X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2629670 for flyrotary@lancaironline.net; Thu, 03 Jan 2008 14:28:13 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m28.mx.aol.com (mail_out_v38_r9.3.) id q.cd4.2139177a (37116) for ; Thu, 3 Jan 2008 14:27:29 -0500 (EST) Received: from webmail-md07 (webmail-md07.webmail.aol.com [64.12.170.145]) by cia-ma01.mx.aol.com (v121.4) with ESMTP id MAILCIAMA012-90fc477d37211be; Thu, 03 Jan 2008 14:27:29 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: Plugs Date: Thu, 03 Jan 2008 14:27:29 -0500 X-AOL-IP: 65.161.241.3 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CA1C55D0997B04_67C_8403_webmail-md07.sysops.aol.com" X-Mailer: AOL Webmail 33161-STANDARD Received: from 65.161.241.3 by webmail-md07.sysops.aol.com (64.12.170.145) with HTTP (WebMailUI); Thu, 03 Jan 2008 14:27:29 -0500 Message-Id: <8CA1C55D0997B04-67C-41F2@webmail-md07.sysops.aol.com> X-Spam-Flag: NO ----------MB_8CA1C55D0997B04_67C_8403_webmail-md07.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Al and Richard, I worked for Kawasaki in the 2 stroke era. We had many types of CDI ignition= . The trouble was we had such a short spark duration that there was trouble=20= igniteing a regular mixture. We were FORCED to use large spark gaps (like .0= 6-.09in.) to get regular plugs to work. Most of the time you will probably f= ind a standard ignition with a longer duration spark will work BETTER. MSD t= ype multiple spark systems are a different matter. Virtually every "super sp= ark plug" has used either a secondary gap or a step up transformer to get th= e "hotter" spark. If your system is marginal you might get better performanc= e for a short time at the expense of your coils which are being forced to wo= rk harder. Since the rotary fires a specific coil more often than a piston e= ngine it might lead to coil failure. Stay with standard plugs and be sure yo= ur system is up to the task and you will be better off. Bill jepson -----Original Message----- From: Al Gietzen To: Rotary motors in aircraft Sent: Thu, 3 Jan 2008 10:05 am Subject: [FlyRotary] Re: Plugs Subject: [FlyRotary] Plugs =C2=A0 Has anyone used any "Pulstar" plugs? Is there really anything to it?=C2=A0 w= ww.pulstarplug.com=C2=A0=20 =C2=A0 Sounds to me a little like another bottle of snake oil. But, who knows. =C2=A0 Richard Sohn =C2=A0 My take is that it is mostly snake oil; but could be beneficial if your plug= s are subject to fouling.=C2=A0 There is very likely very little additional=20= power into the spark; but the available power is concentrated into a very mu= ch shorter time =E2=80=93 instead of lighting up the spark for 30 millions o= f a second, it concentrates it into about a billionth of a second (using the= ir numbers).=C2=A0 Whether this is really advantageous to igniting the mixtu= re; I don=E2=80=99t know, my guess is probably not. =C2=A0 =C2=A0 However; doing that would definitely more likely fire a fouled plug. It is s= imilar to holding a gap between the plug wire and the plug.=C2=A0 I remember= from way back when I was a kid and had an oil-burning Chevy that would foul= plugs. =C2=A0Rigged about a 3/8=E2=80=9D gap between the plug wire and the=20= plugs, and it would run fine. =C2=A0 Al ________________________________________________________________________ More new features than ever. Check out the new AOL Mail ! - http://webmail.= aol.com ----------MB_8CA1C55D0997B04_67C_8403_webmail-md07.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"
Al and Richard,
I worked for Kawasaki in the 2 stroke era. We had many types of CDI ign= ition. The trouble was we had such a short spark duration that there was tro= uble igniteing a regular mixture. We were FORCED to use large spark gaps (li= ke .06-.09in.) to get regular plugs to work. Most of the time you will proba= bly find a standard ignition with a longer duration spark will work BETTER.=20= MSD type multiple spark systems are a different matter. Virtually every "sup= er spark plug" has used either a secondary gap or a step up transformer to g= et the "hotter" spark. If your system is marginal you might get better perfo= rmance for a short time at the expense of your coils which are being forced=20= to work harder. Since the rotary fires a specific coil more often than a pis= ton engine it might lead to coil failure. Stay with standard plugs and be su= re your system is up to the task and you will be better off.
Bill jepson


-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, 3 Jan 2008 10:05 am
Subject: [FlyRotary] Re: Plugs

Subject: [FlyRotary] Plugs
 
Has anyone used any= "Pulstar" plugs? Is there really anything to it?  www.pulstarplug.com 
 
Sounds to me a litt= le like another bottle of snake oil. But, who knows.
 
Richard Sohn=
 
My take is that it=20= is mostly snake oil; but could be beneficial if your plugs are subject to fo= uling.  There is very likely very little additional power into the spar= k; but the available power is concentrated into a very much shorter time=20= =E2=80=93 instead of lighting up the spark for 30 millions of a second, it c= oncentrates it into about a billionth of a second (using their numbers).&nbs= p; Whether this is really advantageous to igniting the mixture; I don=E2=80= =99t know, my guess is probably not.  
 
However; doing that= would definitely more likely fire a fouled plug. It is similar to holding a= gap between the plug wire and the plug.  I remember from way back when= I was a kid and had an oil-burning Chevy that would foul plugs.  Rigge= d about a 3/8=E2=80=9D gap between the plug wire and the plugs, and it would= run fine.
 
Al
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