At ultimate street car a mate did consistant 14sec 1/4's could not get better after about 6 runs.....
The car was running 20" wheels with 305/30/20 tyres!!!!!!!!!!!!!!!!!!!!!, but this was a cabriolet (more weight i guess) and it was delimited (not that it should matter on the strip).
The owner was pissed as he could not better another mates time from japfest for a celica GT4 he did 13.9 with 280bhp.