Two words....no stock :(
C-Systems has stopped excepting additional OEM clients until we meet our retail demands.

This comes right from the top, not from me.

In addition AVT is handling some of C-Systems OEM production to give them room to start the upgrade program. AVT (aka Dan Neault) is the sponser of this upgrade program.
They need to do this through C-Systems for insurance reasons.

I hope it will start soon.

Oh - OK so is is anodizing - or at least AFAIK both Anolok and Anolok II are electrolytic dye processes (which lay-people like me call anodizing). Again, not an issue - just was curious...

Interesting. I wonder how length of rotor vane plays into this...(?) Is it rpm x outer diameter? rpm x average diameter? Just more being curious - if you don't know off hand, maybe you can point me at the appropriate text? Not that I'll necessarily understand it - but I'll leave you in peace while I try to. :)

I think there is another important parameter/data: blade height. Fast and big impeller will not generate any flow/pressure while it is plain. By this way, closed impeller could generates good flow as big as distance between its plates. That is how tall are blades will act on pressure/flow ratio. Similarly, fans with same speed (rpm) and diameter can generate different air flow by increasing blade tichness (25mm x 38mm fans).
I wish i had made this clear. And i am just curious too.

^ you are very clear and 100% correct.
You can not state one type of blade is better then another without considering velocities.

I remember about a year ago, when I designed a real nice impeller based on what I knew from pump theory in school. Dan made a straight 6 bladed piece about as simple as you can get, and it out performed my design by 20% (flow and pressure)

Bob search the net, you will find all the pump theory you need. Just remember 99% of it apply's to larger pumps, and most of it is based on proven designs.

What I am saying is someone designed a good pump, then they based the theory on it, not the reverse as some people think.

Your best beat these days, if you do not have experience, is CFD software, for which AVT has had some success with.

The equation that describes the pressure is U^2/g and U=(N2pi/60)(D/2)
Where D is diameter and N is rpm. This is then reduced by the final angle of the blade tip below 90 deg. D is the final diameter.

In the real world of large pumps, you can not use 90 deg and most pumps max out at 75 deg. But this is not the case with small pumps, which react more to the total volume of fluid and rpm then anything else.

Closed impellers control total fluid and can therefore if well designed increase velocity, which in turn increases pressure, with the cost being flow.

It's all a balancing act between flow, pressure and more important motor load, which is why people should not mess around with factory pump chambers.
Almost any DC pump can produce more flow or pressure, but at the cost of overloading the motor or bearings and reducing long term life.

This is the issue we had with the retail MAG, which we needed to design so that people trying to change chamber will have very limited success. This was quite the challange, and I will not discuss how we manage this.

The only issue with the MAG like any other small pump is fluid. You can not pump oil with a MAG and expect it to last. We have other impellers for higher fluids if needed.

A few questions about the CSP750 upgrade program :
- Any idea if there is a time limitation?
- Is it valid for pumps that have been "modded"?
- My pumps come from a group order done by C-systems, can I participate in the upgrade program?

Some comments:
It would be a nice idea to have both side and top inlet on the CSP Mag pumps, as some users may prefer to sacrifice some space to gain some performance or the opposite (though I know that the top inlet is not as restrictive as a 90-degree elbow).
Very restrictive systems are used in Europe. Most of the time, you get between 25-40 gph. For this kind of watercooling circuits, a pump optimize to produce the most possible pressure at let's say 80 gph would be ideal!

We have top and rear inlet options, for side just turn housing 90 deg :)
Return any 750 in any condition as long as they don't have Innovatek logo.

Haven't flow tested these vary restrictive blocks yet, get between 5.6 and 6.4 l/m with DD TDX, D-Tek white water,and Swiftech 6000.

Higher for older maze type blocks.

Thanks Dave. I actually meant 2 inlets ports (top and rear) and 1 outlet on each pump ;), so that the user can choose what he prefers. Also, the advantage is that C-systems would not have to manufacture 2 different versions of the same pump.

....and a Tapped blanking plug for the other. Much as was done with the watercool.de polytop for the DDC.

^ Can not get plug to fit in rear port without restricting top port inlet.
We use the pre-chamber area for both ports, so if a plug is in there, it causes restriction.

Looking for a short plug now.

Eventually a review :)
SystemCooling

I was hopeing they would test dual and inline configs like they did with the CSP 750s, but its still got some pretty good info on these little babies. I think Cathar should do that part ;) ;)

What do you think about a overlay plug with o-ring.
I think that just a 4mm thread depth will not obstruct top inlet.

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