Well, using the default set-up and taking the car to Kansai (P session with newly green track) as you suggested, I found the car incredibly pleasant to drive. It is not one of the vehicles in the game that has "heavy FFB" (like the Group A); the rear-end is planted in all situations where you would want it or need it to be (over-cooking T1 and hitting the curbs; through the esses; Spoon curve; flat through 130R); no braking issues...overall one of the best formula cars in the game based on what I have driven lately (many have issues still). I have no idea if your expectation for lap time is plausible given the latest physics and live track changes. We never know how well the AI are calibrated, but they are nowhere near 1:37's. Could you just try going in a normal P session (I had 19 AI) to see if there is any difference at your end? Maybe there is something affecting the TT cars or environment? If you say the P session car is as you describe above, I will then try TT here to see if I can notice any difference. But based on driving it twice in the last two days, the F-Classic G3M1 is definitely one of my favourite historic open-wheelers in AMS 2!