X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost01.isp.att.net ([207.115.11.51] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTP id 2916386 for flyrotary@lancaironline.net; Sat, 10 May 2008 10:13:09 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.115.11.51; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-157-63-81.mco.bellsouth.net[68.157.63.81]) by isp.att.net (frfwmhc01) with SMTP id <20080510141230H01000a278e>; Sat, 10 May 2008 14:12:31 +0000 X-Originating-IP: [68.157.63.81] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Emailing: Decalin Chemicals RunUp Fuel Additive Date: Sat, 10 May 2008 10:12:40 -0400 Message-ID: <56552B0D2B234CE6B39A2A2FE3D1D4BE@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C8B286.61AB09A0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AciyolH8QoMGYWrfQzKdd/WWa69ZTgABAbcw X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16545 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C8B286.61AB09A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Has anyone described this problem to a spark plug manufacturer to see if they have any suggestions on the subject? It seems that they should have a pretty good idea about what is taking place inside the cylinder (sp?) when the plug is firing. This TCP probably doesn't clean the plugs, it probably combines with the lead at high heat and prevents as much of it being deposited as lead oxide. Our plugs up in those shrouded, water cooled holes, probably don't get relatively very hot. At least not like a plug would sticking out in the flame in an air cooled head. Back in the day, I could only get about 12K miles on a set of plugs using high octane ethel. I changed the plugs in my wife's Camary a few months ago at 110K miles. The performance didn't change with the new plugs. Unleaded gas?? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of James Maher Sent: Saturday, May 10, 2008 9:33 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Emailing: Decalin Chemicals RunUp Fuel Additive Ed, Since lead melts at a relatively low temp have your tried using a propane torch to heat the plugs and let the lead drip off. I don't know if it would work but it might be worth a try. Jim Ed Anderson wrote: Actually, I did, Todd. They guy sent me a complimentary spot of the stuff. I flew with it for over 20 hours and it not only did not help but actually seemed to leave more deposits. In the end after some research on the topic, I came to the conclusion that the temperatures did not go high enough to cause the chemical reaction that bound the lead. In other words, it would work with the high temperatures reached in air cooled cylinder heads but apparently not with the lower temp water cooled blocks. At least, that was my conclusion. One of these days, I am going to find a heavy duty ultrasonic cleaner and see if that might "buzz" the lead deposit off the ceramic (without pulverizing the ceramic). Typical abrasive blasting does not work very well due to the shrouding effect of the multiple ground electrodes which tend to shield the ceramic cone. Thanks for bring it to my attention ------=_NextPart_000_000A_01C8B286.61AB09A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 Has anyone described this problem to a spark plug = manufacturer to see if they have any suggestions on the subject?  It seems that = they should have a pretty good idea about what is taking place inside the = cylinder (sp?) when the plug is firing.  This TCP probably doesn’t = clean the plugs, it probably combines with the lead at high heat and prevents as = much of it being deposited as lead oxide.  Our plugs up in those shrouded, = water cooled holes, probably don’t get relatively very hot.  At = least not like a plug would sticking out in the flame in an air cooled = head.

Back in the day, I could only get about 12K miles on a set of = plugs using high octane ethel.  I changed the plugs in my wife’s = Camary a few months ago at 110K miles.  The performance didn’t change = with the new plugs. Unleaded gas??

 

Bill B

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of James Maher
Sent: Saturday, May 10, = 2008 9:33 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Emailing: Decalin Chemicals RunUp Fuel Additive

Ed,

Since lead melts at a relatively low temp have your tried using = a

propane torch to heat the plugs and let the lead drip = off.

I don't know if it would work but it might be worth a = try.

 

Jim

Ed Anderson <eanderson@carolina.rr.com> = wrote:

Actually, I did, Todd.  They guy = sent me a complimentary spot of the stuff.  I flew with it for over 20 = hours and it not only did not help but actually seemed to leave more = deposits.  In the end after some research on the topic, I came to the conclusion = that the temperatures did not go high enough to cause the chemical reaction that = bound the lead.  In other words, it would work with the high temperatures reached in air cooled cylinder heads but apparently not with the lower = temp water cooled blocks.  At least, that was my = conclusion.

 

One of these days, I am going to find = a heavy duty ultrasonic cleaner and see if that might "buzz" the = lead deposit off the ceramic (without pulverizing the ceramic).  Typical abrasive blasting does not work very well due to the shrouding effect of = the multiple ground electrodes which tend to shield the ceramic = cone.

 

Thanks for bring it to my = attention

 

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