X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0c4) with ESMTP id 764793 for flyrotary@lancaironline.net; Fri, 14 Oct 2005 12:39:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-025-165.carolina.res.rr.com [24.74.25.165]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j9EGcKfV022825 for ; Fri, 14 Oct 2005 12:38:22 -0400 (EDT) Message-ID: <001701c5d0dd$b1520720$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: injector size Date: Fri, 14 Oct 2005 12:38:22 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit 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-Virus-Scanned: Symantec AntiVirus Scan Engine Well,Buly, I don't have an EM2. However, I found out early-on that the EC2 had a "sneak-circuit" that permitted power from the injector harness to leak power the CPUs. In other words, I expected that when I turned the power to the Ec2 CPU (I forget the pins at the moment) OFF I expected the unit to be off. So much to my surprise, on my first run with the EC2 I killed the power ( I thought) by turning off the EC2 CPU power switch, but, the engine just kept right on running. So I have to turn off my injectors to kill the engine. Tracy explained that he thought most folks would kill the engine (and all power) by turning off the Master switch - which works just fine. Except, I don't want a knee bumping the master switch to kill my engine at an inopportune time {:>), so I had a separate toggle (away from the knee) to turn on power to the EC2 (which of course did not work as I intended). So, I don't know - but I suspect there may be a similar thing ("sneak circuit') happening with the EM2 in that the EC2 is providing some voltage with the primaries on. However, only Tracy can answer for certain. Ed ----- Original Message ----- From: "Bulent Aliev" To: "Rotary motors in aircraft" Sent: Friday, October 14, 2005 12:07 PM Subject: [FlyRotary] Re: injector size > Hi Ed, > I discovered last night that there is a mystery related to my primary > injector switch: with only the master on, I turn the primary injector > switch on, and the EM display comes on with 6.5V "low voltage" > reading. I have to find out how the injector cirquit can feed power > to the EM? > Any ideas? > Buly > On Oct 11, 2005, at 4:47 PM, Ed Anderson wrote: > >> Buly, Something you might try is setting the staging manifold >> pressure point at a higher manifold pressure. That way your 550c >> primary should be the only ones on at low and even medium rpms and >> since the Ec2 appears to work fine with 550s out of the box, this >> might help. Since you have already gone the mode 3 route, this is >> the only thing I can think of. >> >> I believe the problem is that upon initial start, the EC2 sees >> ambient pressure in the manifold (30"Hg) and thinks the engine is >> wide open throttle, it checks the fuel map for the amount of fuel >> to inject for MAP = 30"Hg and injects fuel (a lot!) accordingly. >> Normally, this is not a problem as the engine immediately starts >> and sucks the manifold pressure down to the nominal 12-14" Hg (for >> idle) and the fuel injected is adjust accordingly AND the secondary >> are turned off (until the manifold pressure again rises to the >> staging point), but with your big injectors having all four dump >> fuel before the engine is started and running is probably >> contributing to the problem. >> >> Do you have switches on your injectors and have you tried starting >> with the secondary injectors turned off?? >> >> I presume you don't have the cold start turned on (accidentally or >> otherwise -shorted). >> >> I presume you have programmed a lean mixture for start up region . >> >> Ed A >> >> >> >> ----- Original Message ----- From: "Bulent Aliev" >> >> To: "Rotary motors in aircraft" >> Sent: Tuesday, October 11, 2005 4:15 PM >> Subject: [FlyRotary] injector size >> >> >> >>> Hi Guys, >>> For the last few months I have been struggling with engine >>> flooding on start up. Looking at the EC2 manual, it tells me >>> that it comes pre-set for "standard" Mazda injectors. I checked >>> the injector charts and most of the Mazdas have 460 or 550 CC >>> injectors for primary and secondary. My engine (Cosmo 13B) comes >>> with 550 cc primary and 850 cc secondary. >>> >>> I did some Mode3 adjustment on the EC-2 and looks like it's a bit >>> better, but the trailing plugs get wet if it does not start right >>> away? >>> Any Ideas? >>> Buly >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >>> >> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> > > Bulent Aliev > www.enginegearonline.com > Email: bulent@enginegearonline.com > Ph. 954 557-1019 > > -------------------------------------------------------------------------------- > > > -------------------------------------------------------------------------------- > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >