Can anyone rate the primochill Typhoon III?

[BoxGods]

Some are missing the distinction Vapor keeps making when he says THROUGH THE PUMP I think. Because water is not compressible in our water cooling operating range just adding a Y 6 inches our so outside of your D5 pump top and one 6" from your inlet will not increase the flow rate through the pump.

I went down that path with the T3's evolution. I started with the standard .30" dia outlet from the D5 into a tank about the same size as the inlet side tank and performance was VERY bad. I reduced the primary outlet tank by 25% and saw some improvement but performance was still bad.

In order to increase flow I increased that primary outlet size that feeds into the expansion chamber and saw another improvement. Obviously if the outlet is bigger the intake needs to be bigger so I tried that which dropped performance to levels lower then we started with. Making the inlet port bigger without a new impeller just kills performance as that ports diameter is matched to the impeller.

Without being able to increase that diameter I was pretty much dead in the water because you can't put out the water faster then you feed it in obviously. It bummed me out because I had determined the correct size for the PEC (pump expansion chamber) and the right ratio between the PEC and the reservoir feeding the inlet side of the pump, but I couldn't alter the diameter of that inlet without a new impeller.

Without boring everyone to death on the subjects of efficiency and viscous boundary layer properties (which to be candid I don't understand well enough to explain) I tried a few different shapes to see if feeding the water into the impeller at different angles helped. It does. Then it was just about matching the outlet diameter to the inlet and sizing the PEC and reservoir tanks.

Vapor has mentioned that he thinks we are now very near the end of what the D5 can do without a new impeller design. I agree with that 100% because the pump side has been customized/improved as much as it can be which is why I focused so much on the inlet side and went with the higher flow rate model of dual loops. Unless we get a new impeller that allows more water in there just is not anymore to be gained with efficiency. I tried a LOT of ratios before getting enough data to hit the sweet spot. When the T3 is knocked off your going to see the same inlet shape, the same area for the outlet, and the same ratio for the PEC because it is optimal. I have found another trick to eek out the last little bit of efficiency on the intake side that is being tested now...beyond that there just isn't much left in the D5 without a new impeller.

EDIT* Just to be clear, to my personal way of thinking, a 1% - 3% increase (and even those are going to be hard to come by now) does not warrant somebody buying a new pump top and is a design failure in my book.