S000M

Can anyone explain why my rear brake rotors get so much hotter than fronts when running roadcourse track with heavy breaking 100-mph down to 20 & 30 mph in some cases. Running "03 w/OEM style EBC rotors & Yellow Stuff Pads. Motul 600 RBF. Stock calipers w/new lines. No evidence of calipers dragging either. 16" OEM wheels w/Potenza R11A's. I would expect the fronts to be hotter. Temps right after run: 170-230 dgrees front. 400-500 degrees rears. Does the ABS system shed more braking to the rears automatically under heavy breaking? Is there any sort of bias control? I hope some of you guru's out there can help me sort this out.

BMX RACR

Fronts are vented and the rears are not.

S000M

That's too simple. No, or should I say yes, I suppose that would account for the difference. Plus they get better air flow than rears. Are there any simple airflow solutions for better cooling of the rears. My other problem is terrible scoring of the two front rotors. Brand new rotors & pads this week after bedding, and the front rotors look like the rings of planet Saturn x10. Second time this has happened. I'm wondering anyone else had similiar problem w/Yellow Stuff pads?

BMX RACR

I would think the aggressive pads are probably causing it.

slowd16

The real question here is why your fronts are only 170-230. The brakes being 400-500 after a session is normal and expected. Front being so low is not. A race pad doesn't even start gripping until 200* at a minimum.

BEASTMODE

It is normal for rear brakes to retain heat more being solid rotors. How are you checking temperatures?

S000M

yes you are right about that. The are ok and work fine on the street, but under repeated heavy braking they damage the rotors. Found out they are more for heavier and bigger vehicles. They have a new product "blue stuff" that's designed for lighter vehicle and longer rotor life with the same good stopping & initial bite as the yellows. I'm going to try a set on the front after I turn the rotors. thanks again for input.

cdelena

Early users of the S2000 on the track quickly found that rear brakes overheated... it was found that front brakes which should take most of the load lost effectiveness as the overheated. Surprisingly running cooling to the front rotors eliminated rear brake overheating.

I opened vents and ran cooling to the back of the front rotors and never had rear heating problems again.