i have notice that after some spirited driving on the back road, my rear brakes seems to be hotter then the front. not sure if it's a brake bias or cooling issue. after reading Rob's explanation of what happened to Cale's car, i wonder if this has anything to do with it.

i've just added front cooling ducts and also remove the rear slash shield over the weekend. i'm heading to track this weekend and will be monitoring the brakes temperature very closely.

 

The rears do run hotter. It's due primarily to lack of cooling and secondly to the fact that they're solid instead of vented discs.

 

John Costello ran into this problem (oddity) at the runoffs. He was having a rear brake issue and in a short stint found the rears were double the temp of the fronts. They borrowed our car and ran the exorcise and found the same result. Got me why but it appears to be normal.

 

i'm glad that i'm not the only who notice it. i thought my brake bias might have been off. not sure if this could have attribute to Cale's rear brake failure
RIP Cale.

 

"seems" get an IR thermometer and measure those bad boys. I measure mine after every track session and I come in w/ fronts and rears ~450+-15F after a cooldown lap.

If you are using OEM pads and overheating them, then the rears could be hotter... I melted my OEM pads at the track my first time out and I actually killed my rears before my fronts because they do get a little hotter first.

My setup is 100% stock and the bias is even (ABS engages on all wheels at the same time).

 

My rear brakes last only half as long as the fronts. Heat is the issue. The rear brake heat problem has led to me having to replace the wheel bearings and hubs as well.

 

It does seem that it might be more important to provide "cooling" for the rear brakes than the front brakes.

 

I go through front brakes twice as fast as rears at the track, FWIW.

 

I had my rear left rotor dissappear on me at VIR last August at the end of a race, at the end of the front straight. I ended up running into a BMW which slowed me down going off track.

I had always assumed the rotor just broke upon impact and that is why it wasn't there when my car made it back to the Pits. I thought that I ****ed up and didn't brake in time for the turn until what recently surfaced with Cale.

It sounds like Cale had a very similar situation but with the misfortune of having nothing to slow him down.

At the time, my rear rotors had 44k street miles plus maybe 6-8 track days. I do not know about Cales. I had never given it any thought to replace rear rotors in any of my tracking.

i guess we should all plan to put NEW rotors on the rears at least every year.

I did not take any pics of the rotor area due to my usual lack for details.

 

I have been making a habit out of matching pads and rotors together. For every new set of pads I have been putting on a new set of rotors. This means new rear rotors every 7-8 days.