X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 20 Jul 2014 17:03:12 -0400 Message-ID: X-Original-Return-Path: Received: from lennier.cc.vt.edu ([198.82.162.213] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6990307 for lml@lancaironline.net; Sun, 20 Jul 2014 16:07:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=198.82.162.213; envelope-from=jwilless@vt.edu Received: from mr4.cc.vt.edu (mr4.cc.vt.edu [198.82.164.236]) by lennier.cc.vt.edu (8.13.8/8.13.8) with ESMTP id s6KK6HIT013907 for ; Sun, 20 Jul 2014 16:06:25 -0400 Received: from mail-we0-f169.google.com (mail-we0-f169.google.com [74.125.82.169]) by mr4.cc.vt.edu (8.14.4/8.14.4) with ESMTP id s6KK5m6I024253 for ; Sun, 20 Jul 2014 16:06:03 -0400 Received: by mail-we0-f169.google.com with SMTP id u56so6704471wes.28 for ; Sun, 20 Jul 2014 13:05:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:date:message-id:subject:from :to:content-type; bh=UYgaSJjFwGhORDUQk2seTgiBjM0lrXkscqR1vJgxy0o=; b=IeZg1m5K7UqCoFA91CzlPJx8cSbgHQyGkT9ItP0zEw6YMB6zQtb+BlSH3TvVCqC9jO E7uvdZwGksVSpMzGSnqPQDybY1LBISTn5ErKMqEt5jIeH9mNp6kFCF0w4wizR6kY08FO DRLuTbtZDEp/LIhzKvoUAzmbCafYohVWcnc6p/zItZuYp75X96PLPq1WGWnfL2tB6eUu iyKLMN6wjasppd6/CvFv3902pRXNz867wJoEvPHqg0jVN/Y+V/LifJmT1/1Ee7wXcHQP MAWuol5/RjFi0Hem6JLbtvYlVXAmV0gcFnyfHQqBvaKPQUgLTCdxShxoKk9v+SlDOp/O mQxQ== X-Gm-Message-State: ALoCoQmPnaXemGQleAUZKAfZBK9VE1UudoFctqhCdqhhkxwdG9iPUL+HuaAQ710T9ksFWilnEaK+pJ21noRfoN5+lhWtbzzohbAOmQr3lZ52eaZj8coHiEEXQ9O3SpOQqGJGL68G76Or X-Received: by 10.194.63.37 with SMTP id d5mr16187200wjs.92.1405886747586; Sun, 20 Jul 2014 13:05:47 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.194.63.37 with SMTP id d5mr16187169wjs.92.1405886747381; Sun, 20 Jul 2014 13:05:47 -0700 (PDT) X-Original-Sender: jwilless@vt.edu Received: by 10.216.206.70 with HTTP; Sun, 20 Jul 2014 13:05:47 -0700 (PDT) X-Original-Date: Sun, 20 Jul 2014 16:05:47 -0400 X-Google-Sender-Auth: _7B98YHNhTeVENjJr34Ek5LFXx0 X-Original-Message-ID: Subject: Cold Cylinder From: "jwilless@itd-nc.com" X-Original-To: lml@lancaironline.net Content-Type: multipart/alternative; boundary=047d7ba979cc2c20b104fea58466 X-Spam-Status: No, score=-0.7 required=5.0 tests=HTML_MESSAGE, RCVD_IN_DNSWL_LOW autolearn=disabled version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mr4.cc.vt.edu --047d7ba979cc2c20b104fea58466 Content-Type: text/plain; charset=UTF-8 I have a Lancair ESP with a TSIO-550. Engine is very rough and low on power with #3 cylinder cold (100 degrees or more) on cht and egt while ROP. In cruise everything returns to normal if I go LOP. The injector o-rings looked okay when I inspected them. I sprayed the nozzle out pretty good with brake cleaner and shot a good amount of fuel out the spider and line. The injector is clean. Cylinder #3 acts normal at idle and run up. At full takeoff power the engine stumbles as #3 goes cold. I've already done a visual inspection of all the clamps and couplings and conducted a soapy water soapy water test of the intake system. There is a definite correlation between RPM and #3 going cold. Under about 2450 rpm ROP, #3 was smooth but a good 70 degrees colder than usual. When switching to LOP, #3 CHT comes right up in line with the other cylinders as normal and I can increase the rpm. When #3 get's rough, egt drops lock a rock. I tried using the high pressure fuel boost and modulating the flow with the mixture for a full rich condition but #3 stayed pretty cold. Mags checked out in all phases ROP and LOP. The #3 valves looked good with the scope and the compression was 72/80. The top plug looked a bit oily when I pulled it. Data can be viewed here. https://www.savvyanalysis.com/my-flights/3672/62353853-578e-410b-970e-c4da485c2e0b -- Thanks, Justin --047d7ba979cc2c20b104fea58466 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I have a Lancair ESP with a TSIO-550. Engine is very roug= h and low on power with #3 cylinder cold (100 degrees or more) on cht and e= gt while ROP. In cruise everything returns to normal if I go LOP.=C2=A0

The injector o-rings= looked okay when I inspected them. I sprayed the nozzle out pretty good wi= th brake cleaner and shot a good amount of fuel out the spider and line. Th= e injector is clean.
=
Cylinder #3 acts normal at idle and run up. At full takeoff power= the engine stumbles as #3 goes cold.=C2=A0
=
I've already done a visual inspection of all the clamps and c= ouplings and conducted a soapy water soapy water test of the intake system.=
=
There is a definite correlation between RPM and #3 going cold. Un= der about 2450 rpm ROP, #3 was smooth but a good 70 degrees colder than usu= al. When switching to LOP, #3 CHT comes right up in line with the other cyl= inders as normal and I can increase the rpm. When #3 get's rough, egt d= rops lock a rock.=C2=A0
=
I tried using the high pressure fuel boost and modulating the flo= w with the mixture for a full rich condition but #3 stayed pretty cold.=C2= =A0
=
Mags checked out in all phases ROP and LOP.=C2=A0

The #3 valves looked good with the scope and the compression was = 72/80. The top plug looked a bit oily when I pulled it.=C2=A0

Data can be viewed here.=C2=A0

<= a href=3D"https://www.savvyanalysis.com/my-flights/3672/62353853-578e-410b-= 970e-c4da485c2e0b">https://www.savvyanalysis.com/my-flights/3672/62353853-5= 78e-410b-970e-c4da485c2e0b

--

Thanks, Justin=C2=A0

--047d7ba979cc2c20b104fea58466--