X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 05 Nov 2007 13:50:43 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-spurfowl.atl.sa.earthlink.net ([209.86.89.66] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2456714 for lml@lancaironline.net; Mon, 05 Nov 2007 12:37:16 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.66; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=Mvgvnq7GAuxxyRRj2pCGQDGFdx1ma1wARlYIf3Cx1lBXD3P6itc/Wyd4dSRzAymG; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.94] (helo=ccaselt2) by elasmtp-spurfowl.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1Ip5sL-0006m9-Tn for lml@lancaironline.net; Mon, 05 Nov 2007 12:36:38 -0500 X-Original-Message-ID: <196401c81fd2$67348eb0$0302a8c0@nvidia.com> From: "Colyn Case on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Speeds at Altitude X-Original-Date: Mon, 5 Nov 2007 12:36:30 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_1961_01C81FA8.7D9B0FA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940c9451030b3c2caeb7ace5bc34a4fc10c350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.94 This is a multi-part message in MIME format. ------=_NextPart_000_1961_01C81FA8.7D9B0FA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable You need 43-45 gph to do what Jeff suggests. + depending on your cowl you may need air guides over the exhaust = sections of the cylinders to keep the cooling air flow moving through = the fins + or exhaust tunnel extensions. 31/2500 inches COULD be worse than 38/2700 depending on mixture and = spark timing. Michael N. said, I use 2500 and 31 inches about 27 GPH. It was my understanding that = continuous operation at 38 inches was not recommended. I have not tried = to climb at that setup, it might run cooler. ------=_NextPart_000_1961_01C81FA8.7D9B0FA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

You need 43-45 gph to do what Jeff suggests.

+ depending on your cowl you may need air guides over the exhaust = sections=20 of the cylinders to keep the cooling air flow moving through the = fins

+ or exhaust tunnel extensions.

31/2500 inches COULD be worse than 38/2700 depending on mixture and = spark=20 timing.

Michael = N.=20 said,

I use = 2500 and 31=20 inches about 27 GPH. It was my understanding that = continuous=20 operation at 38 inches was not recommended. I have not tried to climb = at that=20 setup, it might run cooler.

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