X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-ob0-f180.google.com ([209.85.214.180] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTPS id 5756925 for flyrotary@lancaironline.net; Tue, 11 Sep 2012 12:38:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.180; envelope-from=david.staten@gmail.com Received: by obceq6 with SMTP id eq6so912146obc.25 for ; Tue, 11 Sep 2012 09:38:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=DgDZH/Dc6boEnwDOsXLe69a9oHCG75pEXWadoHN98XE=; b=y/O9ThBPZKRO1/9Qxma+Wja7XlKkl7K7H7L+QUBJ+85KAzAwlTo+kv2Cj6JFaGqgwQ Nb9yISzrnqNUyZnU0CbHmhddUkCbZzfoNLoyYUL2enfHLqjV0BF41QaXwDFCCj700yF0 O6dhhefD8KkFtTRQtPM8HM94DKk8nbryhFiCyYr25ELQsSMP9YaMnJ0mvtnNCVi6FyKy cCKsVr+f9f+aIvihYp30rnkxgHNpg9mz+gNLt/QoqDp+CPTyKjaSGSAWJC5qKBcPB9nw 8YE158+0uH/S0a33sLJHGMM491lb2KavaPC6OEsR6fSXnyLQ7YY8c1Jrs1y6TBtLG7gt BJ8w== Received: by 10.60.171.174 with SMTP id av14mr19439940oec.61.1347381496576; Tue, 11 Sep 2012 09:38:16 -0700 (PDT) Return-Path: Received: from [127.0.0.1] (c-76-31-74-226.hsd1.tx.comcast.net. [76.31.74.226]) by mx.google.com with ESMTPS id bp7sm16757289obc.12.2012.09.11.09.38.15 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 11 Sep 2012 09:38:15 -0700 (PDT) Message-ID: <504F68F4.9050506@gmail.com> Date: Tue, 11 Sep 2012 11:38:12 -0500 From: Dave User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:15.0) Gecko/20120824 Thunderbird/15.0 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: MAP line suggestions References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080604040005000909020204" This is a multi-part message in MIME format. --------------080604040005000909020204 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit BUT... I'd personally drill and tap the top side of the plenum, put a 90 degree fitting in and run the hose along the top of the intake and engine towards the MAP port on the firewall. If that spot is too hot on the firewall, then I'd penetrate elsewhere. Dave On 9/11/2012 11:02 AM, Ernest Chrisltey wrote: > On 09/11/2012 10:24 AM, Bill Bradburry wrote: >> That doesn't look like the rubber vacuum line sold in auto parts >> stores. It >> looks shiny and like plastic. I would switch to the auto parts type. >> I can see probably the two primary injectors right by where the line >> melted. >> That area should not be too hot since fuel is right there. However I >> do see >> the EGT thermocouple line going by the area as well. That may be >> transferring heat to the plastic line. >> Do you have a picture a little farther back to help orientation as to >> where >> we are looking on the engine? >> > > I got the line from Advance Auto, and it was labelled as high-temp MAP > line. I will look to see if I can find something different. > > I've attached the best pic I could find to show where I'm pulling the > MAP from. There really doesn't seem to be many options to relocate > the pickup as Dave suggests, because the line will still need to loop > around to the "bathroom handle" firewall penetration. > > Mark, I don't think I have the option to pick up MAP without being > near the exhaust unless I completely redesign my intake. I do have > the exhaust completely encased in a .020 stainless box, but I think > the issue is that without a blast tube into the encasement, the heat > has no where to go. I also think that air comes off the prop, through > the front mounted radiator, and swirls around the engine inside the > cowl. That would blow air past the exhaust and right across the MAP > and electrical lines. But I've not thought of a way to verify this > theory. > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --------------080604040005000909020204 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
BUT... I'd personally drill and tap the top side of the plenum, put a 90 degree fitting in and run the hose along the top of the intake and engine towards the MAP port on the firewall. If that spot is too hot on the firewall, then I'd penetrate elsewhere.

Dave

On 9/11/2012 11:02 AM, Ernest Chrisltey wrote:
On 09/11/2012 10:24 AM, Bill Bradburry wrote:
That doesn't look like the rubber vacuum line sold in auto parts stores.  It
looks shiny and like plastic.  I would switch to the auto parts type.
I can see probably the two primary injectors right by where the line melted.
That area should not be too hot since fuel is right there.  However I do see
the EGT thermocouple line going by the area as well.  That may be
transferring heat to the plastic line.
Do you have a picture a little farther back to help orientation as to where
we are looking on the engine?


I got the line from Advance Auto, and it was labelled as high-temp MAP line.  I will look to see if I can find something different.

I've attached the best pic I could find to show where I'm pulling the MAP from.  There really doesn't seem to be many options to relocate the pickup as Dave suggests, because the line will still need to loop around to the "bathroom handle" firewall penetration.

Mark, I don't think I have the option to pick up MAP without being near the exhaust unless I completely redesign my intake.  I do have the exhaust completely encased in a .020 stainless box, but I think the issue is that without a blast tube into the encasement, the heat has no where to go.  I also think that air comes off the prop, through the front mounted radiator, and swirls around the engine inside the cowl.  That would blow air past the exhaust and right across the MAP and electrical lines.  But I've not thought of a way to verify this theory.




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