Originally Posted by VMcV3y
I've taken my 100% stock E93 on three track days this year.
Each time I've gotten better lap times.
Until you've bottomed-out and aren't making any improvements, why spend any money for modifications
At the last track day, I learned enough about the car to start wondering what would be next:
I can tell you, though, that it will be track-only tires. I have 16,000 miles on my 18" wheels and the wear-bars are now flat-on the tire. Basically, they're done. These were Mich PS2's.
Fortunately, previously I bought a set of spare set of 19" wheels/tires, and those are the daily driver as of last week; and I'll buy track-only tires for next season and toss those on the 18" wheels.
So my relatively-inexperienced advise is: keep it stock until you can't get better times; and then get ready to spend money on tires.
Just go have fun!
Great advice. Any idea what tires you're looking at? You should stick to street tires until you max them out before R-compound.