X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3182877 for flyrotary@lancaironline.net; Mon, 22 Sep 2008 17:49:12 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080922214836.JQTW6684.fed1rmmtao102.cox.net@fed1rmimpo01.cox.net> for ; Mon, 22 Sep 2008 17:48:36 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo01.cox.net with bizsmtp id Hxob1a0091cVYgg03xobCe; Mon, 22 Sep 2008 17:48:35 -0400 X-Authority-Analysis: v=1.0 c=1 a=ER7m2Eychbmtqq0ElWgA:9 a=JD96TtoomEbRZmu-ydpCS2tp_oQA:4 a=gJcimI5xSWUA:10 a=cdo5q8vNWBEM9mkMxZUA:9 a=PxlQ51yDfBUHuyAGJsgA:7 a=SfShA7OfmEnM1k5dvVOvp2eOET4A:4 a=37WNUvjkh6kA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: Date: Mon, 22 Sep 2008 14:49:14 -0800 Message-ID: <7C3123229E074F4A87756F56D93C8C89@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0019_01C91CC2.61B11C40" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0019_01C91CC2.61B11C40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 It has been my experience with the EC-2, the coils will stop firing when = the battery cranking voltage drops to a certain voltage. This isn't too = hard to do when cranking a new engine. Does anyone know precisely what that = voltage level is where the coils will no longer fire the plugs? =20 Mark S. =20 Don=92t know exactly, but I have found that the spark is weak (jumps = maybe 1/8 - =BC=94) while cranking the 20B with the starter, when the voltage was = pulled down to about 9.5 =96 10. Using the ignition test mode at 12 volts the = spark will easily jump an inch gap. =20 Prior to the addition of voltage compensation to the EC2 injector pulse width, I=92d notice the engine starting to run rough when the voltage = was down to 11v. Now it is not so sensitive.=20 =20 It might be an interesting test =96 run with the field breaker pulled = until the engine begins to give up, and see what the EM2 voltage reads. = Won=92t be able to tell whether it is the ignition, injectors, computer, or what. = My voltage regulator keeps the voltage at the high end of the range; about 14.75 when the engine in running; so things are tuned to that point. = Things may get out of tune a bit sooner following an alternator failure than if = it was lower. =20 Al G =20 ------=_NextPart_000_0019_01C91CC2.61B11C40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

It has been my experience with = the EC-2, the coils will stop firing when the battery cranking voltage drops to a certain voltage. This = isn't too hard to do when cranking a new engine. Does anyone know = precisely what that voltage level is where the coils will no longer fire the = plugs?

Mark S.

Don’t know exactly, but I = have found that the spark is weak (jumps maybe 1/8 - =BC”) while = cranking the 20B with the starter, when the voltage was pulled down to about 9.5 – = 10.=A0 Using the ignition test mode at 12 volts the spark will easily jump an inch = gap.

Prior to the addition of voltage = compensation to the EC2 injector pulse width, I’d notice the engine starting to = run rough when the voltage was down to 11v.=A0 Now it is not so sensitive. =

It might be an interesting test = – run with the field breaker pulled until the engine begins to give up, = and see what the EM2 voltage reads.=A0 Won’t be able to tell whether it is = the ignition, injectors, computer, or what. My voltage regulator keeps the = voltage at the high end of the range; about 14.75 when the engine in running; so = things are tuned to that point. =A0Things may get out of tune a bit sooner = following an alternator failure than if it was lower.

Al G

------=_NextPart_000_0019_01C91CC2.61B11C40--