Gimmick IMHO.

If Lower has severly tested the DBAs, i'd get them anyday over some poncey LN2 treated stuff.

 

Possibly

I put the spoon discs on, did about 3k road miles, then did rockingham and cracked a disc.

I put the DBA discs on, did a few 1000 road miles, did rockingham again. No cracking but for the first time ever boiled my brake fluid so used them harder than ever before.

I have either warped or cracked my discs at virtually every trackday i did on the S, until i put the DBA's on and i've subsequently done 14k road miles with virtually no wear on the discs.

 

The poncey stuff might be better? who knows?

 

Sounds like you had a close shave there man...

Boom Boom.

 

Speaking of warped discs; I'm fairly sure mine are warped from the Oulton excursion.

I tried cleaning them with hard braking as suggested by Dembo (or was it Chilled) but to no avail; and now notice a vibration (fairly minor at speed but its definately there).

They are now an embarrasment when pulling up in traffic as it must look like I'm slightly Kangarooing the car and can't drive it properly

So; what I want to know is; Is driving with the discs warped for any length of time detrimental to the braking system? I would have thought it was?

Reason I ask is that I'm wondering if I can live with this for a little longer before changing them or should I change them now and save any potential issues with damaging the calipers?

I'll likley bung on some DBA's as it sounds as though Lower has given them a true beating with the Ferodo's and they've stood up to it.

 

there is some merit to this method have a read of this or go to the web site

taken from this web page http://www.195below.co.uk/html/autosport.html
Low-call

Much has been written about the detail of what happens to materials when they are taken down towards

 

Interesting reading

 

However, none of those articles refer to what happens when you heat them back up again.

And also none of them mention what happens to the thermal conductivity of the metal.

 

Brake discs dont get hot enough to alter the grain structure in the metal
if i understand this correct all you are doing is making the structure more uniform with a small grain structure this helps prevent uneven expansion (warping) due to all the grain being the same size, similar results can be achieved by good casting and metelurgy and its probably this that makes a good disc better than a bad one, if this process takes it a step further it can only be a good thing

 

I don't think that matters really as like oxhouser said they will never get hot enough anyways.

I'd of thought the thermal conductivity would increase, i'm assuming that is good?