mbeach there was a really simple homemade desing on overclockers.com, all it was, they took a large floor model fan and made a coil from coper tubbing and layed the coil which was in a spiral pattern against the fan using ties to hold it to the grill of the fan and it worked pretty damn good, mabey someone can post a pic???
Go to an Auto Parts store and ask for a transmission oil cooler. They usually have all sizes. I would reccomend one with at least 50 square inches (5x10) to cool sufficiently. You also might want to talk to #Rotor about getting a waterblock, as he makes them in all different shapes and sizes.
Go to a scrapyard and go berserk in the cars there
you can find a lot of usefull radiators if you dont mind to work your way in to where they put the radiator for warming the air.
it is a litle work on most cars, but some Opel`s is easy as you can get to the radiator from the engine room.
There are those who think, and those who dream, But I, for one, refuse to choose between the two! Xriz`s Place
hmm a plastic waterblock? Hmm I don't that that would work all too well at all. A waterblock's purpose is to carry water through as much area as possible and in doing so conduct the heat away from the heat source. Unfortunately, plastic is a poor heat conductor therefore, I think you can drop that idea.
-=S_Klass=- I tweak... therefore I am.
What they actually do is, they epoxy a sqr plastic cap directly onto the CPU, the cap has an cavity in which the water can travel, getting it in direct contact with the cpu, that's all fine and dandy, but you had that idea by the OO
when you said the word surface area ..... indeed yes, it is limited to the actual surface area of the cpu slug. which is relatively very small.
Go ahead...... lick my BLOCK
My page is here now.(Sorry for the popup banner there)
You epoxy a larger square plastic cap on top of a smaller heatsink. In that way all sides of the WB is plastic except one, the heatsink side. The HS goes on top of the pelt which is on a coldplate.
These are of course only ideas i have... I am lazy so i'll probably end up buying a WB from #rotor...