Upgrading to larger rims, especially in your case with two
inches larger, can result in significantly slower acceleration
times because of both the increase rotating mass (most effecting
area in gaining/ losing weight is the wheels/ tires) and increased
rolling resistance from resulting larger tires. So i would say 8.2
is about accurate, while a .7 second quicker time can be expected
realistically from a stock car. If you want to regain your stock
times with these large rims, you might need to push up power
slightly via a replacement ECU or similar basic
modifications.
My quickest 0-100 km/h time was recorded recenetly with 29'000 kms
on the odometer, at 8.5 seconds timed by clock, with two people in
the car.
