How many seconds do you think such a mod will help acceleration ?

[nurburgring]

Currently, I'm on 195/50R 16s, 16x7" rims. Probably 11 pounds or so a rim. I'm also on stock pulleys.

I have little to no intention of compromising reliability, so I will not go forced induction, whatsoever. WHat I'm keen in is, to increase efficiency of power delivery to increase acceleration.

SO...

What if I went, 195/55R15, 15"x6.5JJ 9lb rims. This will reduce rotating mass by over 6 lbs inclusive of a lighter tyre. I will also change the pulleys to one of those lightweight aluminum variants. I will change my engine oil to 0w-40w Mobil 1. And if need be, thicken my autotransmission oil, and remove the 20kg or so sitting in my boot.

Do you think I will be able to reduce my acceleration from the current 11. something seconds to a sub ten ?

I have no intention of a cold air intake, because frankly, I've got that route before and I think in an automatic, it sucks. A big torque hole.