X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 13 Dec 2007 10:14:41 -0500 Message-ID: X-Original-Return-Path: Received: from QMTA02.westchester.pa.mail.comcast.net ([76.96.62.24] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2579250 for lml@lancaironline.net; Thu, 13 Dec 2007 06:59:46 -0500 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.24; envelope-from=mjrav@comcast.net Received: from OMTA11.westchester.pa.mail.comcast.net ([76.96.62.36]) by QMTA02.westchester.pa.mail.comcast.net with comcast id QArX1Y00e0mv7h00503T00; Thu, 13 Dec 2007 11:58:58 +0000 Received: from mjr ([24.60.88.39]) by OMTA11.westchester.pa.mail.comcast.net with comcast id QByw1Y0020qvzSG3X00000; Thu, 13 Dec 2007 11:58:58 +0000 X-Authority-Analysis: v=1.0 c=1 a=aUBlTXZMCfcA:10 a=qw9Ecxo6k1xvsfY68q8A:9 a=dXw1Mshia06oPRehO0P3OD3YEqAA:4 a=EzXvWhQp4_cA:10 a=iYlkOlhu7C0A:10 a=Osa-LI0PmKEXXGSo6qsA:9 a=xnYuMaSVBKfuUzowtYYA:7 a=LSM-k7pE8-hdj6DpeqZnsA6VbN4A:4 a=AfD3MYMu9mQA:10 X-Original-Message-ID: <006001c83d7f$ab503340$27583c18@mjr> From: "Mark Ravinski" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] GAMI Injectors - question for Walter X-Original-Date: Thu, 13 Dec 2007 06:59:52 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005D_01C83D55.C25A2020" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1914 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1914 This is a multi-part message in MIME format. ------=_NextPart_000_005D_01C83D55.C25A2020 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Fred, I'm not Walter and I don't have any hard data either but I can add my = $.02 opinion. One factor you did not mention is that when using ram air, the pressure = in the induction system can be higher than upper deck cooling air flow. = This can cause fuel to actually leak out of injectors causing blue = staining nearby. After seeing Greyhawk's system years ago, I cobbled together a similar = arrangement to supply ram air to the injector shrouds. I can't say I see a bunch of speed improvement as I'm not one for = careful analytical testing. I can say - the improvement in engine = smoothness when running LOP in high altitude cruise is DRAMATIC. There = is simply no roughness anymore. As I lean the engine further and = further - power tapers off without ever running rough. Below 5 GPH = she's still smooth and I start to not trust the fuel flow transducer. Mark Ravinski 360 LNC2 1431 hrs ----- Original Message -----=20 From: Fred Moreno=20 To: lml@lancaironline.net=20 Sent: Wednesday, December 12, 2007 10:05 AM Subject: [LML] GAMI Injectors - question for Walter Referring to Scott's set up using a pitot tube in the cowl inlet to = pressurize the fuel injector air inlets, Walter wrote:=20 "Very nice set-up. Did you use a turbo-type injector to hook to the = ram air? [Yes]" This topic raises some questions in my mind that just won't go away. = Pesky things. Always Curious Fred ------=_NextPart_000_005D_01C83D55.C25A2020 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Fred,
I'm not Walter and I don't have any = hard data=20 either but I can add my $.02 opinion.
One factor you did not mention is that = when using=20 ram air, the pressure in the induction system can be higher than upper = deck=20 cooling air flow.  This can cause fuel to actually leak out of = injectors=20 causing blue staining nearby.
After seeing Greyhawk's system years = ago, I cobbled=20 together a similar arrangement to supply ram air to the injector=20 shrouds.
I can't say I see a bunch of speed = improvement as=20 I'm not one for careful analytical testing.  I can say - the = improvement in=20 engine smoothness when running LOP in high altitude cruise is = DRAMATIC. =20 There is simply no roughness anymore.  As I lean the engine further = and=20 further - power tapers off without ever running rough.  Below 5 GPH = she's=20 still smooth and I start to not trust the fuel flow = transducer.
 
Mark Ravinski
360  LNC2   1431 = hrs
----- Original Message -----
From:=20 Fred Moreno
Sent: Wednesday, December 12, = 2007 10:05=20 AM
Subject: [LML] GAMI Injectors - = question=20 for Walter

Referring = to Scott=92s=20 set up using a pitot tube in the cowl inlet to pressurize the fuel = injector=20 air inlets, Walter wrote:

 

=93Very nice = set-up. Did you=20 use a turbo-type injector to hook to the ram air? [Yes]=94

 

 

This topic = raises=20 some questions in my mind that just won=92t go away.  Pesky=20 things.

 

 

Always = Curious=20 Fred

 

 

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