X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from pacmmta53-web.windstream.net ([162.39.147.134] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTP id 5190768 for flyrotary@lancaironline.net; Mon, 07 Nov 2011 17:36:28 -0500 Received-SPF: pass receiver=logan.com; client-ip=162.39.147.134; envelope-from=jskmberki@windstream.net Return-Path: X-WS-COS: WSOB806 X-Cloudmark-Category: Undefined:Undefined X-Cloudmark-Analysis: v=1.1 cv=ItSgKUvEgpuArvFeGcEX9ho8h0+4pTt73K5WgrMP114= c=1 sm=0 a=uxxnl-DaXVAA:10 a=cTBwTcxRopoA:10 a=UT_QgiwtmQIA:10 a=IkcTkHD0fZMA:10 a=3oc9M9_CAAAA:8 a=HZJGGiqLAAAA:8 a=5DGelLgShAiGH6PhsAMA:9 a=mrQwdYWUWqOjYysQ08kA:7 a=QEXdDO2ut3YA:10 a=U8Ie8EnqySEA:10 a=HeoGohOdMD0A:10 a=9gfCjSbrmjqp3BMcrRzO+w==:117 X-Cloudmark-Score: 0 Received: from [10.135.134.92] ([10.135.134.92:35237] helo=pamxwww09-z01) by pacmmta53 (envelope-from ) (ecelerity 2.2.3.47 r(39824M)) with ESMTP id C4/8E-21063-A4D58BE4; Mon, 07 Nov 2011 17:35:54 -0500 Message-ID: <20111107173554.W70HH.65769.root@pamxwww09-z01> Date: Mon, 7 Nov 2011 16:35:54 -0600 From: To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Where's the Buttons? Cc: Lehanover@aol.com In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) Sensitivity: Normal X-Originating-IP: 174.130.118.191 X-Auth-IP: 174.130.118.191 Lynn, I think I know which parts to order to rebuild the 2nd gen P Port. I will stick to the stock Mazda parts and get the Mazda solid corner seals. A third gen oil pump might help. I have yet to finalize the injection system but am leaning toward megasquirt. Any helpful suggestions would be greatly appreciated. Joe Berki Limo EZ ---- Lehanover@aol.com wrote: > The rubber plugs vanish if you operate at high power settings for very > long. They just barely last in a street engine. Some usually gone on each tear > down. That is not the problem. The > plug style corner seal is not very strong. All are powdered metal and under > great stress, like a detonation event will crack. I have never found a > stock solid seal broken. I have found the plug style broken many times. Just > order the early solid corner seal. Not an after market solid seal. Mazda > makes the best pieces in most cases. > > Chatter marks are from warn apex seal grooves, low spring pressure, > overheated apex seals, low or no apex seal lubrication. > > Failed compression "O" rings have been over heated. I have never used an > aftermarket "O" ring but as an emergency for a one weekend engine I have used > Teflon or Kapton insulated 18 gage aircraft electrical wire as an "O" ring > along with a very small bead of silicone in the groove. > > It is nearly impossible to get the water "O" ring to fail. (the outer black > one). > > Ran that engine all year since it was not leaking at all. I always use the > stock "O" rings, and even reuse them many times. 99% of the sealing is just > the clamping forces between the housing and the iron. > > Racing Beat says to use 32 pounds of torque on the case bolts in boosted > engines. Also no split timing, and not more than 12 degrees of advance in > ignition timing. I would suggest over-rich mixtures for racing and full > throttle climb out from low altitudes. Keeps things much cooler. More apex seal > lubrication (if premixing). And even with Richards top oil adaptor I would > premix just a bit more oil. The distribution is just much better in a > premix. > > On street ported engines never turn them backwards unless you know that the > builder radiused the bottom of the port to pick up the drooping trailing > end of the side seals. > > Lynn E. Hanover > > > > > In a message dated 11/5/2011 1:14:51 P.M. Paraguay Daylight Time, > keltro@att.net writes: > > Concerning the corner seal rubber buttons it seems that they end up > reverting back to carbon and > lose all elasticity (particularity under high heat) and become useless for > their original purpose which > was to give slightly increased compression at starter speeds...........I > personally will use the solid > racing corner seals available from Mazda and other > sources.................IMHO >