My ported D5 Pump P/Q results

[sick_g4m3r]

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One thing that is certain to me is my non-variable pump is not as powerful as the variable D5. I want to make the same curve using the same exact top to compare motors. Not sure exactly why this is, but it is at least at the right hand of the curve. Plotting it out to do a side by side will help me understand what's going on there...maybe I just have an oddity?

Then I might try a few nozzle combinations to see if I can get any more out of a real world loop.

Great post!! I cant wait to see you do this!

Also, the smaller diameter of the outlet would increase pressure like the way when you put your thumb over a garden hose.

[Martinm210]

Also, the smaller diameter of the outlet would increase pressure like the way when you put your thumb over a garden hose.

I think that's just sliding over to the left side of the curve, but I'll give some different options a try. I think it's more about what inlet and outlet pressures make the pump more efficient in the 1-3GPM range which is most critical to our needs.

I just don't understand how pump efficiency really works, guess that's what testing is for..

[Martinm210]

Thanks guys, I'll have to take some pictures up close and see if you can help me figure this electronics part out.

[Martinm210]

you should also record pump RPM on the data, for tells you how much more load was placed on the motor or lessened as per mod.

I'm only using a regular 12V PSU, but after I get it back in the computer I can record the RPM change.

[AndyM]

I'd look over Liang's documentation on the D5 before messing with that, seems these are frequency controlled. I read that the variable pump will hold a set speed irrelevent of the input voltage, to the limits of the pump operating at a certain voltage.

[AndyM]

Liang's description of how this works:

Through microprocessor technology,
the Ecocirc pump converts the DC input into 3 phase AC output
at the precise frequency and voltage for optimum efficiency.

Speed controller
The integrated speed controller provides a wide range of control
and can be easily adjusted by turning a dial in the pump end.
It can be adjusted to vary the hydraulic performance and/or
the electrical power consumption. Regardless of the setting,
the pump always starts with maximum torque. This ensures a
reliable start even at the lowest speed. The pump output does not vary according to the input voltage. The current draw is
altered as the input voltage changes. This is advantageous in
applications where a defined pump performance is required,
despite a varying voltage supply.

[Martinm210]

Liang's description of how this works:

Through microprocessor technology,
the Ecocirc pump converts the DC input into 3 phase AC output
at the precise frequency and voltage for optimum efficiency.

Speed controller
The integrated speed controller provides a wide range of control
and can be easily adjusted by turning a dial in the pump end.
It can be adjusted to vary the hydraulic performance and/or
the electrical power consumption. Regardless of the setting,
the pump always starts with maximum torque. This ensures a
reliable start even at the lowest speed. The pump output does not vary according to the input voltage. The current draw is
altered as the input voltage changes. This is advantageous in
applications where a defined pump performance is required,
despite a varying voltage supply.

Ahhh, so we're probably SOL on modifying it then?

Here is a picture of the pot on the D5 Vario


And this is the same location as the D5 Basic without pot:


Here is the no pot full size:
http://www.overclock.net/gallery/dat...basicNoPot.jpg

The only difference I can see is the missing pot and what appears to be two resistors undernieth.