X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 07 Aug 2014 16:18:05 -0400 Message-ID: X-Original-Return-Path: Received: from homiemail-a92.g.dreamhost.com ([208.113.200.129] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 7082812 for lml@lancaironline.net; Thu, 07 Aug 2014 11:38:39 -0400 Received-SPF: none receiver=logan.com; client-ip=208.113.200.129; envelope-from=r.rickard@rcginc-us.com Received: from homiemail-a92.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a92.g.dreamhost.com (Postfix) with ESMTP id 607CC3DC06E for ; Thu, 7 Aug 2014 08:38:04 -0700 (PDT) Received: from [192.168.200.74] (24-107-84-134.dhcp.stls.mo.charter.com [24.107.84.134]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: r.rickard@rcginc-us.com) by homiemail-a92.g.dreamhost.com (Postfix) with ESMTPSA id 029123DC05E for ; Thu, 7 Aug 2014 08:38:03 -0700 (PDT) From: Bob Rickard Content-Type: multipart/alternative; boundary="Apple-Mail=_F74D8CBA-FE30-4A3E-8737-4690B952EB8C" X-Original-Message-Id: Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [LML] High CHTs on #2, TSIO 550 X-Original-Date: Thu, 7 Aug 2014 10:38:02 -0500 References: X-Original-To: Lancair Mailing List In-Reply-To: X-Mailer: Apple Mail (2.1878.6) --Apple-Mail=_F74D8CBA-FE30-4A3E-8737-4690B952EB8C Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 I agree with Colyn, I climb at 145 even in the summer and CHT=92s stay below 380 - without = exhaust tunnel extensions. I find that fuel flow at WOT set at 45-47gph = helps a lot. Bob R On Aug 7, 2014, at 8:21 AM, Colyn Case wrote: > 140 is Vy. It can work fine (CHT 380 or less) if your engine, = baffles, fuel flow etc. are set up correctly, and you have the exhaust = tunnel extensions. 11 minutes to FL200 @43gph will use 7.8 gallons of = fuel. >=20 > On Aug 7, 2014, at 7:28 AM, John B wrote: >=20 > I think 140 on the climb is very slow, Tom. I suggest you set your = climb speed at 165. That should still allow 1500 to 1800 fpm vertical at = least to about FL 180. The bonus is that CHT should be a lot cooler. >=20 > John >=20 > Sent from my iPad >=20 >=20 >> On Aug 6, 2014, at 1:19 PM, Thomas Whalen = wrote: >>=20 >> I have been fighting for over a year to try to keep the #2 CHT below = 400 dg on the climb. It has hit as high as 430. I leave it full rich and = climb at 140kts. When I level off, I then LOP and then #1 cools off. I = have the Lancair baffles and RTV the gaps with the engine and have a = good baffle seal. I even covered my 3rd intercooler and that only helped = a little. Behind the prop the baffle seals up to the top cowl but not = down to the bottom. I have seen it the reverse of that as well. If close = the oil cooler door the CHT will drop 5dg at times.=20 >> This was a factory new engine.=20 >> Any suggestions? >>=20 >> Thomas Whalen >> N444TW >> -- >> For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html >>=20 >=20 > -- > For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html >=20 >=20 > -- > For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html --Apple-Mail=_F74D8CBA-FE30-4A3E-8737-4690B952EB8C Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 I = agree with Colyn,

I climb at 145 even in the summer = and CHT=92s stay below 380 - without exhaust tunnel extensions.  I = find that fuel flow at WOT set at 45-47gph helps a = lot.

Bob R




On Aug 7, 2014, at 8:21 AM, Colyn Case <colyncase@earthlink.net> = wrote:

140 is Vy.   It can work fine (CHT 380 or less) = if your engine, baffles, fuel flow etc. are set up correctly, and you = have the exhaust tunnel extensions. 11 minutes to FL200 @43gph will use = 7.8 gallons of fuel.

On Aug 7, 2014, at 7:28 AM, John B = wrote:

I think 140 on the climb is very slow, Tom. I suggest you = set your climb speed at 165. That should still allow 1500 to 1800 fpm = vertical at least to about FL 180.  The bonus is that CHT should be = a lot cooler.

John

Sent from my = iPad


On Aug 6, 2014, at 1:19 PM, = Thomas Whalen <thomasjwhalen@att.net> = wrote:

I have been fighting for over a year to try to keep the #2 = CHT below 400 dg on the climb. It has hit as high as 430. I leave it = full rich and climb at 140kts. When I level off, I then LOP and then #1 = cools off. I have the Lancair baffles and RTV the gaps with the engine = and have a good baffle seal. I even covered my 3rd intercooler and that = only helped a little. Behind the prop the baffle seals up to the top = cowl but not down to the bottom. I have seen it the reverse of that as = well. If close the oil cooler door the CHT will drop 5dg at times. =
This was a factory new engine.
Any suggestions?

Thomas = Whalen
N444TW
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