X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5721010 for flyrotary@lancaironline.net; Mon, 20 Aug 2012 21:52:47 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=n360tg@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=GNKBoy1CMMhodYtM8Ycwacg8LNDi3XLfR987PjO+D9dsfv2oOrk6ieviKmgy0Lrz; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [198.228.224.230] (helo=[172.20.10.2]) by elasmtp-kukur.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1T3dda-0007Xs-5W for flyrotary@lancaironline.net; Mon, 20 Aug 2012 21:52:10 -0400 From: Thomas Giddings Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-11--12980103 Subject: Re: [FlyRotary] Re: Turbo question. Date: Mon, 20 Aug 2012 21:52:03 -0400 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 77b0437ff618fec294f5150ab1c16ac0485087bba56e600948c8ae69ae3a748f6e7e5b03a4c6b2e0350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 198.228.224.230 --Apple-Mail-11--12980103 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Chris: I think Ed has hit on what I would have suggested. The tip off is = the higher static RPM you recored with the turbo removed. 29.8 is normal = MP with a NA engine. Are you sure the Turbo is spinning up? If it is not = that would be your restriction and hence lower MP and Static RPM. Can = you manually spin with your finger. It should turn very easy(as I am = sure you know). If that is the case you are in for a rocket ship ride = when you get the turbo working:) KIND REGARDS Thomas Giddings n360tg@earthlink.net 727 858 1772 On Aug 20, 2012, at 9:42 PM, Ed Anderson wrote: > Chris, >=20 > Exactly where are you taking your manifold pressure from- >=20 > I presume it is after the turbocharger compressor - somewhere between = the turbo and the intake manifold OR at the manifold. >=20 > The only way I can make sense of your reading based on information = provided thus far is that you are taking your manifold pressure reading = before the turbocharger compressor inlet. Then the increased airflow = caused by the turbocharger could cause the pressure drop before the = compressor due to filter or other restriction. >=20 > Even if you have a restrictive filter, the pressure on the compressor = outlet side of the turbo, the turbocharger on pressure in your manifold = should be higher than without the turbo. >=20 > You are not spinning your turbo backwards are you?{:>) >=20 > Ed > -------------------------------------------------- > From: "Chris Barber" > Sent: Monday, August 20, 2012 9:17 PM > To: "Rotary motors in aircraft" > Subject: [FlyRotary] Turbo question. >=20 >> As I have mentioned I have had what I think are incongruent readings = regarding my manifold pressure (mp)and engine rpm. It seems I am getting = quite low mp as I add power to higher rpm. >>=20 >> I am not well versed in this area but my thought is that as I add = power, even with slight boost (currently using a 3 lb spring in my = wastegate) eventually my mp should raise a bit more. >>=20 >> Today I did some static test. I recorded engine RPM with the turbo = hooked up and recorded the mp at 1000 rpm increments. Then I removed the = turbo plumbing from my intake and recorded the same info My results = currently confuse me. >>=20 >> With the turbo hooked up I am getting >>=20 >> RPM. MP inches >> 2000 - 14.0 >> 3000 - 15.5 >> 4000 - 19.3 >> 5000 - 21.6 >> 5700 - 24.5 (topped out) >>=20 >> With the turbo removed. >>=20 >> 2000 - 15.8 >> 3000 - 15.3 >> 4000 - 19.7 >> 5000 - 24.8 >> 5833 - 29.8 >>=20 >> Is this indicative of restriction in my plumbing? Perhaps in the = inter cooler? A dirty air filter? A bad pop off valve or a leak not = allowing the air pressure getting to the intake. Or???? >>=20 >> I am uncertain what other permitters I need to check and provide. I = am just starting my diagnosis in my Phase One testing. I only have 1.6 = hours in the air so far. I value ya'll's direction and input. >>=20 >> Heck, perhaps this is working properly but it just doesn't seem = right/comfortable. >>=20 >> Thanks folks. >>=20 >> Chris Barber >> Houston >> Velocity SE >> Rotary 13b turbo (?) :-) >>=20 >>=20 >>=20 >> Sent from my iPhone 4 >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html >>=20 >>=20 >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2197 / Virus Database: 2437/5211 - Release Date: = 08/20/12 >>=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html --Apple-Mail-11--12980103 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii
KIND = REGARDS
Thomas Giddings
72= 7 858 1772



On Aug 20, 2012, at 9:42 PM, Ed Anderson wrote:

Chris,

Exactly where are you taking your = manifold pressure from-

I presume it is after the turbocharger = compressor - somewhere  between the turbo and the intake manifold = OR  at the manifold.

The only way I can make sense of your = reading based on information provided thus far is that you are taking = your manifold pressure reading before the turbocharger compressor inlet. =  Then the increased airflow caused by the turbocharger could cause = the pressure drop before the compressor due to filter or other = restriction.

Even if you have a restrictive filter, the pressure = on the compressor outlet side of the turbo, the turbocharger on pressure = in your manifold should be higher than without the turbo.

You are = not spinning your turbo backwards are = you?{:>)

Ed
-------------------------------------------------= -
From: "Chris Barber" <cbarber@texasattorney.net>= ;
Sent: Monday, August 20, 2012 9:17 PM
To: "Rotary motors in = aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Turbo question.

As I have mentioned I have had what I think are = incongruent readings regarding my manifold pressure (mp)and engine rpm. = It seems I am getting quite low mp as I add power to higher = rpm.

I am not well = versed in this area but my thought is that as I add power, even with = slight boost (currently using a 3 lb spring in my wastegate) eventually = my mp should raise a bit more.

Today I did = some static test. I recorded engine RPM with the  turbo hooked up = and recorded the mp at 1000 rpm increments. Then I removed the turbo = plumbing from my intake and recorded the same info My results currently = confuse me.

With the turbo = hooked up I am getting

RPM. =   MP inches
2000 - = 14.0
3000 - = 15.5
4000 - = 19.3
5000 - = 21.6
5700 - 24.5 (topped = out)

With the turbo = removed.

2000 - = 15.8
3000 - = 15.3
4000 - = 19.7
5000 - = 24.8
5833 - = 29.8

Is this = indicative of restriction in my plumbing? Perhaps in the inter cooler? A = dirty air filter? A bad pop off valve or a leak not allowing the air = pressure getting to the intake. Or????

I am uncertain = what other permitters I need to check and provide. I am just starting my = diagnosis in my Phase One testing. I only have 1.6 hours in the air so = far. I value ya'll's direction and input.

Heck, perhaps = this is working properly but it just doesn't seem = right/comfortable.

Thanks = folks.

Chris = Barber
Houston
Velocity = SE
Rotary 13b turbo (?) = :-)



Sent from my = iPhone 4
--
Homepage: =  http://www.flyrotary.com/
Archive and UnSub: http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html
<= blockquote type=3D"cite">

-----
No virus = found in this message.
Checked = by AVG - www.avg.com
Version: 2012.0.2197 / Virus Database: 2437/5211 - Release = Date: 08/20/12


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