Quote:
Originally posted by bigben2k
#2-Flow area is irrelevant. Flow restriction is. You need to keep the jet tube OD to less than half of the diameter of the dimple.
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Hmmm, not quite.
A = ðr²
You can have the OD of the jet tube be as large as the orifice area of the cup - the OD of the jet tube being equal to the orifice area of the inner diameter of the jet tube
So if the cup was 6.35mm OD (1/4") and the jet tube had a 3.175mm ID (1/8"), then the OD of the tube tube may be as large as:
3.175² - x² = 1.5875²
x = 2.75
Now x is the radius, so the OD of the jet tube may be as large as 5.5mm, (or ~7/32" converting everything back to imperial)