I do not remember the formula
I have been ill for the last 2-3 months so I have not updated this. I finally put an electric motor 5hp on the compressor. Pulling the starter cord and climbing on a ladder to check and refill the gas tank was more than this body can take.
This compressor now runs flawlessly. I am so glad I built this. I was working with pneumatic tools yesterday and if I still had the old copressor it would have been recharging the pressure 10 or more times. The new compressor only turned on once to recharge the tank. It is great