Gday

Iv recently noticed a small amount of coolant leaking from both of the holes on my waterpumd. Iv heard that this means that the pump is shagged and I should get a new one. I was thinking of getting an electric pump but I dont really know too much about them.

What are the positive/negative points of an electric pump?

Roughly how much would a good quality electric cost compared to a mechanical one?

What is involved in installing the pump?

What are some good brands to look at?

Thanx for any help!

why do you want a electronic pump? you wouldn't even gain one tenth of a hp and they have a anoying hum about them.

The only real advantage would be the use of runon after the motor is switched off. This allows the hot coolant to be circulated without the engine running.

But you may as well do that with a 'booster' pump and retain the normal water pump.

why do you want a electronic pump? you wouldn't even gain one tenth of a hp and they have a anoying hum about them.
What, so turning on/off AirCon won't affect power either? Of course it bloody will!
It may not increase/ decrease the actual power made by the engine, but it'll make a noticeable difference to the power that reaches the wheels, because a water pump creates a considerable pre-load on the engine, in the same way that an AirCon compressor or even a Supercharger will.

If you remove the standard mechanical water pump & replace it with an electric item you remove that preload, in the same way as turning off AC... same thing with older cars with Clutch fans... remove them & replace with an electric Thermo fan & you're removing another preload. It's not about creating power, it's about removeing losses.

As for the installation, I can't imagine it'd be tooo difficult, but getting it done professionally might be a good idea. As well as plumbing in the new one, you'll need to seal off the old one (they might just leave it in place, but since it's already leaking), plus you'll need the controlled installed. Because it's electric, it's thermostat controlled... allows the pump to drive appropriately for how the engine is being used, & allows the run-on cool down cycle.

I dunno how much the cost.. from memory it wasn't too cheap, but then again, a new mechanical one probly isn't either? Theres a 1/2 page AD for a mob who sells them in Hot4s occasionally.
Hope this helps

NO no no ... you would never turn off the circulation of water. You may vary (possibly slowdown) the circulation thou. Even if the thermostat is closed you definitely still want the water to circulate within the block/head to prevent 'hotspots' forming.

So all you would be doing is moving the drag from the mechanical drive ... to the alternator.

I guess another advantage of the electric pump is you can control its speed independent of engine speed.

Ok I understand that it will remove a load from the engine which will free up a little bit of power for the treads. I was under the impression that an electric pump ran all the time as only a di****ad would design a pump to stop circulating coolant in an operating engine, as for a speed controller...I wonder if you'd connect it to the coil -ve like a tacho to tell it the engine speed?

Wouldn't the electric pump replace the mechanical pump thats already there?

...This is all sounding a bit too much effort for the amount of power that Id 'reclaim', roughly how much is an aftermarket high performance water pump to suit a TS engine. Iv heard the mitsu ones are $550 or something stupid and the aftermarket ones are better and cheaper.

as i said, its definatly not worth it. the water pump is hardly going to drain as much as a aircon or supercharger :confused: sfa imho.

Here's a link to the Davies Craig electric water pump site......

http://www.daviescraig.com.au/main/display.asp?pid=8

Also read the article from Ford Muscle Online Mag in the right hand column on that link


.

as i understand, the davies craig is the only reliable proven one. but they around 4-500$ to save about 4-5hp so poor value for money. A lot of racers use them bec every fraction of a second is an edge, and thwey might actually flow/cool faster and better. but im not sure how they work at slow speeds or idling, might run too cold in winter or take too long to warm up at startup :doubt: .

Wasn't there an article on autospeed about the davies electric waterpump, they where so impressed with it they where threatened with legal action if they published the article :confused:

Looks like its old school belts and pulleys for me. How much could I expect to pay for a high quality/performance pump, not a mitsu replacement?

high performance? its a water pump :P and there is no way a water pump saps 4-5hp... a starter for those cars is about 1.25hp and it spins the engine at 300rpm...

repco have replacments for most engines, try auto one for the same item at a marginaly cheaper price.

Wasn't there an article on autospeed about the davies electric waterpump, they where so impressed with it they where threatened with legal action if they published the article :confused:

Why the hell would they threaten legal action if its a good write up!?

Also try auto one, auto pro, autobarn, all those places have those parts.

Why the hell would they threaten legal action if its a good write up!?

Also try auto one, auto pro, autobarn, all those places have those parts.

Thats the thing, it wans't a good write up (they never published so I don't know) they were not happy. :confused:

That's not what you said though lol...re read what you wrote :D
"they where so impressed with it"

high performance? its a water pump :P and there is no way a water pump saps 4-5hp... a starter for those cars is about 1.25hp and it spins the engine at 300rpm...

repco have replacments for most engines, try auto one for the same item at a marginaly cheaper price.

thats at the engine, not at the wheels 3-5hp, dont forget that it may turn easily in your hand not under load, but when its actually pumping coolant under pressure through the block, the hoses, and all the cores of the radiator theres a lot more resistance.

on a V6 it would hardly make a difference, but on a small engine like your charade having all the belts off is very noticable extra power (just around the block a couple times before it overheats and the battery goes flat) :bowrofl:

That's not what you said though lol...re read what you wrote :D
"they where so impressed with it"

I know exacttly what I wrote, mazzazx51 seems to get it :D .

Ahhh killbilly somtimes I wonder lol

Well I booked it in to get done on Thursday for $150 including a tune up. Looks like I'll have to drive my old Tercel for a day...damn Im gonna miss my Magna...a whole day...:cry: I would install it myself but $40 for installation and a quick tune seems pretty good.

cant go wrong! specialy cos it comes with a warrenty now

That's not what you said though lol...re read what you wrote :D
"they where so impressed with it"

KB the term sarcasm jumps to mind ;)

lol I get it now, but it's hard to tell that stuff when there's just words on a screen. Plus the little ":confused:" made me think he was just as confused about it as I was (seeing as though the smiley IS a confused one lol)