X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 5.0c4) with ESMTP id 765764 for flyrotary@lancaironline.net; Sat, 15 Oct 2005 16:20:28 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=atlasyts@bellsouth.net Received: from ibm68aec.bellsouth.net ([192.168.16.253]) by imf24aec.mail.bellsouth.net with ESMTP id <20051015201933.ECPV25370.imf24aec.mail.bellsouth.net@ibm68aec.bellsouth.net> for ; Sat, 15 Oct 2005 16:19:33 -0400 Received: from mail.bellsouth.net ([192.168.16.253]) by ibm68aec.bellsouth.net with SMTP id <20051015201933.UNHS14361.ibm68aec.bellsouth.net@mail.bellsouth.net> for ; Sat, 15 Oct 2005 16:19:33 -0400 X-Mailer: Openwave WebEngine, version 2.8.16.1 (webedge20-101-1106-101-20040924) X-Originating-IP: [65.11.53.171] From: To: "Rotary motors in aircraft" Subject: Re: injector size Date: Sat, 15 Oct 2005 16:19:33 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Message-Id: <20051015201933.UNHS14361.ibm68aec.bellsouth.net@mail.bellsouth.net> You are right Tracy. I had moved the primary injector CB to the avionics buss. So I was getting low voltage back energizing the bus and the display. Moved it to the other side and the problem is gone. Glad to report that after about 60 spark plug cleanings :) and some agressive Mode3 leaning, the engine starts right away. Even my tail pipe is getting light brown instead of dripping wet black. That's all for today. My wife ordered me to go to a wedding with her tonight. I told her I'll do it under protest. Now I have to learn the rest of the tunning, or I'll wait for SB seminar? Thanks all for your suggestions. Buly > > From: "Tracy Crook" > Date: 2005/10/15 Sat AM 11:53:25 EDT > To: "Rotary motors in aircraft" > Subject: [FlyRotary] Re: injector size > > Probably caused by the EC2 back-powering the +12 bus through the injectors. BTW, the EM2 should be on a separate avionics bus, not the flight critical. > > Tracy > > > > > ----- 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 > > >