[vath2001]

If I was ever to race / autocross, I would make the car loose weight:

As small of a battery I could install - yes, a lawnmower battery
Remove the easily pulled carpet - including engine covers carpet (no tools req'd)
No spare or tools
1/4 tank of fuel - max
Only a drivers license and insurance card
One key
Pull the wind deflectors (un-clip)
Nothing in the pockets, doors or trunks
Remove the radio display

And I feel like wrenching: no Pass seat (4 bolts, need a star socket set)

The battery would take the most time to set up, everything else could be stripped in an hour. When you race, weight is everything.... if you don't race, set the car up to be comfortable. You have decide on which side of the track you want to live.