Return-Path: Received: from out007.verizon.net ([206.46.170.107] verified) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3204621 for flyrotary@lancaironline.net; Mon, 03 May 2004 23:03:44 -0400 Received: from verizon.net ([4.12.145.173]) by out007.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040504030344.YUZR28276.out007.verizon.net@verizon.net> for ; Mon, 3 May 2004 22:03:44 -0500 Message-ID: <40970807.3010405@verizon.net> Date: Mon, 03 May 2004 23:03:35 -0400 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Exhausts: 304 vs 321 References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------060906060308020000040601" X-Authentication-Info: Submitted using SMTP AUTH at out007.verizon.net from [4.12.145.173] at Mon, 3 May 2004 22:03:44 -0500 This is a multi-part message in MIME format. --------------060906060308020000040601 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Bring a magnet. SS should not be magnetic. I imagine that if you go with walls thicker than .035 it won't matter if it's 304 or 321. My 0.035 321 header elbows are still holding up nicely after some 400+ hours. Finn Scott wrote: >Hello All... > >This has probably been discussed many times over, but >I can't seem to find an answer in the archives to the >following... > >For a NA 6 port, 13b, why choose 321 stainless steel >over 304 for the exhaust? Or Inconel 625 over 321? > >Is it a comfort level or a need? Also, it seemed that >321 .035 was living on the edge and that most were >using in the .060+ range. Is this the prevailing >wisdom? > >Finally, is visually possible to determine what is 304 >and what is 321? > >I ask this as I am going over to a used parts race >shop and they just have a pile of exhaust pipe, no >rhyme or reason to the pile. Thus, if it really >didn't matter on the SS alloy I could just pick the >pipes I needed and hack and slash as necessary. > >Thanx!!! Many thanks to all who posted pics of their >coils and water pump surgeries!!!! > >-Scott > > > > > >__________________________________ >Do you Yahoo!? >Win a $20,000 Career Makeover at Yahoo! HotJobs >http://hotjobs.sweepstakes.yahoo.com/careermakeover > > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >>> > > > --------------060906060308020000040601 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Bring a magnet. SS should not be magnetic.
I imagine that if you go with walls thicker than .035 it won't matter if it's 304 or 321.

My 0.035 321 header elbows are still holding up nicely after some 400+ hours.

Finn

Scott wrote:

Hello All...

This has probably been discussed many times over, but
I can't seem to find an answer in the archives to the
following...

For a NA 6 port, 13b, why choose 321 stainless steel
over 304 for the exhaust?  Or Inconel 625 over 321?  

Is it a comfort level or a need?  Also, it seemed that
321 .035 was living on the edge and that most were
using in the .060+ range.  Is this the prevailing
wisdom?

Finally, is visually possible to determine what is 304
and what is 321?  

I ask this as I am going over to a used parts race
shop and they just have a pile of exhaust pipe, no
rhyme or reason to the pile.  Thus, if it really
didn't matter on the SS alloy I could just pick the
pipes I needed and hack and slash as necessary.

Thanx!!!  Many thanks to all who posted pics of their
coils and water pump surgeries!!!!

-Scott



	
		
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