Sorry to revive an old thread. I've seen people post times of 13 to 14 second 1/4 mile times on GTST with just BPU bits added.
My question is, was these on prepped tracks or not?
I ran a 14.4 with my GTST on an unprepped track. with 18" Semi slicks it spins all the way through 1st, 2nd and most of 3rd.
I'm sure that with proper traction I could do a low 14 to high 13 second pass.