flyrotary@lancaironline.net Mailing List Archive

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" <atlasyts@bellsouth.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> 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" <atlasyts@bellsouth.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> 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/