Return-Path: <13brv3@bellsouth.net> Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 791936 for flyrotary@lancaironline.net; Sun, 13 Mar 2005 21:41:59 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050314024114.XFVT1995.imf20aec.mail.bellsouth.net@rd> for ; Sun, 13 Mar 2005 21:41:14 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Fuel system pressures Date: Sun, 13 Mar 2005 20:39:15 -0600 Message-ID: <000501c5283f$03790280$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C5280C.B8DE9280" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C5280C.B8DE9280 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable What fuel pressure do you want from the fuel pump to the fuel rails for = a 20B/turbo? I recognize that you need a fuel pressure regulator to = maintain a constant pressure differential for the injectors. The "standard" pressure is 3 bar, or 43.5 psi. Mazda tended to run a = bit lower normally, but not that much, and there's no reason to care unless you're planning to use a stock ECU. With a turbo, you definitely need a regulator that is referenced to manifold pressure, so the difference = between the pressure in the fuel rails, and the pressure in the intake stays the same, regardless of MAP. That can be confusing, so let me know if you = don't follow that. =20 What is the pressure range for the fuel pressure regulator? See above :-) I have taken my fuel system design from Marv You're screwed then... Just kidding :-) Rusty (wishing I had a flying plane again...) ------=_NextPart_000_0006_01C5280C.B8DE9280 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

What fuel pressure do you want from the fuel pump to = the fuel=20 rails for a 20B/turbo? I recognize that you need a fuel pressure = regulator to=20 maintain a constant pressure differential for the injectors.

The = "standard" pressure=20 is 3 bar, or 43.5 psi.  Mazda tended to run a bit lower normally, = but not=20 that much, and there's no reason to care unless you're planning to use a = stock=20 ECU.  With a turbo, you definitely need a regulator that is = referenced to=20 manifold pressure, so the difference between the pressure in the fuel = rails, and=20 the pressure in the intake stays the same, regardless of MAP.  That = can be=20 confusing, so let me know if you don't follow that.   =20

What is the pressure range for the fuel pressure regulator?

See above = :-)

I have=20 taken my fuel system design from Marv

You're screwed then... = Just kidding=20 :-)

Rusty (wishing I had a = flying plane=20 again...)

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