Ok so I am running a 7.5hp screw into drier and then into 120 gallon tank and 300ft of 1" pipe. I read in the tech sheets to set the compressor at max... I am running a big hose, and hvlp fittings... To this day I have not had a problem with the compressor set to 110 psi, it will crank to 150 but I rather not add wear or heat. I have never had a problem with air supply. I run my tip pressure around 16psi on hvlp guns.