X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail14.syd.optusnet.com.au ([211.29.132.195] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTPS id 2434781 for flyrotary@lancaironline.net; Fri, 26 Oct 2007 17:59:05 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.195; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-147-184.dsl.nsw.optusnet.com.au [58.105.147.184]) by mail14.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id l9QLwIrg004247 for ; Sat, 27 Oct 2007 07:58:19 +1000 Message-ID: <004101c8181b$534f03d0$b893693a@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: MAP port location Date: Sat, 27 Oct 2007 07:58:20 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003E_01C8186F.244383A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_003E_01C8186F.244383A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bobby, I've heard that if your using Tracy's EMS that the pressure wave in the = runners is too dynamic to get a proper MAP reading. I believe Tracy has = his pick-up in the plenum, for the reasons Ed suggests. I believe that's = the reason PL couldn't get the EMS to run on his slide throttle = experiment on the dyno. George (down under) Ed, The ports in the renesis lower manifold are at the primary and = secondary runner join. The stock upper renesis manifold also has other = ports as well. Not sure what they are for in the car. I need to get the = shop manual out and do a little research. Bobby -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Ed Anderson Sent: Friday, October 26, 2007 3:18 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: MAP port location It'll work just about at any location. But, you generally want a = location that will reflect the total engine condition rather than say = one runner. Besides there are some fairly substantial pulsation in the = runners. I prefer to have the sensor in the plenum immediately after = the throttle body, but out of the way of the air flow at this point the = pressure changes in your plenum probably reflect the over all (average) = of what is going on in your runners. The pressure wave travels at the = speed of sound whereas the air mass travels less than 400 ft/sec (much = less in most cases), so where ever you put the sensor - even down my the = ports, it won't matter timing wise.=20 However, a location where the pulsation are damped is where I would = put it. In the plenum after the throttle body and out of the direct air = flow path. On the other hand, I have used the ports on the stock lower = manifold (tying together the primary and secondary ports with a "T" so = as to better get an average). =20 Some folks have used a dense air filter/fuel filter? to damp out the = pulsation, so if you are going to run your manifold like off a tube near = a port, that is what I would try as well. Ed Ed ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Friday, October 26, 2007 10:49 AM Subject: [FlyRotary] MAP port location What is the best location for MAP ports on the intake. Close to the = engine or further away? I have the modified Renesis lower manifold that = has two ports installed. Are these the best locations for the EC2 or = should I place new ones further back in the upper manifold? Thanks, Bobby J Hughes -------------------------------------------------------------------------= --- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition.=20 Version: 7.5.503 / Virus Database: 269.15.11/1093 - Release Date: = 25/10/2007 5:38 PM ------=_NextPart_000_003E_01C8186F.244383A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bobby,
I've heard that if your using Tracy's = EMS that the=20 pressure wave in the runners is too dynamic to get a proper MAP reading. = I=20 believe Tracy has his pick-up in the plenum, for the reasons Ed = suggests. I=20 believe that's the reason PL couldn't get the EMS to run on his=20 slide throttle experiment on the dyno.
George (down under)
 
Ed,
 
The ports in the renesis lower manifold are = at the=20 primary and secondary runner join. The stock upper renesis manifold = also has=20 other ports as well. Not sure what they are for in the car. I need to = get the=20 shop manual out and do a little research.
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Friday, October 26, 2007 3:18 = PM
To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: MAP port=20 location

It'll work just about at any location.  = But, you=20 generally want a location that will reflect the total engine condition = rather=20 than say one runner.  Besides there are some fairly substantial = pulsation=20 in the runners.  I prefer to have the sensor in the plenum = immediately=20 after the throttle body, but out of the way of the air flow at this = point the=20 pressure changes in your plenum probably reflect the over all = (average) of=20 what is going on in your runners.  The pressure wave travels at = the speed=20 of sound whereas the air mass travels less than 400 ft/sec (much less = in most=20 cases), so where ever you put the sensor - even down my the ports, it = won't=20 matter timing wise.
 
However, a location where the pulsation are = damped is=20 where I would put it.  In the plenum after the throttle body and = out of=20 the direct air flow path.  On the other hand, I have used the = ports on=20 the stock lower manifold (tying together the primary and secondary = ports with=20 a "T" so as to better get an average). 
 
Some folks have used a dense air filter/fuel = filter? to=20 damp out the pulsation, so if you are going to run your manifold like = off a=20 tube near a port, that is what I would try as well.
 
Ed
 
 Ed
 
 
 ----- Original Message ----- =
From:=20 Bobby = J. Hughes=20
To: Rotary motors in = aircraft=20
Sent: Friday, October 26, = 2007 10:49=20 AM
Subject: [FlyRotary] MAP port = location

What is the best location for MAP ports = on the=20 intake. Close to the engine or further away? I have the modified = Renesis=20 lower manifold that has two ports installed. Are these the best=20 locations for the EC2 or = should I=20 place new ones further back in the upper = manifold?
 
Thanks,
 
 
Bobby J=20 Hughes
 

--
Homepage:  http://www.flyrotary.com/
Archi= ve=20 and UnSub:  =20 = http://mail.lancaironline.net:81/lists/flyrotary/List.html

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.503 / Virus Database: 269.15.11/1093 - = Release Date:=20 25/10/2007 5:38 PM
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