X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-mb01.mx.aol.com ([64.12.207.164] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4511258 for flyrotary@lancaironline.net; Mon, 18 Oct 2010 21:03:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.207.164; envelope-from=Lehanover@aol.com Received: from imo-da03.mx.aol.com (imo-da03.mx.aol.com [205.188.169.201]) by imr-mb01.mx.aol.com (8.14.1/8.14.1) with ESMTP id o9J12P8E023078 for ; Mon, 18 Oct 2010 21:02:25 -0400 Received: from Lehanover@aol.com by imo-da03.mx.aol.com (mail_out_v42.9.) id q.f5a.2fc9fca (43902) for ; Mon, 18 Oct 2010 21:02:23 -0400 (EDT) Received: from magic-m24.mail.aol.com (magic-m24.mail.aol.com [172.20.22.197]) by cia-dc06.mx.aol.com (v129.5) with ESMTP id MAILCIADC067-ab7e4cbcee1e47; Mon, 18 Oct 2010 21:02:22 -0400 From: Lehanover@aol.com Message-ID: <96bd9.23ffb23a.39ee481e@aol.com> Date: Mon, 18 Oct 2010 21:02:22 EDT Subject: Re: [FlyRotary] Re: Headers To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_96bd9.23ffb23a.39ee481e_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5381 X-AOL-IP: 173.88.9.178 X-Spam-Flag:NO X-AOL-SENDER: Lehanover@aol.com --part1_96bd9.23ffb23a.39ee481e_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 10/18/2010 10:03:46 A.M. Eastern Daylight Time, =20 bbradburry@bellsouth.net writes: Where does the Dutch clamp go? Around the double cuff? Wont that negate= =20 the =E2=80=9Cslip=E2=80=9D?=20 Bill B The Dutch clamp was just to show what a Dutch Clamp was, for a question = =20 many years ago. You can crush a pipe with those things. Go easy. =20 The tabs get a flat strip of steel with slightly over sized holes for =20 movement. The strips go through the center of the stiff springs. The sprin= gs =20 hold the strips in place. If the spring breaks anywhere but the last bend,= the=20 spring stays on the strip. The exhaust is retained in all cases. Or, with= =20 three holes. A doubled run of safety wire goes through the spring using= one=20 set of holes. The springs use a second set of holes, and strips use the= =20 last set with Jet nuts left just snug. In all cases, the spring and exhau= st=20 system is retained if one or two systems fail. =20 Unless there is way too much back pressure, connections close to the engin= e=20 are below ambient pressure, and any leak will allow cool air into the =20 system. =20 I used GE silicone for a gasket between the flange and the engine. The =20 uneven heating of the tubing invites failure. The tubes squirm like a bag= of =20 snakes when heated. They will all bent toward the blast tube if you have= one.=20 I used .135" wall pipe for headers. About 1 7/8" ID. Collector about 24"= =20 along. Notice that some companies have the flange as one piece. This keep= s=20 the tubes next to the engine stable and flat.=20 =20 I heat wrapped a set of Racing Beat headers long before I could tune an = =20 engine. They turned to dust. =20 I got a million of them....... =20 Lynn E. Hanover =20 =20 --part1_96bd9.23ffb23a.39ee481e_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en <= FONT id=3Drole_document color=3D#000000 size=3D2 face=3DArial>

In a message dated 10/18/2010 10:03:46 A.M. Eastern Daylight Time,=20 bbradburry@bellsouth.net writes:

Where does th= e Dutch=20 clamp go? Around the double cuff? Wont that negate the=20 =E2=80=9Cslip=E2=80=9D?

Bill=20 B

The Dutch clamp was just to show what a Dutch Clamp was, for a questi= on=20 many years ago. You can crush a pipe with those things. Go easy.

The tabs get a flat strip of steel with slightly over sized holes for= =20 movement. The strips go through the center of the stiff springs. The sprin= gs=20 hold the strips in place. If the spring breaks anywhere but the last bend,= the=20 spring stays on the strip. The exhaust is retained in all cases. Or, with= three=20 holes. A doubled run of safety wire goes through the spring using one set= of=20 holes. The springs use a second set of holes, and strips use the last set= with=20 Jet nuts left just snug. In all cases, the spring and exhaust system is re= tained=20 if one or two systems fail.

Unless there is way too much back pressure, connections close to the= engine=20 are below ambient pressure, and any leak will allow cool air into the=20 system.

I used GE silicone for a gasket between the flange and the engine. Th= e=20 uneven heating of the tubing invites failure. The tubes squirm like a bag= of=20 snakes when heated. They will all bent toward the blast tube if you have= one. I=20 used .135" wall pipe for headers. About 1 7/8" ID. Collector about 24" alo= ng.=20 Notice that some companies have the flange as one piece. This keeps the tu= bes=20 next to the engine stable and flat.

I heat wrapped a set of Racing Beat headers long before I could tune= an=20 engine. They turned to dust.

I got a million of them.......

Lynn E. Hanover

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