Cyclic,


It is possible for some engines to reach peak RPM in static conditions, with the carburettor barrel 2/3-3/4 open.

However, if this position is adopted as the 'full throttle' position, the engine may gain less RPM, upon unloading of the prop load, in high speed flight.

Also, you may be in the range covered by the low-speed needle's fuel metering, making this adjustment problematic, to say the least.

In this range it is the low-speed needle, which must determine the amount of fuel the engines fuel flow and you would be superimposing this as the maximum, with the high-speed needle.

I would not do that....