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PostPosted: Wed Nov 12, 2014 9:24 pm 
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Don't run without a stat. Overcooling as as bad as overheating. You'll also get terrible MPG and the fueling will be all over the shop.

The problem will be airflow (either into or out of the bay) or pipe blockage/airlock.

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PostPosted: Fri Jan 09, 2015 2:50 pm 
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I struggled with a similar issue and it was small bits that tipped over to being ok.

Small improvements can be made by mounting the fan as high up as possible on the rad and the bottom of the rad has the already cooled water and therefore you wont get much heat out of that, where as the hot water at the top you can get a lot more out of.

Make sure the water return for the turbo feeds into the rad inlet or the pipe that feeds the rad inlet. I had issues where the hot water from the turbo was going back post rad which meant that the water would take path of least resistance and circulate round engine then turbo then engine then turbo.

Next on the list is a proper shroud on the rad so the fan pulls air from the whole rad not just the small circle the fan is attached too.

and if you still have the problem you could try a small electric boost pump to have on the same circuit as the fan. So when the fan is running you get twice the opportunity to cool the same water.

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PostPosted: Thu Jan 15, 2015 1:59 pm 
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how has the rst fan worked?
bit of a mod i did to mine when i've used them is to remove the fan from the bracket held on by 3 nuts, you can then remove the little spacers and replace the nuts. this will thin the fan down by approx 5mm, not much but helps avoiding moving the rad any further than you have to.

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PostPosted: Sun Jan 18, 2015 11:18 pm 
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I hope this makes sense but from your thermostat housing the little 16mm oultet runs round back of engine into your heaters and thn back out of the heaters and "usualy" goes to bottom (waterpump) pipe and back into the engine effectivly puting uncooled water back into the engine.....try this

From stat housing to your heaters then out of your heaters to raditor "you could add 16mm conection to ally rad near top rad hose easily enough or have it going into water swirl pot" then it will go through radiator get cooled and then back through engine effectivly puting cooled water into the engine now not uncooled ?


Seam sensible or a load of bollocks iv just babled ??

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PostPosted: Sun Mar 01, 2015 1:17 pm 
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Got this all sorted now and running sweet

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PostPosted: Mon Mar 02, 2015 12:48 pm 
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So what did you do then lol!

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PostPosted: Fri Mar 06, 2015 11:43 pm 
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After many months of pissing around and nearly given up on break in the car lol
I just put an RS fan on and it all worked fine lol and a bit of water wetter

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PostPosted: Wed Mar 25, 2015 12:58 am 
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this is the same problem ford had when building the
escort rs turbo and fiesta rs turbo

this is simple problem
hot air rises in the engine bay the bonnet works like a lid keeping the heat in
when the fans are running and the car isn't moving its pushing more hot air in the
engine bay heating up the engine more and more

when car is moving the air flow under the car pulls out the hot air

to cure this fords put bonnet vent in ever side if the turbo
you have a hole load of engine in a very little space

crate more air flow removing the hot air from engine bay
bonnet vents
prop bonnet open 1 inch at latch end

to prove im right is very very easy use a k type thermocouple
test under bonnet temp by inlet manifold away from the rad
when car is moving and when car is sitting at idle over heating


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