Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Thu, 31 Mar 2005 14:18:50 -0500 Message-ID: X-Original-Return-Path: Received: from systems3.net ([68.14.236.16] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP-TLS id 850231 for lml@lancaironline.net; Thu, 31 Mar 2005 13:38:48 -0500 Received-SPF: none receiver=logan.com; client-ip=68.14.236.16; envelope-from=cberland@systems3.net Received: from systems0d3b724 ([192.168.1.81]) by systems3.net (8.13.1/8.13.1/Debian-12) with SMTP id j2VIc283031397 for ; Thu, 31 Mar 2005 11:38:02 -0700 X-Original-Message-ID: <00cb01c5361f$cfdb29a0$5101a8c0@systems0d3b724> From: "Craig Berland" X-Original-To: "Lancair Mail List" Subject: [LML] Re: Alternative Engines X-Original-Date: Thu, 31 Mar 2005 11:31:05 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C8_01C535E5.20730940" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 X-Virus-Scanned: clamd / ClamAV version 0.75-1, clamav-milter version 0.75c on linux X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_00C8_01C535E5.20730940 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable "What is a decent oil temperature for take off. The viscosity changes = by roughly 2 orders of magnitude between start up and steady state = cruise. Is there some viscosity/temperature threshold that should be = observed to prevent damage at take off power? Also, is there a = particular reason for not mixing brands/viscosity? I tend to run multi = weight in the winter and straight weight the rest of the year(same = brand). There is obviously be some mixing during the change over. Chris = Zavatson" Decent oil temp for take off? Chris, I think it is important on this = site to say "I don't know" when it is so. Here's what I do know. In our = IMSA road race car we ran 50W oil for a while. We wanted the oil temp at = 150 deg F on the pace lap. This was impossible on cool days. The concern = is two-fold. One, oil to the valve train and two, oil to the connecting = rods at high (8500) RPM. The other concern is actually blowing up the = oil filter if oil pressure gets too high. I've seen this happen. This = obviously would be very bad on take off. I would think that over 100 deg = F should be OK with 50W oil, but I don't know for sure. The reason I = don't mix oil brands is due to its negative affect on oil consumption. = Changing from straight 50W to 20W50 is not nearly as big of a concern, = in my opinion. However my experience says you will get better oil = consumption while running the 50W oil as well as better lubrication and = therefore less engine wear. You know, I used to get in a big hurry = during run-up, I'm not sure why, just seemed like I should get the = engine back to idle. Now I do the run-up lean and let the engine warm up = a little...no big hurry. I know the question was, when do you pull the = throttle back and request clearance for departure...hope this helps. Craig Berland=20 ------=_NextPart_000_00C8_01C535E5.20730940 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

"What is a=20 decent oil temperature for take off. The viscosity changes by = roughly 2=20 orders of magnitude between start up and steady state cruise. Is = there=20 some viscosity/temperature threshold that should be observed to prevent = damage=20 at take off power? Also, is there a particular reason for not mixing=20 brands/viscosity? I tend to run multi weight in the winter and = straight=20 weight the rest of the year(same brand). There is obviously be = some mixing=20 during the change over. Chris Zavatson"

Decent oil temp=20 for take off? Chris, I think it is important on this site to say "I = don't know"=20 when it is so. Here's what I do know. In our IMSA road race car we ran = 50W oil=20 for a while. We wanted the oil temp at 150 deg F on the pace lap. = This was=20 impossible on cool days. The concern is two-fold. One, oil to the valve = train=20 and two, oil to the connecting rods at high (8500) RPM. The other = concern is=20 actually blowing up the oil filter if oil pressure gets too high. I've = seen this=20 happen. This obviously would be very bad on take off. I would think that = over=20 100 deg F should be OK with 50W oil, but I don't know for sure. The = reason I=20 don't mix oil brands is due to its negative affect on oil consumption. = Changing=20 from straight 50W to 20W50 is not nearly as big of a concern, in my = opinion. However my experience says you will get better oil consumption = while=20 running the 50W oil as well as better lubrication and therefore less = engine=20 wear. You know, I used to get in a big hurry during run-up, I'm not sure = why,=20 just seemed like I should get the engine back to idle. Now I do the = run-up lean=20 and let the engine warm up a little...no big hurry. I know the question = was,=20 when do you pull the throttle back and request clearance for = departure...hope=20 this helps.

Craig=20 Berland

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