It's more than once stated that AC's FFB with all effects to zero, are 100% generated by physics calculations . The forces come from 2 sources. 1. Tyre load = resistance. This comes from weight, aero and mechanical trail. The latter comes from caster. 2. Suspension movement. Reading the above someone can explain why some cars feel less alive in AC. Cars with stiff suspension with low travel , while being light , without aero and maybe with low caster will give low forces. This is normal. Add with the fact that many (like me) play with a weak wheel like the G27 , with huge dead zone, will give them a not so good experience. Kunos decided not to give caster control because they want fidelity to real cars. But try a car which is soft and with big caster value like Cobra and you will get superb FFB. Add lut control and personally I will prefer the result which is natural, rattle free, full of dynamics over every other sim . AC still gives me better understanding of what rear axle does . Another favourite is the haurya BC. AC just works that way. When someone understand this and have a weak wheel , he can add some effects to help his weak wheel give more info. Not all effects are fake. Slip is fake and so is kerbs. Road effect and enhanced understeer are just multipliers from physics calculations. For my G27 I use 5% slip, 5% kerbs , 10% road, 5% ABS, enhanced understeer off, some minimum damping like 0.015 from ini to help G27 fight the rattle and of course lut to iron the outcome forces. The result is really good FFB , which has nothing to jealous from rf2. The latter still gives me rattle which i need 9 filtering to suppress and as stated still less info for rear axle and also less needing for microadjustment while turning , were in AC I always catch myself to need way more wheel micromanagement to point the car. PS: Fun fact: tried a friend's DD wheel. Differences among sims tested , AC, rf2, AMS , were actually almost disappeared. DD wheels have so much headroom that all sims feel almost the same and superb. Thanks for reading.