Depends if its FWD or RWD H15 FSC

For all the PM's asking me what pressures to run.... I don't know, every car/tyre combination will be different.

Try 1 run with them up, try 1 run with them down, swap fronts to back and backs to fronts if you have different compounds. Take note of the weather and tyre condition (hot cold etc) Start a log book and record YOUR findings and stick to what your happy with. I can guarantee that it wont be the same for the person behind you so its impossible to say what any optimum pressure will be..

Thats why they operate run what you bring days, so you can try out different ideas to find YOUR optimum, then you just put it all into practice on show days.

Just go and have fun if you havn't got as far as doing all that yet.