Return-Path: Received: from fed1rmmtao07.cox.net ([68.230.241.32] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 329214 for flyrotary@lancaironline.net; Wed, 21 Jul 2004 14:15:27 -0400 Received-SPF: error receiver=logan.com; client-ip=68.230.241.32; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao07.cox.net (InterMail vM.6.01.03.02.01 201-2131-111-104-103-20040709) with ESMTP id <20040721181456.DZIH17678.fed1rmmtao07.cox.net@BigAl> for ; Wed, 21 Jul 2004 14:14:56 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fuel Rail Date: Wed, 21 Jul 2004 11:15:02 -0700 Message-ID: <000001c46f4e$a41a3650$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C46F13.F7BB5E50" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C46F13.F7BB5E50 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Mark;=20 =20 You may want to see how well it runs before you go through a lot of = work. I have the 550's in my 20B, and it ran reasonably well on the dyno at = idle, although we didn't spend much time there. The only problem I had was = when I pulled the throttle from higher RPM and the MAP went below where I had corrected the mixture table, and it would get too rich and die. I = expect that problem will be solved with the EM-2 where I can adjust the mixture = at low MAP without operating there. My conclusion was that the Mazda = injectors handle very short pulse widths prettywell. =20 I hope to know more in a few weeks when I have the thing up and running = on the airplane. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Wednesday, July 21, 2004 7:59 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Fuel Rail =20 Bulent, You lost me. I did modify the original primary fuel rail by cutting off = the ends and welding AN bungs in their place. But that limits me to using = the 550cc injectors. I feel these are way too big for a n/a engine. My objective here is to go to a 460cc injector. But they don't come in the "low-profile" style (correct me if I'm wrong). So, I checked and = discovered that the the standard injector will fit under my custom intake using a = stock 13B fuel rail. I don't see how I could adapt the factory "low-profile" = fuel rail to accept standard 460cc injectors. I'll have to take a picture of what I'm talking about when I get home from work. The "low-profile" injector that fits into the primary intake port sockets is fed through a screened opening on the side of the injector. It has o-rings on the = body to seal when inserted into the fuel rail. I don't see how you could modify this to accept a standard injector. Also, there are two mounting = brackets just next to the injector sockets that holds the fuel rail and injectors = in place. I concluded that the easiest solution would be to use two = standard 13B primary fuel rails, connecting them in the middle with a tube, than build one from scratch. If push comes to shove I can build one from scratch. A picture will make this much clearer. Stay tuned. =20 Mark At 11:00 AM 7/21/2004 -0400, you wrote: On 7/21/04 10:10 AM, "Russell Duffy" <13brv3@bellsouth.net> wrote: Anyone that has a 13B fuel rail they're willing to sell,=20 please contact me at msteitle@mail.utexas.edu. Thanks,=20 Mark S. Mark, my Cosmo 13B has the same injectors as 20B. I cut both ends of the original steel fuel rail and tapped them for 1/4 NPT thread. I m talking about the injectors mounted on the engine block. Can you do that with = yours if you have it?=20 Bulent=20 ------=_NextPart_000_0001_01C46F13.F7BB5E50 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mark;

 

You may want to see how well it = runs before you go through a lot of work.  I have the 550’s in my = 20B, and it ran reasonably well on the dyno at idle, although we didn’t = spend much time there.  The only problem I had was when I pulled the = throttle from higher RPM and the MAP went below where I had corrected the mixture = table, and it would get too rich and die.  I expect that problem will be = solved with the EM-2 where I can adjust the mixture at low MAP without = operating there.  My conclusion was that the Mazda injectors handle very = short pulse widths prettywell.

 

I hope to know more in a few = weeks when I have the thing up and running on the airplane.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Wednesday, July 21, = 2004 7:59 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Fuel Rail

 

Bulent,
You lost me.  I did modify the original primary fuel rail by = cutting off the ends and welding AN bungs in their place.  But that limits me = to using the 550cc injectors.  I feel these are way too big for a n/a = engine.  My objective here is to go to a 460cc injector.  But they don't = come in the "low-profile" style (correct me if I'm wrong).  So, I checked and discovered that the the standard injector will fit under my = custom intake using a stock 13B fuel rail.  I don't see how I could adapt = the factory "low-profile" fuel rail to accept standard 460cc injectors.  I'll have to take a picture of what I'm talking about = when I get home from work.  The "low-profile" injector that fits = into the primary intake port sockets is fed through a screened opening on the = side of the injector.  It has o-rings on the body to seal when inserted = into the fuel rail.  I don't see how you could modify this to accept a = standard injector.  Also, there are two mounting brackets just next to the = injector sockets that holds the fuel rail and injectors in place.  I = concluded that the easiest solution would be to use two standard 13B primary fuel = rails, connecting them in the middle with a tube, than build one from = scratch.  If push comes to shove I can build one from scratch.  A picture = will make this much clearer.  Stay tuned. 

Mark


  At 11:00 AM 7/21/2004 -0400, you wrote:

On 7/21/04 10:10 AM, = "Russell Duffy" <13brv3@bellsouth.net> wrote:

Anyone that has a 13B fuel rail they're = willing to sell,

please contact me at msteitle@mail.utexas.edu.

Thanks,

Mark S.

Mark, my Cosmo 13B has the same injectors as = 20B. I cut both ends of the original steel fuel rail and tapped them for 1/4 = NPT thread. I m talking about the injectors mounted on the engine block. Can = you do that with yours if you have it?
Bulent

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