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Ed,
Would he be better off trying a smaller primary, if that didn't work.
Tracy suggested smaller rather than larger primaries and I forget what RPM
the secondaries cut in, but feel it's fairly low RPM, so a smaller primary
wouldn't hurt.
George (down under)
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/
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>
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Homepage: http://www.flyrotary.com/
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