X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2081532 for flyrotary@lancaironline.net; Sun, 03 Jun 2007 09:45:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id l53CBZrb015494 for ; Sun, 3 Jun 2007 08:11:38 -0400 (EDT) Message-ID: <003001c7a5d8$56a5bd90$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] MAP Referenced Fuel Pressure Regulator Date: Sun, 3 Jun 2007 08:11:36 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002D_01C7A5B6.CE16A550" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_002D_01C7A5B6.CE16A550 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Mark, Yes, I can tell you, but doubt it will be too meaningful.=20 My regulator does have a reference to the manifold - but, this = apparently only causes the pressure regulator to react to positive = (boost) manifold pressure - in otherwords while under boost pressures = the regulator will increase fuel flow to the injectors by increasing = pressure.It apparently does not regulate the fuel pressure at normal = manifold pressure ranges. =20 But, in any case my pressure regulator keeps the fuel pressure at 41 psi = with one pump on and it increases to 43 with both pumps on. = Again,changing manifold pressure does not affect my fuel pressure. I intend to swap it out (someday) for one that is a true manifold = referenced regulator - but, sigh, just always seems to be something else = to do - and it has worked for me for 10 years. But, I could probably = get an even smoother idle if I swapped it out. I would say 41-43 psi would be a reasonable setting. =20 Ed =20 ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Saturday, June 02, 2007 8:25 PM Subject: [FlyRotary] MAP Referenced Fuel Pressure Regulator Ed, Can you tell me what pressures you're seeing on your fuel pressure at = idle, mid-range, and WOT? Also, please verify that you set the fuel = pressure with engine stopped and fuel pumps ON. What should the fuel = initial fuel pressure be set at for our purposes? =20 Thanks, Mark S. ------=_NextPart_000_002D_01C7A5B6.CE16A550 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Mark,
 
Yes, I can tell you, but doubt it will be too=20 meaningful. 
 
 My regulator does have a reference to the = manifold -=20 but, this apparently only causes the pressure regulator to react to = positive=20 (boost)  manifold pressure  - in otherwords while under boost=20 pressures the regulator will increase fuel flow to the injectors by = increasing=20 pressure.It apparently does not regulate the = fuel=20 pressure at normal manifold pressure ranges. 
 
But, in any case my pressure regulator keeps the = fuel=20 pressure at 41 psi with one pump on and it increases to 43 with both = pumps=20 on.  Again,changing manifold pressure does not affect my fuel=20 pressure.
 
I intend to swap it out (someday) for one that = is a true=20 manifold referenced regulator - but, sigh, just always seems to be = something=20 else to do - and it has worked for me for 10 years.  But, I could = probably=20 get an even smoother idle if I swapped it out.
 
  I would say 41-43 psi would be a = reasonable=20 setting. 
 
Ed
 
 ----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Saturday, June 02, 2007 = 8:25=20 PM
Subject: [FlyRotary] MAP = Referenced Fuel=20 Pressure Regulator

Ed,
 
Can you tell me what pressures you're seeing on your fuel = pressure at=20 idle, mid-range, and WOT?  Also, please verify that you set the = fuel=20 pressure with engine stopped and fuel pumps ON.  What should = the=20 fuel initial fuel pressure be set at for our purposes?  =
 
Thanks,
Mark S.
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