Return-Path: Received: from mail2.wwisp.com ([207.98.230.22]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Thu, 26 Oct 2000 06:29:58 -0400 Received: from svr (bh-p3-1-ppp28.wwisp.com [207.98.233.28]) by mail2.wwisp.com (8.9.3/8.9.0) with SMTP id FAA09954; Thu, 26 Oct 2000 05:37:18 -0500 (CDT) Message-ID: <001101c03f41$24f739e0$026f9384@svr> From: "Merrill or Karen Smith" To: Cc: "Lanacair List" Subject: TSIO 550-E Lean of Peak Date: Thu, 26 Oct 2000 05:37:34 -0600 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Eric, et al; It would appear the we have conventional wisdom going in two different directions at once. On one hand it is suggested that the TSIO 550 can be safely run lean of peak so long as power is set at 65% or less. In fact, GAMI literature states that it is safe to run lean of peak under those conditions. On the other hand, it is suggested that the TSIO 550 should NEVER be run lean of peak under any conditions. When we ran GAMI's lean test to see if we needed their injectors we found that fuel flow spread was less than .6 gph between first and last cylinders to peak. In fact, the engine runs very smoothly at 15 gph leaned from 65% with EGTs within a couple of bars of the bottom of the VM1000 graph. With EGTs that low where is the heat going to come from that will ruin the engine? If TCM has something definitive published on the subject I would appreciate a reference. Merrill Smith >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>