X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4664877 for flyrotary@lancaironline.net; Wed, 05 Jan 2011 12:01:14 -0500 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.124; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=3uSaImBeuprzHBlOOPjkqgu+7PcxSRW0m2Aphm9Zmck= c=1 sm=0 a=svIKFco9tjcA:10 a=04I7FWNrTfP4RHm++yk/MQ==:17 a=kviXuzpPAAAA:8 a=1gH91b43FxsoFxaXrO4A:9 a=NL5pKIPaYPHuUUCydTnvem_G_bAA:4 a=pILNOxqGKmIA:10 a=4vB-4DCPJfMA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=lnUuFGJlFk2f4NEAZWoA:9 a=nzT7COtJcA0rN3JBtooA:7 a=JsWvNrotyZRhN_QXNO7kHFVb5IEA:4 a=MSl-tDqOz04A:10 a=EzXvWhQp4_cA:10 a=04I7FWNrTfP4RHm++yk/MQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 70.113.14.52 Received: from [70.113.14.52] ([70.113.14.52:55376] helo=DWHPC) by hrndva-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 22/D9-04612-DA3A42D4; Wed, 05 Jan 2011 17:00:30 +0000 Message-ID: From: "Dennis Havarlah" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: GM Coil Comparison Date: Wed, 5 Jan 2011 11:00:25 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02BA_01CBACC7.C1AD2390" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18263 This is a multi-part message in MIME format. ------=_NextPart_000_02BA_01CBACC7.C1AD2390 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Mark - You are not alone with your occasional intermittent misfire. I = also have the miss as you described - I only notice it in cruise. It = happens once every 15 to 30 minutes! I wonder if it is one plug not = firing instead of a complete miss of the cylinder. I'm using the = Renesis RX-8 coils and RX-8 Iridium plugs with Tracy's EC-2. Most of = the time I use mogas. =20 Dennis H. ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Wednesday, January 05, 2011 8:32 AM Subject: [FlyRotary] Re: GM Coil Comparison OK Al, I'll tell you my reason for upgrading. My engine has always = had an occasional intermittent misfire, usually on climbout but = occasionally in cruise. It happens infrequently just to one compression = cycle and then it clears up. Obviously, this does not instill = confidence with pax, or myself either. I've tried various solutions, = but the problem persists. I'm hoping the hotter spark from the 585 = coils will cure this annoying problem. I'll report back after = installing the new coils and test flying. Mark S. On Wed, Jan 5, 2011 at 12:13 AM, Al Gietzen = wrote: So I=92m still waiting for an answer to the question I posed a few = days back. Do we have any real evidence that the higher current spark is = needed in our application; or is going to result in any better = performance? Perhaps it=92s obvious to someone, but I=92m wondering whether it = comparable to watts/channel on a stereo. 50 per channel into good = speakers is enough to drive you out of your home; but the salesperson = will try to convince you that 1000 watts must be 10 times better. The = D580 certainly makes a very good spark, which ignites the mixture just = fine. Once the arc is made and the fuel molecules are burning, does 120 = ma spark give you anything that a 60 ma spark doesn=92t if the voltage = is the same? Presumably it is just a matter of spark duration. Save me the need to do some researchJ Al ------=_NextPart_000_02BA_01CBACC7.C1AD2390 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Mark - You are not alone with your = occasional=20 intermittent misfire.  I also have the miss as you described - I = only=20 notice it in cruise.  It happens once every 15 to 30 minutes!  = I=20 wonder if it is one plug not firing instead of a complete miss of the=20 cylinder.   I'm using the Renesis RX-8 coils and RX-8 Iridium plugs with Tracy's EC-2.  = Most of the=20 time I use mogas. 
 
Dennis H.
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Wednesday, January 05, = 2011 8:32=20 AM
Subject: [FlyRotary] Re: GM = Coil=20 Comparison

OK Al, I'll tell you my reason for upgrading.  My engine has = always=20 had an occasional intermittent misfire, usually on climbout but = occasionally=20 in cruise.  It happens infrequently just to one compression cycle = and=20 then it clears up.  Obviously, this does not instill = confidence with=20 pax, or myself either.  I've tried various solutions, but the = problem=20 persists.  I'm hoping the hotter spark from the 585 coils will = cure this=20 annoying problem.  I'll report back after installing the new=20 coils and test flying.
 
Mark S.

On Wed, Jan 5, 2011 at 12:13 AM, Al Gietzen = <ALVentures@cox.net> = wrote:

So = I=92m still=20 waiting for an answer to the question I posed a few days back. Do we = have=20 any real evidence that the higher current spark is needed in our=20 application; or is going to result in any better=20 performance?

 

Perhaps = it=92s=20 obvious to someone, but I=92m wondering whether it comparable to = watts/channel=20 on a stereo. 50 per channel into good speakers is enough to drive = you out of=20 your home; but the salesperson will try to convince you that 1000 = watts must=20 be 10 times better.  The D580 certainly makes a very good = spark, which=20 ignites the mixture just fine.  Once the arc is made and the = fuel=20 molecules are burning, does 120 ma spark give you anything that a 60 = ma=20 spark doesn=92t if the voltage is the same? =20 Presumably it is just a matter of spark duration.

 

Save me = the need=20 to do some researchJ

 

Al


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