Uniroyle rain sport 3 winter track pressures please.

[330ti]

Hello all, can anyone recommend good tyre pressures for rain sport 3 for winter track days ? Car is RWD about 1250kg / 230 hp . I'm talking Jan Feb cold wet or greasy conditions.
245/40/17 rear 225/45/17 front . Cheers.

[E-bmw]

Just start with standard cold tyre pressures & after a few laps come in, check the pressures & drop back again.

Do this a few times until they stop going up.

You will probably end up around 6 to 10 psi down when they go fully cold after use, then use this for your bench-mark next time.

[wellground]

The problem with winter track days is its much colder. I have had quite a bit of experience of this.

If you start with standard cold pressures, the tyres will struggle to get to optimum temperature. So, the lack of temperature does not allow the tyre to get to the desired hot pressure. I tend to start about 2 psi higher than a standard cold setting. In my case with my car, in normal temps.

I start at 28 cold on a dry day, looking to get about 34 psi hot, dropping pressure if needed to attain that. That suits my tyres on my car well in the dry. In winter on wet cold days, I will start at 30 psi cold start temperature, still looking to get 34 psi hot. In my experience this will give you the best wet tyre feel. But beware if it dries out, your wet tyres will increase in heat and pressure very quickly, find lots of puddles, or they will fall apart.

Hope that helps

[330ti]

Thanks for replays you two 👍 That's what I'm doing in dry / warmer conditions with semi slicks. Because the rain sport side walls are very soft I though more pressure might be good ? I'll start with around 34 psi then and try and keep it around this number and see what they feel like.
Any other rain sport users views welcome. Cheers