X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtprh01.spirittelecom.com ([165.166.0.77] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTPS id 1422558 for flyrotary@lancaironline.net; Wed, 27 Sep 2006 08:20:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=165.166.0.77; envelope-from=jewen@comporium.net X-Report-Abuse-To: abuse@spirittelecom.com X-DKIM: Sendmail DKIM Filter v0.2.1 smtprh01.spirittelecom.com k8RCKKq3000902 DKIM-Signature: a=rsa-sha1; c=nowsp/nowsp; d=comporium.net; s=spiritmail; t=1159359621; h=DomainKey-Signature:Message-ID:From:To:References: Subject:Date:MIME-Version:Content-Type:X-Priority: X-MSMail-Priority:X-Mailer:X-MIMEOLE:X-Virus-Scanned: X-Virus-Status; b=O5EOP3LLwfzgOB5V3/zceZcnbf7vGfKVlrvmR7E+tNQ7haRf7 Z5ab2rdZy/X55ceJOLgDrwGp98KYx/ThnxV0w== DomainKey-Signature: a=rsa-sha1; s=spiritmail; d=comporium.net; c=nofws; q=dns; h=message-id:from:to:references:subject:date:mime-version: content-type:x-priority:x-msmail-priority:x-mailer:x-mimeole: x-virus-scanned:x-virus-status; b=mGL6aggxSfChyeJelGFjo42CeiCk89wfOaIPTT3W9Y85WvCSVQ1TiaiNow4YdapeK uUtGhhjJeJQN++N4uxz8A== Received: from Engineer1 (208-104-88-189.lnhe.2wcm.comporium.net [208.104.88.189] (may be forged)) by smtprh01.spirittelecom.com (8.13.6/8.13.1) with SMTP id k8RCKKq3000902 for ; Wed, 27 Sep 2006 12:20:21 GMT Message-ID: <002301c6e22f$36f739f0$6405a8c0@cooleygroup.local> From: "Joe Ewen" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Fw: Constant Pressure Differential?? Date: Wed, 27 Sep 2006 08:19:43 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C6E20D.AFA2EBA0" 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: ClamAV 0.88/1947/Wed Sep 27 00:46:56 2006 on smtprh01.spirittelecom.com X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C6E20D.AFA2EBA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed, Thanks, this is useful info. If you decide to change your fuel = regulator, you will have to retune your EC2 (assuming you are using a = EC2.) I have written a program (would still consider it Alpha) that you = can see the fuel map tables and write digital values to each of the = array elements with a PC. I would be happy to trade use of the program = for your looking over my 20B installation so far. In case you don't = recall, I am located near KLKR. Also if you go with an Aeromotive = regulator, it does not come with the AN fittings, they are the o-ring = type. I am using Aeromotive #13109, best price was on Ebay. Best = pricing I found for the fittings was from AmStreetRod.com. Hope this helps, Joe ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Tuesday, September 26, 2006 7:55 PM Subject: [FlyRotary] Fw: Constant Pressure Differential?? 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_0020_01C6E20D.AFA2EBA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
 
Thanks, this is useful info.  If = you decide to=20 change your fuel regulator, you will have to retune your EC2 (assuming = you are=20 using a EC2.)  I have written a program (would still consider it = Alpha)=20 that you can see the fuel map tables and write digital values to each of = the=20 array elements with a PC.  I would be happy to trade use of the = program for=20 your looking over my 20B installation so far.  In case you don't = recall, I=20 am located near KLKR.  Also if you go with an Aeromotive regulator, = it does=20 not come with the AN fittings, they are the o-ring type.  I am = using=20 Aeromotive #13109, best price was on Ebay.  Best pricing I = found for=20 the fittings was from AmStreetRod.com.
 
Hope this helps,
Joe
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Tuesday, September 26, = 2006 7:55=20 PM
Subject: [FlyRotary] Fw: = Constant=20 Pressure Differential??

I thought some of you might be interested in=20 Aeromotive's response to my question about their fuel pressure = regulators -=20 some of which 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=20 negative 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=20 your questions, good luck and thanks for choosing=20 Aeromotive!

 

Brett=20 Clow

Technical=20 Support

Aeromotive, = Inc.

7805 Barton = St.

Lenexa, = KS  66214

913-647-7300 =20 Ext. 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: Constant Pressure=20 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=20 those which described as "vacuum/boost"  will cause the fuel = pressure to=20 vary in 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"=20 indicate that the regulator holds the line fuel pressure constant = until the=20 manifold pressure goes above 30" Hg and then increases it to = compensate for=20 more fuel 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. =20 The engine produces approx 200HP.  Therefore, I need a fuel = pressure=20 regulator which DOES vary line fuel pressure in order to maintain a = constant=20 pressure differential = across the=20 injector at manifold pressures below 30" Hg.  So do all your = manifold=20 referenced fuel pressure regulators do this OR only those which are = referenced=20 to "vacuum" or "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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