X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.93.47.40] (HELO ms-smtp-01-eri0.texas.rr.com) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1042123 for flyrotary@lancaironline.net; Tue, 21 Mar 2006 23:15:45 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.93.47.40; envelope-from=clouduster@austin.rr.com Received: from [10.0.0.99] (cpe-70-123-147-30.austin.res.rr.com [70.123.147.30]) by ms-smtp-01-eri0.texas.rr.com (8.13.4/8.13.4) with ESMTP id k2M4ExOA011677 for ; Tue, 21 Mar 2006 22:14:59 -0600 (CST) Message-ID: <4420CF42.2020109@austin.rr.com> Date: Tue, 21 Mar 2006 22:14:58 -0600 From: Dennis Haverlah User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] plenum volume References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------020406010303050700040606" X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. --------------020406010303050700040606 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit I've never heard of a magic number for the plenum volume. The one I've constructed for my RX-8 is approximately 150 in cube. It is about 4 inches wide, 2 1/2 in tall on average and 15 inches long. The is measured from the throttle body to where the four runners leave the plenum. The four runners are actually an original RX-8 intake cut off just below the first rotary valve. Dennis H. the mallorys wrote: > Is there a magical number for the size of the plenum? Minimum or > maximum? I had heard something about 50% of the 1.5l for the engine, > but don't know if this applies to the rotary. > > Chris --------------020406010303050700040606 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit I've never heard of a magic number for the plenum volume. The one I've constructed for my RX-8 is approximately 150 in cube. It is about 4 inches wide, 2 1/2 in tall on average and 15 inches long. The is measured from the throttle body to where the four runners leave the plenum. The four runners are actually an original RX-8 intake cut off just below the first rotary valve.

Dennis H.

the mallorys wrote:

Is there a magical number for the size of the plenum? Minimum or maximum? I had heard something about 50% of the 1.5l for the engine, but don't know if this applies to the rotary.

Chris

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