Quote:
Originally posted by SysCrusher
Try a pump with a stronger head. I just got done trying out my new block with a single 1/16 jet. It simply was to restrictive for the pump. 1/8 seems to be the limit for my pump. 3/16 is ok with 1/4 being a little to much. So anything between 1/8 and 3/16. With multiple jets, the total orfice area of the jets has to be within that 1/8 to 3/16. Doesn't give you much to play with but your limited to the head of the pump which isn't all that great with these aquarium pumps.
I like to try a Iwaki (that the name?) with a nice head that uses about the same amount watts. When I tried the faucet trick that had about 50 psi and the same constant water temp as ambient air , the gains were great with a 1C difference between idle and load. Total 5C delta. Finding a pump like that without putting it's heat into the water to negate the gains is probably impossible.
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I caught that, thanks.
I've got a Little Giant 2-MDQ-SC, that has a max head of 14.6 feet.
The problem I'm encountering is a dead flow spot in the block. I'm aiming for a jet, but of course because of the unusual inlet geometry, I have to tune it all just right, to maximize what my pump can do.
I ran some tests with my pump, where I cap the outlet with caps with different size openings. I was originally shooting for 3/16. Right now, I'm looking at 1/4. I also tried a 3/8 test.
None of my tests were conclusive. Part of the reason is the calculation (missing measurement?) of the pressure drop. I also suspect that the pump is behaving erraticly, because it has a design limitation (i.e. it doesn't do 0 head), or maybe I'm just completely wrong and nothing has anything to do with anything...:shrug:
See LiquidRulez thread for a bit more info.