Return-Path: Received: from [65.54.168.119] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 817255 for flyrotary@lancaironline.net; Wed, 23 Mar 2005 12:11:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.119; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 23 Mar 2005 09:10:35 -0800 Message-ID: Received: from 4.174.3.16 by BAY3-DAV15.phx.gbl with DAV; Wed, 23 Mar 2005 17:10:35 +0000 X-Originating-IP: [4.174.3.16] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Exhaust pipe size for Renesis... for Tracy Date: Wed, 23 Mar 2005 12:10:33 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006A_01C52FA1.50466D00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Wed, 23 Mar 2005 12:10:33 -0500 X-OriginalArrivalTime: 23 Mar 2005 17:10:35.0685 (UTC) FILETIME=[3A88FD50:01C52FCB] This is a multi-part message in MIME format. ------=_NextPart_000_006A_01C52FA1.50466D00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable One of the advantages of the Renesis is the very non-critical nature of = the exhaust system due to zero overlap. Just keep the backpressure down = to reasonable level and it's as good as it gets. The people with the = most experience were able to get only 4 HP increase going from stock car = manifold to best possible tuned headers (but keeping the rest of = system). Only 8 HP increase going to full race exhaust. Of course you can look at this in two ways. Tracy How much effect does the siamesed port have on exhaust tuning? Since a = significant % of the exhaust is getting mixed at the port, it would = seem=20 to kill the tuning. Charlie Tracy Crook wrote: > "Outside" two ports used 1.75" OD 321 SS pipes. Center "siamesed"=20 > port has 1.5" OD pipe. All ports on Renesis are rectangular so pipe = > was formed to fit the rectangular holes in the home made flanges. > =20 > Tracy (still waiting for food flying weather) > > Tracy, > =20 > What size pipe did you use for the Renesis exhaust ports? Also, > was is round, oval or rectangular.? > =20 > =20 > Thanks, > =20 > Bobby Hughes > >> Homepage: http://www.flyrotary.com/ >> Archive: = http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_006A_01C52FA1.50466D00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

One of the advantages of the Renesis is the very non-critical = nature of the=20 exhaust system due to zero overlap. Just keep the backpressure = down to=20 reasonable level and it's as good as it gets. The people = with the=20 most experience were able to get only 4 HP increase going from stock car = manifold to best possible tuned headers (but keeping the rest of=20 system). Only 8 HP increase going to full race = exhaust.

Of course you can look at this in two ways.

Tracy

How much effect does the siamesed port have on exhaust = tuning?=20 Since a
significant % of the exhaust is getting mixed at the port, = it=20 would seem
to kill the tuning.

Charlie

Tracy Crook=20 wrote:

> "Outside" two ports used 1.75" OD 321 SS = pipes. =20 Center "siamesed"
> port has 1.5" OD pipe. All ports on = Renesis=20 are rectangular so pipe
> was formed to fit the rectangular = holes in=20 the home made flanges.
>
> Tracy (still waiting for = food=20 flying weather)
>
>    =20 Tracy,
>      =
>    =20 What size pipe did you use for the Renesis exhaust ports?=20 Also,
>     was is round, oval or=20 rectangular.?
>     =20
>      =
>    =20 Thanks,
>      =
>    =20 Bobby Hughes
>

>> Homepage: http://www.flyrotary.com/
>&= gt; =20 Archive:   http://lancai= ronline.net/lists/flyrotary/List.html

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