Hi Rick,
Glad you are having fun. I always enjoyed my time at BB very much. You should be able to run in 5th gear with no worries about temps. You are not running that many rpms at 140. Are they holding practice on Hwy 285 or on Hwy 90 this year? I was interested in your description of your corner you attempted a little too fast. There is another pedal just to the left of the gas pedal called the brake pedal. It is not illegal to use it every once in a while. Just set your car up tight and it works just fine, even part way thru a corner.

I am just teasing you. If it felt like the rearend of the car wanted to come around when you let off in the corner, either raise the air pressure in your front tires or lower the pressure in your rear tires to tighten up your Z. You could have as much as 2 lbs difference front to rear. On the other hand, if you were turning and the car wanted to go straight, then the car is too tight and you do just the opposite on the tire pressures. That is what the practice is for, to adjust your car to get it where it feels good. Don't go too far though. You should be close to the recommended pressure for your tires. If recommended pressure is 33 lbs, then 31 to 35 is OK, depending on what you need. By the way, your instructor did you no good service telling you to run in 6th gear. You were way too low in rpm and had no power to make the car do what you needed. You can change the tightness of the car thru the gas pedal. Applying power in a corner tightens up the the car by putting more weight in the rearend and conversely, letting off applies weight to the front end and loosens the car up. I am sure you know all this, I am just reminding you. Remember to relax. Tell your navigator to remind you every few miles to relax. At those speeds, BB is a blast. Remember to have fun. If you are trying to win a trophy, remember to save a few seconds so you can get the car up to tech speed in the last 7 mile straight going north back to Ft. Stockton. If you are too far ahead on the clock, you can't do that. The last left hand corner at the end of the 7 mile straight is a fast corner and then a .9 mile straight to the finish. I have taken that last corner over 160 so you should be OK at any speed up to your tech. If you are not interested in winning a trophy, then it becomes much easier to just go out and have fun.
Please do me a favor, tell Don Preston (Red 90 ZR-1), Ted Zeleski (Black 90 ZR-1), Dabney Crump, and Mike Powers I said Hello.
Curtis Ward