Cooling modifications for track work on B5 RS4?

2.7 V6 30v biturbo - 380 bhp
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Emp2k
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Cooling modifications for track work on B5 RS4?

Post by Emp2k » Sun Dec 30, 2018 3:19 am

Hello there.

I have done some track driving with my RS4 but it gets pretty hot pretty quickly.
After a couple of laps the water temperature is starting to creep up also.
I'm betting there are others with the same issue? What have you done to solve it?

I emailed MRC but haven't had a response yet, i'm guessing they have reduced staff with the new year and so on.
It would be helpful to get some more input also.

Shockerboy
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Re: Cooling modifications for track work on B5 RS4?

Post by Shockerboy » Tue Jan 01, 2019 11:46 pm

Maybe the Rad needs cleaning or replacing . with age they do get build up which slows the flow through , also check or just routine replace the thermostat it may be blocked or sticking as well ./ avoid using the aircon on track as that increases temp as well .

Emp2k
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Re: Cooling modifications for track work on B5 RS4?

Post by Emp2k » Wed Jan 02, 2019 1:43 am

Humm good ideas and good feedback the car is abit old now so it could be that a new radiator would be an idea. Perhaps a aftermarket one and then an aftermarket oilcooler also?
If i want to change to a cooler termostat are there anyone that has done so already and can chip in with the results?
Also am i the only one having this issue?

Edit:
Could this fit perhaps?

https://store.034motorsport.com/thermos ... d-vr6.html

IchBautAuto
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Re: Cooling modifications for track work on B5 RS4?

Post by IchBautAuto » Sat Oct 12, 2019 2:20 am

Try a full alloy radiator. I use a CSF Radiator 7071 and you need a separate gearbox oil cooler. A 80 or 87 degree thermostat may also help.
C5 RS6, Milltek and Wagners: B5 RS4 450 + HP: A4 1.8 GP TQS original: C5 allroad: 1963 UNIMOG 404: All up and running.

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Nige_RS4
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Re: Cooling modifications for track work on B5 RS4?

Post by Nige_RS4 » Sat Oct 12, 2019 8:15 am

I'm guessing it's your oil temp that's pushing the water temp up. The lower pipes are known for corrosion so you may as well replace it with a better/bigger version ... https://www.ebay.co.uk/itm/232751603156
CheeRS, Nige

B5 2.7t S4 - gone
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Emp2k
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Re: Cooling modifications for track work on B5 RS4?

Post by Emp2k » Tue Oct 15, 2019 9:49 pm

Awesome, seems to be for s4 though? Aren’t the rs4 oil cooler connected to the rs4 radiator?
Perhaps a more efficient radiator will make the stock oil cooler work better?

I’ve heard about people getting a gearbox cooler do you have any suggestions?

Awesome tips! Really nice :)

IchBautAuto
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Re: Cooling modifications for track work on B5 RS4?

Post by IchBautAuto » Wed Oct 16, 2019 7:22 am

The RS4 engine oil cooler is in front of the radiator, the Gearbox oil cooler is in the side of the radiator, just like an automatic. You can use the OE engine oil cooler or an aftermarket unit with the alloy radiator but you would need a separate gearbox oil cooler.
C5 RS6, Milltek and Wagners: B5 RS4 450 + HP: A4 1.8 GP TQS original: C5 allroad: 1963 UNIMOG 404: All up and running.

Emp2k
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Re: Cooling modifications for track work on B5 RS4?

Post by Emp2k » Tue Nov 05, 2019 10:24 pm

Ahh i see, many thanks for the tips :)

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