X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 23 May 2012 08:17:26 -0400 Message-ID: X-Original-Return-Path: Received: from mail-wi0-f172.google.com ([209.85.212.172] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5554109 for lml@lancaironline.net; Tue, 22 May 2012 15:48:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.172; envelope-from=grabiel71@gmail.com Received: by wibhj8 with SMTP id hj8so2807095wib.7 for ; Tue, 22 May 2012 12:47:41 -0700 (PDT) MIME-Version: 1.0 Received: by 10.180.80.228 with SMTP id u4mr36311252wix.5.1337716061644; Tue, 22 May 2012 12:47:41 -0700 (PDT) Received: by 10.216.182.10 with HTTP; Tue, 22 May 2012 12:47:41 -0700 (PDT) Received: by 10.216.182.10 with HTTP; Tue, 22 May 2012 12:47:41 -0700 (PDT) In-Reply-To: References: X-Original-Date: Tue, 22 May 2012 15:47:41 -0400 X-Original-Message-ID: Subject: Re: [LML] Re: 360 still surging From: don Grabiel X-Original-To: Lancair Mailing List Content-Type: multipart/alternative; boundary=f46d044288d4aa28b504c0a54a11 --f46d044288d4aa28b504c0a54a11 Content-Type: text/plain; charset=ISO-8859-1 Berni , I do not have any filters in my fuel system other than the gascolator. I have an IO-550N. Never any fuel issues other than vaporization on a hot day. Personally I would not have them. Don G. On May 22, 2012 3:30 PM, "Berni Breen" wrote: > Hi Don: > > No filter between the two. I have 2 filters between the fuel selector and > the gascolator. I pulled both of those today to check but discovered no > restrictions. I had not thought about removing them...do you recommend I > do? > > Thank you. > > Berni Breen > Sent from my iPhone > > On May 22, 2012, at 8:32 AM, don Grabiel wrote: > > Berni, just a thought, but do you have a fuel filter in between the > gascolator and the manual fuel pump on the engine? If so try removing > it. Don G. > On May 21, 2012 4:31 PM, "Berni Breen" wrote: > >> 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. >> >> I have tried suggestions such as ground running the engine at 1700 rpm >> for extended periods following a restart in an attempt to get some air >> moving through the cowl but that has resulted in limited success. So far >> my only remedy is to let the engine sit for a long enough period to let it >> cool significantly. If I do, I have zero issues with surging. >> >> I even removed my fuel injector servo and sent it off for overhaul (not >> an inexpensive undertaking) as another attempt to remedy my problem. That >> idea does not address what I firmly believe to be the problem, heat causing >> fuel vapor lock, but I tried it anyway. I reinstalled the servo yesterday >> and test flew. The plane performed flawlessly as it always does following >> a first start. When I returned home and let it sit for 20 minutes, >> restarted and went to taxi, the surge was just as pronounced as ever. >> >> All of my fuel lines are insulated and fire sleeved. The only exposed >> lines are the small lines that run up to the spider on the top of the >> engine. I do not have any fuel leaks. Turning on my electric fuel pump, >> while increasing fuel pressure from 20 to 25 psi, does not remedy the surge >> issue. >> >> As posted here before I have taken the active and lifted off several >> times with this surge issue going on as the surge quits once I apply full >> throttle. As several of you have pointed out this is not a safe way to >> proceed therefore I am again asking for ideas/suggestions from you guys. >> >> Many years ago in my drag racing days me and several of my friends would >> install a cooling can to cool down the fuel and therefore (we believed) >> helped us produce more power. We would use a coffee can, insert a coil of >> copper fuel line in the can, put this contraption in line (fuel line) fill >> it and fill it with ice prior to a run. While this is not a practical long >> term solution, is this the kind of thing I should be doing to >> prove/disprove my belief that I have a vapor lock issue? >> >> I sincerely appreciate any and all suggestions! >> >> Berni Breen >> Lancair 360 >> >> >> --f46d044288d4aa28b504c0a54a11 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Berni , I do not have any filters in my fuel system other than the gasco= lator.=A0 I have an IO-550N. Never any fuel issues other than vaporization = on a hot day. Personally I would not have them.=A0 Don G.

On May 22, 2012 3:30 PM, "Berni Breen"= <bbreen@cableone.net> wro= te:
Hi Don:

No filter be= tween the two. =A0I have 2 filters between the fuel selector and the gascol= ator. =A0I pulled both of those today to check but discovered no restrictio= ns. =A0I had not thought about removing them...do you recommend I do?

Thank you.

Berni Breen
Sent from my iPhone

On May 22, 2012, at 8:32 AM, don Grabiel <grabiel71@gmail.com> w= rote:

Berni, just a though= t, but do you have a fuel filter in between the gascolator and the manual f= uel pump on the engine? If so try removing it.=A0=A0=A0=A0=A0 Don G.

On May 21, 2012 4:31 PM, "Berni Breen"= <bbreen@cableo= ne.net> wrote: