erm ok then i'll give you a better idea.
225/40/18's are 30psi in third gear.
Ed's S14 Drifting at Awesomefest - YouTube
i don't fancy running 245's.
plus you aren't gonna give it death are you with daft wheels. not next to curbs like i do 3 times a week. your just missing the point of drifting and getting too carried away with how blad your car looks. not for me