X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-da01.mx.aol.com ([205.188.105.143] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4179349 for flyrotary@lancaironline.net; Fri, 26 Mar 2010 02:26:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.143; envelope-from=WRJJRS@aol.com Received: from imo-da04.mx.aol.com (imo-da04.mx.aol.com [205.188.169.202]) by imr-da01.mx.aol.com (8.14.1/8.14.1) with ESMTP id o2Q6Q0xZ015018 for ; Fri, 26 Mar 2010 02:26:00 -0400 Received: from WRJJRS@aol.com by imo-da04.mx.aol.com (mail_out_v42.9.) id q.c56.7752f9ae (34922) for ; Fri, 26 Mar 2010 02:25:54 -0400 (EDT) Received: from magic-d22.mail.aol.com (magic-d22.mail.aol.com [172.19.155.138]) by cia-da03.mx.aol.com (v127_r1.2) with ESMTP id MAILCIADA037-886a4bac537224f; Fri, 26 Mar 2010 02:25:54 -0400 From: WRJJRS@aol.com Message-ID: <9520d.7f4b7022.38ddad72@aol.com> Date: Fri, 26 Mar 2010 02:25:54 EDT Subject: Setup Planning, was Turbo Planning To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_9520d.7f4b7022.38ddad72_boundary" X-Mailer: 9.0 SE for Windows sub 5046 X-AOL-ORIG-IP: 75.210.183.104 X-AOL-IP: 172.19.155.138 X-Spam-Flag:NO X-AOL-SENDER: WRJJRS@aol.com --part1_9520d.7f4b7022.38ddad72_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/25/2010 9:30:15 PM Pacific Standard Time, lendich@aanet.com.au writes: Mike, Your a hard man, however I do agree with both the Mazdatrix and Powersport results and would expect their operating at optimum configuration and 100% VE. The question in my mind will we all achieve this in our less than perfect installations - probably not. I can't remember exactly but powersport was running two PP sizes, 38mm or 40mm early version and the later 44mm. I believe Bill Jepson is awaiting the results of a more recent 44mm dyno run. That 210hp may be the old 44mm HP numbers - can't remember exactly. Then again it may be the smaller inlet as they were running 6,000 for take-off RPM. A smaller PP will give greater inlet speeds reflecting in VE. George ( down under) George, The 210 HP Powersport engine is the 38mm inlet. P-port of course. The key to their success is a very clean inlet tract. They also tuned for lower RPM by using a long inlet runner. The original Powersport engines were not intended to run over 7000 RPM. That doesn't mean that they couldn't, just that with the long intake pipe you weren't making any more horsepower. Steve tested the larger 44mm inlet. It is far greater on the flow bench, but we will be assembling the test 2 rotor after dynoing the new muffler to get a baseline on the older small port engine. The flow on the 44mm inlet was off the charts, but it must be tractable to be successful. Most decent P-port rotaries will calculate at slightly above 100% VE if based on the inlet diameter. The runner tuning really works when you have no valve to get in the way! Of course if you turbocharge the VE doesn't get better, but the engine doesn't care when being force fed. Bill Jepson --part1_9520d.7f4b7022.38ddad72_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 3/25/2010 9:30:15 PM Pacific Standard Time,=20 lendich@aanet.com.au writes:
Mike,
Your a hard man, however I do agree=20 with both the Mazdatrix and Powersport results and would expect the= ir=20 operating at optimum configuration and 100% VE.
 
The question in my mind will we all ach= ieve this=20 in our less than perfect installations - probably not.
 
I can't remember exactly but powersport= was=20 running two PP sizes, 38mm or 40mm early version and the later 44mm= . I=20 believe Bill Jepson is awaiting the results of a more recent= =20 44mm dyno run. That 210hp may be= the old=20 44mm HP numbers - can't remember exactly. Then again it may be the small= er=20 inlet as they were running 6,000 for take-off RPM. A smaller PP will giv= e=20 greater inlet speeds reflecting in VE.
George ( down=20 under)
George,
The 210 HP Powersport engine is the 38mm inlet. P-port of course. The= key=20 to their success is a very clean inlet tract. They also tuned for lower RP= M by=20 using a long inlet runner. The original Powersport engines were not= =20 intended to run over 7000 RPM. That doesn't mean that they couldn't, just= that=20 with the long intake pipe you weren't making any more horsepower. Steve te= sted=20 the larger 44mm inlet. It is far greater on the flow bench, but= we=20 will be assembling the test 2 rotor after dynoing the new muffler to get= a=20 baseline on the older small port engine. The flow on the 44mm inlet was of= f the=20 charts, but it must be tractable to be successful. Most decent P-port rota= ries=20 will calculate at slightly above 100% VE if based on the inlet diameter.= The=20 runner tuning really works when you have no valve to get in the way! Of co= urse=20 if you turbocharge the VE doesn't get better, but the engine doesn't care= when=20 being force fed.
Bill Jepson
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