by hillzabilly » Sun Sep 10, 2017 7:35 pm
Are we talking about a boka style still or a bubbler type still ,bubbler RC;s for 4inch go from about 100mm to 200mm and use 3/4 down to 3/8inch cooling tubes as for how many ,check out a few builds and you make a choice,if ya in Tassie and are blessed with a cold climate and coolant temps then maybe on the shorter side ,go up north and going bigger is probably a wiser choice,then the more power ya wanna run means a bigger RC as well or more narrowa coolant pipes ,wich is all about the amount of sureface area you have compared to the power imput and adjusted by the coolant temp,500mm would be more like a 2-21/2 inch shotgun PC to go with the RC and again size would go by the previously mentioned local requirements .anyhooo.cheers hillzabilly ;-)