X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta12.emeryville.ca.mail.comcast.net ([76.96.27.227] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5595897 for flyrotary@lancaironline.net; Tue, 12 Jun 2012 19:11:51 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.27.227; envelope-from=hoursaway1@comcast.net Received: from omta15.emeryville.ca.mail.comcast.net ([76.96.30.71]) by qmta12.emeryville.ca.mail.comcast.net with comcast id MXjr1j00A1Y3wxoACbBHut; Tue, 12 Jun 2012 23:11:17 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by omta15.emeryville.ca.mail.comcast.net with comcast id MbBG1j00L2xV6SL8bbBGJQ; Tue, 12 Jun 2012 23:11:16 +0000 Date: Tue, 12 Jun 2012 23:11:16 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <335583261.36218.1339542676835.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: [FlyRotary] Fuel presure question. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_36217_439304121.1339542676834" X-Originating-IP: [71.206.108.115] X-Mailer: Zimbra 6.0.13_GA_2944 (ZimbraWebClient - IE8 (Win)/6.0.13_GA_2944) ------=_Part_36217_439304121.1339542676834 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Question about fuel pressure indications, at fast idle 2200 RPM, fuel press= ure 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.=C2=A0 My system is 13B, stock re= d injectors all four, pressure regulator is stock Mazda on the end of fuel = rail with vacume connection from dynamic chamber.=C2=A0 Thanks,=C2=A0 David= R. Cook=C2=A0 RV6A Rotary. ------=_Part_36217_439304121.1339542676834 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit

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.

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