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----- Original Message -----
Sent: Friday, October 14, 2005 1:49 PM
Subject: [FlyRotary] Re: injector size
>
> On Oct 14, 2005, at 12:38 PM, Ed Anderson
wrote:
>
>> 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.
>
> Ed, I have the wiring schematic in front of me, and there is no
power
> switch for the EC2. Mine is wired directly to a CB . So the
master
> bat. switch (I have two separate) powers the EC2. I
have to kill both
> masters to shut everything on the
plane.
> You are correct, Buly,
Tracy's wiring diagram does not call for a switch, however, I installed a switch
probably in the line where you have the circuit breaker for EC2 pins 33 & 34
(Controller power)
>> 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).
>
> For me, I have to turn off both masters, both
pumps or both injectors
> for engine to stop. I had both injectors
wired (as per schematic) to
> one CB.
> But than started
thinking that if the CB trips, will shut all
> injectors. So I
split them to two CB. I wander if this may have
> something to do
with the problem?
>
> Buly
I think you were
wise to split your injectors power like that, I did not do that and in hind
sight wish I had for the reason you cited.
However, I don't see how adding a circuit breaker would
do that. Now, if you are leaving even 1 of the CB ON then the EC2 is
receiving power even if the EC2 CB is pulled. As long as either
the primary or secondary injector has power on the line (either of your injector
CB is pushed in) then the EC2 will get this voltage. Tracy used to
have an LED on the program button of the EC2 and it would light up when the EC2
controller had power - that is another way I found out about the sneak
circuit. If I turned on an injector toggle the EC2 program button LED
would come on even though its power switch/CB was off.
So do you get the 6.5volts when both injector CB are
pulled?
Ed
>> >> 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/>>>
>>
>>
>>
>>
--
>> 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/
>
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