Brake Rotor Life

[Willo]

What sort of life are people seeing out of their slotted brake rotors? In particular I'm interested in hearing from people with aftermarket 6 pots. My rotors went from being slotted to flat in 5 laps of the National circuit at Queensland Raceway.

[Duncan]

absolutely nothing like that mate.

were they new?

what brand rotors?

what brand pads?

do you know what temps they got to?

[Willo]

absolutely nothing like that mate.

were they new?

what brand rotors?

what brand pads?

do you know what temps they got to?

Yeah, details might help.

Not new but near new.

Grex rotors (which means probably Alcon)

Grex pads, not exactly sure of the compound but they make a lot of dust.

Can't tell you temps. I do know a few other people (mainly Evos) use Alcon brakes as well and don't have these issues.

[ferni]

Are you sure they are alcons? There is grex stuff that isn't alcon.

I'm using DBA5000 with stock Brembo rotors on my GTR... I've done about 6 track days and a year of daily driving on them, and still only showing minimal wear. Run DS3000 pads for the track. Have also done about a year of daily driving on them with DS2500 pads. My setup gets very hot on the track, estimating up around 700-800 deg C.

[Ronin 09]

do you mean stock brembo calipers, ferni?

[Marlin]

Geeeez! That's some hard-core wear. Without knowing exact brand and product numbers, it's a little hard to say, but it's fairly obvious there's a serious mis-match of pad and rotor hardness. ie, either the pad's too hard, or the rotor's an inferior softy.

As for your ongoing "soft" pedal issue, sure this amazing wear rate could have something to do with it, but have you also considered your rubber brake lines?

[Willo]

Geeeez! That's some hard-core wear. Without knowing exact brand and product numbers, it's a little hard to say, but it's fairly obvious there's a serious mis-match of pad and rotor hardness. ie, either the pad's too hard, or the rotor's an inferior softy.

As for your ongoing "soft" pedal issue, sure this amazing wear rate could have something to do with it, but have you also considered your rubber brake lines?

Brake lines are braided and have AP Racing fluid.

When I searched for the brake pad model number before putting them on the closest I came up with was the Grex street/circuit compound but this doesn't list any further details about temperature range, friction or hardness.

So it is possible to have a soft rotor? Either way, I wouldn't think a pad could chew through a rotor in 5 laps? Is there anything that can cause a rotor to go "off" (heat cycles, insufficient warm up, bedding etc.)?

[Eug]

ouch... no good nath.

[Beer Baron]

there is something seriously wrong if you went from new rotors to worn out in 5 laps. did you measure rotor thickness before you fitted them (you should have)? what was it? what is it at now?

even with seized calipers you would be hard pressed to go through a set of rotors in 5 laps.

[Willo]

there is something seriously wrong if you went from new rotors to worn out in 5 laps. did you measure rotor thickness before you fitted them (you should have)? what was it? what is it at now?

even with seized calipers you would be hard pressed to go through a set of rotors in 5 laps.

Before they had little to no wear. I haven't measured after but obviously they are down the depth of the slots.

[sav man]

I have DBA 5000 series, and I've had 5 club days at Symmonds Plains, 1 at Baskerville, and various road driving, and they have barly been worn. Using Pagit RS14 pads

[ferni]

do you mean stock brembo calipers, ferni?

Opps, yes Stock brembo calipers, not rotors sorry.

If i were you willo, i'd be trying a different set of rotors and pads... not that you have much choice... try to stay away from whatever it is you have now

[260DET]

National circuit is hard on brakes. I'd be thinking very high temps, getting them down and dumping the present pads.