X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-spurfowl.atl.sa.earthlink.net ([209.86.89.66] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5721033 for flyrotary@lancaironline.net; Mon, 20 Aug 2012 22:00:57 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.66; envelope-from=n360tg@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=DTlLEOvaovoLTdaVQ8Z0S02Yb9gBD4DjUbJtOJe2m4UsuaLVx5ZZmzXFfJ3ncuxb; 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-spurfowl.atl.sa.earthlink.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.67) (envelope-from ) id 1T3dlG-000607-TE for flyrotary@lancaironline.net; Mon, 20 Aug 2012 22:00:07 -0400 From: Thomas Giddings Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-13--12500710 Subject: Re: [FlyRotary] Re: Turbo question. Date: Mon, 20 Aug 2012 22:00:02 -0400 In-Reply-To: To: "Rotary motors in aircraft" References: Message-Id: <6A535941-5CE2-483C-96F7-11F83797335E@earthlink.net> X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 77b0437ff618fec294f5150ab1c16ac0485087bba56e6009a51fcacb8f40d1d9a09ce401eb7b268c350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 198.228.224.230 --Apple-Mail-13--12500710 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Is the waste gate working? KIND REGARDS Thomas Giddings n360tg@earthlink.net 727 858 1772 On Aug 20, 2012, at 9:57 PM, Chris Barber wrote: > I am taking the MP reading from the intake before the injectors but = after the turbo, pop off valve and intercooler, in that order. I only = have a 3 lb spring in the wastegate currently to control boost. Since I = had a detonation issue a while back requiring a teardown to replace apex = seals, likely due to too low of octane fuel, I wanted to start with just = a little boost at first.=20 >=20 >=20 >=20 > Sent from my iPhone 4 >=20 > On Aug 20, 2012, at 8:42 PM, "Ed Anderson" = wrote: >=20 >> 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 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html --Apple-Mail-13--12500710 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Is = the waste gate working?

KIND = REGARDS
Thomas Giddings
72= 7 858 1772



On Aug 20, 2012, at 9:57 PM, Chris Barber wrote:

I am = taking the MP reading from the intake before the injectors but after the = turbo, pop off valve and intercooler, in that order. I only have a 3 lb = spring in the wastegate currently to control boost. Since I had a = detonation issue a while back requiring a teardown to replace apex = seals, likely due to too low of octane fuel, I wanted to start with just = a little boost at first.



Sent from my iPhone 4

On = Aug 20, 2012, at 8:42 PM, "Ed Anderson" <eanderson@carolina.rr.com>= ; 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>


-----
No virus found in this = message.
Checked by AVG - www.avg.com
<= blockquote type=3D"cite">
Version: 2012.0.2197 = / Virus Database: 2437/5211 - Release Date: = 08/20/12


--
Homepage: =  http://www.flyrotary.com/
Archive and UnSub:   http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html
<= br>--
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Archiv= e and UnSub:   http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html

= --Apple-Mail-13--12500710--