Return-Path: Received: from mail.the-i.net ([206.136.176.3]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Sun, 28 May 2000 16:47:46 -0400 Received: from pavilion (ccb250.the-i.net [206.136.177.250]) by mail.the-i.net (Vircom SMTPRS 4.2.181) with SMTP id for ; Sun, 28 May 2000 15:58:18 -0500 Message-ID: <001001bfc8e6$f999c220$fab188ce@pavilion> From: "J. N. Cameron" To: "Lancair List" Subject: Leaning the IO-550-G2B in the ES Date: Sun, 28 May 2000 15:52:29 -0500 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Well, 100 degrees lean of peak sounds like a bit much, but I did run mine about 50 lean of peak for economy cruise. All the CHT's were good, the oil temp stayed cool, the engine was smooth, and the plugs were just the right color when inspected at about 80 hours. The difference between 50 lean and 50 rich was about 2.5 gph in mine (12 vs 14.5), so I was saving almost 20% on fuel with only about an 8 knot speed penalty. If the CHT's, EGT's, and oil temps all stay in the good green, I don't see a problem. The whole point of the re-worked intake manifold was to even out fuel/air distribution so the engine could run lean. Worked for me. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>