X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 21 Feb 2012 09:01:23 -0500 Message-ID: X-Original-Return-Path: Received: from raven.ravenwebhosting.com ([72.9.254.67] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTPS id 5406874 for lml@lancaironline.net; Mon, 20 Feb 2012 15:53:28 -0500 Received-SPF: none receiver=logan.com; client-ip=72.9.254.67; envelope-from=paul@tbm700.com Received: from 103-57.202-68.tampabay.res.rr.com ([68.202.57.103]:54840 helo=[192.168.15.107]) by raven.ravenwebhosting.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.69) (envelope-from ) id 1RzaE9-0000sA-5u for lml@lancaironline.net; Mon, 20 Feb 2012 15:52:53 -0500 From: paul miller Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-15--723349429 Subject: Re: [LML] Re: Fine wire vs regular spark plugs X-Original-Date: Mon, 20 Feb 2012 15:52:48 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <336132D2-E211-489E-B9A8-12C07E473315@tbm700.com> X-Mailer: Apple Mail (2.1084) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - raven.ravenwebhosting.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tbm700.com X-Source: X-Source-Args: X-Source-Dir: --Apple-Mail-15--723349429 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Craig: I wrote John Herman at Tempest to ask for clarification and = perhaps a presentation on their plugs versus Champion differences. = Also, John comes from Champion so I think he's probably fully in tune = with the aviation side of LOP discussions. But, we'll see. I am = still amazed at the Champion letter and I'm certain Walter A and George = B continue to see these discussion every day on different websites. I = enjoy running LOP and have done so on multiple TSIO-520s and my current = IO-550. Paul On 2012-02-20, at 3:04 PM, Craig Berland. wrote: > Paul, if they have an automotive background, they may have never been = exposed to high power LOP. I clearly remember the first time I was. = In the late =9180=92s I was doing consulting work for Pontiac Motor = Sports on their IMSA GTP cars. We got the fuel injection stuff from = Cosworth and they suggested we run LOP at max power for fuel economy at = Daytona. My reaction was=85.Are you @*&% crazy=85.you must be kidding! > Craig Berland > =20 > The slide was clearly "LOP" and I got the impression they are savvy = enough to understand the difference you mentioned below. I just did not = have time to address the issue with them, but I have his card so I'll = ask what Tempest means. > =20 > Paul Miller > On 2012-02-20, at 11:32 AM, Craig Berland. wrote: >=20 >=20 > =93There was one slide that showed a badly eroded massive and it was = blamed on "severe LOP operation=94 > Let me take a stab at this. I suspect what they said or at least = meant was, the badly eroded electrode was caused by severe detonation as = a result of lean operation. What I mean is, if you are at high power = and 300-400 degF Rich of Peak and you lean to 50degF Rich of Peak, you = are in what I would call a severe engine operation zone caused by = leaning. That is, you are way too lean for Rich of Peak operation at = high power. If you continue leaning to 60-100 degF Lean of Peak, you = are what I would call a pilot with good engine mangagement skills. By = continuing the leaning process you reduce peak cylinder pressures and = therefore peak temperatures. The likelihood of detonation increases as = temperature and pressure increase. By leaning to 60-100 degF LOP, you = significantly reduce the likelihood of detonation from the 50 degF ROP = setting. > Craig Berland > N7VG > =20 > =20 --Apple-Mail-15--723349429 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
Paul, if they have an automotive = background, they may have never been exposed to high power LOP.  =  I clearly remember the first time I was.  In the late =9180=92s= I was doing consulting work for Pontiac Motor Sports on their IMSA GTP =  cars.  We got the fuel injection stuff from Cosworth and they = suggested we run LOP at max power for fuel economy at Daytona.  My = reaction was=85.Are you @*&% crazy=85.you must be = kidding!
Craig = Berland
 
The slide was clearly = "LOP" and I got the impression they are savvy enough to understand the = difference you mentioned below.  I just did not have time to = address the issue with them, but I have his card so I'll ask what = Tempest means.
Paul = Miller
On 2012-02-20, at 11:32 = AM, Craig Berland. wrote:
=93There was one slide = that showed a badly eroded massive and it was blamed on "severe LOP = operation=94
Let me take a stab at this.  I suspect what = they said or at least meant was, the badly eroded electrode was caused = by severe detonation as a result of lean operation.  What I mean = is, if you are at high power and 300-400 degF Rich of Peak and you lean = to 50degF Rich of Peak, you are in what I would call a severe engine = operation zone caused by leaning. That is, you are way too lean for Rich = of Peak operation at high power.  If you continue leaning to 60-100 = degF Lean of Peak, you are what I would call a pilot with good engine = mangagement skills.  By continuing the leaning process you reduce = peak cylinder pressures and therefore peak temperatures.  The = likelihood of detonation increases as temperature and pressure = increase.  By leaning to 60-100 degF LOP, you significantly reduce = the likelihood of detonation from the 50 degF ROP = setting.
Craig Berland