Return-Path: Received: from [65.54.168.125] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568531 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 11:13:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.125; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 15 Dec 2004 08:13:05 -0800 Message-ID: Received: from 65.54.98.102 by BAY3-DAV21.phx.gbl with DAV; Wed, 15 Dec 2004 16:13:00 +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] Re: Injectors Date: Wed, 15 Dec 2004 11:10:21 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C6_01C4E296.AAF03FE0" 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 11:10:21 -0500 X-OriginalArrivalTime: 15 Dec 2004 16:13:05.0010 (UTC) FILETIME=[F54A4520:01C4E2C0] This is a multi-part message in MIME format. ------=_NextPart_000_00C6_01C4E296.AAF03FE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable One more comment on 'rich at idle (400 - 1400 rpm) . It is normal for = engines to run rich under idle conditions, they won't run any other way = due to the low pressure in the combustion chamber. I can run mixtures = below what the monitor will read (zero bars lit) at cruise, but the = engine will stop if I attempt to run that lean at idle. Tracy ----- Original Message -----=20 From: Steve Brooks=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 15, 2004 8:08 AM Subject: [FlyRotary] Re: Injectors Al, I don't know what you mean by running out of adjustment. Do you = mean that turning the mixture knob fully CC it's still to rich? If so; = follow mode 1 instructions and program it much leaner. However, I don't = think that's the only issue. I could get mine lean enough, but still = not get smooth running at low power on those stock primary injectors. I = lowered the fuel pressure by 10 psi and found no noticeable improvement. Yes, Leaning in mode 1 as low as it will go, still results in a = rich mixture. I really don't have any issues with it running rich, it = runs really smooth, even down to about 400 RPM's. I'm just getting = allot of carbon around the exhaust, and the A/F gauge has all but the = last light lit. If I run the fuel pressure up, all the lights are lit. = I don't get any controll over it until about 3000 rpm's. It begs the question: What did Mazda do to get good idle on those = big injectors that we are not doing? I'm sure that Mazda's ECU works different than Tracy's. It probably = could shorten the pulse enough at low RPM's to keep the mixture in line. = I've adjusted the injector setting also, and it helped, but I really = can't go any lower, because the high power mixture is starting to go = lean. I beleive that John Slade also has a rich mixture issue, but I'm not = sure that it's only at low power. Using the 440cc injectors may help; but I don't think there is any = assurance that they will work well. Didn't Rusty try this? I don't remember it, but he may have. ------=_NextPart_000_00C6_01C4E296.AAF03FE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

One more comment on 'rich at idle (400 - 1400=20 rpm) . It is normal for engines to run rich = under=20 idle conditions, they won't run any other way due to the low pressure in = the=20 combustion chamber. I can run mixtures below what the = monitor will=20 read (zero bars lit) at cruise, but the engine will stop if I attempt to = run=20 that lean at idle.

Tracy

----- Original Message -----

From: Steve=20 Brooks

To: Rotary motors in = aircraft

Sent: Wednesday, December 15, = 2004 8:08=20 AM

Subject: [FlyRotary] Re: = Injectors

Al,

I = don=92t know what=20 you mean by running out of adjustment. Do you mean that = turning the=20 mixture knob fully CC it=92s still to rich? If so; follow mode = 1=20 instructions and program it much leaner. However, I don=92t = think that=92s=20 the only issue. I could get mine lean enough, but still not = get smooth=20 running at low power on those stock primary injectors. I = lowered the=20 fuel pressure by 10 psi and found no noticeable=20 improvement.

Yes, Leaning in mode 1 as low as it = will go,=20 still results in a rich mixture. I really don't have any = issues with=20 it running rich, it runs really smooth, even down to about 400 = RPM's. =20 I'm just getting allot of carbon around the exhaust, and the A/F = gauge has=20 all but the last light lit. If I run the fuel pressure up, all = the=20 lights are lit. I don't get any controll over it until about = 3000=20 rpm's.

It begs = the=20 question: What did Mazda do to get good idle on those big injectors = that we=20 are not doing?

I'm sure that Mazda's ECU works different = than=20 Tracy's. It probably could shorten the pulse enough at low = RPM's to=20 keep the mixture in line. I've adjusted the injector setting = also, and=20 it helped, but I really can't go any lower, because the high power = mixture=20 is starting to go lean.

I beleive that John Slade also has a rich = mixture=20 issue, but I'm not sure that it's only at low=20 power.

Using = the 440cc=20 injectors may help; but I don=92t think there is any assurance that = they will=20 work well. Didn=92t Rusty try this?

I don't = remember it,=20 but he may=20 have.

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