I wonder how hot it gets anyway. There must be a bit of heat built up at that pressure. I wonder is the pressure critical, or is it more to do with the heat that is built up at that pressure.
I wonder would a hydraulic pump off a mini digger work.
All pumps should get about the same pressure the only difference is voluum pumped. I have a couple of pumps in central stores from mini diggers, too much on to experiment at the moment but when life slows down a bit I might have an experiment.
