X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 27 Apr 2006 01:30:01 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m21.mx.aol.com ([64.12.137.2] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1082361 for lml@lancaironline.net; Wed, 26 Apr 2006 18:51:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.2; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m21.mx.aol.com (mail_out_v38_r7.5.) id q.3c9.155bb9b (4402) for ; Wed, 26 Apr 2006 18:50:31 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <3c9.155bb9b.31815337@aol.com> X-Original-Date: Wed, 26 Apr 2006 18:50:31 EDT Subject: Re: [LML] FW: Compression, boost, and detonation X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1146091831" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1146091831 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/26/2006 9:58:05 A.M. Central Standard Time, fredmoreno@optusnet.com.au writes: However, keep in mind, bore size also counts a lot in this mix. Detonation is worsened by big cylinders. But the tech literature is clear. To avoid detonation, reduce manifold pressure, reduce temperature, and run rich. Doing two out of three is probably adequate. What the temperature, manifold pressure, mixture, compression ratio map looks like, I am not sure. Only data will tell the deed. Your comments, corrections, and suggestions are welcome. Just keep in mind that like Brent Regan, I know nothing. I only simulate competence. Use your own judgment and experience. Your mileage may vary. Fred, Hmmmmm.... My Honda VTX motorcycle, 110 ci (55 ci/cyl) comes close to my 320 (80 ci/cyl). It uses a 9:1 compression ratio, 4" bore x 4.4" stroke, 3 valves, 3d mapped fuel injection (MAP, OAT, RPM, etc.) thru 12-hole electronic injectors, 2 plugs/cyl, EI, liquid cooled (uh, well that's quite different), etc. This engine produces 95 HP and 115 ft/lb at the rear wheel thru a less than efficient a drive shaft at about 4500-5000 rpm. It requires 86 octane auto gas. No detonation, AND it moves my fat arse and lots of chrome (1000 lbs gross) with impressive haste. Just another data point since I don't even simulate competence although I did stay at a Holiday Inn Express once (and only once). Scott Krueger AKA Grayhawk Lancair N92EX IO320 CS Prop Slow Build 1989, Flown 1996 Aurora, IL (KARR) Eschew Obfuscation! -------------------------------1146091831 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 4/26/2006 9:58:05 A.M. Central Standard Time,=20 fredmoreno@optusnet.com.au writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D3>

However, keep in mind, bore size also counts a l= ot in=20 this mix. Detonation is worsened by big cylinders.

But the tech literature is clear. To avoid= =20 detonation, reduce manifold pressure, reduce temperature, and run rich.&nb= sp;=20 Doing two out of three is probably adequate. What the temperature,=20 manifold pressure, mixture, compression ratio map looks like, I am not sur= e.=20 Only data will tell the deed.

Your comments, corrections, and suggestion= s are=20 welcome. Just keep in mind that like Brent Regan, I know nothing.&nb= sp;=20 I only simulate competence. Use your own judgment and experience.&nb= sp;=20 Your mileage may vary.

Fred,

Hmmmmm.... My Honda VTX motorcycle, 110 ci (55 ci/cyl) comes close to m= y=20 320 (80 ci/cyl). It uses a 9:1 compression ratio, 4" bore x=20= 4.4"=20 stroke, 3 valves, 3d mapped fuel injection (MAP, OAT, RPM, etc.) thru=20 12-hole electronic injectors, 2 plugs/cyl, EI, liquid cooled (uh, well that'= s=20 quite different), etc. This engine produces 95 HP and 115 ft/lb at the= =20 rear wheel thru a less than efficient a drive shaft at about 4500-= 5000=20 rpm. It requires 86 octane auto gas.

No detonation, AND it moves my fat arse and lots of chrome (1000 lbs gr= oss)=20 with impressive haste.

Just another data point since I don't even simulate competence although= I=20 did stay at a Holiday Inn Express once (and only once).

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 CS Prop
Slow Build 1989, Flown 1996=20
Aurora, IL (KARR)

Eschew=20 Obfuscation!

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