X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 16 Dec 2007 16:19:06 -0500 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2582689 for lml@lancaironline.net; Sat, 15 Dec 2007 15:52:00 -0500 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ao8CAE/MY0dAMf4VZGdsb2JhbACCb40EmDE X-IronPort-AV: E=Sophos;i="4.24,172,1196661600"; d="scan'208,217";a="39729729" Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 15 Dec 2007 14:51:21 -0600 Received: (qmail 7193 invoked from network); 15 Dec 2007 14:51:20 -0600 Received: from ip12-197-248-25.networkusa.com (HELO ?10.0.1.4?) (12.197.248.25) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 15 Dec 2007 14:51:20 -0600 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-2-401346995 X-Original-Message-Id: <4DF3F80C-8C45-4160-AB87-7F8488F3305B@advancedpilot.com> From: Walter Atkinson Subject: Re: [LML] GAMI Injectors - More questions for Walter X-Original-Date: Sat, 15 Dec 2007 14:51:18 -0600 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-2-401346995 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes; format=flowed Fred: Do the turbo injectors have better air passages that allow them to do =20= a better atomization job than the normally aspirated injectors, even =20 when installed in a normally aspirated engine? No, I do not think so. Said another way, for the same delta P do the screens on the NA =20 injectors restrict air flow compared to the turbo injectors with =20 their air shroud and supply line? I doubt it. Or is 0.5 inches Hg enough at WOT cruise? I can imagine that a well-designed ram-air upper deck line could =20 produce more than a .5" Hg improvement. This =93reverse pressure delta P=94 would reverse the injector air flow, = =20 and may cause the blue staining that was mentioned around the NA =20 injectors. It would also cause poor atomization that becomes most =20 evident operating LOP. Yes, but as a general rule, the typical blue staining is from the =20 fuel bubbling out AFTER shut down as it vaporizes in the lines. Walter --Apple-Mail-2-401346995 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=WINDOWS-1252
Fred:

Do the turbo injectors have better = air passages that allow them to do a better atomization job than the = normally aspirated injectors, even when installed in a normally = aspirated engine?=A0=A0

No, I do not think = so.

Said another way, for the same delta = P do the screens on the NA injectors restrict air flow compared to the = turbo injectors with their air shroud and supply = line?

=A0

I doubt = it.

=A0Or is 0.5 = inches Hg enough at WOT cruise?

I can = imagine that a well-designed ram-air upper deck line could produce more = than a .5" Hg improvement.
=A0

This =93reverse pressure delta P=94 would reverse the = injector air flow, and may cause the blue staining that was mentioned = around the NA injectors.=A0 It would also cause poor atomization that = becomes most evident operating LOP.=A0

Yes, but as a general rule, = the typical blue staining is from the fuel bubbling out AFTER shut down = as it vaporizes in the lines.

Walter


= --Apple-Mail-2-401346995--