Although I agree with Bill that there is essentially no useful engineering data on radiators, I wouldn't mind seeing some of the home-made radiators that some people have put together.
We can get into discussions about radiator design, but the bottom line is that due to cost and performance, a heatercore will always come out on top.
For those interested, the reason that any engineering data would not be usefull, is simply because many radiators are tested for their intended purpose (a car), and the testing environment isn't anything near what is involved in a PC, nor would it be measured the same way.
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