A 60 gallon upright, 220v is big enough for most things, but you can slightly outrun it taking lug nuts off a 8-lug axle with an impact wrench, also when painting and sandblasting. But, it's big enough that the 'catch up time' is not a big deal.
Steve H. - KE0KNH
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner