cheers. the car controller is NWH vehicle physics, it's a pretty great asset (IMO) with a lot of flexibility... little realistic but you can mess with it to get more arcadey feel like I did.
I think the real lag is coming from the physics and the amount of enemies. Definitely needs a lot more optimisation.
Carmageddon was definitely my primary inspiration, i dont feel like anyone's really done it right since, they always concentrate on the cars smashing cars, and not the cars smashing pedestrians.