Wiring the fan? Just cut and solder two wires.

 

Potential issue with electric pumps is current draw.
Alternator has to be able to support it, and also battery has to be sized to accommodate the current draw.

When it comes to electric water pump and electric power steering pumps, it seems results are mixed, in part due to electrical load, and in part due to Evo specific demands- like Insufficient power for power steering rack in quick transitions.

 

sorry i mean like which part of the water system do u mount it into. like pre thermostat on the bottom rad hose or what?

 

With an electric water pump you can run with out a Tstat and just PWM the water pump to regulate coolant temp.

 

On the engine side of the tstat, like the stock pump is. The goal is to circulate coolant thru the engine regardless of if the tstat is open or closed. Alternatively you could maybe run no tstat and have the pump be controlled by a PID system that's based off engine temp.

 

Sorry but IMO adding an electric water pump is a bad idea. Your adding expense, weight, complexity, and robbing HP. Why not just let it cool down before killing it, give it some revs if you need to increase coolant flow.

 

Quite the opposite IMO, yea it's more money but weight gain isn't much, it's not complex at all (actually less complex since you can run no stat or water pump pulley and you'll gain HP because the engine isn't directly driving the water pump.

You can cool the engine with the car off and you can bleed the system without running the engine. There's lots of upsides to it. The hardest part is efficiently packaging it.

 

I kinda like the idea of not having the water pump spinning up water at however-many-thousands-of-RPM. seems like a nice, steady stream would be better? I don't know really. Just thinking it out in my head.

 

I'm going to have to disagree with pretty much all of that. Unless we are talking about a drag car with no alternator and a large low R battery. Firstly the pump with a motor will weigh more. Then you have additional coolant lines. Then heavy gauge wiring to power the pump. Then you need some kind of a pump controller. You would have to upgrade the alternator to supply enough current. Then there is the Crux because converting mechanical energy to electricity and then back to mechanical will never be as efficient. Where the mechanical pump might take 5 hp to turn the electric will suck 10hp through the alternator. I pulled those numbers out of my *** but I hope it illustrates the point.

 

Damn. How much power does it take to move a couple gallons of coolant through an engine????

 

Lol it's not some huge industrial sized electrical pump. They're pretty compact units. The additional plumbing and wiring is a couple pounds at most. The pump can easily be controlled by lots of standalone ECUs. And yes, it does take less energy, because you can control pump speed independent from engine speed which also decreases the likelihood of having cavitations in the water system.

Here you go, from the horse's mouth: https://daviescraig.com.au/electric-water-pumps

Here's one of their basic 12V pumps, pulls a max of 7.5 amps. https://daviescraig.com.au/product/e...-pump-12v-8105


They're both impeller style pumps so how they intake and expel water is a similar fashion but having independent control over the pump speed absolutely has plenty of upsides. In an ideal world the only accessory you drive with the engine would be the alternator, and maybe the oil pump (some would argue against that tho).

 

Well we can agree to disagree then. Do as you will.

 

Davies, Craig is obviously in the market of selling parts. I, personally, am willing to listen to both sides.

 

I know there are added costs... but this is pretty damned cheap, IMO.

https://daviescraig.com.au/product/e...combo-12v-8907

 

I'm a techie, If i can sprinkle some technology on something to make it better I will try. I started looking into electric water pumps a decade ago for my mustang. Every now and then I look back into it and my research always leads me back to the conclusions I have laid out. There certainly are use cases where an electric pump makes sense, maybe yours is one of them. I would highly advise you to do more research and look for testimonials from people using a product for the same purposes that you intend.