I have a masterflow tsunami 1050. It is a knock off of the Viair, as are the harbor freight versions.
It should be noted Viair now has their units made in Asia now, like everyone else, and their price and quality has dropped. The 10 year old Viair product is not the same quality as one will find today.
My masterflow has been modified to accept 1/4" npt fittings. I have added a 80mm computer fan to blow over the head. It blows up my ride rite airbags to 100 psi with little issue, never tried those pressures on a huge tire but with the fan I don't worry about the 30 minute max run time
I also have a 150 psi porter cable 3 gallon air compressor for my nail guns. It is a disappointment, with a poor regulator and overall build quality.
One cannot adjust the regulator with any pressure in the tank, and it tends to bleed pressure at times. Kind of noisy too, and the noise is not just an electric motor moving a piston smoothly, but one slapping the piston on each side of the cylinder each stroke, a disturbing metal on metal sound. I have not really given it much use either.
I hope that when it fails completely, it does not inconvenience me too much