Can anyone rate the primochill Typhoon III?

[BoxGods]

I think i've got it now seeing what Boxgod posted got me thinking, if there is a parallel loop setup where you Y out of the pump then Y back into the res being that water is incompressible you will see no gain. However if you Y out of the pump and your res has dual return ports the res can act as an expansion chamber of sorts. So in effect due to the restriction in the loop the water doesn't need to compress, if you put a Y on the outlet of the pump the water will by nature fill both sides of the Y due to the restriction of each loop and the water taking the least path of resistance.

The least path of restistance will always be the loop that is not full, the problem comes in when you add a Y going back into the res you no longer have any room for expansion therefore you will never see any gain as the volume of water flowing through the 2 loops going back through the Y remains the same because you cannot fit more water through that Y going back into the res.

However if you have two lines going back into the res then you can effectively have 2x the volume of water flowing through the two loops combined when the pressures equalizes and both loops are full.

I can see it in my head but it's really hard to explain what i'm thinking lol not sure if any of this makes sense

WOOOT! You actually are only slightly off (and I think your only off in explaining it, not in how your seeing it in your head).

A simpler way to visualize what the T3 does differently as compared to simple Y's before and after the pump is just that. The Y method removes the pump so the net effect is no gain whereas the T3 gets its increase THROUGH the pump. Do not view the PEC (the pump expansion chamber located immediately off the D5's main outlet) as separate ports as it is essentially a component OF the pump housing. The twin ports off of the PEC are really now the end of the pump. The same holds true for the reservoir attached to the inlet side of the pump. It's really a part of the pump.


Maybe some images will help:



This shows the inside of the back half. The white cover is over the PEC (pump expansion chamber)




This is the same view with the cover removed and you start to see just how integral the PEC is to pumphead itself.




In this image I added a .30" diameter circle to show the size difference between the T3's primary outlet and a normal D5. You can also see the shape of the inlet and how it "humps" to a very sharp edge that is designed to slice the water into the impeller at a radically different angle. I actually thought to try this because of something I read in one of Martin's reviews several years back. Because the inlet diameter is so closely matched to the impeller any changes in its diameter just kills performance.

the next two show the same part from another angle so you can see the relationship of the PEC and the inlet reservoir to each other and the pump head.





I hope that makes the notion of the flow increase coming THROUGH the pump itself clearer.