O-320 way rich after Major + 160HP conversion + Powerflow

On 1-Apr-2004, Ron Rosenfeld wrote:

No experience with the O320, but with the Lycoming O360's, the procedure
to
set proper mixture should be doable on the ground.

1. Start engine and warm up until CHT's and oil temps are normal.
2. Mag check -- if normal, proceed.
3. Set throttle set screw so idle is per airframe mfg recommendation.
4. Slowly move mixture control towards idle cut-off and observe rpm. An
increase of more than 50 RPM indicates the mixture is too rich. (An
immediate decrease, if not preceded by a momentary increase, indicates the
mixture is too lean).
5. When performing step 4, don't let the engine cut out.
6. Adjust the mixture control in the proper direction; run up to 2000 RPM
to "clear" the engine, and repeat the above as necessary. If the mixture
change has changed the idling RPM, that should be re-adjusted as needed.
7. If the setting does not remain stable, check the idle linkage for
looseness.


If the goal here is to set the mixture control linkage so that "proper"
mixture occurs with the control at the full lean position, then this had
better be done at or near sea level density altitude. How is the procedure
done on the ground in Denver?

--
-Elliott Drucker