Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2561227 for flyrotary@lancaironline.net; Thu, 28 Aug 2003 21:19:57 -0400 Received: from rad ([68.212.14.21]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030829011955.LFWV1849.imf22aec.mail.bellsouth.net@rad> for ; Thu, 28 Aug 2003 21:19:55 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: MSD injector test results Date: Thu, 28 Aug 2003 20:19:56 -0500 Message-ID: <000001c36dcb$a875d8b0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C36DA1.BF9FD0B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C36DA1.BF9FD0B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Be 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 =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 =20 Hi Ed, =20 Thanks for the test offer. I have to admit that you lost me with your reasoning for leaving the B controller at the default. I can't leave = the B controller at the default, because it's too rich to run below about 15" = MAP. I also adjust the program value to leave the manual mixture knob at = 12:00. At this setting, when I turn off the primaries (MSD's) around idle, I = have to turn the mixture knob all the way down, and it's still a little too = rich running on the Mazda 550's. =20 =20 Since you have matching injectors, you would expect to be able to turn = off the primaries, and have the secondaries run at the same mixture setting. = In the past, you've mentioned that you have to enrichen the mixture before turning off the primaries, or the engine wants to lean out and die. The question is- do you have to leave the mixture richer than 12:00, or can = you turn it back to 12:00 and still run fine on the secondaries alone?=20 =20 Tracy, is this a valid test? In other words, do the primaries and secondaries get the exact same pulse width when running by themselves = below the staging point? =20 =20 Thanks, Rusty=20 ------=_NextPart_000_0001_01C36DA1.BF9FD0B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Be happy to, I won't = be able to do=20 it until Saturday, but will be out at the airport then.  However, I = would=20 suggest that we use the default MAP setting that Tracy ships the unit=20 with.  I keep my "B" controller set at his default. The reason is - = I can=20 have my manual mixture control index postioned at where ever I = want  -=20 by adjusting the program value.  If optimum finds my manual knob = set at=20 10:00 then I lean the program setting until I get optium at=20 12:00.  If at 2:00 then I enrichen the program MAP until I can set = the=20 manual knob to 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
 
Hi=20 Ed,
 
Thanks for=20 the test offer.  I have to admit that you lost me with your = reasoning for=20 leaving the B controller at the default.  I can't leave the B = controller at=20 the default, because it's too rich to run below about 15" = MAP.   I=20 also adjust the program value to leave the manual mixture knob at = 12:00. =20 At this setting, when I turn off the primaries (MSD's) around idle, I = have to=20 turn the mixture knob all the way down, and it's still a little too rich = running=20 on the Mazda 550's. 
 
Since you=20 have matching injectors, you would expect to be able to turn off the = primaries,=20 and have the secondaries run at the same mixture setting.  In the = past,=20 you've mentioned that you have to enrichen the mixture before turning = off the=20 primaries, or the engine wants to lean out and die.  The question = is- do=20 you have to leave the mixture richer than 12:00, or can you turn it back = to=20 12:00 and still run fine on the secondaries = alone? 
 
Tracy, is=20 this a valid test?  In other words, do the primaries and = secondaries get=20 the exact same pulse width when running by themselves below the = staging=20 point?  
 
Thanks,
Rusty 
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