@BD99
I am using a cast iron rad, and interestingly enough, mentioned it earlier today on a different thread:
http://listerengine.com/smf/index.php?topic=7641.msg86532#msg86532Don't have a photo to include, but pretty straight forward. The actual radiator is 26" high with 10 fins. 1" hose and insert adapters make the hook-up.
Cast iron radiators may be had as either hot water rads or steam rads. The steam rads can be recognized by having no outlet at the top. They all seem to have 1 1/2" bosses, so you will have to bush down to 1". If you need to remove a plug (esp from top fitting on a steam rad) you may need to cut it out very carefully. Mine was about as stuck as could be, a long wrench with a pipe extension did not budge it. Beating on the wrench with a 4lb hammer seemed a bit dodgy, I sure did not want to crack the casting. Careful work with a drill, then hacksaw and chisel got it out cleanly.
I did not use any calculations in figuring the size of rad........was given this one, and thought I would give it a try. Seems to work fine in my set-up.
I got the idea to use an old cast radiator from a photo on the original Utterpower site and I believe the same photo is on the cover of Bill Rogers book. In that photo, there is a 5 fin radiator used. That may have been a bit small for extended runs, seemed to work though.
Hope this helps, perhaps someone else out there is using a similar set-up and can add to the information.
BTW, I operate in a cool climate........Pacific Northwest. Never gets all that hot in summer or extremely cold in winter. Wet though!
Cheers,
Hugh