Originally Posted by DrDomer
Can buy a dedicated track car and a used TAG Kart for $15K. Both will be faster for Autocross than a semi-stripped luxury sports sedan.
I understand what you're trying to do, but it seems just too hard.
This was really an exercise, which quickly revealed that it's not worth it. I am indeed looking around for a dedicated track car, but I'd still like to take another 50 lbs off via wheels and exhaust from my DD. Those are solid mods for other reasons, and should cost me around $6k.