Before the water jackets were around they took like 1/8" or next size up of brass tubing & wrapped it around the motor. I dont knok if anyone has tried aluminium . But before you bend the tubing find a piece of wire that fits inside of it, thats to keep the tubing from kinking or buckling. After your done pull it out. I would recommend to put some kind of lube on so it makes it easier to pull the wire out.I run for about 2minutes. Some times 230. Limit so far is motor temp. I need to get a better water jacket for the 5870. Probably going to have to make one. The tp water jacket is to small.
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