X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1413752 for flyrotary@lancaironline.net; Thu, 21 Sep 2006 14:43:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-110-158.carolina.res.rr.com [24.74.110.158]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id k8LIfQLu010433 for ; Thu, 21 Sep 2006 14:41:28 -0400 (EDT) Message-ID: <000f01c6ddad$b516f860$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost?? Date: Thu, 21 Sep 2006 14:42:35 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C6DD8C.2D7B19C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C6DD8C.2D7B19C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Joe. That supports my "belief" that there are two different = types of "manifold referenced" fuel pressure regulators. One type that = simply increases fuel pressure when boost pressure is detected to = compensate for the increased air flow and the other type also adjusts = the fuel pressure for any change in manifold pressure (vacuum or boost). I presume your pressure gauge remains steady as you adjust throttle ? Ed ----- Original Message -----=20 From: Joe Hull=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 21, 2006 2:24 PM Subject: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost?? So my question to those who realllllllyyyyyy know - is it correct = that for my NA 13B I need a fuel pressure regulator that responses to = manifold "Vacuum" or is the difference in description between "vacuum = referenced and boost referenced " just semantics in advertising? =20 As always - I'm not one who reallllly knows and can't answer the = question. But, I can add that Dave Atkins told me to just cap the = pressure port on my fuel regulator. One of his guys suggested I connect = it to the vacuum line and he said "no, it doesn't do anything on an NA = setup". I'm using the TWM fuel-pressure regulator. So I guess that = follows with your experience of "not doing anything" =20 Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)=20 Redmond (Seattle), Washington ------=_NextPart_000_000C_01C6DD8C.2D7B19C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Joe.  That supports my "belief" = that there=20 are two different types of "manifold referenced" fuel pressure = regulators. =20 One type that simply increases fuel pressure when boost pressure is = detected to=20 compensate for the increased air flow and the other type also adjusts = the fuel=20 pressure for any change in manifold pressure (vacuum or = boost).
 
I presume your pressure gauge remains steady as = you adjust=20 throttle ?
 
Ed
----- Original Message -----
From:=20 Joe Hull=20
Sent: Thursday, September 21, = 2006 2:24=20 PM
Subject: [FlyRotary] Re: Fuel = Pressure=20 Regulator Vacuum or Boost??

So my question to those = who=20 realllllllyyyyyy know -  is it correct that for my NA 13B I need = a fuel=20 pressure regulator that responses to manifold "Vacuum" or is the = difference in=20 description between "vacuum referenced and boost referenced " just = semantics=20 in advertising?

 

As always = =96 I=92m not=20 one who reallllly knows and can=92t answer the question. But, I can = add that=20 Dave Atkins told me to just cap the pressure port on my fuel = regulator. One of=20 his guys suggested I connect it to the vacuum line and he said =93no, = it doesn=92t=20 do anything on an NA setup=94. I=92m using the TWM fuel-pressure = regulator. So I=20 guess that follows with your experience of =93not doing=20 anything=94

 

Joe = Hull

Cozy Mk-IV N31CZ (65 hrs - = Rotary 13B NA)=20

Redmond (Seattle), Washington

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