didnt put 2 and 2 together, QR being Queensland Raceway? if you are doing more than 1 lap, then the tyres should get up to heat pretty easily. if understeer is an issue, then it could be the tyre warming issues, or even just too high pressure. I dont get much understeer now, pretty much zero, ive got a massive front swaybar on the most aggressive setting whiteline offer in the adjustable.. biggest issue is oversteer/ 4 wheel slides when the tyres are cold. try some lower tyre pressures to see if that helps 36 would be a good start in the front