X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 07 Mar 2009 20:33:38 -0500 Message-ID: X-Original-Return-Path: Received: from blu0-omc3-s9.blu0.hotmail.com ([65.55.116.84] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3531754 for lml@lancaironline.net; Sat, 07 Mar 2009 12:06:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.116.84; envelope-from=gary21sn@hotmail.com Received: from BLU130-DS3 ([65.55.116.72]) by blu0-omc3-s9.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sat, 7 Mar 2009 09:05:29 -0800 X-Originating-IP: [68.186.114.52] X-Originating-Email: [gary21sn@hotmail.com] X-Original-Message-ID: X-Original-Return-Path: gary21sn@hotmail.com From: "Gary Edwards" X-Original-To: "Lancair Mailing List" References: Subject: Re: oil cooling X-Original-Date: Sat, 7 Mar 2009 09:05:23 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_04F4_01C99F03.DA292E60" In-Reply-To: X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.60.0053.2200 Seal-Send-Time: Sat, 7 Mar 2009 09:05:23 -0800 X-OriginalArrivalTime: 07 Mar 2009 17:05:29.0160 (UTC) FILETIME=[EABDBC80:01C99F46] This is a multi-part message in MIME format. ------=_NextPart_000_04F4_01C99F03.DA292E60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It seems that most temp issues are with oil. Mine are not with oil, but = with CHT's. As you know (you have seen pictures), I have 2 smaller (6" round) oil = coolers, one on each side (mounted to the engine mount) with naca ducts = and short 4" to 6" long straight 2" inch scat duct to them. The scat = duct is connected via glass enlargers. On the outlet side, there are = glass reducers down to 4" scat duct, with the duct routed down to near = the nose gear front cover on the firewall. It as close to the lower = cowl outlet area that I could get. The oil temps. are too low, especially in winter. It is difficult to = get the temp to 180. In summer, the oil temp is about 190 to 200 climb = and cruise. I tried (for winter) closing off one cooler with duct tape = over the cowl inlet to raise the temp and it didn't make any difference. = Tried it on both sides. I also removed the 4" outlet duct (reducers = left on), to let the outlet flow directly into the rear cowl area, with = no change noticed. In only one case, have I had a high oil temp; in = Bend, Or., giving a friend a ride after a previous flight. Outside temp = in the '70's. Never has happened again. Now, if I could just get my CHT's down. I have to step climb with that = issue when at gross weight. Gary Edwards LNC2 235/320 =20 ----- Original Message -----=20 From: randy snarr=20 To: lml@lancaironline.net=20 Sent: Friday, March 06, 2009 4:53 PM Subject: [LML] oil cooling All, I am looking for suggestions on how to lower my oil temps. I am = running an IO 320 on the original 235 frame. On warm days in a climb I = have trouble keeping them below 220. I usually have to flatten out the = climb to cool things down if they get up to 230 or so. Once in cruise it = is not a problem and they will settle around 210. I would like to get = them down to 190 if possible. The problem is on a 75 plus degree day = when the airplane is already warm from flying and I need to go again. I = am picking up outside air on a naca vent on the left side of the cowl. = There is a 6" length scat tube (4"diameter) connecting the cowl inlet to = a glass expansion section that is connected to the cooler.(see pics). It = just dumps in the lower cowl area. I am running a Stewart Warner oil cooler that many have had = success with. I have tried larger hoses to the cooler now using -8's and also = removed the 90 deg fittings I used to have to improve flow. I suspect my ducting and or connection to the cooler could be = improved. I am looking for suggestions that could be done without = cutting the cowl. Thanks in advance! Randy L.Snarr=20 ------=_NextPart_000_04F4_01C99F03.DA292E60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
It seems that most temp issues are with oil.  Mine are not = with oil,=20 but with CHT's.
 
As you know (you have seen pictures), I have 2 smaller (6" round) = oil=20 coolers, one on each side (mounted to the engine mount) with naca ducts = and=20 short 4" to 6" long straight 2" inch scat duct to them.  The scat = duct is=20 connected via glass enlargers.  On the outlet side, there are = glass=20 reducers down to 4" scat duct, with the duct routed down to near the = nose gear=20 front cover on the firewall.  It as close to the lower cowl = outlet=20 area that I could get.
 
The oil temps. are too low, especially in winter.  It is = difficult to=20 get the temp to 180.  In summer, the oil temp is about 190 to 200 = climb and=20 cruise.  I tried (for winter) closing off one cooler with duct tape = over=20 the cowl inlet to raise the temp and it didn't make any = difference.  Tried=20 it on both sides.  I also removed the 4" outlet duct (reducers left = on), to=20 let the outlet flow directly into the rear cowl area, with no change=20 noticed.  In only one case, have I had a high oil temp; in Bend,=20 Or., giving a friend a ride after a previous flight.  Outside=20 temp in the '70's.  Never has happened again.
 
Now, if I could just get my CHT's down.  I have to step climb = with=20 that issue when at gross weight.
 
Gary Edwards
LNC2 235/320   
----- Original Message -----
From: randy=20 snarr
Sent: Friday, March 06, 2009 = 4:53=20 PM
Subject: [LML] oil = cooling

All,
I am looking for suggestions on = how to=20 lower my oil temps. I am running an IO 320 on the original 235 = frame. On=20 warm days in a climb I have trouble keeping them below 220. I = usually=20 have to flatten out the climb to cool things down if they get up = to 230=20 or so. Once in cruise it is not a problem and they will settle = around=20 210. I would like to get them down to 190 if possible. The = problem is on=20 a 75 plus degree day when the airplane is already warm from = flying and I=20 need to go again. I am picking up outside air on a naca vent on = the left=20 side of the cowl. There is a 6" length scat tube (4"diameter) = connecting=20 the cowl inlet to a glass expansion section that is connected to = the=20 cooler.(see pics). It just dumps in the lower cowl area.
I am = running=20 a Stewart Warner oil cooler that many have had success = with.

I=20 have tried larger hoses to the cooler now using -8's and also = removed=20 the 90 deg fittings I used to have to improve flow.
I suspect = my=20 ducting and or connection to the cooler could be improved. I am = looking=20 for suggestions that could be done without cutting the=20 cowl.

Thanks in advance!

Randy=20 = L.Snarr

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