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 4.3.5) with ESMTP id 1020931 for flyrotary@lancaironline.net; Fri, 24 Jun 2005 19:40:37 -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 j5ONdnL5014411 for ; Fri, 24 Jun 2005 19:39:50 -0400 (EDT) Message-ID: <002501c57916$04688fd0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Engine Rebuilds and turnover torques Date: Fri, 24 Jun 2005 19:39:51 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0022_01C578F4.7D272D40" 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_0022_01C578F4.7D272D40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ok, Bill, don't keep us in suspense{:>) - what did you find when you = pulled the cams and cylinder head?? Ed A ----- Original Message -----=20 From: wrjjrs@aol.com=20 To: Rotary motors in aircraft=20 Sent: Friday, June 24, 2005 5:16 PM Subject: [FlyRotary] Engine Rebuilds and turnover torques Ok Group, Most engines have a predictable torque for turnover in a "like-new" = rebuild. We should check with Mazda to see if they have a suggested new = engine turnover torque. When I was building racing engines the = manufacturers had VERY specific suggested torques, and if your engine = didn't meet spec they (cosworth in this case) suggested you tear it back = down to find out what the problem was, or risk engine damage. !!! Warning Anecdote alert !!! One of the engines I regularly rebuilt for racing was the Kawasaki = Z1-B 903cc 4 cylinder. I was helping a friend using this engine in his = D-sports racing car. He was a very competent mechanic and often did = portions of the build (it was his car) so I would only do the critical = stuff, like cam timing for instance. We had finished one of these 2-man = rebuilds and I turned over the engine BY HAND without the plugs = installed. These engines used a roller bearing crankshaft so turnover = torques were usually very low. Most of the revolution was easy but at = TDC there was just the slightest "tick". The owner wanted to start the = engine but I refused to let him. I pulled the cams and the cylinder = head. I=20 Bill Jepson ------=_NextPart_000_0022_01C578F4.7D272D40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ok, Bill, don't keep us in suspense{:>) - = what did you=20 find when you pulled the cams and cylinder head??
 
Ed A
----- Original Message -----
From:=20 wrjjrs@aol.com
Sent: Friday, June 24, 2005 = 5:16 PM
Subject: [FlyRotary] Engine = Rebuilds and=20 turnover torques

Ok Group,
 Most engines have a predictable=20 torque for turnover in a "like-new" rebuild. We should check=20 with Mazda to see if they have a suggested new engine turnover = torque.=20 When I was building racing engines the manufacturers had VERY specific = suggested torques, and if your engine didn't meet spec they (cosworth in=20 this case) suggested you tear it back down to find out what the = problem was,=20 or risk engine damage.
!!! Warning Anecdote = alert !!!
 One of the engines I regularly rebuilt for racing was the = Kawasaki=20 Z1-B=20 903cc 4 cylinder. I was helping a friend using this engine in his = D-sports=20 racing car. He was a very competent=20 mechanic and often did portions of the build (it was his car) so I = would only=20 do the critical stuff, like cam timing for instance. We had finished = one of=20 these 2-man rebuilds and I turned over the engine BY HAND without the = plugs=20 installed. These engines used a roller bearing crankshaft so turnover = torques=20 were usually very low. Most of the revolution was easy but at TDC there was just the = slightest "tick".=20 The owner wanted to start the engine but I refused to let him. I = pulled the=20 cams and the cylinder head. I=20
Bill Jepson  
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