X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from bay0-omc3-s20.bay0.hotmail.com ([65.54.246.220] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1664955 for flyrotary@lancaironline.net; Mon, 11 Dec 2006 18:22:02 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.220; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.89]) by bay0-omc3-s20.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668); Mon, 11 Dec 2006 15:21:14 -0800 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 11 Dec 2006 15:21:14 -0800 Message-ID: Received: from 4.171.147.248 by BAY115-DAV17.phx.gbl with DAV; Mon, 11 Dec 2006 23:21:10 +0000 X-Originating-IP: [4.171.147.248] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: MSD coils - Plug Fouling... again. Date: Mon, 11 Dec 2006 18:21:05 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C9_01C71D51.1F744AE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.50.0034.2000 Seal-Send-Time: Mon, 11 Dec 2006 18:21:06 -0500 X-OriginalArrivalTime: 11 Dec 2006 23:21:14.0748 (UTC) FILETIME=[0D77B3C0:01C71D7B] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_00C9_01C71D51.1F744AE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bob, I didn't even know there was a difference in length. They = obviously work OK in the Renesis and since I used them in my 20B (with = 13B turbo rotor housings) there does not seem to be a problem there = either. The iridium plugs I used do not have the notched shell. They = were pulled from early 2004 Renesis engines so I guess NGK made that = change later. I have never tried changing plug heat ranges since the standard plug = recommended by Mazda has always worked OK for me. Flying at 7000 rpm = (or less) is a lot different than racing at 9500 rpm of course. Tracy (endless wiring of RV-8 panel) ----- Original Message -----=20 From: Rogers, Bob J.=20 To: Rotary motors in aircraft=20 Sent: Monday, December 11, 2006 3:59 PM Subject: [FlyRotary] Re: MSD coils - Plug Fouling... again. Tracy,=20 =20 I noticed that the sparkplugs for the RX-8 (Renesis) engine have a = longer reach for the leading plugs (21 mm) than for the trailing plugs = (3/4 inch =3D19.05 mm). The earlier 13B engines all use a 3/4 inch = reach plug. See the attached web pages:=20 =20 = http://www.ngk.com/results_app.asp?AAIA=3D1192340 = http://www.ngk.com/results_app.asp?AAIA=3D1431319 =20 Does the longer reach of 21 mm create any problem for use in the older = 13B engines? If one wanted to run a hotter plug in the trailing = position, will the longer reach (and hotter) leading plug work in the = trailing plug hole? =20 =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Tracy Crook Sent: Thursday, December 07, 2006 8:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: MSD coils - Plug Fouling... again. =20 . =20 I changed my plugs to iridium type (stock Renesis parts) about 210 = hours ago and they have been wonderful. Never a hint of 'SAG' but I = have run only a few tanks of 100LL during that time. =20 . ------=_NextPart_000_00C9_01C71D51.1F744AE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bob,  I didn't even know there was a difference in = length.  They=20 obviously work OK in the Renesis and since I used them in my 20B (with = 13B turbo=20 rotor housings) there does not seem to be a problem there = either.  =20 The iridium plugs I used do not have the notched shell.  They = were=20 pulled from early 2004 Renesis engines so I guess NGK made that change=20 later.
 
I have never tried changing plug heat ranges since the standard = plug=20 recommended by Mazda has always worked OK for me.  Flying at 7000 = rpm (or=20 less) is a lot different than racing at 9500 rpm of course.
 
Tracy  (endless wiring of RV-8 panel)
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Monday, December 11, 2006 = 3:59=20 PM
Subject: [FlyRotary] Re: MSD = coils - Plug=20 Fouling... again.

Tracy,=20

 

I noticed = that the=20 sparkplugs for the RX-8 (Renesis) engine have a longer reach for the = leading=20 plugs (21 mm) than for the trailing plugs (3/4 inch =3D19.05 mm). =  The earlier 13B engines all = use a 3/4=20 inch reach plug.  See = the attached=20 web pages:

 

http://www.ngk= com/results_app.asp?AAIA=3D1192340

http://www.ngk= com/results_app.asp?AAIA=3D1431319

 

Does the = longer reach=20 of 21 mm create any problem for use in the older 13B engines?  If one wanted to run a = hotter plug in=20 the trailing position, will the longer reach (and hotter) leading plug = work in=20 the trailing plug hole?

 

 

From: = Rotary motors=20 in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy = Crook
Sent: Thursday, December 07, = 2006 8:35=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: MSD coils - Plug Fouling... again.

 

.

 

I changed my plugs to = iridium=20 type (stock Renesis parts) about 210 hours ago and they have been=20 wonderful.  Never a hint of 'SAG' but I have run only a few tanks = of=20 100LL during that time.

 

.

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