X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 15 Jul 2007 20:29:37 -0400 Message-ID: X-Original-Return-Path: Received: from mtao02.charter.net ([209.225.8.187] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2179416 for lml@lancaironline.net; Sun, 15 Jul 2007 19:46:33 -0400 Received-SPF: none receiver=logan.com; client-ip=209.225.8.187; envelope-from=rpharis@teamimc.com Received: from aa03.charter.net ([10.20.200.155]) by mtao02.charter.net (InterMail vM.7.08.02.00 201-2186-121-20061213) with ESMTP id <20070715234549.QBUM9370.mtao02.charter.net@aa03.charter.net> for ; Sun, 15 Jul 2007 19:45:49 -0400 Received: from ws1 ([71.84.14.37]) by aa03.charter.net with SMTP id <20070715234549.FIIX7864.aa03.charter.net@ws1> for ; Sun, 15 Jul 2007 19:45:49 -0400 From: "Rod Pharis" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Re: oil separator X-Original-Date: Sun, 15 Jul 2007 16:44:31 -0700 X-Original-Message-ID: <001001c7c73a$17b29a80$6401a8c0@ws1> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C7C6FF.6B563380" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1896 In-Reply-To: Importance: Normal X-Chzlrs: 0 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C7C6FF.6B563380 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Peter, Performance Engines now makes an aluminum 12-quart oil pan for the IO-550-EXP that would probably be quite happy at 10-quarts. They also make rocker covers machined out of an aluminum billet, that could easily be tapped, and perhaps if asked they could make some with a little extra thickness in one place and pre-drill and tap it for that purpose, assuming that in fact is a good location. Rod Pharis -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net]On Behalf Of PJHWFD@aol.com Sent: Saturday, July 14, 2007 5:03 PM To: lml@lancaironline.net Subject: [LML] Re: oil seperator Brad I have been going trough a lot of trouble shooting on my Legacy IO-550exp related to oil blowby. I have the Andair separator. My problems related to two issues. If you are blowing a lot of oil this system can be overwhelmed and if it fills to the outlet port. You will really start blowing oil because of back pressure. I originally plumbed into the accessory case for the drain back oil with poor results on long trips. Lancair recommended this but Continental, Airwolf, M20, Cirrus all say the only low pressure place to return oil is the rocker valve cover or push rod tube. The accessory case sees high crankcase pressures and has oil spraying onto the port. I also tried a remote collection cup sold by Andair which worked OK till it filled. I am now plumbed into the rocker valve cover with good results but do not have enough data on long flights to be sure. Many of these systems rely on pressure from a vacuum pump to aid siphoning back to the crankcase. Without that you have a little disadvantage and be sure there is good gravity feed back to the engine. Why am I loosing so much oil? I think oil levels play a very important part in this and would like to hear from others on their opinion. I originally ran at 6 quarts because the common wisdom was that anymore and it would just get blown out the breather. I am worried that anything less than 6 could cause cavitation and foaming in the oil pan and accelerate the oil blowby problem. Cirrus specifically recommends not letting the level drop below 6. Not a lot of fun watching oil pressures drop from 75 to 50 and getting out of the plane and having the belly smeared with oil. I am now running closer to 7 and hope this gives better results. My oil temps run near 180 and have never gone above 200 except during extended ground operation. I have the oil cooler door and tried removing it because I never used it but my oil temps were to low in the winter. Home base Vermont. Hope to visit with a lot of you at Oshkosh. Peter Hebert N23PH LEG2/G pjhwfd@aol.com ---------------------------------------------------------------------------- -- Get a sneak peak of the all-new AOL.com. ------=_NextPart_000_0011_01C7C6FF.6B563380 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Peter,
 
Performance Engines now makes an = aluminum=20 12-quart oil pan for the IO-550-EXP that would probably be quite happy = at=20 10-quarts.  They also make rocker covers machined out of an = aluminum=20 billet, that could easily be tapped, and perhaps if asked they = could=20 make some with a little extra thickness in one place and = pre-drill and=20 tap it for that purpose, assuming that in fact is a good = location.
 
Rod Pharis
-----Original Message-----
From: Lancair = Mailing List=20 [mailto:lml@lancaironline.net]On Behalf Of=20 PJHWFD@aol.com
Sent: Saturday, July 14, 2007 5:03=20 PM
To: lml@lancaironline.net
Subject: [LML] Re: = oil=20 seperator

Brad
I have been going trough a lot of trouble shooting on my Legacy=20 IO-550exp related to oil blowby. I have the Andair separator. My = problems=20 related to two issues.  If you are blowing a lot of oil this = system can=20 be overwhelmed and if it fills to the outlet port. You will really = start=20 blowing oil because of back pressure.  I originally plumbed into = the=20 accessory case for the drain back oil with poor results on long = trips. =20 Lancair recommended this but Continental, Airwolf, M20, Cirrus all say = the=20 only low pressure place to return oil is the rocker valve cover or = push rod=20 tube.  The accessory case sees high crankcase pressures and has = oil=20 spraying onto the port. I also tried a remote collection cup sold by = Andair=20 which worked OK till it filled. I am now plumbed into the rocker valve = cover=20 with good results but do not have enough data on long flights to be = sure. Many=20 of these systems rely on pressure from a vacuum pump to aid siphoning = back to=20 the crankcase.  Without that you have a little disadvantage and = be sure=20 there is good gravity feed back to the engine.    =
Why am I loosing so much oil?  I think oil levels play a = very=20 important part in this and would like to hear from others on their=20 opinion.  I originally ran at 6 quarts because the common wisdom = was that=20 anymore and it would just get blown out the breather. I am worried = that=20 anything less than 6 could cause cavitation and foaming in the oil pan = and=20 accelerate the oil blowby problem. Cirrus specifically recommends not = letting=20 the level drop below 6. Not a lot of fun watching oil pressures drop = from 75=20 to 50 and getting out of the plane and having the belly smeared with = oil. I am=20 now running closer to 7 and hope this gives better results.
My oil temps run near 180 and have never gone above 200 except = during=20 extended ground operation. I have the oil cooler door and tried = removing it=20 because I never used it but my oil temps were to low in the = winter.  Home=20 base Vermont.
Hope to visit with a lot of you at Oshkosh.
 
 
Peter=20 Hebert
N23PH LEG2/G
pjhwfd@aol.com



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