Return-Path: Received: from fed1rmmtao06.cox.net ([68.230.241.33] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 819831 for flyrotary@lancaironline.net; Fri, 25 Mar 2005 01:16:14 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.33; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao06.cox.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with ESMTP id <20050325061528.QOPZ1497.fed1rmmtao06.cox.net@BigAl> for ; Fri, 25 Mar 2005 01:15:28 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] going lean? Date: Thu, 24 Mar 2005 22:15:31 -0800 Message-ID: <000001c53102$0ca431b0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C530BE.FE80F1B0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C530BE.FE80F1B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable John; =20 Four 550's ought to get you over 300 hp with fuel pressure of 43 psi. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Slade Sent: Thursday, March 24, 2005 8:51 PM To: Rotary motors in aircraft Subject: [FlyRotary] going lean? =20 Chrissi (building rotary Cozy IV) just sent me an email that has me wondering. =20 She suggested that I might be going lean at high power because I'm = running 4 * 550 injectors instead of the stock 2 * 550 and 2 * 850. I hit a "brick wall" in the power curve at a certain rpm beyond which I get a "stutter" feeling which listeners on the ground report as a "popping" sound. I've = been thinking this is the edge of detonation and avoiding it. Maybe it is, = but perhaps it's because the injectors have topped out rather than because = of excess boost. =20 Thoughts, anyone? Anyone have a couple of 850 injectors I can try? =20 John (I need more power, Scotty) ------=_NextPart_000_0001_01C530BE.FE80F1B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John;

Four 550’s ought to get you = over 300 hp with fuel pressure of 43 psi.

Al

-----Origi= nal Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Slade
Sent: Thursday, March 24, = 2005 8:51 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = going lean?

Chrissi = (building rotary Cozy IV) just sent me an email that has me wondering.

She suggested = that I might be going lean at high power because I'm running 4 * 550 injectors = instead of the stock 2 * 550 and 2 * 850. I hit a "brick wall" in the = power curve at a certain rpm beyond which I get a "stutter" feeling = which listeners on the ground report as a "popping" sound. I've been thinking this is the edge of detonation and avoiding it. Maybe it is, = but perhaps it's because the injectors have topped out rather than because = of excess boost.

Thoughts, = anyone?

Anyone have a = couple of 850 injectors I can try?

John (I need = more power, Scotty)

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