5.5 on street tires.
However to answer the question the gearing is not well suited to give good results on the 0-60mph test because withthe OEM redline it takes a shift to 3rd. Just raising the redline to 7250 cuts close to a second off the 0-60 times without adding any more power. (high 6's)
A non-SVT would not be any quicker with a raised redline because the power peaks much earlier and shorter. That out weighs the extra shift.
That's a pretty good time. You would be very hard pressed to get into the mid 5 second 0-60 time without turbo/3L etc or needing a new clutch by the end of the day 
. I've timed my summer car at 5-5.3 sec, very low 13s consistently, and that is with a 3L straigh six stroker motor (bored .30 over), tripple webbers (biggest you can get), big cam, adjusted timing (MSD), headers, 2 1/2 inch exhaust, HD clutch, tunable cascar muffler (loud), no cat, LSD diff, T-4 tranny, and racing tires. And that is with 265 hp (consevative) at the wheels and all in a 2300 lb car. The cornering is just as fun. I've pulled over 1 G on track slicks. 
