I ran a 12.3 the second pass I made with the car being awd, on 24psi (becuase of the 91 I was forced to run). I have only made about 6 more runs since that, some with up to 28psi (with proper 94 this time). But with a slipping & dragging clutch still managed the same 12.3, also doesn't help when you miss 4th a couple times