Looks like you had a great time! I'm sure you learned a ton over two days... and you've discovered the limits of your car (in the right place to do it).
The brakes did their job on the track but were toast when the weekend was done. I got fade once or twice the whole weekend and they were right back at 100% on the next corner. The DBA 4000 rotors were badly grooved and one side actually cracked. The Carbotech XP12 pads still had about 2/3 of their material left but had some pertrification/cracking.
First comment... the track you're on has a really long/fast front straight, so will be murder on your brakes. Listening to your tires on your quickest lap, you're definitely working the brakes towards the limits of traction on several corners.
One of the best mentors I ever had told me "sometimes, you have to slow down in order to go faster". What he meant was, simmer down, slow down the hands, look further ahead of the car, be the car instead of fight the car. He knew that corner exit speed is way more important than corner entry speed, and furthermore, going into a corner too fast kills your ability to come out of it fast.
That is extremely good advice!
yea, I pushed way too hard at times which slowed me down. Slow in, fast out is the way to go, I need to learn to have the focus and patience for that when behind the wheel.
My first suggestion was going to be trying to get a bit smoother on/off the brakes. Starting to brake a little sooner really helps with the temps, without greatly effecting your times (often it will improve them as you can focus on getting a better line for corner exit onto the long straights). You don't need to use as much pressure (= lower temps) since you're braking over a longer distance. You also had several times when you "over-cooked-it" into the corner... getting on the brakes sooner should help with that too.
I know when I started with HPDE I was jumping on the brakes really hard, often times not getting slowed-down enough before turn-in, and was over-using equipment (sliding tires and smoking brakes = no fun). Being less aggressive with the braking made me faster and much easier on my equipment.
Also, while it's not a beginner technique, I'm sure the topic of "trail braking" will come-up soon. Being smoother with the brakes, longer, and trailing-off towards apex will help the brakes and should also help with the mid-corner understeer it sounded like you were having at times.
I need a better solution for the brakes before adding power though.
Great plan! Most people I've talked to associate with HPDE say that power is always the LAST thing you want to add. There is much more time to be gained (on most tracks) in the corners with better tires/suspension/brakes. Adding more power just taxes the other components (aka. brakes) more at the end of the straights.
Looks like the XP12's were a good choice for pad, and the ATE was a good choice for fluid. You probably have enough rotor mass to do the job, if they have proper cooling. What I'd do next is figure out a way to duct air into the center of the rotor hat.
Yup... this is what I was going to suggest as well. It sounds like you're not melting your pads (so don't need a higher temp pad) or boiling your fluid (needing a higher temp fluid), just over-heating the rotors.
There are a couple people who are working on brake cooling ducts, but there is not currently a "kit" available. The process doesn't seem to be too complicated though... I was looking at using our brake dust shields as a starting place (like this Camaro owner did), but haven't had time to play with it lately.
A larger rotor should help, but that's an expensive upgrade (especially to work inside most 18" wheels). I would also avoid drilled rotors, since they can be a place for cracks to propagate. Getting "cheaper" rotors that can be replaced more frequently is often the best solution for track use.
here's what happened at the end of the weekend, brain went to mush and my driving went to crap, resulting in a spin.
I've always been shocked at how mentally draining track days are. At one of my driving schools they always ran the last session at a slower pace... focusing on running the perfect lines. Not only was it a great way to solidify the proper line, we avoided pushing our brains beyond the limit and make mistakes.
Ok, after all that... when's the next track day in my area!?!