I dont remember any lag. I always rev'd and popped the clutch. Remember a supercharger is rpm dependant. Yes a supercharger uses power to make power and turbos are more efficient, but once again how much does a good turbo setup cost? How hard is it to tune a turbo car? Leon send me your email address and I will show you a good video of a Centrifical Blower on a Z06 against a KB car. Thats if your mailbox can take a big enough file..