I want to attempt max range flights in a single engine piston airplane using pressure pattern navigation. My goal is to achieve greater efficiency than what is published in the POH while still using common cruise settings (ex. 65% at a LOP setting or as published in the POH, usually ROP). I know pressure pattern flying is employed by GA pilots on long range ferry flights (to Hawaii, for example) but I cannot find practical guidance on how to plan such a flight. There is plenty of theory and anecdotal information online, and I've read most of it, but very little in the way of practical instruction or calculations.
How would one go about applying PP principles to an actual flight? My objective is to build a front end user interface using live weather data to plan flights using PP principles.
Tucson, AZ to McCook, NE at or below 12,500' in an unpressurized 155 KTAS single engine plane with a ~700nm range. I chose cities that were near the hypothetical plane's max range...could be any city pair.
GA - little piston plane
LOP - lean of peak EGT
ROP - rich of peak EGT