I ran a 13.8......need lower gears thou or smaller tires cuz i was only in 3rd gear across the finish line. but first time out, couldnt luanch it at all,completely stock engine with little turbo slapped on it.. 13.8 not bad........oh and i was only running 7psi... with the 22'' slicks and some smaller injectors itll run low 13's on 7psi all day long