X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1974317 for flyrotary@lancaironline.net; Sun, 08 Apr 2007 11:24:09 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao101.cox.net (InterMail vM.7.05.02.00 201-2174-114-20060621) with ESMTP id <20070408152323.YQBD792.fed1rmmtao101.cox.net@fed1rmimpo01.cox.net> for ; Sun, 8 Apr 2007 11:23:23 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo01.cox.net with bizsmtp id kfPN1W0091xAn3c0000000; Sun, 08 Apr 2007 11:23:22 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: EC2 injector driver change Date: Sun, 8 Apr 2007 08:23:48 -0800 Message-ID: <000001c779fa$49bebb90$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C779B7.3B9B7B90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C779B7.3B9B7B90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Mark, I found that the lower I set it, the better I could idle. So I loosened = up the screw all the way. that gave me about 40 psi with the engine off = and 32 psi at idle (manifold referenced). I can idle as low as 800-900 but it = is not smooth. It really will not run smoothly until up around 1200-1400 = rpm.=20 David Leonard I also use 40 psi, engine off; drop to about 32 at idle. My experience = is very the same; and that is running with the staging reversed; i.e., it = uses the secondary only (slightly lower flow, MSD injectors out in the TB) at idle. Using the 560 CC primary only the idle is terrible, and doesn't smooth out until above 2000. The mixture is too rich, and as it is = reduced; before it smoothes out - the engine dies. I think this is very = indicative of the pulse clamping issue. =20 I haven't tried lower FP. That should help, but may have other disadvantages in injector spray pattern, etc. =20 Al =20 ------=_NextPart_000_0001_01C779B7.3B9B7B90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mark,

I found that the lower I set it, the better I = could idle. So I loosened up the screw all the way. that gave me = about 40 psi with the engine off and 32 psi at idle (manifold referenced). = I can idle as low as 800-900 but it is not smooth. It really will not = run smoothly until up around 1200-1400 rpm.

David Leonard

I also use 40 psi, engine off; = drop to about 32 at idle. My experience is very the same; and that is = running with the staging reversed; i.e., it uses the secondary only (slightly = lower flow, MSD injectors out in the TB) at idle. Using the 560 CC = primary only the idle is terrible, and doesn’t smooth out until above 2000. The = mixture is too rich, and as it is reduced; before it smoothes out - the engine dies. I think this is very indicative of the pulse clamping = issue.

I haven’t tried lower = FP. That should help, but may have other disadvantages in injector spray = pattern, etc.

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