X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 08 Mar 2006 00:55:44 -0500 Message-ID: X-Original-Return-Path: Received: from rwcrmhc11.comcast.net ([204.127.192.81] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1025372 for lml@lancaironline.net; Tue, 07 Mar 2006 04:30:37 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.192.81; envelope-from=mjrav@comcast.net Received: from mark1 (c-24-91-12-165.hsd1.ma.comcast.net[24.91.12.165]) by comcast.net (rwcrmhc11) with SMTP id <20060307092950m11009q96ee>; Tue, 7 Mar 2006 09:29:50 +0000 X-Original-Message-ID: <005c01c641ca$61e143f0$a50c5b18@mark1> From: "Mark Ravinski" X-Original-To: "Lancair Mailing List" Subject: Re: Boost pump location X-Original-Date: Tue, 7 Mar 2006 04:34:40 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0059_01C641A0.72B44F30" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1506 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 This is a multi-part message in MIME format. ------=_NextPart_000_0059_01C641A0.72B44F30 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable A while ago I reworked my fuel system in the course of chasing a = non-related engine problem. One test I did was to measure the gravity fuel flow rate at the = gascolator. With the gascolator valve open, fuel would drain from the = header tank at about 5 gal per hour. Now, this is only 1/4 of the full = throttle fuel flow and makes it obvious that wherever the first pump in = the system is - it has to suck fuel from the tank. I elected to mount the boost pump as close to the shutoff valve as I = could and it is at the top of the passenger foot well. Now it works fine for pumping fuel but it makes about as much noise as = the engine while on the ground. I find that I'm always reaching for the switch to kill the noise when = halfway through rollout. Low, and forward of the firewall is probably a better spot. Mark Ravinski N360KB 1365 hrs. ------=_NextPart_000_0059_01C641A0.72B44F30 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
A while ago I reworked my fuel system = in the course=20 of chasing a non-related engine problem.
One test I did was to measure the = gravity fuel flow=20 rate at the gascolator.  With the gascolator valve open, fuel would = drain=20 from the header tank at about 5 gal per hour.  Now, this is only = 1/4 of the=20 full throttle fuel flow and makes it obvious that wherever the first = pump in the=20 system is - it has to suck fuel from the tank.
I elected to mount the boost pump as = close to the=20 shutoff valve as I could and it is at the top of the passenger foot=20 well.
Now it works fine for pumping fuel but = it makes=20 about as much noise as the engine while on the ground.
I find that I'm always reaching for the = switch to=20 kill the noise when halfway through rollout.
Low, and forward of the firewall is = probably a=20 better spot.
 
Mark Ravinski
N360KB  1365 = hrs.
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