I want to run say a Meziure electric water pump at double the speed. How would i go about doing that? Or is it possible? I would like to know before i get one and find out i cant do it. I was thinking about doubling the Volts to it, but....

 

Why? That's a really dumb idea. 55 gpm is more than you need for coolant flow for ANY engine.

And no, you cannot double the speed of an electirc motor by doubling the voltage. The motor will burn out. You would have to alter the pump gearing.

Really, what were you thinking with this idea?

 

don't be an *******.
you could have said it'd burn out the pump or the pump is just fine how it is...

really, does it make you feel better about yourself trying to make someone else feel bad?
get a life dood.

 

Oh, boo hoo. What are you now, protector for those who ask stupid questions? Do you cry at sunsets, too?

The question was dumb. It obviously based out of zero research, and with zero consideration for purpose: "Everything must be better if it is faster". It deserved ridicule.

But let me guess, you never make fun of people right? Don't even bother trying to tell me you don't. You've just picked your fate: liar, or hypocrite. Which is it?

 

if you've got nothing to say don't say anything. seriously dood, go find a friend

 

yeah if you dont what it is for, then dont comment on it.

if you really must know, it is part of the hydrogen project i am working on. I will be using much more coolant than normal becuase temps are higher when using it. I dont want the motor to crap out. It is called a precaution. Maybe youve heard of it?

 

i think if you want improved flow, you might try using it in conjunction with the stock pump, or maybe another one inline. basically when you raise any device above its reccommended voltage range, it will deteriorate pretty quickly.

 

i am thinking of using a half sized pulley on the mechanical pump instead.

 

i would stay away from that. it'll cavitate. i'd just stick the electric pump inline between the radiator and normal water pump and possibly underdrive it.

 

the problem with using the stock motor for the pump and changing pully size is the motor doesn't make the torque to spin the impeller to move the water so what will happen is the motor will burn from trying to work too hard.

 

The efficiency of a cooling system is based on its VOLUME not its speed. The rough idea is that if you have water moving too fast it actually won't cool because it doesn't have time to pick up the heat while its in the block. Having a larger volume of water (ie 60 gpm vs 55) means that there is more water which will absorb more heat. The caveat is that the volume, or flow rate, is limited by the size of the passages it has to move through. Those passages include the radiator, the block(which is divided into many more restrictive passages), any interconnecting hoses, and the water pump itself. So you could buy the waterpump off of a Mack truck, but it wouldn't do any good because you'd be trying to stuff 10lbs of **** into a 5lb bag.

Another side note, if the impeller spins too fast it will cavitate. It will create 'holes' in the water that are just pockets of vacuum. Those cause all sorts of issues with the water surging around trying to fill the voids and the impeller not grabbing anything then hitting a patch of water.

 

Dood? Your attempt to belittle is almost as sad as your offer of "free tuning".

Noticed a lot of insults in that thread spewing out of you... guess that makes you a hypocrite.

Now then... how about you take your own advice? You've offered nothing valuable to this thread that I didn't give in my original post, so you've got nothing to say.
As for adding a pump inline with another pump... need I comment on the stupidity of your comments as well? Adding pumps inline does nothing for flow volume. You install pumps inline when building a higher-pressure system. Adding a high-volume electric pump inline with the stock pump is, quite possibly, even dumber than the original posters question.

I have an idea: before you start spouting off to others and giving advice, maybe you should have a clue as to what you're talking about. Got any education, even informal, of fluid flow? Obviously not. So if you've got nothing to say...

How about this? Instead of offering ideas (terrible, terrible, problem-inducing ideas at that) as to how to fix something, why not at least know WHY or WHAT eneds to be fixed.


Here ya go:
A 55 gpm pump flow will be more than enough coolant flow to support the decreased power outputs of a Mazda rotary-based hydrogen-powered engine.


So here's an idea: next time you try to be helpful, know what you're talking about. Next time you try to insult, don;t make yourself look hypocritical.

Consider yourself schooled, child.

 

No. Volume is the amount of fluid, we care about flow volume, which is a measurement of pumped fluid over a given period, which is entirely dependant on fluid speed.
If speed does not matter, how do you think higher flow rate pumps work? The fluid volume remains a constant, but the flow speed is increased.

If you simply increased a cooling system's volume, although you would increase the total specific heat capacity of the system (more water to absorb more energy) but did not alter the fluid flow, the heat exchange through the system would be no greater than stock.

And its not really whether or not the impeller spins "too fast". It is whether or not the impeller is within its range of efficiency for the given fluid. You can even alter the stock water pump impellor to alter its efficiency so that it can be spun at a higher rate without cavitating.

 

umm...i would have to say that my original post wasnt that moronic. I stepped up motors all the time in my engineering classes. Seeing i have never had my hands on a electric pump i was curious if i could go the same.

 

lots of guys add an in-line pump for porsche and vw conversions.

and the rest of what you said is just flapping your gums.

 

Topic














you

 

"Maybe you've heard of it?" Trying to belittle me, as well?
Maybe you should english before you try to insult someone. Its hard to feel insulted when its being done by someone who can't even form a complete sentence, let alone punctuate it.

Lastly, maybe you should know what you're talking about before you try to school me on "taking precautions".

You know, this thread could have been so simple:
Original poster asks: "I am building such-and-such a project. What kind of pumping requirements will I need for this? Can you make any recommendations as to a pump which will work well for me?"
I respond with a helpful, polite, and correct response.

Instead, you come into a thread making ridiculous assumptions on a subject you know nothing about and then trying to insult the only people who ahve given you a correct response. In the future, if you need to know the answer to a question to help you in your project, make a post asking intelligent questions after doing a little research first. Google is your friend here. Puntuate and spell the post correctly, and I, as well as many others, will be more than willing to help answer your questions.

To this point, I am still the only one who has given any real form of fact in this thread.

Tell me exactly what you are trying to do, and I will tell you EXACTLY what needs to be done as far as a cooling system.

 

What school of engineering did you attend that tells you to exceed the rated maximum voltage of an electric motor? In my engineering degree, I learned that all motors must run within 10% of their rated voltage. IE: a 120V motor must run within 108 and 132 volts. If you try to push 575 volts through it, the motor burns out.
Engineering is about designing a system to meet its requirements without using unneeded materials in order to minimize cost, space, and weight. The windings of an electric motor are sized for their voltage and current draws by an engineer... no well-educated engineer is going to build an electric motor to work at double its rated voltage and still work well at its rated voltage. It would be far too expensive, far too heavy, and far too large. An engineer would design a second motor to meet the larger requirements.

 

Adding a higher flow inline pump, acting at the same operating pressure, is stupid. When a significantly larger pump is placed inline of that of a smaller pump, the smaller pump will be a restriction. Removing the stock pump would yeild a higher overall pumping flow.

 

now your reason for wasting space in this thread is...?

 

So far, I am the only one in this thread that has given the original poster any clue as to making an efficient cooling system. You have not.
Again, you're hypocritical. So very sad.

 

all you did was flap your gums trying to sound smart while insulting the guy.

 

Ack! Thanks for correcting me. That clarifies things quite a bit.

 

if you pump the coolant through the system to fast, you can "change" the fluid faster than the heat transfer can occur. Similar to removing your thermostat. THe coolant circulates so fast, it can't efficently transfer the heat to, and from, the coolant.

 

The problem with this (removing the thermostat) is not the velocity of the coolant but the reduction of the pressure in the block which lowers the vapor point of the coolant allowing the formation of gas pockets ie steam on the cooling channel surfaces which has a much lower conductivity than water, if you look at heat exchanger design basically the higher the velocity the better the heat transfer.

As for doubling the speed of the pump apart from the fact that the motor may or may not survive, cavitation will be a problem if the pump has been designed to be efficient at its intended operating speed