With or without prep it sounds like you have a issue that can be fixed some answers on here should help alot if not maybe your cart is bent [hopenot] but even that can be fixed soco must sell alot of prep if hes got some that will fix this lol! Waj....
Tires bite more it creates less friction, less friction creates less heat and those two together equal tires that last longer. As SoCo said he needs to get more bite in the tire and that will be achieved through prep. Pretty simple answer JIM D
Maybe he likes the 206 class for cost reasons on the motor, I have no idea what his reasons are. To be naïve and think you aren't racing against chemical because "you aren't allowed" is silly to me. How are they teching that? Smell test? Sniffer? Labs? Durometer?