X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-mb02.mx.aol.com ([64.12.207.163] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5384836 for flyrotary@lancaironline.net; Mon, 06 Feb 2012 11:52:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.207.163; envelope-from=bktrub@aol.com Received: from mtaomg-ma02.r1000.mx.aol.com (mtaomg-ma02.r1000.mx.aol.com [172.29.41.9]) by imr-mb02.mx.aol.com (8.14.1/8.14.1) with ESMTP id q16GpGib009990 for ; Mon, 6 Feb 2012 11:51:16 -0500 Received: from core-duc003b.r1000.mail.aol.com (core-duc003.r1000.mail.aol.com [172.29.164.137]) by mtaomg-ma02.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id B0152E0000A1 for ; Mon, 6 Feb 2012 11:51:15 -0500 (EST) References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: Upper end tuning In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: bktrub@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CEB306ACFACBBF_1F0C_79205_webmail-m021.sysops.aol.com" X-Mailer: AOL Webmail 35412-STANDARD Received: from 50.46.146.205 by webmail-m021.sysops.aol.com (64.12.183.102) with HTTP (WebMailUI); Mon, 06 Feb 2012 11:51:15 -0500 Message-Id: <8CEB306ACF86A59-1F0C-1EECE@webmail-m021.sysops.aol.com> X-Originating-IP: [50.46.146.205] Date: Mon, 6 Feb 2012 11:51:15 -0500 (EST) x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20110426; t=1328547076; bh=K6tABLCUXJqLuAOcIn3SPstxbDiDF1YH3BEkNMUdypk=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=Dpnf+EX4zAlG1NLKi8xPMDwD/+m2pWsx4CRPDfFt/oQjbsTkVZn25iDGJBgBky92n hjaHB6FmvrP//4hJvyyZxaYdSpaXCDc5n18x+YL0TAwtDM9n8gEdugb/te5Jr3ac9E 4CRYWL/SAvmXmDthVUy6UGGrgS6aCFmyS+hn3Q8c= X-AOL-SCOLL-SCORE: 0:2:477770656:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d29094f300503611d This is a multi-part message in MIME format. ----------MB_8CEB306ACFACBBF_1F0C_79205_webmail-m021.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="us-ascii" LS1 coils, I think I'm using 18 Gauge wire, about 3 feet from the source to= the coils. I"m using stock CAS and trigger wheel.=20 Brian Trubee -----Original Message----- From: Ernest Christley To: Rotary motors in aircraft Sent: Mon, Feb 6, 2012 8:27 am Subject: [FlyRotary] Re: Upper end tuning bktrub@aol.com wrote: This was at any altitude- I'll take off at sea level and on climb out if the rpms get to 6100, the engine stumbles as if it were suddenly way too lean. So, what I'm saying is that this can happen at any altitude. It seems to be more of a RPM issue than of manifold pressure. =20 As far as the EGT goes, it may be an instrumentation error. =20 I've tried to richen up the mixture and then go up past 6100 rpm, but I still get the power drop. =20 And yes, I have the EM2 set at the factory setting for engine max power, so all I'm seeing is just an arbitrary number. =20 So, I'm going to change spark plugs and do some more flying. The weather is nice out here for the next few days so I have some opportunity to fully explore what's going on. =20 These symptoms could all be explained by the coils not being able to keep u= p,=20 ncluding the EGT anomaly. It could also e an issue with a trigger wheel that isn't able to keep up. What coils are you using? Do you have any way of increasing the power that= is=20 eaching them (increase voltage? remove upply resistance by shortening the supply and ground paths, or increasing t= he=20 ire gauge?) -- omepage: http://www.flyrotary.com/ rchive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.h= tml ----------MB_8CEB306ACFACBBF_1F0C_79205_webmail-m021.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="us-ascii"
LS1 coils, I think I'm usi= ng 18 Gauge wire, about 3 feet from the source to the coils. I"m using stoc= k CAS and trigger wheel.
 
Brian Trubee


= -----Original Message-----
From: Ernest Christley <echristley@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, Feb 6, 2012 8:27 am
Subject: [FlyRotary] Re: Upper end tuning

bktrub@aol.com wrote:
> This was at any altitude- I'll take off at sea level  and on climb out
> if the rpms get to 6100, the engine stumbles as if it were suddenly wa=
y
> too lean. So, what I'm saying is that this can happen at any altitude.
> It seems to be more of a RPM issue than of manifold pressure.
> =20
> As far as the EGT goes, it may be an instrumentation error.
> =20
> I've tried to richen up the mixture and then go up past 6100 rpm, but =
I
> still get the power drop.
> =20
> And yes, I have the EM2 set at the factory setting for engine max powe=
r,
> so all I'm seeing is just an arbitrary number.
> =20
> So, I'm going to change spark plugs and do some more flying. The weath=
er
> is nice out here for the next few days so I have some opportunity to
> fully explore what's going on.
> =20

These symptoms could all be explained by the coils not being able to keep u=
p,=20
including the EGT anomaly.  It could also
be an issue with a trigger wheel that isn't able to keep up.

What coils are you using?  Do you have any way of increasing the power that=
 is=20
reaching them (increase voltage? remove
supply resistance by shortening the supply and ground paths, or increasing =
the=20
wire gauge?)

--
Homepage:  http://www=
.flyrotary.com/
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