[bowman1964]

ok well i used a calpillary tube and i will tell you why.ok i know alot of people on here run freon but i have been fooling with and selling ac supplies for somewere close to 20 years.im not over the hill but i do know a little bitt.now if anyone doesnt know i will tell you freon works by the sudden drop in pressure of a liquid under pressure to a gas as soon as it is released to a low pressure area.this causes exspansion and boiling resulting in cooling by the sudden removeal of heat.now this cooling starts at the very first point of a pressure drop.if you use a expansion valve the cooling will start at the low side of the vavle and continue to the evaperator untill the freon is boiled off and returns to the compressor.this isnt a efficent use of the freon since you are cooling everything before the evaperator.now i designed mine with alot of ac use in mind.i have a calpillary tube with a nozzel directly over the cpu die spraying pure liquid onto the cold plate inside of the block.the nozzel is only 10 mm high from the cpu die itself.then it starts a return run of over 6 ft of maze .the channel itself is .200 x .300 deep and runs 6 ft though 4 mazes in the one evaperator.so i have bulit this block with more sufface area than anyone realizes.but i didnt stop there .i have seen every trick in the book to get more out of ac. the calpillary tube is inside the return line all the way to the compressor helping to super cool the liquid freon which helps to lower my temps some more.the return line is a custom made flexable rubber crimped hose made by yours truley me.helps when i have made ac hoses for a living.this also makes mounting this evap block so much easer.here is a pic of my proto block to show you what it looked like in the first part of testing