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The FlowKooler pump like that is what I have on my car.

They definitely flow coolant, when I rev mine I can see the heater hoses flex up from it adding flow/pressure moving coolant.

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with the 16 vanes, I would make sure to get the pump rpm correct so it does not cavitate at high rpm.

maybe under drive it a little as it seems to flow more volume/pressure if it moves the heater hose with rpm/increases/decreases.

the bigger the restriction the more chance of cavitaion at higher rpm if it cant by-pass some of the volume.

maybe a 1/8" anti-cavitation plate welded to the vanes over milling the housing...which may then make it usless for a differet WP in the future.

with that housing/wp I would be going with a full flow t-stat or no stat running a reducer/restrictor to 1/2 the hose size for some backpressure to slow the water down going thru the rad.

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Hi flow thermostat or none.

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Pump efficiency and flow will go up as you space the pump vanes closer to the housing. It will also take more power to drive. You won't dead head anything.

The question is will any of it have any real meaningful value or measurable improvement.

Personally, I'd be interested in seeing an independent and controlled study to see if the 16 vanes do anything.

How is your current pulley alignment?

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What I'm not understanding is why hi flow could be a problem,

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A fair and an unanswered question. Let me ask the hypothetical question, when the water is speeded up by some means, and the water temp was then observed to be lower, but the oil temp went up? what would that indicate to you? How many people who report lower water temps also compare check pre and post oil temps?

The above is related to the problem, that IMO, has not been clearly answered. Everyone I think understands what cavitation is, basically water reaching a low enough pressure, for whatever reason, it vaporizes in a liquid as vapor bubbles. Watching a swimmer under water and seeing a stream of trailing submerged air bubbles is a good example I think. Now if the water pressure is higher, by depth of water or rad cap induced pressure, pressurized flow, or other means, those bubbles are more difficult to form. What I also believe is the problem we are faced with is, where those bubbles form or touch internal metal hot surfaces, there is a localized reduction in cooling/heat transfer, maybe even to the point of simple localised boiling, even with the rest of the system under pressure. My suspicions are, has anyone ruled this out as a problem with proof, and can anyone make the case that increasing flow rates does not exacerbate this potential issue (think faster swimmer=more bubbles), and I guess the emphasis in fairness should be on "potential" .

A pertinent non technical similar view on the flow and creation of bubbles in water.

http://smoothstrokes.wordpress.com/2013/05/07/no-bubbles-to-eat/

A little more technical but readable Wiki explanation:

"Hydrodynamic cavitation[edit]
Hydrodynamic cavitation describes the process of vaporisation, bubble generation and bubble implosion which occurs in a flowing liquid as a result of a decrease and subsequent increase in pressure. Cavitation will only occur if the pressure declines to some point below the saturated vapor pressure of the liquid and subsequent recovery above the vapor pressure. If the recovery pressure is not above the vapor pressure then flashing is said to have occurred. In pipe systems, cavitation typically occurs either as the result of an increase in the kinetic energy (through an area constriction) or an increase in the pipe elevation.

Hydrodynamic cavitation can be produced by passing a liquid through a constricted channel at a specific velocity or by mechanical rotation of an object through a liquid. In the case of the constricted channel and based on the specific (or unique) geometry of the system, the combination of pressure and kinetic energy can create the hydrodynamic cavitation cavern downstream of the local constriction generating high energy cavitation bubbles.



Orifices and venturi are reported to be widely used for generating cavitation. A venturi has an inherent advantage over an orifice because of its smooth converging and diverging sections, such that that it can generate a higher velocity at the throat for a given pressure drop across it. On the other hand, an orifice has an advantage that it can accommodate more number of holes (larger perimeter of holes) in a given cross sectional area of the pipe.[2]

The cavitation phenomenon can be controlled to enhance the performance of high-speed marine vessels and projectiles, as well as in material processing technologies, in medicine, etc. Controlling the cavitating flows in liquids can be achieved only by advancing the mathematical foundation of the cavitation processes. These processes are manifested in different ways, the most common ones and promising for control being bubble cavitation and supercavitation. The first exact classical solution should perhaps be credited to the well- known solution by H. Helmholtz in 1868. The earliest distinguished studies of academic type on the theory of a cavitating flow with free boundaries and supercavitation were published in the book[3] followed by.[4] Widely used in these books was the well-developed theory of conformal mappings of functions of a complex variable, allowing one to derive a large number of exact solutions of plane problems. Another venue combining the existing exact solutions with approximated and heuristic models was explored in the work[5] that refined the applied calculation techniques based on the principle of cavity expansion independence, theory of pulsations and stability of elongated axisymmetric cavities, etc.[6] and in.[7]

A natural continuation of these studies was recently presented in[8] – an encyclopedic work encompassing all the best advances in this domain for the last three decades, and blending the classical methods of mathematical research with the modern capabilities of computer technologies. These include elaboration of nonlinear numerical methods of solving 3D cavitation problems, refinement of the known plane linear theories, development of asymptotic theories of axisymmetric and nearly axisymmetric flows, etc. As compared to the classical approaches, the new trend is characterized by expansion of the theory into the 3D flows. It also reflects a certain correlation with current works of an applied character on the hydrodynamics of supercavitating bodies.

[10]"

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What I'm not understanding is why hi flow could be a problem. I'm going with a 4 core champion. Would increased flow through the radiator decrease its cooling ability?

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Howard Stewart is the waterpump dude, that's for sure.

Increasing pump efficiency MEANS that it pumps more water with the same amount of horsepower, or pumps the same amount of water with less horsepower.

Increasing pump efficiency should not increase the horsepower needed to turn the pump a given rpm.

I used to spec centrifugal pumps for a living.

Here are the laws for centrifugal pumps:

Flow increases linearly with rpm
Q2 / Q1 = N2 / N1

Head (pressure) increases as the square of the speed increase.
H2 / H1 = (N2 / N1)squared

Power increases as the CUBE of the speed increase.
P2 / P1 = (N2 / N1)cubed

So, for example, slowing a pump down 10% reduces the power required to 73% of that required at full speed.

Centrifugal pumps behave in very predictable ways.

R.

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