X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.139] (HELO mail-in02.adhost.com) by logan.com (CommuniGate Pro SMTP 5.1c.6) with ESMTP id 1466953 for flyrotary@lancaironline.net; Sun, 15 Oct 2006 00:18:47 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.139; envelope-from=joeh@PilgrimTech.com Received: from Pilgrim10 (c-67-183-14-47.hsd1.wa.comcast.net [67.183.14.47]) by mail-in02.adhost.com (Postfix) with ESMTP id A1C642BFCE0 for ; Sat, 14 Oct 2006 21:17:51 -0700 (PDT) (envelope-from joeh@PilgrimTech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Exhaust Update Date: Sat, 14 Oct 2006 21:17:08 -0700 Message-ID: <008f01c6f010$cd9d0300$8802a8c0@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0090_01C6EFD6.213E2B00" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Thread-Index: AcbwDl5dPHs0H9veRTqOxPytFsC9OwAAR3vA In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0090_01C6EFD6.213E2B00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit >What does it sound like? It is definitely louder than the "Tangential" setup I had before. But it isn't intolerable at all. I have no idea, of course, what it sounds like when going over 5000RPM. But at 4500 RPM and running between a row of hangars (lots of reflective surfaces) it was OK. >Is it louder than using the cast iron exhaust manifold with a short pipe, I know what that is like (used it on first test start of my 13b)? Couldn't tell you. I don't think I've ever heard one up close that has the cast iron. >What about the cost of this good looking set up. If not too expensive and not too loud I would be interested in one on my Cozy. The cost was $685 and that included a couple of SS clamp brackets (that I didn't use :-( ). >Would it give more power than the stock cast iron exhaust? Absolutely. The cast iron exhaust is in the same boat with the tangential muffler - lots of back pressure. This exhaust design helps the engine "breathe" much better and, therefore, produce more power. Cheers, Joe ------=_NextPart_000_0090_01C6EFD6.213E2B00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

>What does it sound like? 

It is definitely louder than the “Tangential” setup = I had before. But it isn’t intolerable at all. I have no idea, of = course, what it sounds like when going over 5000RPM. But at 4500 RPM and running = between a row of hangars (lots of reflective surfaces) it was OK. =

 

>Is it louder than using the cast iron exhaust manifold with = a short pipe, I know what that is like (used it on first test start of my = 13b)? 

Couldn’t tell you. I don’t think I’ve ever = heard one up close that has the cast iron.

 

>What about the cost of this good looking set up. If not too expensive and not too loud I would be interested in one on my = Cozy. 

The cost was $685 and that included a couple of SS clamp = brackets (that I didn’t use L ). 

 

>Would it give more power than the stock cast iron = exhaust?

Absolutely.  The cast iron exhaust is in the same boat with = the tangential muffler – lots of back pressure. This exhaust design = helps the engine “breathe” much better and, therefore, produce more = power.

 

Cheers,

Joe

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