X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 05 Nov 2012 11:37:34 -0500 Message-ID: X-Original-Return-Path: Received: from [198.64.152.110] (HELO sdc.com) by logan.com (CommuniGate Pro SMTP 6.0c2) with ESMTP id 5853523 for lml@lancaironline.net; Fri, 02 Nov 2012 08:28:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=198.64.152.110; envelope-from=ronald@sdc.com Received: from [192.168.0.5] [68.202.61.147] by sdc.com with ESMTP (SMTPD-12.1.0.270) id 4cde00090d39f323; Fri, 2 Nov 2012 08:25:34 -0400 From: Ronald Stevens Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-1--110102641 Subject: Re: [LML] Why is my fuel burn so high in my IV ???? X-Original-Date: Fri, 2 Nov 2012 08:27:31 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <28F1786A-4259-4AC1-AD31-F09831144D8F@sdc.com> X-Mailer: Apple Mail (2.1085) --Apple-Mail-1--110102641 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii You are on the rich side and never pulled it enough on too the lean = side. If you like to test how, just set your MAP to 26, and pull = slowly,you will see it peak (EGT) and then drop off (at low power be at = least 30 degrees LOP, at higher power (like 80%) at least 100 LOP. This = will give you some margins, as you will see changing altitudes sometimes = changes the power settings. (depending on your setup). At this power setting you can pull it back until you are getting 16gph, = check TIT (under 1600 is a good start so you have a margin), if the = engine starts to feel rough, add a little, if still rough then do a = gammi test (google this), and check if your fuel flow differences are = less then 0.5gph, if not, order Gami injectors,best investment for your = engine, and at the end WAY more economical :) There was a nice article not long ago about this where it showed that it = is better to use a higher power setting running LOP then lower power = setting running it ROP (it will keep your cylinders way cleaner). And = 270HP LOP or 270HP ROP will give you the same speed :)~ Now I think I remember that Charlie Kohler did had a TSIO550B so if you = like to have some additional training, then I definitely would recommend = Charlie, not only he knows how to run and baby your engine, he is a = great resource, and can teach you many things about this plane. =3D=3D Ronald =20 On Nov 2, 2012, at 7:50 AM, Guy and Jill Foreman wrote: > Reading some of the posts on the LML about IV/IVP drivers. Just = wondering how they are getting around 18-19 GPH at cruze power? > =20 > I have a straight IV with a TSIO-550-B. I usually fly around 10K feet, = using 28in MAP, 2400 RPM, Leaning to 1550 TIT, and getting 21.5 GPH fuel = burn. > =20 > What am I doing wrong? How is everyone else getting there fuel flow so = much lower? > =20 > Any advice would be much appreciated. > =20 > Thanks, > Guy Foreman --Apple-Mail-1--110102641 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii You are on the rich side and never pulled it enough = on too the lean side. If you like to test how, just set your MAP to 26, = and pull slowly,you will see it peak (EGT) and then drop off (at low = power be at least 30 degrees LOP, at higher power (like 80%) at least = 100 LOP. This will give you some margins, as you will see changing = altitudes sometimes changes the power settings. (depending on your = setup).

At this power setting you can pull it back = until you are getting 16gph, check TIT (under 1600 is a good start so = you have a margin), if the engine starts to feel rough, add a little, if = still rough then do a gammi test (google this), and check if your fuel = flow differences are less then 0.5gph, if not, order Gami injectors,best = investment for your engine, and at the end WAY more economical = :)

There was a nice article not long ago about = this where it showed that it is better to use a higher power setting = running LOP then lower power setting running it ROP (it will keep your = cylinders way cleaner). And 270HP LOP or 270HP ROP will give you the = same speed :)~

Now I think I remember that = Charlie Kohler did had a TSIO550B so if you like to have some additional = training, then I definitely would recommend Charlie, not only he knows = how to run and baby your engine, he is a great resource, and can teach = you many things about this plane.

=3D=3D = Ronald

On Nov = 2, 2012, at 7:50 AM, Guy and Jill Foreman wrote:

Reading some of the posts on the LML about IV/IVP = drivers. Just wondering how they are getting around 18-19 GPH at = cruze power?

I have a straight IV with a TSIO-550-B. I = usually fly around 10K feet, using 28in MAP, 2400 RPM, Leaning to 1550 = TIT, and getting 21.5 GPH fuel burn.

What am I doing wrong? = How is everyone else getting there fuel flow so much = lower?

Any advice would be much = appreciated.

Thanks,
Guy = Foreman

= --Apple-Mail-1--110102641--