Return-Path: Received: from [65.54.169.61] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 451113 for flyrotary@lancaironline.net; Sun, 03 Oct 2004 09:33:45 -0400 Received-SPF: none receiver=logan.com; client-ip=65.54.169.61; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 3 Oct 2004 06:22:00 -0700 Received: from 65.54.98.156 by bay3-dav31.bay3.hotmail.com with DAV; Sun, 03 Oct 2004 13:21:50 +0000 X-Originating-IP: [65.54.98.156] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: MAP pulses (20B) Date: Sun, 3 Oct 2004 09:20:41 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01C4A92A.40DDBA10" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0006.2205 Seal-Send-Time: Sun, 3 Oct 2004 09:20:41 -0400 Message-ID: X-OriginalArrivalTime: 03 Oct 2004 13:22:00.0469 (UTC) FILETIME=[F6FDDC50:01C4A94B] This is a multi-part message in MIME format. ------=_NextPart_000_0045_01C4A92A.40DDBA10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Sunday, October 03, 2004 1:38 AM Subject: [FlyRotary] Re: MAP pulses (20B) What surprised me was that with the engine running at 2000, the = pointer was swinging very rapidly over a range of over a pretty wide = range; from about 27 to 37 psi. It is an undamped bourdon-tube gauge, = responding to a lot of pulsing. I had no pulse filtering between the = manifold and the fuel pressure regulator.=20 Was the engine running smoothly at 2000? Did all the improvements you = made actually allow you to run a smooth idle down around 1000 or so?=20 Yes it was; so I can't say the pulsing in the fuel pressure was = interfering with the operation at lower rpm; it was, at the least, = indicative of uneven MAP and likely very hard on the FP regulator. I = haven't run lower than about 1500 yet since that is where the idle stop = is set; and I am pursuing other issues. But it does now run smoothly at = that speed - secondary injectors only. The other issues are that the = "staging" is not working; it does not run completely smoothly with both = sets on; less smooth on primary only; and very smooth with secondary = only (primary turned off). If you can figure those things out for me, = you win the cigar. Still waiting on a new chip for the EM2, but the = next time I run I'll slow it down further.=20 Al Hi Al, Got your new chip made and will ship it on the next canoe trip = from Shady Bend. =20 Tracy (Island life sucks) ------=_NextPart_000_0045_01C4A92A.40DDBA10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From: Al Gietzen
To: Rotary motors in = aircraft
Sent: Sunday, October 03, 2004 = 1:38=20 AM
Subject: [FlyRotary] Re: MAP = pulses=20 (20B)

What=20 surprised me was that with the engine running at 2000, the pointer was = swinging very rapidly over a range of over a pretty wide range; from = about 27=20 to 37 psi.  It is an undamped bourdon-tube gauge, responding to a = lot of=20 pulsing.  I had no pulse filtering between the manifold and the = fuel=20 pressure regulator.

Was the = engine=20 running smoothly at 2000?  Did all the improvements you made = actually=20 allow you to run a smooth idle down around 1000 or = so? 

Yes it = was; so I=20 can=92t say the pulsing in the fuel pressure was interfering with the = operation=20 at lower rpm; it was, at the least, indicative of uneven MAP and = likely very=20 hard on the FP regulator.  I haven=92t run lower than about 1500 = yet since=20 that is where the idle stop is set; and I am pursuing other issues. = But it=20 does now run smoothly at that speed =96 secondary injectors = only.  The=20 other issues are that the =93staging=94 is not working; it does not = run completely=20 smoothly with both sets on; less smooth on primary only; and very = smooth with=20 secondary only (primary turned off).  If you can figure those = things out=20 for me, you win the cigar.  Still waiting on a new chip for the = EM2, but=20 the next time I run I=92ll slow it down further.

Al

Hi = Al,  Got your=20 new chip made and will ship it on the next canoe trip from Shady=20 Bend. 

Tracy  = (Island=20 life sucks)

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