stock calipers and some aftermarket (Porterfield Rotors and Pads) stuff and some clean fresh fluid.
So yeah, we worry brakes!
BTW Ron I got to get with you about the SCCA but I keep forgetting to PM you.
Hey Marc,
What kind of fluid? That is the key.
If you aren't using something like Motul 600, or Castrol SF (the later is about $80 a bottle, the former about $16 a pint, or maybe 1/2 pint) then you should. None of this stuff is available at any parts store, except a race shop or track shop. If you put that fluid in the morning of your track day, bleed out all the old stuff, then I don't think you'll have any boiling issues. There are a number of guys running C4 vettes at VIR with standard brakes and no issues, but they're all over the bleeding and fluid stuff as Big Foot says each morning. I'd imagine that will solve your issues.
Now, if you are already using that fluid, and really changing it the morning of the track events, then you'll need to do more with duct, heat sinks on the pads, and possible thermal isolators that go beyond what BigFoot has posted. I'm getting ready to put these on my Z car to help out, and they might make them for Corvettes:
Fade Stop Brake Heat Sinks
I have a set in the garage and they are well developed and fit in perfectly into the caliper.
For us racing these cars with solid discs, small calipers, and abusing the heck out of them, a race morning AM purge with fresh Motul is standard operating procedure. After the races we measure the caliper temps and routinely get in the 400F-550F range and even higher sometimes (my pyrometer quits at 550F, once measured that high when the TR8 had some issues but it still stopped fine that session, this was pre ducts). Seals are important and need to be fresh, and up to the task.
But, we don't have fluid boils and maintain brakes throughout a 30 min sprint race with heavy abuse. The times when we've not done the bleeds with new fluid we get boiled fluid, or blown out brake seals, or both and it happens in a few laps.
R