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Author: Subject: zetec reversed water pump
ivorbigun

posted on 27/7/15 at 08:56 PM Reply With Quote
zetec reversed water pump

thought this might prove useful to someone
it's a standard zetec blacktop water pump first part the normal rotation second part reversed rotation.
hope to repeat this with a reversed impeller when I get one.

https://youtu.be/4TwrRc0NLxY

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austin man

posted on 27/7/15 at 09:10 PM Reply With Quote
the silvertop had the same problem if you used a mondeo engine, they had a serpentine belt arrangement the reason why the pump when fitted with a standard belt arrangement pumped the wrong way. There was an easy fix for this and that was to use a pump from the 1.6 or 1.8 escort they had a standard belt setup so ran the correct way.

Not sure whether the same principle would apply to say a focus vs mondeo





Life is like a bowl of fruit, funny how all the weird looking ones are left alone

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ivorbigun

posted on 27/7/15 at 10:15 PM Reply With Quote
unfortunately it's not that simple with the black top
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austin man

posted on 27/7/15 at 10:22 PM Reply With Quote
why not fit an idler and run across the back of the belt would be easier than trying to change the impeller or you could fit an electric pump I believe some volvos had electric pumps fitted





Life is like a bowl of fruit, funny how all the weird looking ones are left alone

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mark chandler

posted on 27/7/15 at 10:31 PM Reply With Quote
Electric pump is the winner, even if you reverse the impeller the housing is designed to be more efficient as the outlets are at the wrong angles.

Anyway, look at that flow rate at low RPM, it must be crazy at 6000 rpm.....

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Paul Turner

posted on 28/7/15 at 08:48 AM Reply With Quote
quote:
Originally posted by austin man
why not fit an idler and run across the back of the belt


That is exactly what most people do with a blacktop. Mines been like that for 6 years now. Kits are available from the usual suspects but DIY is not too difficult using scrap yard parts. I used a Raceline pulley and bracket, was not as cheap as DIY but way cheaper than a couple of other kits and it worked with no belt alignment issues. Get the alignment a bit out and you can throw a belt which can cause catastrophic damage if it gets mixed up with the cam belt.

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Scuzzle

posted on 28/7/15 at 01:03 PM Reply With Quote
Another 1+ for running an EWP, if you can afford it, it's an extra 10 BHP on a sorted 2L zetec. and as far as cost per BHP increase goes it's pretty cheap.
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Paul Turner

posted on 28/7/15 at 01:19 PM Reply With Quote
quote:
Originally posted by Scuzzle
Another 1+ for running an EWP, if you can afford it, it's an extra 10 BHP on a sorted 2L zetec. and as far as cost per BHP increase goes it's pretty cheap.


That much BHP, be very surprised. Some years ago I bought a Mallock for hillclimbing and with a front engine car with rear mounted Polo rad an electric pump was the only solution. It had other major advantages on the hills with regards to controlling warm up and cool down but the time gains were minimal (if any) when people changed over. If there had been that sort of power gain it would have shown in the times. At the time Davis Craig claimed about 3% (from memory) but since I did not have a before and after no idea if its correct. Did not have a controller on mine other than a on/off switch.

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Scuzzle

posted on 28/7/15 at 01:27 PM Reply With Quote
Mine made an extra 10 BHP dyno proven, 2.0 silvertop with cams, head work and raised compression but I know someone with a standard 1.6 CVH who got a 6 BHP increase on the rollers after fitting an EWP.

I run the electric controller, the temp you want at the touch of a button is a nice feature, you can run nice and hot for smoothness and economy or bring it down for a bit more power.

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ivorbigun

posted on 28/7/15 at 07:55 PM Reply With Quote
Anyway, look at that flow rate at low RPM, it must be crazy at 6000 rpm.....


don't quite understand what you mean the water pump used is a standard one the greatest flow is when running in the right direction, are you saying that's undesirable ???? or do you mean that in reverse (the lesser flow) the faster it turns the less flow you would get??

yes I could run with an idler but if you mount the alternator on the left hand side of the engine it's difficult to get enough belt contact on the pulley
My only aim with this was to demonstrate the flow rate so that people might be able to make a better informed decision.

I would love to repeat it with a reversed impeller just don't want to spend 80 to find out it don't work!

thank you all for your interest though.

Ivan

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