Water Pump Flow rate?
Turbo Mini Forums

Does anyone in the world know this?

Ive spent an evening and an afternoon trying to find this out with no luck

Im getting to the stage of trying to cobble together a test rig and electric drill so that i can find out if no one knows

Cheers
Nic

Makes 2 of us, ive searched too but no luck! Even consulted the yellow bible but no luck.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Electric or not?

Not...lol

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1/4mile in 13.2sec @ 111 terminal on 15psi

Why do you want to know?
Dave

Test rig sounds like a good idea but you need to know what rpm the water pump pulley is spinning at idle,

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1/4mile in 13.2sec @ 111 terminal on 15psi

40 gallon drum, stop watch, long hoses and and someone to keep the engine topped up

Then again the flowrate of the pump pumping into a 40gallon drum is going to be differant to it pumping through a rad. Flowrate (maximum?) isnt the be all and end all of pumps.

i'm just going to use a pump from i think GPR. its a bit pricey but its got fully built in control and if it does much bigger engines it will last a long time at half load type of thing in my engine.

oh yeah, its not a davies craig one, i've heard too many horror stories! lol!

Edited by iain on 22nd Dec, 2007.

youll need to measure the pressure in the block over the header tank pressure nic ,so you can restrict flow on the test to copy that pressure ,then test flow at that pressure .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

The Stewart Warner stuff defo looks a million times better than the DC stuff.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

http://gprdirect.com/epages/GPRDirect.stor...389A&2DBK14&2D1

yup, this is the one i am going to fit when i get the chance! probably when the K head goes on.

Easiest way to get the most acurate figure is to set up an engine and head, remove the center from the thermostat, have the suction of the pump pull from a tank, and the dischardge from the thermostat housing into another tank. You need a way of measuring the rpm of the pump however.

I intend on the next engine build to fit a pressure transducer to a core plug and log the water jacket pressures, as these should be much higher than the rad cap pressure

Edited by Nic on 23rd Dec, 2007.

The pressure in the rad has nothing to do with the pressure in the block and head.

If the pump is running at 2000rpm, it is pushing coolant into the block. If the outlet is blocked totaly, there will be a pressure in the block and head, say, that the pump inlet is 0psi static pressure, the pump may generate 15psi when it starts to cavitate and pump no more, the differential presure is therefore 15 psi. as long as the pump is turning it will generate a differential pressure.

Add into the equasion a closed system a 15psi rad cap, an open thermostat and heat, there will be a differential pressure, but the static pressure could rise to 15psi. What you could then have is 15psi in the rad and 30psi in the block and head.

EH?????????????????????????????????

I dont want this to turn into the usual technical garble as I for one dont have a clue whats going on

My thermostat is drilled so there is always something flowing through it, I dont know about your car but I never completely block up any of the cooling system

If the rad cap is rated at 12psi (or whatever) then wouldnt this will be the first thing to pop open? The pressure wouldnt vary that much though out the sealed system would it?

Infact i think your making this far too complex

The electric pump manufacturers wouldnt bother with that, they would just list a flow figure for how much fluid it moved in a minute from one container to the next

Agreed,
plus with electrical pump most are variable so it wouldnt really matter about flow.

oh and for thermostat,
an electric one can be picked up cheap

Edited by Jordan on 23rd Dec, 2007.

Back once again like a renegade master

I've been trying to not post on this topic, but I feel I could have a simple solution.

As someone who has been professionally involved with pumps for over 25 years, i can assure that this is a complex subject. Some of it has been touched on above and some of it is misleading.

My advice is to find a pump with the same size branch as the standard water pump inlet. You then know that it is going to give you a flow in the right ball park.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

What ever

I'll do it my way and you do it your way

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Hi,
I'm sure I've read that the standard pump is providing all the flow required at 2K rpm, after that it just cavitates.
Cheers,
Gavin :)

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1/4mile in 13.2sec @ 111 terminal on 15psi

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

On 23rd of Dec, 2007 at 06:42pm Sprocket said:
What ever

I'll do it my way and you do it your way

http://tightrope.ie/cg/technical/cooling.html

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will