Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.93.67.83] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2561160 for flyrotary@lancaironline.net; Thu, 28 Aug 2003 19:23:03 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-02.southeast.rr.com (8.12.5/8.12.2) with SMTP id h7SNJPCK009998 for ; Thu, 28 Aug 2003 19:19:26 -0400 (EDT) Message-ID: <003d01c36dbb$1e37ef40$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: MSD injector test results Date: Thu, 28 Aug 2003 19:21:32 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003A_01C36D99.96EACCE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_003A_01C36D99.96EACCE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageBe happy to, I won't be able to do it until Saturday, but will be = out at the airport then. However, I would suggest that we use the = default MAP setting that Tracy ships the unit with. I keep my "B" = controller set at his default. The reason is - I can have my manual = mixture control index postioned at where ever I want - by adjusting the = program value. If optimum finds my manual knob set at 10:00 then I lean = the program setting until I get optium at 12:00. If at 2:00 then I = enrichen the program MAP until I can set the manual knob to 12:00 =20 I normally program the controller such that my arrow on my manuel = mixture control points at 12:00. I am using the stock 460 cc/min low impedance Mazda Injectors Ed ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Thursday, August 28, 2003 2:35 PM Subject: [FlyRotary] Re: MSD injector test results If you guys (Ed and Al) don't mind, I'd like to propose a test. At = your convenience, and I'm not kidding- don't make any special trips, or = go to any real effort. Could each of you run at low power, below the = staging point, maybe 1500 rpm, and enable only one set of injectors at a = time. I'd be interested to see what position on the mixture knob you = have to use for each set. On mine, I have to turn the mixture knob to = about 9:00 for the Mazda 550's, and about 3:00 for the MSD's. =20 The test will be interesting, since (as I recall) Al has Mazda 550's = as primaries, and also has the same MSD's that flow about 500 as = secondaries. I can't recall if I've ever seen the physical layout of = these though. Are they all the same distance from the rotors? Sorry, it will be months yet until my engine runs again. It ran on = the dyno, now waiting to run on the airplane. RC Engineering measured 570 cc/min on my Mazda injectors that I used = as primaries. I have no measurements on the MSD 2013s. You can see on = the attached photo the 570s are in the rotor housings and the 2013s are = out in the TB. =20 I'm not surprised at your mixture knob settings. Mine were even more = extreme. I don't recall ever running on the MSDs only below the staging = point. For the 570s I had to turn the mixture knob as far as it would = go to get enough correction at idle, and then it may still have been a = bit rich. But I was running with a constant pressure fuel regulator at = 40 psi. I've changed to a MAP referenced regulator, and I'm planning on = switching the wiring to run the MSDs as the primaries (if my wiring = harness allows; I have completely separate wiring to the two sets coming = from different sides). BTW; a plug for TWM Induction. I returned my constant pressure = regulator and they very promptly swapped my old fittings into a new MAP = referenced body and returned it to me - NO charge. A bright spot in my = day. Al -------------------------------------------------------------------------= ----- >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_003A_01C36D99.96EACCE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Be happy to, I won't be able to do it = until=20 Saturday, but will be out at the airport then.  However, I would = suggest=20 that we use the default MAP setting that Tracy ships the unit = with.  I keep=20 my "B" controller set at his default. The reason is - I can have my = manual=20 mixture control index postioned at where ever I want  - by = adjusting=20 the program value.  If optimum finds my manual knob set at 10:00 = then=20 I lean the program setting until I get optium at 12:00.  = If at=20 2:00 then I enrichen the program MAP until I can set the manual knob to=20 12:00 
 
I normally program the controller such = that my=20 arrow on my manuel mixture control points at 12:00.
I am using the stock 460 cc/min low = impedance Mazda=20 Injectors
 
Ed
 
----- Original Message -----
From:=20 Al = Gietzen=20
Sent: Thursday, August 28, 2003 = 2:35=20 PM
Subject: [FlyRotary] Re: MSD = injector=20 test results

If you guys (Ed and Al) = don't=20 mind, I'd like to propose a test.  At your convenience, and = I'm not=20 kidding- don't make any special trips, or go to any real effort.  = Could=20 each of you run at low power, below the staging point, maybe 1500 rpm, = and=20 enable only one set of injectors at a time.  I'd be = interested to=20 see what position on the mixture knob you have to use for each = set.  On=20 mine, I have to turn the mixture knob to about 9:00 for the Mazda 550's, = and about=20 3:00 for the MSD's.  =  

 

The test will be = interesting,=20 since (as I recall) Al has Mazda 550's as primaries, and also has = the=20 same MSD's that flow about 500 as secondaries.  I can't recall if = I've=20 ever seen the physical layout of these though.  Are they all = the=20 same distance from the rotors?

 

 

Sorry, it = will be=20 months yet until my engine runs again.  It ran on the dyno, now = waiting=20 to run on the airplane.

 

RC = Engineering=20 measured 570 cc/min on my Mazda injectors that I used as = primaries.  I=20 have no measurements on the MSD 2013s.  You can see on the = attached photo=20 the 570s are in the rotor housings and the 2013s are out in the TB.=20  

 

I=92m not = surprised=20 at your mixture knob settings.  Mine were even more = extreme.  I=20 don=92t recall ever running on the MSDs only below the staging point. =  For=20 the 570s I had to turn the mixture knob as far as it would go to get = enough=20 correction at idle, and then it may still have been a bit rich.  = But I=20 was running with a constant pressure fuel regulator at 40=20 psi.

 

I=92ve = changed to a=20 MAP referenced regulator, and I=92m planning on switching the wiring = to run the=20 MSDs as the primaries (if my wiring harness allows; I have completely = separate=20 wiring to the two sets coming from different sides).

 

BTW; a = plug for TWM=20 Induction.  I returned my constant pressure regulator and they = very=20 promptly swapped my old fittings into a new MAP referenced body and = returned=20 it to me =96 NO charge.  A bright spot in my = day.

 

Al

 

>>  Homepage: =20 http://www.flyrotary.com/
>>  Archive:  =20 = http://lancaironline.net/lists/flyrotary/List.html
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