X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 17 Nov 2008 08:36:25 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3303308 for lml@lancaironline.net; Sun, 16 Nov 2008 19:59:58 -0500 Received: from Sky2high@aol.com by imo-d05.mx.aol.com (mail_out_v39.1.) id q.d10.3cc37a45 (41809) for ; Sun, 16 Nov 2008 19:59:53 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Sun, 16 Nov 2008 19:59:53 EST Subject: Re: [LML] Fine Tuning EGT's X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1226883593" X-Mailer: AOL 9.1 sub 5000 X-Spam-Flag:NO -------------------------------1226883593 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Tom, Have you run the Gami Lean test? _http://gami.com/_ (http://gami.com/) You may be just fine. GAMI's approach is to better balance the fuel/air ration so that all the cylinders are producing the same power in the flight regime where you spend the most time. The lean test looks at the fuel spread amongst the cylinders and will correct any gross disparity by altering the size of the offending cylinder's injector. Of course, if you are not injected, the problem is more difficult because of the inherent different in air/fuel distribution. Injectors open to the upper cooling plenum can see different pressures, thus different atomization effects. Anyway, run the lean test and report back. Grayhawk In a message dated 11/16/2008 5:02:10 P.M. Central Standard Time, dudewanarace@yahoo.com writes: I have been chasing a problem with my EGT's and have hit a wall. My #3 EGT is about 80 degrees above the rest of the cylinders. It also has the highest CHT, but only by 10 degrees over #4. Yet #4 has one of the coolest EGT's... #2 is the first to peak while leaning. So how many gallons did Jimmy have left in his bucket after Jane.... Just kidding. Sounded like a math quiz. A better way to explain it, see graph below. http://www.n54sg.com/images/egt.jpg I have done everything I know to do and can't seem to figure it out. I have switched injectors from #4 and #3 thinking the injector may have been the problem. Didn't seem to change anything. I have done my best to check for a leak in the intake system. Couldn't find anything. Attached is the data that goes with the graph. It is a Superior XP-400SRE prototype so I don't exactly have anything to base my data on. Anybody have any ideas? Tom McNerney www.N54SG.com -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html **************Get the Moviefone Toolbar. Showtimes, theaters, movie news & more!(http://pr.atwola.com/promoclk/100000075x1212774565x1200812037/aol?redir=htt p://toolbar.aol.com/moviefone/download.html?ncid=emlcntusdown00000001) -------------------------------1226883593 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Tom,
 
Have you run the Gami Lean test? http://gami.com/ 
 
You may be just fine.  GAMI's approach is to better balance the=20 fuel/air ration so that all the cylinders are producing the same power in th= e=20 flight regime where you spend the most time.  The lean test looks at th= e=20 fuel spread amongst the cylinders and will correct any gross disparity by=20 altering the size of the offending cylinder's injector.  Of course, if=20= you=20 are not injected, the problem is more difficult because of the inherent= =20 different in air/fuel distribution.  Injectors open to the upper=20 cooling plenum can see different pressures, thus different atomization=20 effects.  Anyway, run the lean test and report back.
 
Grayhawk
 
In a message dated 11/16/2008 5:02:10 P.M. Central Standard Time,=20 dudewanarace@yahoo.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I have=20 been chasing a problem with my EGT's and have hit a wall.  My #3 EGT=20= is=20 about 80 degrees above the rest of the cylinders.  It also has the=20 highest CHT, but only by 10 degrees over #4.  Yet #4 has one of the=20 coolest EGT's...  #2 is the first to peak while leaning.

So ho= w=20 many gallons did Jimmy have left in his bucket after Jane....  =20= Just=20 kidding.  Sounded like a math quiz.

A better way to explain it= ,=20 see graph below.

http://www.n54sg.com/images/egt.jpg


I h= ave=20 done everything I know to do and can't seem to figure it out.  I have= =20 switched injectors from #4 and #3 thinking the injector may have been the=20 problem.  Didn't seem to change anything.  I have done my best t= o=20 check for a leak in the intake system.  Couldn't find anything. = =20

Attached is the data that goes with the graph.
It is a Superior= =20 XP-400SRE prototype so I don't exactly have anything to base my data on.&n= bsp;=20

Anybody have any ideas?
Tom=20 McNerney
www.N54SG.com

--
For archives and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html



-------------------------------1226883593--