Quote:
Originally posted by Albigger
yeah, my block was designed to be a (very) high flow block, so I wouldn't hope to be anywhere near 1/2 gpm, at which perf. would suck as you say. Do you think even when going to a thinner base thickness that not being directly centered will hurt more? Enough to be noticeable?
interesting PDF there, thanks for the link. In my revision I would like to use a small ball mill to create many dimples in the bottom of the block. This would increase surface area around 57% as opposed to a 'flat' milled base.
I will also have to look into media blasting. what do most here use for roughing up the inside of the block? Anything? I could swipe some 80 or 60 grit paper in between the pillars, but I wasn't sure if this would be better/worse than sand blasting....
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You're welcome.
For a higher flow, you'd be much better off with a thinner baseplate. At .125 (1/8 inch, aka 3.2 mm), that's good. In my design, I'm going for 2 mm, but I may drop it to 1, for a flow rate that will be in the order of 4 to 6 gpm (240 to 360 gph).
The effect of the off-center would be more noticeable, but again, because of the fin height, you probably won't see any. It would perform better if you dropped the fin height, because it would increase the flow speed.
I think most people use whatever is available. Sandblasting is pretty common. I 've thought about using an acid, but the surface would be way too irregular, and the block would probably perform much worse. Sandpaper is good, but it's awfully inconvenient.