X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 10 Apr 2012 16:07:22 -0400 Message-ID: X-Original-Return-Path: Received: from mail-pz0-f42.google.com ([209.85.210.42] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTPS id 5474499 for lml@lancaironline.net; Mon, 09 Apr 2012 16:05:52 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.42; envelope-from=billhogarty@gmail.com Received: by dang27 with SMTP id g27so5401270dan.1 for ; Mon, 09 Apr 2012 13:05:18 -0700 (PDT) Received: by 10.68.239.42 with SMTP id vp10mr1755882pbc.69.1334001917983; Mon, 09 Apr 2012 13:05:17 -0700 (PDT) X-Original-Return-Path: Received: from [192.168.1.3] (206.sub-166-250-47.myvzw.com. [166.250.47.206]) by mx.google.com with ESMTPS id r6sm15751704pbc.40.2012.04.09.13.05.14 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 09 Apr 2012 13:05:15 -0700 (PDT) Subject: Re: [LML] Re: Engine "surge" issue References: From: Bill Hogarty Content-Type: text/plain; charset=us-ascii X-Mailer: iPad Mail (9B176) In-Reply-To: X-Original-Message-Id: X-Original-Date: Mon, 9 Apr 2012 13:05:15 -0700 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (1.0) Berni My only suggestion would be to let the engine.cool down, DO NOT attempt to f= ly with a surging engine. The engine is talking to you. Please listen to it.!!!!!!!!! Regards. Bill H. On Apr 9, 2012, at 8:54 AM, Randylsnarr wrote: > Berni, 100 octane fuel boils at a very low temp. Fuel is boiling in the in= jection lines when the engine is hot when you are idling. When you are above= idle there is enough fuel traversing the fuel lines to keep them under the b= oiling point which is why you only get this this at idle when the engine is h= ot.=20 >=20 > This was explained to me by don Rivera at airflow performance, he designed= the bendix injection system and is the guy who designed the airflow perform= ance system as well so he knows what he is talking about. This same reason i= s responsible for the hot start issues in our fuel injection set ups. > This is normal... > Randy Snarr=20 > N694RS >=20 >=20 > Sent from my iPad >=20 > On Apr 8, 2012, at 8:37 PM, Berni Breen wrote: >=20 >> Whenever my GAMI injected IO360 powered Lancair 360 is really heated up, f= ollowing a flight and only a short time to cool down (less than 30 minutes) a= nd restarted, the engine will surge during idle and taxi. Again this only h= appens when the engine is hot, has been shut down and restarted. The issue n= ever occurs when the airplane (engine) is started for the first time on any g= iven day (super hot day or super cold day). >>=20 >> Since I feel the issue is fuel related I tried leaning and use of the ele= ctronic fuel pump during idle and taxi with zero improvement. The engine ru= ns very badly with a pronounced surge. If I get on the runway and give the e= ngine full throttle, the engine will develop good power and lift off as if t= here were no issue...that is until yesterday when the engine just about quit= 2000' into my takeoff roll. I aborted the takeoff, did some high speed tax= iing and then took off 3 minutes later (no shutdown). >>=20 >> Today I took off, climbed aggressively to get the engine good and hot and= landed. I shutdown, let the engine sit for about 10 minutes, restarted and= once again experienced the surge during idle and or taxiing. I removed the= upper and lower cowl but am still not able to identify the cause of my issu= e. >>=20 >> Clearly I have an issue that is caused by heat affecting fuel. All of my= fuel lines are heat shielded. Can anyone offer suggestions or ideas that I= can try? >>=20 >> Berni >=20 > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.htm= l