X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 27 Nov 2006 12:30:51 -0500 Message-ID: X-Original-Return-Path: Received: from secure5.liveoakhosting.com ([64.49.254.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTPS id 1612743 for lml@lancaironline.net; Mon, 27 Nov 2006 12:22:48 -0500 Received-SPF: none receiver=logan.com; client-ip=64.49.254.21; envelope-from=walter@advancedpilot.com Received: (qmail 1690 invoked from network); 27 Nov 2006 11:22:20 -0600 Received: from 216-107-97-170.wan.networktel.net (HELO ?10.0.1.3?) (216.107.97.170) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 27 Nov 2006 11:22:20 -0600 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-5--490100979 X-Original-Message-Id: <31A54A85-14A7-4B0F-B4C1-91AAC7BD6769@advancedpilot.com> From: Walter Atkinson Subject: Re: [LML] Re: New (2006) TSIO550E Lean of Peak (LOP) Operation X-Original-Date: Mon, 27 Nov 2006 11:22:56 -0600 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-5--490100979 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed I shoot for a .3 GAMI spread or better. Some engines can run acceptably smooth with a .4 spread. Frankly, yours are not much better than many of the old standard TCM injectors. I'd want TCM to fix that, or give me a refund. Walter On Nov 27, 2006, at 11:00 AM, Gary Casey wrote: > It appears as though the peaks below are obtained by looking at the > last fuel flow setting that was obtained before the temperature > started to drop. My usual method is to plot the temperature > against fuel flow and then pick a "best fit" straight line on the > rich and lean sides. The interstections of these straight lines is > the fuel flow I use for peak. This is a lot of manual labor, > probably mostly because I have taken the data manually and then > plotted it in the same way, not being a Excel expert. Which is the > best way? > Gary Casey >> >> From: "Jeffrey Liegner, MD" >> Date: November 26, 2006 6:44:05 PM PST >> To: lml@lancaironline.net >> Subject: Re: New (2006) TSIO550E Lean of Peak (LOP) Operations >> >> >> George is the most renowned advisor on tuned injectors and engine >> management. >> >> What I thought was a fairly tight grouping of EGT peaks with the >> new TCM engine appears to be less than optimum compared to GAMI >> standards. >> >> Replotting the data with more carefully analysis at the peak temps: >> PEAK Fuel Flow >> Cylinder 1: 21.1 gph >> Cylinder 2: 21.6 gph >> Cylinder 3: 21.1 gph >> Cylinder 4: 21.8 gph >> Cylinder 5: 21.0 gph >> Cylinder 6: 21.6 gph >> >> Spread: 0.8 gallons per hour >> >> >> (This stuff is fascinating) >> >>> Posted for "George Braly" : >>> >>> Jeffrey, >>> If that is a TCM copy of GAMI's fuel injector set up, they >>> you need >>> to ask for your money back. >>> That is a fairly lousy set of fuel /air ratios. >>> Your #4 consistently is the leanest cylinder and your # 1 & 5 >>> are >>> consistently rather much richer ( by 1 gph or so). >>> This is not a trivial issue for one of the se engines. They >>> tend to >>> operate much better with the F/A ratios such that the spread in >>> fuel >>> flows is down around 0.3 gph. >>> Regards, George >>> > --Apple-Mail-5--490100979 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 I=A0shoot for a .3 GAMI spread = or better.=A0 Some engines can run acceptably smooth with a .4 = spread.

Frankly, = yours are not much better than many of the old standard TCM injectors.=A0 = I'd want TCM to fix that, or give me a refund.

Walter

On Nov 27, = 2006, at 11:00 AM, Gary Casey wrote:

It appears = as though the peaks below are obtained by looking at the last fuel flow = setting that was obtained before the temperature started to drop.=A0 My = usual method is to plot the temperature against fuel flow and then pick = a "best fit" straight line on the rich and lean sides.=A0 The = interstections of these straight lines is the fuel flow=A0 I use for = peak.=A0 This is a lot of manual labor, probably mostly because I have = taken the data manually and then plotted it in the same way, not being a = Excel expert.=A0 Which is the best way?
Gary = Casey

From: "Jeffrey Liegner, MD" <liegner@earthlink.net>=
Date: November 26, 2006 6:44:05 PM = PST
To: lml@lancaironline.net
Subject: Re: New (2006) TSIO550E Lean of Peak = (LOP) Operations

=
George is the most renowned advisor on tuned injectors and engine = management.

What I thought was a fairly tight = grouping of EGT peaks with the new TCM engine appears to be less than = optimum compared to GAMI standards.

=
Replotting the data with more carefully analysis at the peak = temps:

=A0=A0=A0=A0=A0=A0=A0 = PEAK=A0=A0=A0 Fuel Flow
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 1: 21.1 gph
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 2: 21.6 gph
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 3: 21.1 gph
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 4: 21.8 gph
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 5: 21.0 gph
=
=A0=A0=A0=A0=A0=A0=A0 Cylinder 6: 21.6 gph
=

Spread: 0.8 gallons per hour

=
<P5460A83F_10>
=A0=A0=A0=A0=A0=A0= =A0 =A0=A0=A0=A0=A0=A0=A0 (This stuff is = fascinating)

Posted for "George Braly" <gwbraly@gami.com>:

= =A0Jeffrey,
=A0=A0=A0 If=A0 that is a TCM copy of=A0 GAMI's fuel = injector set up,=A0 they you need
=A0to ask for your money back.
= =A0=A0=A0 That is a fairly lousy set of=A0 fuel /air ratios.
=A0=A0=A0= Your #4 consistently is the leanest cylinder and your # 1 & 5 = are
=A0consistently rather much richer ( by 1 gph or so).
=A0=A0=A0= This is not a trivial issue for one of the se engines.=A0=A0 They tend = to
=A0operate much better with the=A0 F/A ratios such that the = spread in fuel
=A0flows is down around 0.3 gph.
=A0=A0=A0 = Regards,=A0 George
=A0
=

= --Apple-Mail-5--490100979--