Hey

Felt my brakes crumble a bit under heavy braking (150km/h to 20km/h in like 200m-ish) after having to slow down after 1/4 drag races. Initially just wrote it off as the pads just heating up a bit but the next morning I noticed an interesting pattern on my rotors. Running stock well worn BB1 rotors with Ferodo stock replacement pads. Do I need to worry about the rotors going out or is this normal enough?



Thanks

 

If they've never been cut before they can be refinished on a lathe but if you drive on them like that you'll more than likely have a shake in the steering wheel when braking on the highway. You're too hard on the brakes, I bet you're just popping it into neutral and slamming on them.

 

I have never had any steering wheel shaking whilst braking, regardless of the force applied to the brakes. And no I did not slam on the brakes, it was a gradual application about the same as coming to a stop from high speed during daily driving and I used my gears to slow down..., if I did slam on them at 150km/h the car would most likely spin out. Also, no ABS so I need to be gradual on the brakes so my wheels don't lock up. Rotor's have done 240k km's and I suspect they may be too thin to regrind.

They are still working fine on normal daily driving and worked fine on the drag strip (apart from the overheating; the car slowed down just fine) but I don't want to continue using the rotors if they are unsafe/unable to dissipate the heat generated due to being too thin.

 

They can be cut if they are still within specs. But why bother? A new set is likely less that $50.

 

^ that makes my front rotors look young.haha. Guess I'll keep an eye on this set for cracks and the other eye on a new set of new rotors.

Anyone know of aftermarket rotors that weight the same or less than stock prelude rotors (~13.5lbs or less / rotor) that are decent?

 

Get them turned or replaced, then try the Duralast CMax pads and see if you can tell a difference

 

I like my brembo blanks. Im not sure how thin your rotors are getting but as you stated, you lose more and more material off the rotors you have less material to absorb the heat caused by the friction of the braking forces. The rotors acting effectively as a heat sink that diminish in performance due to less material to absorb the heat will be more prone to warpage, the thinner material being more susceptible to the heat. Also not sure of the compound those ferodo pads are made of. I believe the ceramic brake pads will help stand up to brake fade, I am particularly hard on my braking system and the brembo rotors and a pad with ceramic compound works well.

 

Rotors dont warp. They will never get hot enough to warp. (at least not in this application) That is a misconception. Also heat dissipation is not done by the rotors alone. In fact, the rotors do little to dissiapate heat, other than utilize vanes to keep cool.