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 1421844 for flyrotary@lancaironline.net; Tue, 26 Sep 2006 19:55:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-096-160.carolina.res.rr.com [24.74.96.160]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id k8QNt6m5020877 for ; Tue, 26 Sep 2006 19:55:08 -0400 (EDT) Message-ID: <001301c6e1c7$35de7230$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Fw: Constant Pressure Differential?? Date: Tue, 26 Sep 2006 19:55:13 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C6E1A5.AE771110" 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_0010_01C6E1A5.AE771110 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I thought some of you might be interested in Aeromotive's response to my = question about their fuel pressure regulators - some of which reference = "Vacuum/Boost" and some descriptions only refer to "Boost". Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW ----- Original Message -----=20 From: Aeromotive Tech=20 To: 'Ed Anderson'=20 Sent: Tuesday, September 26, 2006 5:59 PM Subject: RE: Constant Pressure Differential?? Ed,=20 =20 In all cases where an Aeromotive regulator is able to be referenced to = intake manifold pressure, it will affect fuel pressure on a 1:1 ratio = with PSI, in both positive and negative pressure situations, equally. =20 Vacuum is normally measured in "HG (inches mercury) and you would have = to convert to PSI by dividing the "HG by 2. =20 =20 This will ensure that the delta across the injector of flow orifice will = always be maintained. =20 Hope this answers your questions, good luck and thanks for choosing = Aeromotive! =20 Brett Clow Technical Support Aeromotive, Inc. 7805 Barton St. Lenexa, KS 66214 913-647-7300 Ext. 109 -------------------------------------------------------------------------= ------- From: Ed Anderson [mailto:eanderson@carolina.rr.com]=20 Sent: Friday, September 22, 2006 1:55 PM To: tech@aeromotiveinc.com Subject: Constant Pressure Differential?? =20 I notice that some of the descriptions for your fuel pressure regulators = that are manifold referenced refers to "Vacuum/Boost" and others refer = only to "Boost".=20 =20 Does this indicated that those which described as "vacuum/boost" will = cause the fuel pressure to vary in order to maintain a constant pressure = differential between the fuel and the manifold pressure whether below 30 = inch Hg or above 30" Hg? Does the ones which are reference to only = "Boost" indicate that the regulator holds the line fuel pressure = constant until the manifold pressure goes above 30" Hg and then = increases it to compensate for more fuel needed in boost? =20 I am using an EFI that requires a constant pressure differential between = the line fuel pressure and the manifold pressure for optimum = performance. The engine produces approx 200HP. Therefore, I need a = fuel pressure regulator which DOES vary line fuel pressure in order to = maintain a constant pressure differential across the injector at = manifold pressures below 30" Hg. So do all your manifold referenced = fuel pressure regulators do this OR only those which are referenced to = "vacuum" or "vacuum/Boost"? =20 Thanks =20 Ed =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW ------=_NextPart_000_0010_01C6E1A5.AE771110 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I thought some of you might be interested in = Aeromotive's=20 response to my question about their fuel pressure regulators - some of = which=20 reference "Vacuum/Boost" and some descriptions only refer to=20 "Boost".
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.comhttp:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
----- Original Message -----=20
From: Aeromotive=20 Tech
Sent: Tuesday, September 26, 2006 5:59 PM
Subject: RE: Constant Pressure Differential??

Ed,=20

 

In all cases = where an=20 Aeromotive regulator is able to be referenced to intake manifold = pressure, it=20 will affect fuel pressure on a 1:1 ratio with PSI, in both positive and = negative=20 pressure situations, equally.

 

Vacuum is = normally=20 measured in =93HG (inches mercury) and you would have to convert to PSI = by=20 dividing the =93HG by 2. 

 

This will = ensure that=20 the delta across the injector of flow orifice will always be=20 maintained.

 

Hope this = answers your=20 questions, good luck and thanks for choosing=20 Aeromotive!

 

Brett=20 Clow

Technical=20 Support

Aeromotive,=20 Inc.

7805 Barton=20 St.

Lenexa, KS  66214

913-647-7300  Ext.=20 109

From: Ed=20 Anderson [mailto:eanderson@carolina.rr.com]
Sent: Friday, September 22, 2006 = 1:55=20 PM
To:=20 tech@aeromotiveinc.com
Subject:=20 Constant Pressure Differential??

 

I notice that some of the=20 descriptions for your fuel pressure regulators that are manifold=20 referenced  refers to "Vacuum/Boost" and others refer only to=20 "Boost". 

 

 Does this indicated = that those=20 which described as "vacuum/boost"  will cause the fuel pressure to = vary in=20 order to maintain a constant pressure differential = between the=20 fuel and the manifold pressure whether below 30 inch Hg or above 30"=20 Hg?    Does the ones which are reference to only "Boost" = indicate=20 that the regulator holds the line fuel pressure constant until the = manifold=20 pressure goes above 30" Hg and then increases it to compensate for more = fuel=20 needed in boost?

 

I am using an EFI that = requires a=20 constant pressure differential = between the=20 line fuel pressure and the manifold pressure for optimum = performance.  The=20 engine produces approx 200HP.  Therefore, I need a fuel pressure = regulator=20 which DOES vary line fuel pressure in order to maintain a constant = pressure=20 differential=20 across the injector at manifold pressures = below 30"=20 Hg.  So do all your manifold referenced fuel pressure regulators do = this OR=20 only those which are referenced to "vacuum" or=20 "vacuum/Boost"?

 

Thanks

 

Ed

 

Ed Anderson
Rv-6A = N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.comhttp:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW

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