Re: Brake fade on the track
Autobahn South is pretty hard on brakes, but not real bad. Blackhawk is much tougher on brakes IMO.
The symptoms that you describe are definitely fluid related. Ate Blue is a decent fluid but there's better for not a lot more money. Motul RBF 600 or 660 has a considerably higher boiling point and doesn't stain your reservoir. Actually if you want to be economical, the Ate Gold is the exact same stuff as the blue w/out the dye.
But honestly, changing to a different fluid is not the answer because it doesn't address the problem. Brakes have to manage heat. That's what they do. If you can reduce the heat getting to your fluid, it's a win. There's different ways to do it.
Pads are a very important part of it. First, Hawk HP Plus are not full on track pads that can handle the abuse of a Z06. You need a high heat tolerant pad to deal with the extreme amount of heat generated. Carbotechs are a good example of the required pad. The braking needed for one of these rockets is substantial. So you can't go cheap or compromise on pads. Since the energy to stop the car quadruples if you double the speed (say 50 vs. 100mph) think of how much energy is needed to stop these somewhat heavy 500hp beasts. A lot! So you can't count on basically stock components to last a long time on the track.
Cooling. So many people think big brakes are the key to better braking. Yes, but only when you've exhausted your cooling options. Just using good fluid and pads isn't enough. You have to help the brakes do their job by getting cool air to the brakes. The vented rotors can't do it all by themselves. You have to help them by shooting air at them. It can be something as simple as a plastic scoop or duct. I know friends who use shop vac attachments!
Or if you can't get the cooling routed very well (many find the scoops get torn off on curbs or off-track adventures- stay off the curbs and drive better?) you can plumb hoses to the brakes and feed the air with inexpensive fans. Check out butlerbuilt.com for lots of good air scoops and cheap fans.
Getting cool air to the brakes also helps them last longer. Sometimes adding a cooling setup can be expensive but it ends up paying for itself in the long run by saving you the cost of replacing pads and rotors less frequently.
A big part of it is also technique. You have to get used to getting on the brakes quickly and brake HARD early on in your braking. The longer you brake, the more work you are making the brakes do. A shorter, harder braking event is less work on the brakes than is a tentative effort over a long distance.
Brake fluid lines are one of the most over-emphasized "needs" for track use. You don't ABSOLUTELY need braided brake lines. Their improvement is arguable. Plus the braid hides any sort of aging or damage that may occur. They're best replaced every few years to make sure the braid doesn't abrade the hose (yes, the protective sheath actually can damage the hose itself) or if you bought cheap hoses, the hose isn't deteriorating.
I found some good information recently on an Alcon brake website. Not to mention they have some great looking and performing brakes.
Sorry about teh links to non-supporting vendors. Good tech information nonetheless! Just don't buy the brake kits if you wanna support Z06 forum vendors.....
This is a very good way of getting banned from the site on your first day!!
You were aware of the rules and ignored them anyway.
Next time you're gone....
'89 C4 Z51 ZF 6spd
Last edited by MikesZ06; 11-19-2012 at 01:09 PM.
Reason: multiple links to non site vendor