Electric water pumps?

[gmonkey]

Thinking of replacing my 1jz water pump with an electric driven one and having only the alternator running off the serpentine belt.

Has anyone experienced one of these?

-What are they like to run?
-What happens with my old water pump, is there a blanking plate or something?
-Is it worth it?

cheers guys

[toyota1515]

It is a wise move, not only cuz your cooling system gona run more stable and controlable, but cuz you gain some extra horses in the process by eliminating a parasitic device from your engine.

However it needs to be custom made

[Sam_Q]

how sure are you about those two points? I have seen otherwise

[toyota1515]

how sure are you about those two points? I have seen otherwise

Done it many times in many diferent engines race and street buddy, and i really havent done one yet that prove me wrong, in neither of the 2 points.

Use the logic, if the coolant fluid goes too fast tru the system it do not have the time to disipate the heat from the intended part u are cooling down and mooving the fluid with the crankshaft is power robing effect, you guys need to use your head other than comb the hair or hang a hat on it! LOL

[TERRA Operative]

What's the reliability of a plastic (Davies Craig et al.) pump over a stock OEM cast alloy belt driven one in the long term, ie a couple of tens of thousands of km?

[toyota1515]

Well i dont know what you mean cuz the pumps i use for that matter are specificlly made for that and as far as i remember the first one i did 8 years ago still work just perfect,

Here is the one i am talking about all billet and rebuildable bro!

[TERRA Operative]

Ah, the Davies Craig pumps are glass filled plastic, so I was always a bit unsure of their longevity. That one looks a lot more sturdy. Are there any pictures of the impeller?

[toyota1515]

No pictures of the impeller but i know it is all Stainless hardware inside that thing, they guarantee it for 2 years unlimited mileage,

here is a link!
http://www.meziere.com/ps-1148-0-WP336S.aspx

[wrecked]

What about driving the original pump with an electric motor

[toyota1515]

It can be done, moroso sells a universal kit for that matter but is not street friendly, just race only.

[trdee]

Use the logic, if the coolant fluid goes too fast tru the system it do not have the time to disipate the heat from the intended part u are cooling down

This makes no sense.

edit; before you start waving your arms let me explain why

Q = UAdT

Heat transfer rate (Q) equals
Overall heat transfer coefficient (U) multiplied by
Heat transfer area (A) multiplied by
Log mean temperature difference (dT)

Having a faster flowing coolant means less residence time, so yes the coolant doesnt heat up as much across the heat exchanger (engine). This means the log mean temperature difference is higher, which means the heat transfer rate is higher..

Yes that instantaneous volume of coolant doesnt have as much "time to cool down the engine" but what you are forgetting is that it is a continuous flow. once that volume of coolant is gone it is immediately replaced by the next block of coolant in the system. This is why you have thermostats in cooling systems, to slow the coolant down so that the heat transfer rate is regulated, so that the car doesnt run too cold........

[toyota1515]

This makes no sense.

Hey bro, that was an exagerated metafor do you ever took the termostat out of a honda civic? The water goes too fast tru the radiator without the time to cool down and the car overheats, try it and you will see.

[trdee]

ok so if you did 300kmh and you had air flowing "too fast" over your radiator will your car heat up too? it's not overheating because its flowing too fast, its overheating for some other reason related, maybe removing the thermostat entirely causes turbulence in the flow meaning the coolant doesnt flow through the radiator properly and instead mostly flows through the bypass circuit...

[toyota1515]

Well i done it before many times and worked better than the factory system, temperatures where more consistent troughout the whole range of the powerband plus in the best case it did gain 8 whp,

All your jibby jabber and calculations are just speculations cuz every case is different, when you guys does what i did and get the results i am getting you will umderstand that formulas are for books and papers i dont stop there i have to try everything and maybe thats why puertoricans have the fastest rotarys and 4 banggers,

Only thing and the last i will say is i have done it many times and each and every one worked awesome, my dodge will have one and my Celica too, also remember that it will work better on high performance engines,

A good advise is, do not give up without even trying, think out of the box and you guys will be surprised!

Good luck.

[toyota1515]

ok so if you did 300kmh and you had air flowing "too fast" over your radiator will your car heat up too? it's not overheating because its flowing too fast, its overheating for some other reason related, maybe removing the thermostat entirely causes turbulence in the flow meaning the coolant doesnt flow through the radiator properly and instead mostly flows through the bypass circuit...

A radiator got its limit and will not cool more cuz it got more air tru it, any way i did said what i have to say already and wont gonna get into a pissing contest with you, the factory system work but the electric water pump work better plain and simple, if it wasnt that way race cars wont use em in all kinds of racing scene!

Good luck!