X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 27 May 2008 18:54:59 -0400 Message-ID: X-Original-Return-Path: Received: from smtp121.sbc.mail.sp1.yahoo.com ([69.147.64.94] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with SMTP id 2940654 for lml@lancaironline.net; Tue, 27 May 2008 10:26:59 -0400 Received: (qmail 70351 invoked from network); 27 May 2008 14:26:58 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MIMEOLE; b=CN4lsMlEIzPKxb/XOULzHoIsYuO6LZaaKFoQQd8x42/e9j1m47dp1CnYaq9w0/reGWYo/vRtqDsf83xwQhLqTTTGHMVbncuFla1EIkx+ekRotByH7hzO8CKNzgJBSB2nr4SsRWB9eiLVo/XWXU9trEUZaET2Af3WDPZDG1iXSEw= ; Received: from unknown (HELO Computerroom) (elippse@sbcglobal.net@75.15.139.37 with login) by smtp121.sbc.mail.sp1.yahoo.com with SMTP; 27 May 2008 14:26:58 -0000 X-YMail-OSG: J0FBA3UVM1lJbdtZaOZjurj77JHKCYCmHamQSBzxnyhulJWTjdwtR1cO3TtoKgfrCWoJmRDL4LNaouJE6geTSBPwkdz873ubZCGAU37X0dyFdHL.gtU4AjfBjJJAnLeJp6Y- X-Yahoo-Newman-Property: ymail-3 X-Original-Message-ID: <000801c8c005$bb711920$258b0f4b@Computerroom> From: "Paul Lipps" X-Original-To: "Marv Kaye" Subject: EI, plugs, detonation X-Original-Date: Tue, 27 May 2008 07:27:01 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C8BFCB.0DD79E40" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C8BFCB.0DD79E40 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Randy: I think what you mean is pre-ignition, not detonation, to take = out cylinders. Severe detonation may cause peening of the top of the = piston, broken ring lands, or cause hot spots which could result in = pre-ignition, but it is usually the incredible temperatures and = pressures associated with pre-ignition that will "hole" pistons. (See = Contact! magazine issue 57 for a comprehensive treatment of detonation = and pre-ignition). From your description I would hazard a guess that = what you saw resulted from incorrect timing and mixture. My O-235 is = 9.7:1, and I have dual LSE Plasma Is; My $1.67 Denso plugs run so clean, = with no electrode wear! And my coils are on top of my engine! ------=_NextPart_000_0005_01C8BFCB.0DD79E40 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Randy: I think what you mean is pre-ignition, = not=20 detonation, to take out cylinders. Severe detonation may cause peening = of the=20 top of the piston, broken ring lands, or cause hot spots which could = result in=20 pre-ignition, but it is usually the incredible temperatures and = pressures=20 associated with pre-ignition that will "hole" pistons. (See Contact! = magazine=20 issue 57 for a comprehensive treatment of detonation and pre-ignition). = From=20 your description I would hazard a guess that what you saw resulted from=20 incorrect timing and mixture. My O-235 is 9.7:1, and I have dual LSE = Plasma Is;=20 My $1.67 Denso plugs run so clean, with no electrode wear! And my = coils are=20 on top of my engine!
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