I think you are referring to centrifugal sc's becaues the b18c with a jrsc puts out awesome numbers. An ls has more torque and peaks earlier than the gsr. Turbo lag isnt that bad. "If you have no lag, you have no turbo at all" - Corky Bell If you go with a smaller turbo or a ball bearing turbo it will spool much faster but wont have as much top end kick. Its a trade off. Find someone near you with a turbo integ and check it out. See if it is for you. I love it.