Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Mon, 16 Sep 2002 01:06:44 -0400 Message-ID: X-Original-Return-Path: Received: from ncsmtp03.ogw.rr.com ([24.93.67.84] verified) by logan.com (CommuniGate Pro SMTP 4.0b7) with ESMTP id 1734134 for flyrotary@lancaironline.net; Sun, 15 Sep 2002 22:04:09 -0400 Received: from mail4.carolina.rr.com (fe4 [24.93.67.51]) by ncsmtp03.ogw.rr.com (8.12.5/8.12.2) with ESMTP id g8G247ib010687 for ; Sun, 15 Sep 2002 22:04:07 -0400 (EDT) Received: from o7y6b5 ([24.25.90.153]) by mail4.carolina.rr.com with Microsoft SMTPSVC(5.5.1877.757.75); Sun, 15 Sep 2002 22:04:09 -0400 X-Original-Message-ID: <001801c25d26$0fe065e0$1702a8c0@WorkGroup> From: "Ed Anderson" X-Original-To: References: Subject: Re: [FlyRotary]Another Rotary AD X-Original-Date: Sun, 15 Sep 2002 22:09:17 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 > > > A popular mod for flying rotaries is to install a spacer under the oil > bypass valve to disable it. The piston in the thermal pellet is usually > removed when doing this. > > Another popular mod is to install the Racing Beat under drive pulley on the > crank to slow down the waterpump and alternator. > > If the spacer was made to fit the stock pulley before changing to the > aftermarket pulley, the bypass valve will be in the incorrect position due > to differences in the pulley. This results in low oil pressure, similar to > the blown out O-ring in the front cover. > > This problem has shown up in at least three engines, Jerry Bass' being the > latest. If you experience low oil pressure on a newly built engine, check > this as a possibility. > > Tracy Crook > tcrook@rotaryaviation.com > www.rotaryaviation.com > That is very interesting, Tracy. I did the mod according to the guidance in your orginal conversion manuel and am using the Racing Beat pulley and never had a problem with it in my 86 NA. I now use the thermal pellet repacement plug sold by Dave Atkins in my turbo II and have had not problem. It sounds like a small difference in the configuration of the plug can make a big difference in the oil pressure. Ed Anderson