it really depends...there are so many different kinds of turbos on sc's. the size of the turbine is what makes the power curve. big turbines wont pick up right away. smaller ones (greddy turbo and jrsc) will. so, those have better low end. t3s and t4s and vortec sc's dont pick up till higher revs. imo get an apex or t3/t4 setup if you want top end.
a mildly tuned SOHC motor (like mine) with an apex will run very low 14s without an afc or dyno time. a b16 must be crazy...prolly low to mid 13s with just bolting the damn thing on.
boost is da bomb!!!