So I blew my engine over the weekend

[PercentSevenC]

My experience with the 5" has been rather underwhelming. Jeff's setup with the -7 pulley (and I think he'll agree) wasn't all that powerful, especially at the low end. My friend's 5" with the -10 pulley was better, but honestly I think my car has at least as much power now with the 7" and -7, and my throttle response actually seems better (granted, my flywheel is a couple of pounds lighter). The only reason I would use a 5" is if I was limited by the space in the engine bay.