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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-761948@logan.com>
Subject: Re: [FlyRotary] injector size
Date: Tue, 11 Oct 2005 16:47:09 -0400
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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
>
> --
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