Brake rotor wear after 3 track days

[sds]

Originally Posted by Edkwok99

Yes. I know how to turn everything off.
But I am not ready yet

If you're not ready yet, don't drive on RT660s.

[staples323]

Originally Posted by Edkwok99

Yes. I know how to turn everything off.
But I am not ready yet

All good, I misunderstood. the vsc in track mode is probably still activating causing a bit more heat than usual in the brakes. The crazing doesn't look bad. Pad material seems to be glazing the disc a little bit from the excess heat though, I'm not entirely sure without seeing the pads.

[Edkwok99]

Originally Posted by staples323

All good, I misunderstood. the vsc in track mode is probably still activating causing a bit more heat than usual in the brakes. The crazing doesn't look bad. Pad material seems to be glazing the disc a little bit from the excess heat though, I'm not entirely sure without seeing the pads.

No worry. You are right. I need to turn everything off and experience the full dynamics of the car.

[dsc_pat]

looks fine

did you engage a lot of the abs ?

[staples323]

Originally Posted by dsc_pat

looks fine

did you engage a lot of the abs ?

Originally Posted by Edkwok99

No worry. You are right. I need to turn everything off and experience the full dynamics of the car.

dsc_pat makes a good point too, if you're getting into abs a lot.

[Edkwok99]

Originally Posted by staples323

dsc_pat makes a good point too, if you're getting into abs a lot.

I don’t think so. I had not seen ABS light flashing on dashboard at track. I also didn’t feel the front tire not griping during hard brake.

I don’t think I used the full capacity of the brake. I think it is the repeated medium braking instead of multiple hard braking.

[NoHaveMSG]

Normal from heating and cooling cycles. When they get to the edge or you can catch your fingernail on them, time to replace. You should see the pictures @CSG Mike has posted of ones he has used

[gen3v8]

So now you know your brakes are normal for what you`re doing and probably don`t need replacing yet. Get a driver mod (Best bang for buck)

[CSG Mike]

Originally Posted by Edkwok99

Thanks for all feedbacks.

Does that mean the pad is too aggressive for the rotor? Or/and the rotor exceeded operating temperature?

If I upgrade to a better performance rotor, will the rotor have heat checking again from track use?

You've badly overheated your pads. (the uneven streaking)

Step up to a higher capacity pad, and also, make sure you're not using ABS.

I've seen many folks who swear up and down they're not using ABS, and then when we (finally) look at the data, they're basically standing on ABS every braking zone.

[CSG Mike]

Originally Posted by Edkwok99

I don’t think so. I had not seen ABS light flashing on dashboard at track. I also didn’t feel the front tire not griping during hard brake.

I don’t think I used the full capacity of the brake. I think it is the repeated medium braking instead of multiple hard braking.

ABS engagement doesn't flash an ABS light.

If you have an ABS light, your ABS system has faulted or failed, and you will get lockup.

[soundman98]

Lol, My phones news feed directed me to the same thread with the same pictures on the gr86 forums.

Similar result, without the ABS talk, or csgmikes insight!

[Edkwok99]

Originally Posted by CSG Mike

You've badly overheated your pads. (the uneven streaking)

Step up to a higher capacity pad, and also, make sure you're not using ABS.

I've seen many folks who swear up and down they're not using ABS, and then when we (finally) look at the data, they're basically standing on ABS every braking zone.

I didn’t feel any brake fade at all. Brake pedal was firm all day.

[Spektyr]

Another thing to keep in mind: the car actually measures how quickly you go from the throttle to the brake, and how quickly you press the brake down.

Quick/aggressive/panicked transition to brakes, especially with quick application of the brakes amplifies the response of the braking system. The idea is that if you're driving and suddenly need to hit the brakes to avoid an accident the car will apply the brakes harder/faster that way.

The result is you go right to ABS levels of braking.

I had a situation where I was alongside a car at 75mph on the highway approaching construction. Traffic in her lane was stopped, mine was open, and we reached the point where it became apparent she wasn't paying any attention at all. I braked "moderately" and shifted to the left shoulder to give her room to escape the impact via the left lane and the car basically stood on its nose to stop. (She never touched the brakes or noticed the car she slammed into.)

The aggro braking system pulled us up about 10-15 feet short of the debris field.

But on a race track you're going to want the ABS turned off.

[WolfpackS2k]

How cheap are GR86 rotors? In my experience cryo-treated rotors are usually a good bit more expensive. In many cases it's just cheaper to toss your rotors and replace.