X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5596937 for flyrotary@lancaironline.net; Wed, 13 Jun 2012 09:01:35 -0400 Received-SPF: none receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@att.net X-IronPort-AV: E=Sophos;i="4.75,763,1330934400"; d="scan'208";a="655122566" Received: from smtp2.corp.netapp.com ([10.57.159.114]) by mx2-out.netapp.com with ESMTP; 13 Jun 2012 06:00:29 -0700 Received: from [10.62.16.167] (ernestc-laptop.hq.netapp.com [10.62.16.167]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q5DD0RIY023179 for ; Wed, 13 Jun 2012 06:00:28 -0700 (PDT) Message-ID: <4FD88E9E.6010104@att.net> Date: Wed, 13 Jun 2012 08:59:10 -0400 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Fuel presure question. References: In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit hoursaway1@comcast.net wrote: > Question about fuel pressure indications, at fast idle 2200 RPM, fuel > pressure is 42 PSI on EM2, if I switch on the back-up pump with the > primary pump the pressure drops to 35 PSI, can here both pumps running, > if I switch off either pump pressure goes back to 42 PSI. My system is > 13B, stock red injectors all four, pressure regulator is stock Mazda on > the end of fuel rail with vacume connection from dynamic chamber. > Thanks, David R. Cook RV6A Rotary. > Is your pressure sensor in backwards? (I kid! I kid!)