It's an ill conceived idea that a large tank will give you more air.
As Norm has suggested it really is more about the replenish rate than the storage capacity. In blasting there's a massive volume of air required and with that you require a fast replenishing of the air that's been used up. Really to do this sort of thing successfully you'd need at least 20 and above cubic feet per minute to make it so that you don't have your compressor head running full time. This is also where storage volume comes into play.
Effectively you will require a compressor that can replenish faster than what you are actually using at the nozzle.
Cheers,
BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
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