Ed Anderson
Yep, A & B controllers are 100% independent on
programming.
The proceedure I use in-flight is:
1. Establish normal cruise and get the plane
*perfectly* trimmed in zero turbulance air.
2. Lean engine for best economy. This is about
1525 - 1550 EGT on mine. This varies with altitude &
powersetting.
3. Put EC2 in mode 8 and advance timing 1 step
(1.875 degrees) and note change in rpm (a digital tach w/ <= 10 rpm
resolution is a must).
4. If you got an increase at step 3, repeat until
there is no increase in rpm.
5. Retard the timing 1 step.
Factors to keep in mind. My cruise is typically at
17 - 18" MAP which is below the manifold pressure advance point (this
point is adjustable in Mode 6). The timing is advanced by 5.625
degrees more than nominal timing which is typically 20 - 23 deg BTDC at rpm
> 3600.
I think mine is advanced 1 or 2 steps from default
setting.
Tracy
Thanks for the tips, Tracy
One thing not certain I am clear on. When you set
your timing as above, is that just for your cruise flight and do you set it
differently say for take off and climb phase? Or just find the optimum
as you do and then leave it set at that for all else?
Ed