This never made sense to me. I was messing around with tyre pressures in the Lotus and found that if I run with 30 psi at the front and 31 psi at the rear, I was able to achieve faster laptimes than with the default settings of 26 and 27 . In all sims I've played, I've always understood that if you want more grip, lower tyre pressures but with the Lotus in AC, I go faster with higher pressures. I did think that perhaps it's linked to the fact that with higher pressures, the car would technically be more responsive, similarly to stiffening suspension so maybe that could be it?