24 replies to this topic

[techieboy]

Techie which compound did you get I have got the 1793 formulation not the 1846 formulation and have found them good FOR ROAD USE.

Hmmm. Not sure. He said they were the "latest" revised compound, so possibly 1846's? They just came in bubble wrap style bags and not boxed so can't check until I remove them from the car. They probably are okay for road use, although I wasn't entirely convinced with their performance during the bedding-in runs I did prior to the trackday.

There's a couple of corners on the GT circuit at Bedford where you really need to brake heavily from 120mph+ and by lap 3 they'd feel a bit "off" and would be worse still with each lap. Got to the point where I didn't want to be too near a car in front, braking for the hairpin at the end of the second half of the main straight as I couldn't be confident that they would scrub enough speed off and at that particular corner, there aren't many places to go if it does go pear shaped.

At one point all four discs had "blued" as well, although the rears had cleared up by the time I got home and the fronts are nowhere near as bad as they had been. Not sure if that's related but never experienced that with the RS4-2's or ever felt that they weren't man enough for the job. Granted, I've been supercharged since the last time I did Bedford but haven't had any previous brake fade at other trackdays (well apart from the Don Palmer day I did with the Green Stuff's that originally came on the car).

yellow's are fine with road tires, but I doubt they are good enough to work well with 888/A048

but a decent road/trackday pad for classic tires

I think you may be right there.

[mandarinvx]

Wouldn't blued discs suggest the pads were doing too good a job (ie too much friction)

[Anarchy]

I can confirm Red stuff are shite, my car came with them on. The f8ck£rs would not wear out so I dumped them in the end.

[siztenboots]

Wouldn't blued discs suggest the pads were doing too good a job (ie too much friction)

think it just means that the bad material that bedded down on to the disk, as gone and its now causing abrasive friction only thus more temperature going to the cast iron disk surface, whereas normally you would want ablative and abrasive friction. Ultimately the cast iron gets so hot it forms little cementite dots

anyway, the best explaination for referance I have read , really worth a read

http://www.stoptech....brakedisk.shtml

[mandarinvx]

Wouldn't blued discs suggest the pads were doing too good a job (ie too much friction)

think it just means that the bad material that bedded down on to the disk, as gone and its now causing abrasive friction only thus more temperature going to the cast iron disk surface, whereas normally you would want ablative and abrasive friction. Ultimately the cast iron gets so hot it forms little cementite dots

anyway, the best explaination for referance I have read , really worth a read

http://www.stoptech....brakedisk.shtml

A good read, cheers