blakep82
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| posted on 21/7/07 at 09:37 PM |
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thinking of electric water pumps...
whats everyone thoughts on them? Davies Craig ones seem a bit too pricey (although they're probably about the right price) and they are the only
one's i see for sale. i know VDO make one, but i expect that'll cost more.
has anyone come across any (possibly american ones for chevy V8s or whatever) that are more reasonably priced?
My engine will only just about fit in the bay, and with the stock water pump fitted, its too big, plus i reckon the pump is needing replaced. My dad
owned the doner car since the 80s, and the engine now hasn't turned in about 10 years. i don't think its ever been replaced. also, i want
to minimise the number of belts. i think i can get away with just one
[Edited on 21/7/07 by blakep82]
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RazMan
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| posted on 21/7/07 at 09:51 PM |
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I've got the Davies Craig pump fitted on my V6 - excellent bit of kit. I also fitted their controller too and that really makes things work
better, pulsing the motor until working temp is reached and then controlling pump speed to keep an accurate temp (in my case 85 deg C)
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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blakep82
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| posted on 21/7/07 at 10:03 PM |
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excellent! cheers for the info. did you look to see what others are available? which one did you use? (80l or 110l) where did you get it from? how did
you go about blanking off / disabling the stock pump? etc etc
so far, its looking to be £250 for the 80l and controller, but thats from demon tweeks. i'm sure there's better prices to be had
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RazMan
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| posted on 21/7/07 at 10:27 PM |
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tbh I didn't look too hard for alternatives as the DC one was quite well known and readily available (although I didn't want to pay
DT's price) I bought mine from a company called MAW Solutions (can't put my hand on the invoice atm)
In my case, the V6's water pump was an external jobbie running from a cam belt so it was an easy job to just remove it and stick the 80L DC item
in a convenient place. According to their instructions you can remove the impellor or just let it idle (personally I would remove it)
Early versions of this pump had bearing issues and I got a lot of flack for choosing it based on this fact. The later ones (under 3 years old) have
revised ceramic bearings and work very well. I can definitely recommend them - they are totally silent, efficient and save you a few horses too.
http://www.mawsolutions.com/ and they were less than £200 inc controller.
[Edited on 21-7-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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BenB
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| posted on 21/7/07 at 10:30 PM |
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Actually there was a discussion recently on the BEC list about electric water pumps which concluded that the Craaaaaaaaaaaig David "can I get a
rewind" pumps aren't that cop and you're better off using one of the helper pumps of Audis (Bosch do a pump, which someone kindly
gave the ID for on the thread which I've now deleted! Doh)... I've heard that the CD pumps sometimes have short lifespan...
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blakep82
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| posted on 21/7/07 at 10:34 PM |
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good to know the 80L one does the trick! what size engine is yours? mine will be a 3.0L V6, so should be similar. do you know if your pump has, i
don't know how to put it, well, is it right on the edge of its tolerances regards pumping, ie is it contantly running at max speed to keep the
water at the right temp? you know what i mean...
my engine has a chain driven cam, so my water pump sits right above the crank shaft, and is belt driven so again easy enough to whip out. did you make
up some kind of blanking plate?
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blakep82
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| posted on 21/7/07 at 10:40 PM |
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quote:
The EWP80, with its flow rate of up to 80 litres/min, is suitable for vehicles with an engine capacity of up to 5 litres
lol, answers that question!
Ben, do you mean using a helper pump in addition to the stock pump, or instead of it? see, i don't think i can keep the stock one, and i know
its going to be a mare getting hold of another one. I did a search for a topic on EWP, and only found one where 2 people argued about who knew more
about coolant.
as for the lifespan of the CD one, 2000 hours is what they say, which is 83 days running continous, don't know how that relates to normal
driving...
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Fatgadget
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| posted on 21/7/07 at 10:45 PM |
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Got to be a good thing on those engines that have their pumps driven off the cam belt.
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RazMan
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| posted on 21/7/07 at 10:50 PM |
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My engine is a 2.5 but the pump is hardly working most of the time. It allows the water in the engine jacket to get up to temp first and gently pulses
it round until everything comes up to working temps, then runs at variable speeds depending on needs (like a thermostat would)
I have been using my car as a daily driver for six months and have covered 6K miles with absolutely no cooling issues - it simply works perfectly. As
far as working life is concerned I think the 2000 hours would mean several years of normal use (due to the pulsing thing)
btw - no blanking plate needed on my Duratec. I simply binned the external pump and rerouted the hoses to the EWP.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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blakep82
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| posted on 21/7/07 at 11:08 PM |
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i didn't know you get totally external water pumps. you learn something every day
yeah, i think i'll be going the craig david  route. although MAW seem to have put the prices up. they're now the same as demon tweeks
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RazMan
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| posted on 21/7/07 at 11:14 PM |
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Couldn't resist ..... sorry
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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blakep82
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| posted on 21/7/07 at 11:17 PM |
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blakep82
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| posted on 21/7/07 at 11:57 PM |
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thanks guys! i'm pretty sure its the right way to go
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BenB
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| posted on 22/7/07 at 11:10 AM |
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Some people were using the helper pump on its own 
quote:
Originally posted by blakep82
quote:
The EWP80, with its flow rate of up to 80 litres/min, is suitable for vehicles with an engine capacity of up to 5 litres
lol, answers that question!
Ben, do you mean using a helper pump in addition to the stock pump, or instead of it? see, i don't think i can keep the stock one, and i know
its going to be a mare getting hold of another one. I did a search for a topic on EWP, and only found one where 2 people argued about who knew more
about coolant.
as for the lifespan of the CD one, 2000 hours is what they say, which is 83 days running continous, don't know how that relates to normal
driving...
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RazMan
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| posted on 22/7/07 at 11:55 AM |
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I think the controller is the secret ingredient here - without it the pump will just run flat out and you won't be able to regulate the temps on
a road car. A race car however will probably be ok with this, as it needs an 'all or nothing' cooling sysytem.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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DIY Si
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| posted on 22/7/07 at 12:29 PM |
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Remember, that's also 2000 hours flat out, so when using the controller in an undersized engine (ie <5L) it should be much more.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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