X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.143] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 989798 for flyrotary@lancaironline.net; Thu, 09 Jun 2005 08:29:58 -0400 Received-SPF: none receiver=logan.com; client-ip=129.116.87.143; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C56CEE.D78A0114" Subject: RE: [FlyRotary] Re: Very strange problem after installing new turbo Date: Thu, 9 Jun 2005 07:29:12 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E016C19DE@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Very strange problem after installing new turbo Thread-Index: AcVssIG++ymbb1vlTnKrrPSY8ed8WQAPh8kQ From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C56CEE.D78A0114 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dave,=20 Why not go ahead and replace the plugs and eliminate that as a possible cause? They are nearing the end of their useful life anyway. =20 Mark S. =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard Sent: Thursday, June 09, 2005 12:02 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Very strange problem after installing new turbo =20 =20 On 6/8/05, David Staten wrote:=20 Is the fuel pump capable of supporting the needed pressure ABOVE the boost level? Perhaps this is a fuel pressure induced sag caused by too little "RELATIVE" pressure above the deck pressure.=20 =20 Just speculation, not based on experience Dave =20 Another good guess. Yes, very capable. I demonstrated that to my self back when my fuel pressure gauge was working properly they could support in excess of 80 PSI with adequate flow. During the test today I tried running just the 2nd pump, then both together. No change.=20 =20 Also, worked well in the past with the other turbo pulling 38-40"MAP. =20 The more I think about, the detonation issue because of the advanced timing is starting to make some sense. Will go retard the timing and see what I get. =20 --=20 Dave Leonard (feeling a little retarded myself) Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/vp4skydoc/index.html=20 ------_=_NextPart_001_01C56CEE.D78A0114 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dave,

Why not go ahead and replace the = plugs and eliminate that as a possible cause?  They are nearing the end of = their useful life anyway.

 

Mark S.  =

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard
Sent: Thursday, June 09, = 2005 12:02 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Very strange problem after installing new turbo

 

 

On 6/8/05, David Staten <Dastaten@earthlink.net> wrote:

Is the fuel pump capable of supporting the needed pressure ABOVE = the boost level? Perhaps this is a fuel pressure induced sag caused by too = little "RELATIVE" pressure above the deck pressure.
 
Just speculation, not based on experience
Dave

 

Another good guess.  Yes, very capable.  I = demonstrated that to my self back when my fuel pressure gauge was working properly they = could support in excess of 80 PSI with adequate flow.  During the test = today I tried running just the 2nd pump, then both together.  No change. =

 

Also, worked well in the past with the other turbo pulling 38-40"MAP.

 

The more I think about, the detonation issue because of the = advanced timing is starting to make some sense.  Will go retard the timing = and see what I get.

 

--
Dave Leonard (feeling a little retarded myself)
Turbo Rotary RV-6 N4VY
http://memb= ers.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.c= om/vp4skydoc/index.html

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