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Unread 05-15-2003, 01:16 AM   #48
Cathar
Thermophile
 
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Join Date: Sep 2002
Location: Melbourne, Australia
Posts: 2,538
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Quote:
Originally posted by funktional
Cathar, which pump do you use for testing? The I used 6x7 holes with 2mm in diameter in the middleplate and the streams coming out of the holes are not very strong, even with a 1600lph 2.5meter Head Pump. So I think this Block would benefit more from a huge Pump than the White Water.
Incorrect conclusion. The problem lies with your implementation.

Your pump would probably push around 8 to 9lpm in a full setup at a guess. This is dependent upon the restriction of the block, but let's say 9lpm.

Your total jet-hole orifice area is 132mm^2. At our guesstimate 9lpm, the pump is pushing 150ml/sec, for an average nozzle velocity of around 1.1m/s.

1.1m/s is pretty sedate, and is slower than the rate with which water will flow through something like a Maze 3, which would typically be up around 1.6m/s for a pump like yours in a full system.

Compare that to my block where with an Eheim 1250, the average nozzle velocity in a full setup is around 4.5m/s. With the Iwaki MD-30RZ, it's up around the 7m/s mark.

ie. your holes are too big. Make them smaller.
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