X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 13 Jan 2006 23:05:32 -0500 Message-ID: X-Original-Return-Path: Received: from pop-sarus.atl.sa.earthlink.net ([207.69.195.72] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 925145 for lml@lancaironline.net; Fri, 13 Jan 2006 05:30:31 -0500 Received-SPF: none receiver=logan.com; client-ip=207.69.195.72; envelope-from=tthibaultsprint@earthlink.net Received: from elwamui-milano.atl.sa.earthlink.net ([209.86.224.40]) by pop-sarus.atl.sa.earthlink.net with esmtp (Exim 3.36 #10) id 1Ex7SF-0007MJ-00 for lml@lancaironline.net; Thu, 12 Jan 2006 13:45:47 -0500 X-Original-Message-ID: <278692.1137091539768.JavaMail.root@elwamui-milano.atl.sa.earthlink.net> X-Original-Date: Thu, 12 Jan 2006 13:45:39 -0500 (EST) From: Tom Thibault Reply-To: Tom Thibault X-Original-To: lml@lancaironline.net Subject: Re: [LML] Porting and Polishing Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: EarthLink Zoo Mail 1.0 Bob Smiley wrote: Yes, Flowing the heads, 10.5 to one pistons... Here are two more data points: 1. The folks at Performance Engines, in Corona, CA told me that those changes, minus the propellor should give a FI 180 HP Lyc IO 360 about a 20 HP boost. 2. I was taught a rough approximation of speed gain for HP gain (EVERYTHING else held constant) is V2 = V1 * cube root ( 1 + delta HP/ HP) Where V2 = 191.6, V1 = 185, delta HP = 20, and HP = 180 Experts - please correct the formula if wrong. Taken together though Bob's results make sense. A 20 HP gain would take him from 185 on up to ~191 KTAS. Bob, What were the conditions (temp, alt, baro press, etc) and power setting for those three speeds, 185, 191, and 202 KTAS? Was this WOT, how were you leaned? Thanks, Tom