X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 20 Feb 2012 07:51:54 -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 5402670 for lml@lancaironline.net; Fri, 17 Feb 2012 13:42:20 -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]:61870 helo=[192.168.15.108]) by raven.ravenwebhosting.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.69) (envelope-from ) id 1RySka-0007Iz-5N for lml@lancaironline.net; Fri, 17 Feb 2012 13:41:44 -0500 From: paul miller Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-44--990416844 Subject: Re: [LML] Re: Fine wire vs regular spark plugs X-Original-Date: Fri, 17 Feb 2012 13:41:41 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <74A85A77-2D2F-4926-A269-D2C5F490164A@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-44--990416844 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 As a matter of interest, Tempest made a presentation to our EAA meeting = last night and they had a lot of good technical info, most of which = backs up what we've been saying here: 1) Massives typically good for 500 hours, fine wire 1800 hours. 2) Iridium replaced platinum because of leaded fuel issues 3) Resistance should max out at 5000 ohms then replace plug. Champion = has that problem and Tempest created their own "fired in" solution made = by Honeywell that the company says solves the problem. The resistor is = not there for radio interference but for capacitance reasons. =20 4) Dropping a plug is replacing that plug--no questions. 5) Gaps on massives can be closed, never opened because it cracks = insulators. 6) Rotating plugs has real benefits and the rotation is listed on the = Tempest website. There was one slide that showed a badly eroded massive and it was blamed = on "severe LOP operation". I have trouble understanding this link but = maybe there's data to support it. There was quite a bit of information given with good slides. If anyone = wants a presentation for their group, it is worthwhile and a lot of data = is on the tempest website. Paul=20 Spruce Creek Legacy RG On 2012-02-17, at 1:07 PM, Robert R Pastusek wrote: > Dico wrote: >=20 > What do you run for sparkplugs in your TSIO550 engines -- the finewire = or the regular ones? Any comments or reviews? Does one last longer = than the other? Which is better for LOP operatinos? >=20 > Dico, > I=92ve run Champion massive electrode plugs in my TSIO 550 for about = 750 hours, changing them at about 500 hours, =93just because.=94 The = electrodes were worn down, but still easy to gap and running fine. The = =93new=94 plugs have about 250 hours on them and look fine. I clean and = re-gap them at 100 hours run time (every second oil change). They have = performed flawlessly, less the one I dropped on the floor. This caused = the inner white glass insulator to crack. Fortunately, it fell out so = the defect was easy to see. I=92ve never measured the internal = resistance of these plugs (ref recent LML discussion), but thought I=92d = do this at the next cleaning to see how they measure up. I have always = run this engine LOP. > =20 > I have never used fine-wire plugs in an airplane engine. They are a = lot more expensive, and theoretically, have a much longer life. Against = that, I=92ve seen some with cracked center electrodes that required = replacement with only a couple hundred hours of run time. Others could = advise on these; my information is second hand. > =20 > Bob --Apple-Mail-44--990416844 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 As a = matter of interest, Tempest made a presentation to our EAA meeting last = night and they had a lot of good technical info, most of which backs up = what we've been saying here:

1) Massives typically = good for 500 hours, fine wire 1800 hours.
2) Iridium replaced = platinum because of leaded fuel issues
3) Resistance should = max out at 5000 ohms then replace plug.    Champion has that = problem and Tempest created their own "fired in" solution made by = Honeywell that the company says solves the problem.  The resistor = is not there for radio interference but for capacitance reasons. =   
4) Dropping a plug is replacing that plug--no = questions.
5) Gaps on massives can be closed, never opened = because it cracks insulators.
6) Rotating plugs has real = benefits and the rotation is listed on the Tempest = website.

There was one slide that showed a = badly eroded massive and it was blamed on "severe LOP operation". =  I have trouble understanding this link but maybe there's data to = support it.

There was quite a bit of = information given with good slides.   If anyone wants a = presentation for their group, it is worthwhile and a lot of data is on = the tempest = website.

Paul 
Spruce = Creek
Legacy RG


On = 2012-02-17, at 1:07 PM, Robert R Pastusek wrote:

Dico = wrote:

What do you run for sparkplugs in your TSIO550 = engines -- the finewire or the regular ones?  = Any comments or reviews?  Does one last longer than the = other?  Which is better for LOP operatinos?

Dico,
I=92ve run Champion massive electrode plugs in my TSIO = 550 for about 750 hours, changing them at about 500 hours, =93just = because.=94 The electrodes were worn down, but still easy to gap and = running fine. The =93new=94 plugs have about 250 hours on them and look = fine. I clean and re-gap them at 100 hours run time (every second oil = change). They have performed flawlessly, less the one I dropped on the = floor. This caused the inner white glass insulator to crack. = Fortunately, it fell out so the defect was easy to see. I=92ve never = measured the internal resistance of these plugs (ref recent LML = discussion), but thought I=92d do this at the next cleaning to see how = they measure up. I have always run this engine LOP.
 
I have never used = fine-wire plugs in an airplane engine. They are a lot more expensive, = and theoretically, have a much longer life. Against that, I=92ve seen = some with cracked center electrodes that required replacement with only = a couple hundred hours of run time. Others could advise on these; my = information is second hand.