So yesterday after my 5th session at an HPDE I packed up and jumped in the car to leave. I rolled out of the garage And heard a muffled metallic shotgun like pop. I got out to check my car and both front rotors cracked from outside edge to the hat. Inside and outside surfaces. I will post photos if anybody can tell me how.

Centric rotors with about 6 hpde
Xp10 pads
No ducting
Always do cool down



I was checking temps yesterday, about 960 coming off track, 500-550 after cooldown. Has anybody had failures while on track?

 

This is a common problem with the S especially with these colder winter months. Rotors will primarily crack in the paddock as they cool down and not while on track. It's probably better to NOT do a cool down lap if the ambient temps are cooler.

 

I always wondered about doing an extended cool down... like going down the highway for a few minutes to get more even cooling without any braking.

 

6 events is pretty good seems like I'm losing one every 2 events lately

 

Has anybody had on track failure or heard of it? If I need to replace every few events thats fine, if they fail ever on track I want another car.

 

They wont fail on track. The problem is when you come in, the rotor temps start dropping, that is when they crack. But yeah, unnerving for sure. A lot of the "hardcore" track guys hate on people that use two piece rotors or BBK because of the extra $$$, but its a good piece of mind, and if you track often enough for long enough, you could potentially end up saving some $ in the long run.

 

My rotors have always broken after pulling on track, during cooldown. Hot weather sucks on-track, but they seem to break less often.

 

I've been thinking about this. BBK rotors are way more expensive than I would have guessed.

Napa rotors are around $40 each from what I remember. BBK rotor (re-use hat) could run $300-$400 each. That's about a 10x cost difference. If a BBK rotor lasted 10x longer, then cool given the time savings and peace ofmind. But I'm not sure that they do last 10x longer.

And to be safe, you'd want a spare set of BBK rotors. That means you have $600-$800 in brake rotors sitting in your garage as spare.

$$

 

Stoptech BBK rotor rings were $250 per front corner for 332x32 BBK that I used on my Evo.

 

For the most part yes. As I said, in the long run you could end up saving money. At the rate people are cracking rotors, especially in the colder climates, I don't think its out of the question at all for a quality 2 piece rotor (PFC) to last 10x longer than an OEM unit.

At the very least you will save time, have a piece of mind, and have a better brake performance. Pads seem to wear more evenly with a BBK (less caliper flex)

Don't want to turn this into another BBK vs. OEM thread, but IMO

Are the stock brakes adequate for tracking? Yes

Is there room for improvement from a performance stand point? Absolutely

With that said, I tracked my S2000 for years on stock brakes, many times on stock pads (I know blasphemy).

-Dino

edit:

Napa rotors are $43 plus tax = roughly $47
Stoptech $250 plus tax = roughly $274

That means that if they outlast the OEM units by 6x, you are in the clear.