbo at higher power settings. My thinking is that the 440cc injectors would allow me turn the fuel pressure back up to 38 lbs. and hopefully still be able to tune the = lower end where only the primary injectors are supplying fuel. Does anyone have experience doing this, hopefully with a turbo, or = just have an opinion ? Steve Brooks >> Homepage: http://www.flyrotary.com/ >> Archive: = http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0074_01C4E291.C3460DE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Steve,
 (assuming you are using the EC2 AND that you are using a = proper 3=20 port fuel pressure regulator which adjusts pressure with manifold=20 pressure)  I also assume you are saying that mixture is too rich = even=20 though the mixture control is at leanest setting?
 
If you have already adjusted the mixture as lean as possible = at low=20 throttle using Mode 1 or 9, you need to do the following:
On the ground with airplane restrained, run engine at about 25" Hg=20 MAP.  In Mode 3, LEAN the mixture about 3 - 4 steps.
Go to low throttle where you were too rich and see if mixture = can=20 be made right using Mode 1 or 9.  If not, go back to MODE = 3 and=20 adjust leaner a couple of steps.
 
Repeat until you can get mixture in proper range at low=20 throttle.  
 
After doing this, you may find that mixture is too lean at higher = throttle=20 settings.  If so, adjust richer where needed using Mode 1 or = 9.
 
Make sure you know exactly how the different Modes work.  They = are not=20 the same.  See instructions for details.
 
Change injectors and other hardware only after you are sure the = problem=20 can't be solved by adjustments.
 
Tracy  (working on automatic program mode for EC2)
 
----- Original Message -----
From: Steve=20 Brooks
To: Rotary motors in = aircraft
Sent: Tuesday, December 14, = 2004 9:07=20 PM
Subject: [FlyRotary] = Injectors

One nagging problem that I have is the engine running = rich at=20 low power
levels.  I've turned the fuel pressure regulator = down to 30=20 lbs to get it
reasonably lean, but I still don't have enough=20 adjustment.  The higher power
levels have a pretty good = mixture on the=20 default tuning.

Right now I'm running the stock 550cc = injectors, but=20 I'm considering
changing the primary injectors to 440cc, to help = the low=20 end mixture, and
leave the secondaries at 550cc, so that I still = get=20 sufficient fuel flow
with the turbo at higher power = settings.

My=20 thinking is that the 440cc injectors would allow me turn the = fuel
pressure=20 back up to 38 lbs. and hopefully still be able to tune the = lower
end where=20 only the primary injectors are supplying fuel.

Does anyone have = experience doing this, hopefully with a turbo, or just have
an = opinion=20 ?

Steve Brooks


>>  Homepage:  http://www.flyrotary.com/
>&= gt; =20 Archive:   http://lancai= ronline.net/lists/flyrotary/List.html
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