X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3460774 for flyrotary@lancaironline.net; Fri, 30 Jan 2009 13:23:50 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta03.mail.rr.com with ESMTP id <20090130182310.TLXI22141.cdptpa-omta03.mail.rr.com@computername> for ; Fri, 30 Jan 2009 18:23:10 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] 6 Port 13B Porting / was Looking for a rear counterweight Date: Fri, 30 Jan 2009 13:23:17 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001C_01C982DD.E9C5AFC0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: AcmC8HMBhB9BpRGlTke3/8n+Wup5EwAENhyw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20090130182310.TLXI22141.cdptpa-omta03.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_001C_01C982DD.E9C5AFC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kelly, Looks to me like that=92s a reasonable approach on a six port = because I do recall that primary port is pretty small. =20 And I have seen one with the secondary=92s combined and that just looked = too big for our application. But, I guess as Lynn said if you are going to = buzz up to 10K then that radical porting is good. =20 My experience has been what is the cat=92s meow for racers generally = sucks for our application. My first intake was a dual throat Webber TB with 4 injectors. Each throat was 2=94 in dia can you say runner velocity was = low at 4600-4800 rpm. To make a long story short, aircraft performance and = fuel burn indicated I was producing around 133 HP. =20 When I took that set up off and put runners of 1 =BC - 1 =BD=94 dia and = the stock smaller Mazda TB my performance improved to where I could turn 5200 = -5400 rpm static with a 2.17 gear box and 68 x72 prop. Of course, going to = the turbo block, higher compression . =20 Ed =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW =20 _____ =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer Sent: Friday, January 30, 2009 10:35 AM To: Rotary motors in aircraft Subject: [FlyRotary] 6 Port 13B Porting / was Looking for a rear counterweight =20 Bill and Ed, I have street ported my 88 13B.......But only the primary ports (center housing).........It=20 is correct that you have to be careful not to cut into the EGR passages = that are next to the ports.............I used the "Mazdatrix" porting template...........I am including a link to their how-to site explaining the porting process for the 6 port = 13B.............I have no idea if the trouble was worth the effort yet .............FWIW=20 =20 =20 http://www.mazdatrix.com/faq/port6p.htm -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 =20 -------------- Original message from "Ed Anderson" : --------------=20 Yes, I would no longer consider porting a six port myself, but back in = 92 I knew a bit less about the rotary engine. Besides, if the rebuilder had either talked me out of it OR had not charged me for it, the situation = would have been a bit different. =20 =20 I personally prefer the turbo block for porting myself. I used the = Racing Beat Street port on my turbo block and it really woke it up.=20 =20 By the way, did Jason get his situation sorted out? =20 =20 Ed =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW =20 _____ =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Eslick Sent: Friday, January 30, 2009 12:06 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Looking for a rear counterweight =20 Ed, I guess you have seen the Mazdatrix web site where they discourage the = whole porting thing with a 6-port. Just the opposite of what Lynn proposes. =20 Bill On Thu, Jan 29, 2009 at 8:29 PM, Ed Anderson wrote: That's interesting to hear, Bill. My first engine was an 86 N/A that = was suppose to have been street ported (I paid to have it done), but when I later tore it down, much to my surprise there had been no porting done. = So I ported the next engine myself =96 at least I got my money's worth = {:>). =20 =20 __________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_001C_01C982DD.E9C5AFC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Kelly, Looks to me like = that’s a reasonable approach on a six port because I do recall that primary port = is pretty small.=A0

And I have seen one with the = secondary’s combined and that just looked too big for our application.=A0 But, I = guess as Lynn said if = you are going to buzz up to 10K then that radical porting is = good.

 

My experience has been what is the = cat’s meow for racers generally sucks for our application.=A0 My first intake = was a dual throat Webber TB with 4 injectors.=A0 Each throat was 2” in = dia=A0 can you say runner velocity was low at 4600-4800 rpm.=A0 To make a long = story short, aircraft performance and fuel burn indicated I was producing around 133 = HP.

 

When I took that set up off and put runners of 1 =BC - 1 =BD” dia and the stock smaller Mazda TB my = performance improved to where I could turn 5200 -5400 rpm static with a 2.17 gear = box and 68 x72 prop.=A0 Of course, going to the turbo block, higher compression = .

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer
Sent: Friday, January 30, = 2009 10:35 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] 6 = Port 13B Porting / was Looking for a rear = counterweight

 

Bill and Ed,

      I have street ported my 88 = 13B.......But only the primary ports (center housing).........It =

is correct that you have to be careful not to cut into the EGR = passages that are next to the

ports.............I used the "Mazdatrix" porting template...........I am including a link to = their

how-to site explaining the porting process for the 6 port 13B.............I have no idea if the

trouble was worth the effort yet = .............FWIW 

 

 

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold


 

-------------- = Original message from "Ed Anderson" <eanderson@carolina.rr.com>: --------------

Yes, I would no longer consider = porting a six port myself, but back in 92 I knew a bit less about the rotary engine.  Besides, if the rebuilder had either talked me out of it = OR had not charged me for it, the situation would have been a bit = different. 

 

I personally prefer the turbo block = for porting myself.  I used the Racing Beat = Street port on my turbo block and it really woke it up. =

 

By the way, did Jason get his = situation sorted out?

 

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Eslick
Sent: Friday, January 30, = 2009 12:06 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Looking for a rear counterweight

 

Ed,

I guess you have seen the Mazdatrix web site where they discourage the = whole porting thing with a 6-port.  Just the opposite of what Lynn proposes. 

Bill

On Thu, Jan 29, 2009 at 8:29 PM, Ed Anderson <eanderson@carolina.rr.com&g= t; wrote:

That's interesting to hear, Bill.  My first = engine was an 86 N/A that was suppose to have been street ported (I paid to have it = done), but when I later tore it down, much to my surprise there had been no = porting done.  So I ported the next engine myself – at least I got my money's worth {:>).

 

 



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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