We got a Turbo Charger a couple weeks ag and have topped off a couple tanks with it just to get familiar with the operation of it. Today one of our friends that has a ne RAW on the way brought his new Great White 97 cu ft tank over and I filled it from empty to 4300psi in 85 minutes of run time. I let it pump for 20 minutes then ran the fan and pump for 5 minutes or so or until the water was cool again. I am very happy with the compressor, in the run cycles the water did not get hot at all it never got so that it was uncomfortable to put my finger in to check it. I know it says you can run it for longer periods of time with no damage but I am retired and in no hurry and would rather not damage it.