X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 29 Sep 2006 09:53:02 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m24.mx.aol.com ([64.12.137.5] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1425128 for lml@lancaironline.net; Thu, 28 Sep 2006 17:53:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.5; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m24.mx.aol.com (mail_out_v38_r7.6.) id q.c64.10b04a2 (29672) for ; Thu, 28 Sep 2006 17:53:09 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Thu, 28 Sep 2006 17:53:09 EDT Subject: Re: [LML] L 360 Back Up Fuel Pump Options X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1159480389" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1159480389 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/28/2006 2:43:46 P.M. Central Standard Time, LHenney@charter.net writes: I have a friend (Gene Vincent) putting a 360 on his LNC2. He has purchased the Superior XP 360 and is discussing the fuel system. The Dukes pump is now $750. Is anyone using one of the Hot Rod pumps as a back up electric fuel pump? Also, did you plumb a by-pass and why? What spec's did you try to achieve? Any thoughts on a proper installation of a little more affordable backup pump would be appreciated. Larry, Some have used Facet pumps. No bypass is needed if the pump is flow-thru like the Duke pump - i.e. the engine pump has no trouble pulling fuel thru the "backup" pump located betwixt the gascolator/filter and the engine pump. If injected, the throttle body should have pressure range specs. I.E. My Lyc I/O 320 engine with a Bendix RSA system requires the pressure to be maintained above 12 psi and not exceed a max of 45 psi at the throttle body. Generally, my engine pump delivers 26 psi and the boost pump might add just 2 psi on top of that - that is the boost pump is regulated to produce about 28 psi whether fuel is flowing or the mixture control is at idle-cutoff. If carbureted, an O-320 wants to see no more than 8 psi at the carb, with a minimum of .5 psi and a desired pressure of 3 psi. This is information from the Lycoming engine manual - surely Superior has one available. Note that with a header tank, the backup pump is only pushing the fuel (0 head), not pulling it up from the basement (wings), too. Uh, which side of the firewall? Its hot fwd. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) A man has got to know his limitations. -------------------------------1159480389 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 9/28/2006 2:43:46 P.M. Central Standard Time,=20 LHenney@charter.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

I have a= friend=20 (Gene Vincent) putting a 360 on his LNC2. He has purchased the Super= ior=20 XP 360 and is discussing the fuel system. The Dukes pump is now=20 $750. Is anyone using one of the Hot Rod pumps as a back up=20 electric fuel pump? Also, did you plumb a by-pass and why? What spec= 's=20 did you try to achieve?

Any thou= ghts on a=20 proper installation of a little more affordable backup pump would be=20 appreciated.

Larry,

Some have used Facet pumps.

No bypass is needed if the pump is flow-thru like the Duke pump - i.e.=20= the=20 engine pump has no trouble pulling fuel thru the "backup" pump located betwi= xt=20 the gascolator/filter and the engine pump.

If injected, the throttle body should have pressure range specs. =20 I.E. My Lyc I/O 320 engine with a Bendix RSA system requires the=20 pressure to be maintained above 12 psi and not exceed a max o= f 45=20 psi at the throttle body. Generally, my engine pump delivers= 26=20 psi and the boost pump might add just 2 psi on top of that - that is the boo= st=20 pump is regulated to produce about 28 psi whether fuel is flowing or th= e=20 mixture control is at idle-cutoff.

If carbureted, an O-320 wants to see no more than 8 psi at the carb, wi= th a=20 minimum of .5 psi and a desired pressure of 3 psi.

This is information from the Lycoming engine manual - surely Superior h= as=20 one available.

Note that with a header tank, the backup pump is only pushing the fuel=20= (0=20 head), not pulling it up from the basement (wings), too.

Uh, which side of the firewall? Its hot fwd.=20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

A m= an=20 has got to know his limitations.

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