I tried lokking around for the answer to my question but I did not get conclusive results...

I may have found a used iwaki (very lucky) so I am currently thinking big..I am intrigued by car radiators. If flow and head is not a problem why should I stick to conventional computer parts and not go for this: http://cgi.ebay.it/Radiatore-motore-...QQcmdZViewItem

looks big and it is completely made of alluminium. I guess that even passive operation is achievable if the flow is just right...

I have been looking for specific details on the exact heat dissipation capacity of this radiator as well as others but have found nothing....how many watts could an iwaki rd30 + a car radiator (let us take the one I posted a link to) dissipate?

Cheers!