If you are worried about having enough brakes, you could switch to the Toyota 4x4 brakes and braided lines. That is a definite improvement. High boiling point brake fluid is also a good idea, but if you have fresh DOT 3, you should be ok. Start out with the tires at about 32 lbs pressure. Most tires have a little ^ near the edge of the tread. Take a bottle of white liquid shoe polish with you place a white dot over the ^. When you come off the track, look at the dot and see how much of it is worn off. If the dot is worn away right up to the ^, then your tire pressure is probably pretty good. You want to see your tires rolling over right up to the ^. Have fun, and like someone said, drive within yours and the cars limits. You don't want to wad up that pretty Z! Marty