X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 16 Jul 2007 07:03:55 -0400 Message-ID: X-Original-Return-Path: Received: from colossus.formysite.com ([64.58.34.10] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTPS id 2179707 for lml@lancaironline.net; Sun, 15 Jul 2007 23:47:21 -0400 Received-SPF: none receiver=logan.com; client-ip=64.58.34.10; envelope-from=genemartin@enid.com Received: from yolanda ([66.138.13.85]) by colossus.formysite.com (8.12.8/8.12.8) with SMTP id l6G3kgaJ002015 for ; Sun, 15 Jul 2007 22:46:42 -0500 X-Original-Message-ID: <003601c7c75b$f15688c0$0a01a8c0@yolanda> Reply-To: "Gene Martin" From: "Gene Martin" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] L360 Fuel pressure X-Original-Date: Sun, 15 Jul 2007 22:46:15 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0031_01C7C731.F3507610" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0031_01C7C731.F3507610 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable should be 20psi + mine runs at 26psi and 28psi on the boost pump. = spruce cat. shows the pumps rated at 25 to 30psi. the mods made to your = servo should have no effect. Gene Martin LNC2/320 ----- Original Message -----=20 From: Randy L. Hartman, Jr.=20 To: lml@lancaironline.net=20 Sent: Sunday, July 15, 2007 7:29 PM Subject: [LML] L360 Fuel pressure What fuel pressure range should I be seeing for a Lycoming IO-360 in a = Lancair 360 (N360DE)? =20 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. =20 What is interesting is that the VM 1000 (where Fuel Pressure is = indicated) has a red arc section, a yellow arc section, and a green arc = section. At the fuel pressures I am seeing; 16 PSI is in the top end of = the yellow arc, so 17 to 20 PSI appears in the lower range of the green = arc - giving us the feeling that we are on the ragged edge of not having = proper fuel pressure for normal operation. =20 The VM-1000 can be calibrated so that the proper fuel pressure = indicates more properly in the green arc - if this is proper. =20 Information that may be important to know: =20 IO-360 Model =3D Started life as O-360-C2A and converted to an IO-360 = - S/N L-21393-36A =20 Fuel pressure is taken after the mechanical pump, 1 foot before the = fuel servo on a tee fitting. =20 Fuel system/model/etc. =3D Bendix, model RSA 5AD1, parts list = 2524213-10 less issues -11, S/N 9354/10 =20 Have any components (fuel pump, servo, flow-divider, nozzles, etc.) = been modified? =3D Fuel servo mod: there was a mod made to the servo = fuel injector to reverse the actuation of the butterfly valve and the = fuel-metering valve. When the throttle arm was rotated full forward; = this was the idle position of the butterfly valve and the fuel-metering = valve. We had this reversed so that full forward position resulted in = full throttle. No other mods. =20 What type mechanical (engine-driven) fuel pump (diaphragm or rotary)? = =3D Diaphragm =20 Thanks in advance. =20 Randy Hartman =20 ------=_NextPart_000_0031_01C7C731.F3507610 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

should be 20psi + mine runs at = 26psi and=20 28psi on the boost pump. spruce cat. shows the pumps rated at 25 = to 30psi.=20 the mods made to your servo should have no effect.

Gene Martin

LNC2/320

----- Original Message -----
From:=20 Randy=20 L. Hartman, Jr.
To: lml@lancaironline.net

Sent: Sunday, July 15, 2007 = 7:29 PM

Subject: [LML] L360 Fuel = pressure

What=20 fuel pressure range should I be seeing for a Lycoming IO-360 in a = Lancair 360=20 (N360DE)?

The=20 fuel pressure is indicating between 16 and 18 without the boost pump = on.=20 When I go to altitudes above 6,000 feet, the fuel pressure drops = a pound=20 or two so I turn on the boost pump. With the boost pump on fuel = pressure=20 in indicated between 18 and 20 PSI.

What is=20 interesting is that the VM 1000 (where Fuel Pressure is indicated) has = a red=20 arc section, a yellow arc section, and a green arc section. At = the fuel=20 pressures I am seeing; 16 PSI is in the top end of the yellow arc, so = 17 to 20=20 PSI appears in the lower range of the green arc =96 giving us the = feeling that=20 we are on the ragged edge of not having proper fuel pressure for = normal=20 operation.

The=20 VM-1000 can be calibrated so that the proper fuel pressure indicates = more=20 properly in the green arc =96 if this is = proper.

Information=20 that may be important to know:

IO-360=20 Model =3D = Started life as=20 O-360-C2A and converted to an IO-360 =96 S/N=20 L-21393-36A

Fuel=20 pressure is taken after the = mechanical=20 pump, 1 foot before the fuel servo on a tee=20 fitting.

Fuel=20 system/model/etc. =3D Bendix, = model RSA=20 5AD1, parts list 2524213-10 less issues -11, S/N=20 9354/10

Have=20 any components (fuel pump, servo, flow-divider, = nozzles, etc.)=20 been modified? =3D Fuel servo mod: there was a mod = made to the=20 servo fuel injector to reverse the actuation of the butterfly valve = and the=20 fuel-metering valve. When the throttle arm was rotated full = forward;=20 this was the idle position of the butterfly valve and the = fuel-metering valve.=20 We had this reversed so that full forward position resulted in = full=20 throttle.

No other=20 mods.

What type=20 mechanical (engine-driven) fuel pump (diaphragm or=20 rotary)? =3D=20 Diaphragm

Thanks in=20 advance.

Randy=20 Hartman

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