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" 
> <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