Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568623 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 12:07:24 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao01.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041215170654.TRQQ5137.fed1rmmtao01.cox.net@BigAl> for ; Wed, 15 Dec 2004 12:06:54 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Injectors Date: Wed, 15 Dec 2004 09:07:09 -0800 Message-ID: <000501c4e2c8$831032f0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C4E285.74ECF2F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C4E285.74ECF2F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: Injectors =20 Using the 440cc injectors may help; but I don't think there is any = assurance that they will work well. Didn't Rusty try this?=20 =20 I don't remember it, but he may have.=20 =20 =20 Yes, I tried the 440/460 injectors, and didn't see any improvement in = idle. If I'm not mistaken, Mazda rated these injectors at a lower than = standard pressure. For the guys who've had theirs tested, didn't they flow over = 500 at standard pressure? For some reason, I'm thinking that the 550's were rated at normal pressure, and RC Engineering tested 4 of mine with = results between 549 and 551. My thinking is that there isn't much difference between the stock injectors. =20 Mine tested at 570cc at 43 psi. =20 For idle, response time is more important, and I've always wondered if = the difference wasn't between using high and low impedance injectors. We put as scope on an injector lead a couple days ago. We're talking = pulses on the order of a milisec at low power. I'd say those stock injectors = just can't react properly. =20 Al ------=_NextPart_000_0006_01C4E285.74ECF2F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Subject: [FlyRotary] Re: Injectors

 

Using the 440cc injectors may help; but I don’t think there is any = assurance that they will work well.  Didn’t Rusty try = this? 

 

 I don't remember it, but he may have. 

 

 

Yes, I tried the 440/460 injectors, and didn't see any improvement in = idle.  If I'm not mistaken, Mazda rated these injectors at a lower than standard pressure.  For the guys who've had theirs tested, didn't they flow = over 500 at standard pressure?  For some reason, I'm thinking that the = 550's were rated at normal pressure, and RC Engineering tested 4 of = mine with results between 549 and 551.  My thinking is that there isn't much difference between the stock injectors.

 

Mine tested at 570cc at 43 = psi.

 

For idle, = response time is more important, and I've always wondered if the difference wasn't = between using high and low impedance injectors.

We put as scope on an injector = lead a couple days ago.  We’re talking pulses on the order of a = milisec at low power. I’d say those stock injectors just can’t react = properly.

 

Al

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