Comparison of stock and 90 series pumps
[SIZE="4"]Test results of I/C comparisons using stock and 90 series pumps
Well I have gotten a bit tired of testing and finally did the testing that I wanted to get done. The testing was to show the pressure drop or restriction in the various parts of the I/C cooling circuit. I did multiple tests to show the static pressure drop in the test setup and then with each of the components. This allows you to determine the actual friction in the elements and see how the system can be improved.
To do the testing I used both the factory pump (10 series) and my new super duper 90 series pump so that its value can be evaluated. I recorded the results on separate sheets to keep the data meaningful and tidy. For completeness I ran a test on the: test stand alone, the stock intercooler, one that I had modified to be a parallel flow intercooler, and the factory heat exchanger.
From this level of examination the 90 series pump is one capable mother of a pump. Might be overkill. But that is not the deal here, I wanted to see how the intecoolers compared - stock to parallel flow. When I get organized, the next series of tests will be to compare the thermal efficiencies between two designs. To be meaningful, I had to create and confirm the test bed with plain water before I started worrying about the heat rejection differences, if there are any.
The videos show the simplicity of the setup, one video for each pump ( sorry about the tv background noise ). The coolest thing was the low cost variable speed 12 volt motor controller. I thought that it was a benefit, boy this was a good call, made it soooo easy to set the pump speed and the flow. 13.6 volts was the max factory spec power supplied during pump testing, your car would probably have less due to wiring losses. This will be used in the car to set the speed; when I install it later this year for road testing.
The data sheets are photographed due to the amount of data. I ran several repeated-tests as the pressure meters were not accurate enough and did not cover the full range desired. My new /big ebay meter was a steal and way easy to read. The final test report shows the pressure of the two intercoolers side by side over various flow ratings. Testing was from 2 GPM ( the lowest reasonable flow ) to my own chosen limit of 6 GPM which is double what most of us are using with the upgraded 30 series pump. The chart of the pumps comparison appears to be accurate and something that is helpful to look at at least once.
By the way, the results indicate how much you’re pump can flow, the actual about will be less due to hoses and fittings.
Test result charts for the stock pump, upgrade pump, and the super 90
http://www.lhmarine.co.nz/userfiles/...p%20curves.jpg
To be reported soon, the thermal comparison of stock and parallel I/C.
Enjoy, Woody
Stock pump testing ---- Stock IC
FLOW GPM..........Pressure drop.........voltage applied
..........................PSIG.................... to pump leads
2.0......................1.05..................... .7.5
3.0......................1.8...................... ..9.7
4.0......................2.5...................... ..11.9
5.0......................2.99..................... ..13.6
0.0......................4.4...................... ...13.6 MAX HEAD PRESSURE
Stock pump testing parallel IC
FLOW.................Pressure drop...........Voltage applied
...........................in PSIG.....................to pump leads
2.0.....................0.3....................... ...5.5
3.0.....................0.7....................... ...7.3
4.0.....................1.3....................... ...9.7
5.0.....................1.9....................... ...11.8
5.7.....................2.3....................... ...13.6
As you can see the parallel water circuit of the IC has less restriction, allowing better flow.
THIS IS A TEST OF IC ONLY, NO PIPING OR H/E RESTRICTION IS INCLUDED. Test is to show the differece in the IC design pressure drop - stock versus the parallel design.
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The next test reports will show the difference of the 90 versus the 10 series pumps.
The last report is the heating of the water and a termal comparison of the two IC designs.[/SIZE="4"]
Last edited by waldig; Jan 9, 2013 at 09:20 PM.