X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Wed, 31 Jan 2007 10:43:32 -0500 Message-ID: X-Original-Return-Path: Received: from ms-smtp-02.texas.rr.com ([24.93.47.41] verified) by logan.com (CommuniGate Pro SMTP 5.1.5) with ESMTP id 1801463 for lml@lancaironline.net; Wed, 31 Jan 2007 08:45:24 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.93.47.41; envelope-from=toucan@Satx.rr.com Received: from VAIO (cpe-24-243-1-103.satx.res.rr.com [24.243.1.103]) by ms-smtp-02.texas.rr.com (8.13.6/8.13.6) with SMTP id l0VDiTsd012659 for ; Wed, 31 Jan 2007 07:44:29 -0600 (CST) X-Original-Message-ID: <001201c7453d$eb3a8130$6701f318@VAIO> From: "James Cameron" X-Original-To: "Lancair Mailing List" Subject: Boost pump X-Original-Date: Wed, 31 Jan 2007 07:44:23 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01C7450B.A02B5660" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000F_01C7450B.A02B5660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've flown behind three IO-550's in Lancairs now (2 ES's and 1 = Legacy) and have never had to use the boost pump for anything except = priming for starts. As far as I can see, turning the low boost on at = over 10,000 feet does nothing but make the engine run richer, which you = have to fix by backing off the mix. I've had these engines to density = altitude of 19K with no sign of vapor problems, and no need for boost. = Go figure. Jim Cameron Legacy N132X reserved ------=_NextPart_000_000F_01C7450B.A02B5660 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    I've flown behind three IO-550's = in=20 Lancairs now (2 ES's and 1 Legacy) and have never had to use the boost = pump for=20 anything except priming for starts.  As far as I can see, turning = the low=20 boost on at over 10,000 feet does nothing but make the engine run = richer, which=20 you have to fix by backing off the mix.  I've had these engines to = density=20 altitude of 19K with no sign of vapor problems, and no need for = boost.  Go=20 figure.
 
Jim Cameron
Legacy N132X reserved
 
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