There is no such thing as having too much compressor when you're sandblasting. A friend who was in business as a professional sandblaster had a trailer-mounted mobile rig that used a Ford flathead V-8 engine as a compressor- - - -running on 4 cylinders and compressing air with the other 4. Obviously, some major engine modifications had to be done to make that system work. I helped him install a '51 Mercury crankshaft with a 4" stroke to replace the 3 3/4" stroke Ford shaft to get a little more air volume. I think his rig used a 250 gallon Propane tank for compressed air storage and the working air pressure was around 100 PSI. He could move a lot of air (and sand) with that rig!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!