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Hey Sam, I'm assuming you have a dual
controller. Do you have a programming mode 8 on the piston version
of the controller?
The rotary controllers can use mode 8 to adjust ignition timing
+/- 10 degrees. Once you've verified that static timing is where
it needs to be for the controller to work correctly in cruise, and
determine that you have too much advance for starting, you could
consider retarding your B controller timing by the max of 10
degrees and always start on B. That might get your start timing
late enough to avoid kickback.
Charlie
On 5/26/2019 7:00 PM, Sam Hoskins sam.hoskins@gmail.com wrote:
What
are you using for your 2nd ignition? How do you start the
plane; both on, or if only one, which one?
I am using the EC3 for the upper and lower sets of plugs, per
the installation instructions. I have LS1 coils for the upper
and Motocraft for the lower plugs. The coils for each cylinder
are tied together so they both fire from the same impulse from
the ECU. Everything is on during starting.
So 35 deg would be the
maximum advance ever, but operating parameters retard it
back to around 23-25 deg BTDC for normal engine operation.
I don't know if that is true or not. I believe the
timing is set via an internal map that the user cannot
adjust and changes due to RPM and MAP. I do not have an EM2
to monitor spark advance. I like the idea of cranking the
engine while using an automotive timing light to determine
how much advance is present during start. Right now I'm
waiting for my started & alternator from B&C so it
may be a while before I can do this test.
Hi Sam,
If memory serves me right, computer control ignitions
generally have their static timing set to the maximum
advance expected. Then based on engine operating
parmaters such as rpm and manifold pressure the ignition
timing is retarded from that maximum advance point. So 35
deg would be the maximum advance ever, but operating
parameters retard it back to around 23-25 deg BTDC for
normal engine operation.
Ed
------ Original Message ------
Sent: 5/26/2019 11:12:37 AM
Subject: [FlyRotary] Re: How to make a program change
to my EC3?
I was looking through my blog, written
10 years ago, when I was first setting the system up.
I do not have an em2 monitor. I use an automotive
timing light on my ignition settings. I see that at
wide open throttle I have a 25 degree advance, but at
idle it advances to about 35 degrees. So if the EC3 is
starting with that much advance, it's no wonder I'm
getting kick back. However, I don't know if there is
any sort of a ignition advance built into the EC3 that
I don't know about.
This kickback is a relatively new
situation. For the first eight years or so I still
had one magneto. I recently switched over to all
electronic ignition, and that's when this started.
Hi Sam,
Bill makes an excellent suggestion. When
setting up your static timing pointer to your
pulley, if you move the spot for TDC on the
pulley so that it is a few degrees before/after
(rotation wise) the timing pointer (A little
help here, can't recall which way is
before/after TDC) thereby retarding the timing,
then you can use your EM4 to ensure the timing
setting in the EC3 for the Advance/Retard you
want when engine is running. Then when you
initially start, the firing point should occur
after TDC by a couple degrees reducing the kick
back probability and once running you can adjust
the timing advance once for you normal operation
and be done with it..
The main point is setting the static timing
point so that it occurs af few degrees after
TDC on the pulley.
Its been a while for me, so the rest of you
guys jump in here. Sam shouldn't have to swap
out his EC3 to fix his kickback problem.
Ed
Edward Anderson
Anderson Electronic Enterprises LLC
305 Reefton Rd
Weddington, NC 28104 -0569
704 821 7595
------ Original Message ------
Sent: 5/25/2019 2:18:11 PM
Subject: [FlyRotary] Re: How to make a
program change to my EC3?
I had an EC-2, and donated my
plane to the local EAA chapter who sold it
to another user, so I no longer have the
manual, but I believe it had a programming
option for advancing the timing when the
engine is running, so why not RETARD the
timing mechanically and then use the advance
system to bring it forward when running?
Another
option would be the
MegaSquirt/MicroSquirt family of
controllers. Seems to be pretty mature
tech, and at least in the case of the
MicroSquirt, a very compact and
affordable package.
Charlie
On 5/25/2019 9:28 AM, Finn Lassen finn.lassen@verizon.net
wrote:
I have an EC3 installed in my
O-200
powered Quickie Q-200. I
was wondering if anyone might
have any suggestions.?? I need a
simple (famous last words)
programming change and was
wondering if anyone might have
any idea how I might do this.
The problem is, the spark is
not retarded during starting and
all too often I get a nasty
kickback. Doesn't happen all the
time, but it still occurs.?? I
have figured out that first
running the starter without the
ignition turned on seems to
"loosen up" the engine and I
have a better chance. This
kickback has resulted in damage
to the starter bearing and I
have returned it to B&C for
repairs.
The circuit hoard has two
main chips which are removable.
The "A" side is the main
controller for normal operations
and the "B" side is the
redundant side.??
Is there any someone could
figure out what programming
language was used, then modify
it a bit?
Tracy programmed Lyn French's
controller to retard the spark
during starting, so I know it
can be done.
If I can't make this
programming change, I'll have to
spend $3,000 - 5,000, installing
another system, such as SDS, so
I'm making a last ditch
attempt.?? I would appreciate
your thoughts.
Thanks.
Sam
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