X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmfepo201.cox.net ([68.230.241.146] verified) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4885305 for flyrotary@lancaironline.net; Mon, 28 Feb 2011 13:11:11 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.146; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmfepo201.cox.net (InterMail vM.8.01.04.00 201-2260-137-20101110) with ESMTP id <20110228181036.KSHF16474.fed1rmfepo201.cox.net@fed1rmimpo03.cox.net> for ; Mon, 28 Feb 2011 13:10:36 -0500 Received: from BigAl ([72.199.216.14]) by fed1rmimpo03.cox.net with bizsmtp id DWAb1g00P0KDB3c04WAbyK; Mon, 28 Feb 2011 13:10:35 -0500 X-VR-Score: -100.00 X-Authority-Analysis: v=1.1 cv=1LdCQuPFu5+SokYlX97zUB/gC+J6QCnVCdc/oYcInGI= c=1 sm=1 a=B9PaJCCeMWsA:10 a=TPvrVRyicAsl4VeEYn0L5g==:17 a=LFmeplwDBGB8XaWqgbIA:9 a=rkMaQTZu7Y0MAncGc_oMvDgaL48A:4 a=CjuIK1q_8ugA:10 a=yMhMjlubAAAA:8 a=BykZKPt9cwMWHd2HsaQA:9 a=PSNQ_B9uzVBzY7-dAXAA:7 a=puRoVmLhkeFaeHL4-Zmnl51A8ooA:4 a=TPvrVRyicAsl4VeEYn0L5g==:117 X-CM-Score: 0.00 Authentication-Results: cox.net; none From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Steve Boese TDC Finder Date: Mon, 28 Feb 2011 10:11:00 -0800 Message-ID: <4BE1713929C54CCE80C339EF130C4791@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01CBD72F.CC4882D0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 Importance: Normal Thread-Index: AcvXa7870NxRYSN7T2a8soPSTJqEvgABgzSw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0014_01CBD72F.CC4882D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Steve wrote: After setting the timing using the minimum chamber volume method, the = spark plug life has increased along with the time it takes SAG to develop. =20 That is interesting. Since I see no noticeable change in performance by reducing timing a couple of steps; perhaps it's worth doing to increase = plug life. Although it may be less an issue burning mogas. =20 I found that I had been operating at 35 degrees BTDC at 5200 RPM and 23" = MAP with the default controller timing setting and Tracy's recommended CAS position. =20 Tracy; If you happen to be following this - based on your advance = curves; how much advance would you expect at these conditions? =20 Al =20 =20 ------=_NextPart_000_0014_01CBD72F.CC4882D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Steve wrote:

After setting the timing using the minimum chamber volume method,  the spark plug life has increased = along with the time it takes SAG to develop.

 

That is interesting.  Since I = see no noticeable change in performance by reducing timing a couple of steps; perhaps = it’s worth doing to increase plug life. Although it may be less an issue = burning mogas.

 

I found that I had been operating = at 35 degrees BTDC at 5200 RPM and = 23” MAP with the default controller timing setting and Tracy’s recommended CAS position.

 

Tracy; If you = happen to be following this – based on your advance curves; how much advance would you = expect at these conditions?

 

Al

 

 

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