X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3184502 for flyrotary@lancaironline.net; Tue, 23 Sep 2008 20:51:31 -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.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080924005054.QGDH6175.fed1rmmtao101.cox.net@fed1rmimpo01.cox.net> for ; Tue, 23 Sep 2008 20:50:54 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo01.cox.net with bizsmtp id JQqt1a00W1cVYgg03QqtZ0; Tue, 23 Sep 2008 20:50:53 -0400 X-Authority-Analysis: v=1.0 c=1 a=mNBmde9xpysEdq5Ov1sA:9 a=5iROom2gFPMHsE5uBkpaWRekRCMA:4 a=v47ZLdibA2YA:10 a=syANT5G945lDCMHTxGgA:9 a=6pj6C3wqnt6m2GUq8XwA:7 a=Jt-3CJA2oKEEj5vXXDAsfQ50xtAA:4 a=AfD3MYMu9mQA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Vacuum Pulses Date: Tue, 23 Sep 2008 17:51:36 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C91DA5.05EEDF80" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C91DA5.05EEDF80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Al, after giving some thought about the directions that came with the Mallory pressure regulator, it states that if you are not using a turbo = or some other boost device, to just leave the vacuum port open on the regulator, which may be my best option, as don't think I have any need = to leave it hooked up. No sudden acceleration of engine anticipated. I = plan on doing the orifices for the EC2 though. JohnD =20 Yes, I agree. I started out with a unit that was not pressure = referenced; for the same reason - NA. But it turned out that Tracy's EC2 was setup = with the assumption of MAP referenced pressure, and I had trouble getting it tuned. So I replaced the regulator. This was in the early days of the = EC2; maybe that more recent versions will tune fine without MAP reference. =20 Al ------=_NextPart_000_000D_01C91DA5.05EEDF80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Al, after giving some = thought about the directions that came with the Mallory pressure regulator, it states = that if you are not using a turbo or some other boost device, to just leave the = vacuum port open on the regulator, which may be my best option, as don't = think I have any need to leave it hooked up. No sudden acceleration of = engine anticipated. I plan on doing the orifices for the EC2 = though. JohnD

Yes, I agree. I started out = with a unit that was not pressure referenced; for the same reason = – NA. But it turned out that Tracy’s EC2 was setup with the assumption of MAP referenced pressure, and I had trouble getting it tuned. So I replaced the regulator. This was in the early days of the EC2; maybe that more = recent versions will tune fine without MAP reference.

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