X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2716035 for flyrotary@lancaironline.net; Tue, 05 Feb 2008 10:44:20 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m28.mx.aol.com (mail_out_v38_r9.3.) id q.bbd.29be72b4 (37535) for ; Tue, 5 Feb 2008 10:43:24 -0500 (EST) Received: from webmail-nf07 (webmail-nf07.sim.aol.com [207.200.67.71]) by cia-mb01.mx.aol.com (v121.4) with ESMTP id MAILCIAMB018-929f47a8841b310; Tue, 05 Feb 2008 10:43:23 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Rotor Identification / 20B NA Date: Tue, 05 Feb 2008 10:43:24 -0500 X-AOL-IP: 65.161.241.3 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CA3624FA327EB1_C78_742F_webmail-nf07.sim.aol.com" X-Mailer: AOL Webmail 34032-STANDARD Received: from 65.161.241.3 by webmail-nf07.sim.aol.com (207.200.67.71) with HTTP (WebMailUI); Tue, 05 Feb 2008 10:43:24 -0500 Message-Id: <8CA3624FA327EB1-C78-3AB0@webmail-nf07.sim.aol.com> X-Spam-Flag: NO ----------MB_8CA3624FA327EB1_C78_742F_webmail-nf07.sim.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Another thing to remember is that very few 20Bs were N/A in standard automotive use. The 20B will produce nearly 300 HP normally aspirated at less than 7000 RPM. Al Gietzen dynoed the 20B he put in his cozy and with a fairly restrictive exhaust it made 285 at 68?or 6900 RPM. With a 2.85:1 redrive and any slight flow improvement it would best 300.?Another real plus is that the engine is not at?all highly stressed at that output. Bill Jepson? -----Original Message----- From: cbeazley To: Rotary motors in aircraft Sent: Tue, 5 Feb 2008 12:00 am Subject: [FlyRotary] Rotor Identification / 20B NA Hi Bob;? ? Meant to mention a few more HP options - mild street port and extended street port are also good options if the engine is already apart.? Here are a few web sites with pics of various port types - don't believe everything that is written - particularly idle RPMs.? ? http://www.turborx7.com/portingpictures.htm? ? http://www.mazdarotary.net/porting.htm? ? Cheers? Cary? ? ? --? Homepage: http://www.flyrotary.com/? Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html? ________________________________________________________________________ More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com ----------MB_8CA3624FA327EB1_C78_742F_webmail-nf07.sim.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Another thing to remember is that very few 20Bs were N/A in standard automotive use. The 20B will produce nearly 300 HP normally aspirated at less than 7000 RPM. Al Gietzen dynoed the 20B he put in his cozy and with a fairly restrictive exhaust it made 285 at 68 or 6900 RPM. With a 2.85:1 redrive and any slight flow improvement it would best 300. Another real plus is that the engine is not at all highly stressed at that output.
Bill Jepson

-----Original Message-----
From: cbeazley <cbeazley@innovista.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 5 Feb 2008 12:00 am
Subject: [FlyRotary] Rotor Identification / 20B NA

Hi Bob;

Meant to mention a few more HP options - mild street port and extended street port are also good options if the engine is already apart.
Here are a few web sites with pics of various port types - don't believe everything that is written - particularly idle RPMs.
http://www.turborx7.com/portingpictures.htm
http://www.mazdarotary.net/porting.htm

Cheers
Cary

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