A better radiator.

 

Trying to find one - but the one i find are thicker but same frontal cross section - the mechanics (multiple) says You will get more liquid into cooling sytem but efficiency of getting rid of the heat will not increase so problem will not be solved.

Have You had similar problem and used larger radiator (cooler/heat sink)?

 

If you don't want to change any hardware, try this:

High Performance Coolant | Evans Waterless Coolant

Evans Waterless High Performance Coolant increases engine reliability and eliminates many issues associated with water-based coolants.

www.evanscoolant.com

How It Works | Evans Waterless Coolant

Learn how Evans Waterless Coolant works to protect your engine as the only 100% waterless coolant on the market.

www.evanscoolant.com

 

Many thanks - I was thinking about this. Shall i dump all current coolant and use their water "eating" liquid before filling the cooling system with EVANS coolant or just replace the
standard coolant with EVANS and do not bother myself with some leftover of old coolant?

 

What intercooler are you running?

 

A bit larger than standard (looks more less like this: https://fmic.pl/intercooler/46766-7770-intercooler-ford-focus-st-25t-225ps-mk-ii-tuning.html)
- mounted by previous owner - shall i return too standard?

 

Oil cooler would help greatly, especially if it is thermostatically controlled. Bonnet vents would help too, or bonnet risers to let the heat escape.

 

Oil cooler would help greatly, especially it it is thermostatically controlled.

Thanks for advice - very interesting proposition.
I have not modified thermostatic system so probably it is thermostatically controlled.
What you think about these oil cooling systems?: (google chrome may be helpful in translating descriptions) but maybe photos will be enough:

https://www.iparts.pl/czesc/chlodnica-oleju-silnikowego-nissens-90714,0-123-90714-934702.html#100108

https://allegrolokalnie.pl/oferta/focus-st-rs-mk2-2-5t-305km-chlodnica-oleju

Shall i go with biggest possible dimensions?

 

If you're worried about heat on track days, best get an idea of oil temperature as well.

Considering the oil cooler is cooled by water, dumping more of that heat to atmosphere will ease some strain.

And thicker radiator may not be drastically better, but holding more fluid with more surface area will still help it take longer to be saturated with energy- and dissipate it faster- given the confinements of the engine bay.

And if it's a track car, possibly removing or relocating anything that blocks air flow could help. Namely air con rad and bumper plastic.

Depends how far you want to go.

And I'm not sure how much good extra fans are, considering they're in front of the radiators and when the car is moving there is a lot of air being pushed through the front- have you got bonnet vents or a bonnet riser so the hot air has more routes to escape?

 

Totally agree kiemuloly..
IMO, a temperature of 105 degrees celcius is not abnormal, in circuit use. It is from 115 degrees that you have to worry. At 120 degrees, the engine management system switches to limit strategy.
The use of EVANS waterless coolant does not improve cooling, this liquid allows the temperature to rise higher than water + antifreeze, before reaching its boiling point.
To reduce the temperature, there are several solutions, on a track:
Put the heating on maximum. (we lose 3/5 degrees) It is difficult to support in track session, but it is efficient.
Replace the water + antifreeze mixture with pure water. Pure water is more effective than the water/antifreeze mixture.
Reducing the oil temperature by installing an external oil cooler (with electric fan with manual switch if possible) is more efficient than the water/oil exchanger. It is not necessary to mount a thermostat.
Remove the air conditioning radiator.
Last possibility, the least simple, but the most radical: make cuts through the front crash reinforcement and cut air passages in the front bumper.

 

Track on which I am usually racing is around 1000m long and after after 3 laps temperature goes from 90 to 100 to 107... and I go for cooling round to avoid overheat - maybe lap more could be done.

So far no holes in front (hood/bonnet) and front bumper... but looks it is on my way to be made.
I will start with oil coolers - any suggestions where from take better one (than standard)?

 

I had the same problem of the engine getting hot and throwing up a warning light. I already had an RS oil cooler, alloy radiator, stage 4 intercooler and bonnet raisers. I ended up fitting a turbo cooler following this guide and I've not had any issues so far, so definitely seems to have helped - Turbo Cooler Install

 

As said get some bonnet vents, we used a hole saw on the bumper of the track Fiesta and channel some air through fog lights. Could also water meth it that will cool it.

https://www.focusstoc.com/attachments/image-jpg.884475/

 

I guess it comes up to how far you want to go and how you use your car + what mods it has
For normal use + some track days from time to time I would put a bigger intercooler, 40mm radiator and an rs oil cooler. Maybe bonnet raisers for hot track days only. If you use the car mostly for track days than you can look into an external oil cooler, aircon delete kits, chop the bumper and the bonnet and so on. From what you`re saying I would start with the 40mm radiator and the rs oil cooler as are not adding complexity and prices are reasonable. Also make sure the added fan is not restricting more than helping.

 

Thanks a lot for the answer.
Regardoing RS oil cooler. I made a short research and i have found that
1. RS oil cooler and ST oil cooler in mk2 generation (not facelift) have same dimensions - so their cooling efficiency should be the same (if there is no difference in materials)
2. there are special spacing/separation plates for oil-coolers (RS/ST) - why we need oil cooler separation (on photos it looks like 10 mm maybe 15mm) - whats the purpose ?

Kind regards STan and many thanks for help