Yes, EC2 and 3 port
regulator. Is still to rich after leanest setting on mode 1. After
tuning down the fuel pressure to 30 lbs, I can rotate the mixture control full
CCW and effect a change in mixture.
If you have already adjusted the mixture as lean as possible at
low throttle using Mode 1 or 9, you need to do the following:
On the ground with airplane restrained, run engine at about 25" Hg
MAP. In Mode 3, LEAN the mixture about 3 - 4 steps.
Go to low throttle where you were too rich and see if mixture can
be made right using Mode 1 or 9. If not, go back to MODE 3 and
adjust leaner a couple of steps.
Repeat until you can get mixture in proper range at low
throttle.
After doing this, you may find that mixture is too lean at higher
throttle settings. If so, adjust richer where needed using Mode 1 or
9.
Make sure you know exactly how the different Modes
work.
I've set mode 3 about
15 clicks leaner. It did lower it, but if I go any further, I may not be
able to go rich enough at high power settings.
I haven't done
anything in mode 9 - I'll have to read up on it, and try it on my next trip to
South Carolina.
BTW - Thanks for the
tuning tips
Steve
Brooks
----- Original Message -----
Sent: Tuesday, December 14, 2004 9:07
PM
Subject: [FlyRotary] Injectors
One nagging problem that I have is the engine running rich at
low power
levels. I've turned the fuel pressure regulator down to
30 lbs to get it
reasonably lean, but I still don't have enough
adjustment. The higher power
levels have a pretty good mixture on
the default tuning.
Right now I'm running the stock 550cc injectors,
but I'm considering
changing the primary injectors to 440cc, to help the
low end mixture, and
leave the secondaries at 550cc, so that I still get
sufficient fuel flow
with the turbo at higher power settings.
My
thinking is that the 440cc injectors would allow me turn the
fuel
pressure back up to 38 lbs. and hopefully still be able to tune the
lower
end where only the primary injectors are supplying
fuel.
Does anyone have experience doing this, hopefully with a turbo,
or just have
an opinion ?
Steve Brooks
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