X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 716505 for flyrotary@lancaironline.net; Fri, 09 Sep 2005 07:05:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-065-188-083-049.carolina.res.rr.com [65.188.83.49]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j89B4D1v023193 for ; Fri, 9 Sep 2005 07:04:14 -0400 (EDT) Message-ID: <000d01c5b52e$39e529d0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] High compression Rotors Date: Fri, 9 Sep 2005 07:04:18 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C5B50C.B2932570" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C5B50C.B2932570 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Should work out well, Dave. The combustion chamber is only concerned with the total pressure - it = doesn't care how it got there. Whether low compression rotors and lots = of boost or high compression rotors with more modest boost levels. = There are some advantages, like when not under boost you will get a bit = more power and efficiency with the higher compression rotors. Also, = using high compression pistons starts the power level at a higher point = and the intake charge is not heated as much with the lower boost levels. = As you are aware, ignition timing, fuel ratio, intercooler and limiting = boost (and perhaps a knock sensor) will all help prevent detonation. ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 08, 2005 10:38 PM Subject: [FlyRotary] High compression Rotors As it turns out, I am going to be using my turbo only for mild boost = and normalization. Keeping that in mind, I am considering installing = high compression rotors in the engine that I am currently building up. = I am talking a max MAP of about 40" but most of the time running a MAP = around 32". I do have an intercooler and see max intake temps of about = 110 deg F. Street porting.=20 Who thinks this is a bad idea? How about if I limited max MAP to = about 38" (5 psi boost)? =20 --=20 Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/_ht_a/vp4skydoc/index.html ------=_NextPart_000_000A_01C5B50C.B2932570 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Should work out well, Dave.
 
The combustion chamber is only concerned with = the total=20 pressure - it doesn't care how it got there.  Whether low = compression=20 rotors and lots of boost or high compression rotors with more modest = boost=20 levels.  There are some advantages, like when not under boost = you will=20 get a bit more power and efficiency with the higher compression = rotors. =20 Also, using high compression pistons starts the power level at a higher = point=20 and the intake charge is not heated as much with the lower boost = levels. =20 As you are aware, ignition timing, fuel ratio, intercooler and = limiting=20 boost  (and perhaps a knock sensor) will all help prevent=20 detonation.
----- Original Message -----
From:=20 David=20 Leonard
Sent: Thursday, September 08, = 2005 10:38=20 PM
Subject: [FlyRotary] High = compression=20 Rotors

As it turns out, I am going to be using my turbo only for mild = boost and=20 normalization.  Keeping that in mind, I am considering installing = high=20 compression rotors in the engine that I am currently building = up.  I am=20 talking a max MAP of about 40" but most of the time running a MAP = around=20 32".  I do have an intercooler and see max intake temps of about = 110 deg=20 F.  Street porting.
 
Who thinks this is a bad idea?  How about if I limited max = MAP to=20 about 38"  (5 psi boost)? 

--
Dave=20 Leonard
Turbo Rotary RV-6 N4VY
http://memb= ers.aol.com/_ht_a/rotaryroster/index.html
http://members= .aol.com/_ht_a/vp4skydoc/index.html=20
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