Your average SS can only run a 14 second qtr mile... Auto or manual...
The older ones are even slower again...
A few mild mods and an SS runs 13's but it gets pretty expensive for an SS to go faster than that... (ie. Cam, head work, forced induction etc)
Now an R34 auto with a few mods would be able to run a 13 also maybe even a high 12 with some sticky tyres and a good 260rwkw as Dan suggested...
Is this what you needed to know???
(Note: I actually own a VE SS as my current daily. Its a 6 speed manual and has about every mod you can do without opening it up. It runs a 12.9 on street tyres at street pressure and pump fuel. Now my mate owns the same car with the same mods, even the same tune but his is auto. He runs a 12.4 so in VE SS land the auto is faster than the manual.
The differences in our times is as obvious as the 60 foot time, the auto launchs much harder without wheel spin than the manual... The ESP control in the manuals prevents you from over powering the launch, yet does not help if you under power the clutch dump, so you need to be perfect... As where the auto allows the driver to just step on both pedals and let go of the brake when the light goes green. The ESP then gives the transmission the exact amount of power it can handle without wheel spin, hence a much faser 60 foot time and over all ET...)
Food for thought...
PS> Dont be tempted on the streets, take it to the track... Time slips are better than fines...