X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 17 Jul 2010 14:40:38 -0400 Message-ID: X-Original-Return-Path: Received: from [69.84.129.240] (HELO asp.reflexion.net) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTPS id 4396520 for lml@lancaironline.net; Sat, 17 Jul 2010 11:37:55 -0400 Received-SPF: none receiver=logan.com; client-ip=69.84.129.240; envelope-from=cberland@systems3.net Received: (qmail 29185 invoked from network); 17 Jul 2010 15:37:18 -0000 Received: from unknown (HELO mail-cs-02.app.dcb.reflexion.net) (10.84.19.2) by 0 (rfx-qmail) with SMTP; 17 Jul 2010 15:37:18 -0000 Received: by mail-cs-02.app.dcb.reflexion.net (Reflexion email security v6.20.4) with SMTP; Sat, 17 Jul 2010 11:37:18 -0400 (EDT) Received: (qmail 7454 invoked from network); 17 Jul 2010 15:37:18 -0000 Received: from unknown (HELO remote.systems3.net) (98.172.79.178) by 0 (rfx-qmail) with (AES128-SHA encrypted) SMTP; 17 Jul 2010 15:37:18 -0000 Received: from S3SBS08SERVER.Systems3.local ([fe80::6077:364b:fa39:c71b]) by S3SBS08SERVER.Systems3.local ([fe80::6077:364b:fa39:c71b%10]) with mapi; Sat, 17 Jul 2010 08:37:16 -0700 From: Craig Berland. X-Original-To: Lancair Mailing List X-Original-Date: Sat, 17 Jul 2010 08:37:17 -0700 Subject: [LML] Re: My airplane is running HOT Thread-Topic: [LML] Re: My airplane is running HOT Thread-Index: AcslXyCnmfZ/8R1LRFKMgtz/2f//iwAYzawQ X-Original-Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_D7A6B5700A0803448C27264F1F53873648D1BEBA58S3SBS08SERVER_" MIME-Version: 1.0 --_000_D7A6B5700A0803448C27264F1F53873648D1BEBA58S3SBS08SERVER_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Bryan, not enough fuel will do exactly what you describe. If your EGT's are= in the low 1200's then fuel rate is NOT likely your problem. Just to put t= he affect of fuel rate into perspective. I live in Arizona and the OAT was= 110 degF a few weeks ago when this happened. 2500 RPM and 30 inHG (turbo n= ormalized). I was at low altitude and low airspeed as I was over the top of= my airport, circling to land. I inadvertently set fuel mixture in the "ma= x power/ max temp" range. In 54 seconds my CHT's went from 380 to 408 deg = F. I caught the JPI flashing at me and immediately went full rich. 48 sec= onds later my CHT's were at 380 degF. (From JPI download data) Oil temp wi= ll follow CHT. A bad oil cooler will also cause this problem as the oil pro= vides a significant part of your metal cooling. Craig Berland Anybody have any ideas or advice for the following situation: Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about. Chrome Cylinders. I have a Plenum cooling system and larger cowling inlets. (Zavatson's cowling and plenum system) Oil cooler is mounted at the front inlet. Oil wont cool in climb and will go up to 230 and probably higher if not stabilized. CHT's are all hot in climbs and will go to 440 no problem. Can= t figure it out. Motor runs great, compression good, boroscoped fine, mag timing good. All leaks in plenum or baffling are sealed. Probes were checked out ok. Only thing I haven't checked is the vernotherm. Thanks for any advice. Bryan --_000_D7A6B5700A0803448C27264F1F53873648D1BEBA58S3SBS08SERVER_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Bryan, not enough fuel wil= l do exactly what you describe. If your EGT’s are in the low 1200’s = then fuel rate is NOT likely your problem. Just to put the affect of fuel rate i= nto perspective.  I live in Arizona and the OAT was 110 degF a few weeks ago when this happen= ed. 2500 RPM and 30 inHG (turbo normalized). I was at low altitude and low airspeed = as I was over the top of my airport, circling to land.  I inadvertently set fuel mixture in the “max power/ max temp” range.  In 54 seconds my CHT’s went from 380 to 408 deg F.  I caught the JPI flashing at me and immediately went full rich.  48 seconds later my CH= T’s were at 380 degF.  (From JPI download data) Oil temp will follow CHT. = A bad oil cooler will also cause this problem as the oil provides a significa= nt part of your metal cooling.

Craig Berland


 Anybody have any ideas or advice for the following situation:
 
 Lancair 360 with carbed 360 (180hp) engine. 475 hours on it about. Ch= rome
 Cylinders. I have a Plenum cooling system and larger cowling inlets.<= br>  (Zavatson's cowling and plenum system)
 Oil cooler is mounted at the front inlet.
 Oil wont cool in climb and will go up to 230 and probably higher if n= ot
 stabilized. CHT's are all hot in climbs and will go to 440 no problem= . Cant
 figure it out.
 Motor runs great, compression good, boroscoped fine, mag timing good.= All
 leaks in plenum or baffling are sealed.
 Probes were checked out ok.
 
 Only thing I haven't checked is the vernotherm.
 
 Thanks for any advice.
 Bryan


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