X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 16 Jul 2007 12:53:29 -0400 Message-ID: X-Original-Return-Path: Received: from mta16.adelphia.net ([68.168.78.211] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2180237 for lml@lancaironline.net; Mon, 16 Jul 2007 08:36:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=68.168.78.211; envelope-from=glcasey@adelphia.net Received: from [75.82.253.35] by mta16.adelphia.net (InterMail vM.6.01.05.04 201-2131-123-105-20051025) with ESMTP id <20070716123523.WPOV5501.mta16.adelphia.net@[75.82.253.35]> for ; Mon, 16 Jul 2007 08:35:23 -0400 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-4-123691861 X-Original-Message-Id: From: Gary Casey Subject: Re: L360 Fuel pressure X-Original-Date: Mon, 16 Jul 2007 05:35:21 -0700 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.2) --Apple-Mail-4-123691861 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed In contrast to the Continental system, the Lycoming (Precision Airmotive, a.k.a. Bendix) system only needs enough pressure to supply the fuel - the pressure level has no influence on the fuel flow rate. The system needs something over 11 psi to operate, and 15 is more than enough. There is usually no reason to turn on the electric pump unless fuel flow is interrupted. I think your system is behaving normally. Gary Casey > > What fuel pressure range should I be seeing for a Lycoming IO-360 > in a Lancair 360 (N360DE)? > > > > The fuel pressure is indicating between 16 and 18 without the boost > pump on. When I go to altitudes above 6,000 feet, the fuel > pressure drops a pound or two so I turn on the boost pump. With > the boost pump on fuel pressure in indicated between 18 and 20 PSI. > > Randy Hartman --Apple-Mail-4-123691861 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 In contrast to the Continental = system, the Lycoming (Precision Airmotive, a.k.a. Bendix) system only = needs enough pressure to supply the fuel - the pressure level has no = influence on the fuel flow rate.=A0 The system needs something over 11 = psi to operate, and 15 is more than enough.=A0 There is usually no = reason to turn on the electric pump unless fuel flow is interrupted.=A0 = I think your system is behaving normally.

Gary = Casey

What fuel = pressure range should I be seeing for a Lycoming IO-360 in a Lancair 360 = (N360DE)?
=A0=
=
The fuel = pressure is indicating between 16 and 18 without the boost pump on. = =A0When I go to altitudes above 6,000 feet, the fuel pressure drops a = pound or two so I turn on the boost pump. =A0With the boost pump on fuel = pressure in indicated between 18 and 20 PSI.
Randy = Hartman

= --Apple-Mail-4-123691861--