X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4218468 for flyrotary@lancaironline.net; Mon, 12 Apr 2010 09:52:53 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao105.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100412135218.VKPR20564.fed1rmmtao105.cox.net@fed1rmimpo02.cox.net> for ; Mon, 12 Apr 2010 09:52:18 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo02.cox.net with bizsmtp id 4dsH1e0074S1t5C04dsHft; Mon, 12 Apr 2010 09:52:17 -0400 X-VR-Score: -100.00 X-Authority-Analysis: v=1.1 cv=KqzZVGv1/pIBe+XbL3gCBfL8vaFXECOST7Bs1vfp5Gs= c=1 sm=1 a=M_c8EEOBP1UA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=kviXuzpPAAAA:8 a=uoMyxcemtzFRSJZYpYUA:9 a=OCUuMxmmuzvzRe_ZRQ8DIzLTty8A:4 a=CjuIK1q_8ugA:10 a=4vB-4DCPJfMA:10 a=4OhaHDrSdRsLJ680d8cA:9 a=DacHSYx9zL-71jP90QsA:7 a=FcpPKqpIaGWfeFQlmIT7y1bZOWYA:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fuel Pressure sensor warning Date: Mon, 12 Apr 2010 06:52:43 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01CADA0C.C07A3E60" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Thread-Index: AcraOo9D6n3mL/MATOCvbfjxOMSYewAFQFEg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_001D_01CADA0C.C07A3E60 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Could the difference be that Tracy runs mo-gas which most likely contains ethanol? Mark S. I have run mogas more than 95% of the total hours. Al On Mon, Apr 12, 2010 at 12:05 AM, Al Gietzen wrote: SO, I can no longer recommend using the VDO pressure sensors for use on fuel systems. Either an isolator must be used or a sensor rated for fuel exposure be installed. I've been using one on my -4 for >7 years with no problems. About 3 years ago VDO started putting a sticker in the pressure sensor package saying not to use them on fuel pressure applications. I suspect they changed something in the manufacturing process. I've had my VDO pressure sensor in service on the fuel system since first engine run in Jan, 2004. Still doing fine. Must be they changed something after that. Al G ------=_NextPart_000_001D_01CADA0C.C07A3E60 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

 

Could the difference be that = Tracy runs mo-gas which most likely contains ethanol? 

 Mark S.

 

I have run mogas more than 95% of = the total hours.

 

Al

On Mon, Apr 12, 2010 at 12:05 = AM, Al Gietzen <ALVentures@cox.net> wrote:

SO,  I = can no longer recommend using the VDO pressure sensors for use on fuel = systems.  Either an isolator must be used or a sensor rated for fuel exposure be installed.  I've been using one on my -4 for >7 years with no = problems.   About 3 years ago VDO started putting a sticker in the pressure = sensor package saying not to use them on fuel pressure applications.   I = suspect they changed something in the manufacturing process. 

 

I’ve had my VDO pressure sensor in service on the fuel system since first = engine run in Jan, 2004.  Still doing fine.  Must be they changed = something after that.

 

Al = G

 

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