X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 22 May 2012 09:32:25 -0400 Message-ID: X-Original-Return-Path: Received: from qmta04.westchester.pa.mail.comcast.net ([76.96.62.40] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5552836 for lml@lancaironline.net; Tue, 22 May 2012 06:08:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.40; envelope-from=mjrav@comcast.net Received: from omta08.westchester.pa.mail.comcast.net ([76.96.62.12]) by qmta04.westchester.pa.mail.comcast.net with comcast id Cy2E1j0030Fqzac54y8LPz; Tue, 22 May 2012 10:08:20 +0000 Received: from MarkRavinskiPC ([66.30.31.1]) by omta08.westchester.pa.mail.comcast.net with comcast id Cy8J1j00K01T6pe3Uy8K5h; Tue, 22 May 2012 10:08:20 +0000 X-Original-Message-ID: <04EA789D84F346DD88B2757D7037ECBD@MarkRavinskiPC> From: "Mark Ravinski" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] 360 still surging X-Original-Date: Tue, 22 May 2012 06:08:21 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01CD37E1.49E18C60" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01CD37E1.49E18C60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Berni, The fuel distribution spider has a shutoff valve built in to positively = shut down the flow when the fuel pressure drops far enough. (as during shutdown). Was the spider overhauled with the servo? Maybe = take a look at that valve to check that it has enough spring force and = is not sticking at high temps. What do you see for CHT's and oil temp when you are having this = surging? Does ambient temperature change the problem? On normally aspirated engines, surging is most commonly caused by = induction air leaks. Good luck, Mark Ravinski IO360 1530 hrs. From: Berni Breen=20 Sent: Monday, May 21, 2012 4:30 PM To: lml@lancaironline.net=20 Subject: [LML] 360 still surging Many of you guys have offered suggestions to help me remedy my ongoing = engine surge challenge. As a reminder...my fuel injected IO360 displays = a very pronounced surge during idle and taxi following a flight and = brief shutdown/restart. The problem never occurs when the engine iis = cool. =20 ------=_NextPart_000_000A_01CD37E1.49E18C60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Berni,
The fuel distribution spider has a shutoff = valve built=20 in to positively shut down the flow when the fuel pressure drops far=20 enough.
(as during shutdown).  Was the spider = overhauled=20 with the servo?  Maybe take a look at that valve to check that it = has=20 enough spring force and is not sticking at high temps.
What do you see for CHT's and oil temp =  when you=20 are having this surging?
Does ambient temperature change the=20 problem?
 
On normally aspirated engines, surging is most = commonly=20 caused by induction air leaks.
 
Good luck,
 
Mark Ravinski
IO360  1530 hrs.

From: Berni Breen
Sent: Monday, May 21, 2012 4:30 PM
To: lml@lancaironline.net
Subject: [LML] 360 still surging

Many of you guys have offered suggestions to help me = remedy my=20 ongoing engine surge challenge.  As a reminder...my fuel injected = IO360=20 displays a very pronounced surge during idle and taxi following a flight = and=20 brief shutdown/restart.  The problem never occurs when the engine = iis cool.=20  =20

 
------=_NextPart_000_000A_01CD37E1.49E18C60--