[MINI-Morgan]

Told you they were good especially being stock size

[NeuroBeaker]

They're awesome. And stock size is important because I'm sticking with the nice light OEM 15-inch alloys.

[beej]

Quote: Originally Posted by NeuroBeaker (original)

So far I've got on the list:

• Clean the sliders that the pads move across/sit in.
• Copper slip/grease on the pad face (the part that touches the disc or the part that touches the calliper?)
• Clean and file the hub mating surface with the disc to ensure the disc rotates true to the calliper.

hi Neurobeaker and the rest,

I'm also a user of these discs, bought and fitted by GTT. They started off silent but have become more squeaky over time, only at low speeds.

While in at my local ATS having wheel tracking checked, I asked about the brakes. They said what was most likely was the first two things in Neuro's list: not clean (or not cleaned adequately during installation?) or pads that lack a copper slip (where they are held by the caliper, presumably).

As per Neuro, some controlled hard breaking tests warmed them up nicely, but haven't changed anything

So unless anyone has a better idea, I'm intending to go to my local ATS for them to fix the problem - which might involve them refitting the spiroslot brakes that GTT originally fitted.


beej

[NeuroBeaker]

At the risk of reiterating my earlier post...

All the problems I had stemmed from the very first installation of them (independent mechanic in Glasgow) - the mating surfaces on the hub weren't cleaned, the sliders weren't oiled, and insufficient quantities of copper slip were used. I found the dramatic weaving from side-to-side under heavy braking was down to the mating surfaces. Brake noise when not actually applying the brakes was due to unoiled sliders and insufficient copper slip on the back of the pads.

On re-installation (tuner based in Glasgow) all this was done and it dramatically improved things - however, I still wasn't altogether confident... I was experiencing what I thought at first was brake fade, but in retrospect I think I was boiling the standard brake fluid.

When I finally was able to take the car to GTT I had the brake fluid changed and the Spiroslot installation checked. Brake feel was much more solid with the uprated brake fluid (that doesn't boil on the limit) and I've been much happier with the brakes since. There's still a little bit squirm under maximum braking - but I had a bit of a driving lesson from Roland to sort that one out. It's the first high performance brake kit I've ever purchased, so didn't really know what to expect or how to properly drive a rapidly decelerating car.

I've found that having put a few hundred additional miles on them, they've also quietened down a bit - although they're not entirely silent at <10mph speeds when cold. When hot: I can't hear them at all when the windows are up, and you have to listen quite carefully with the windows down to pick it up <10mph.

I've just taken these minor chirps as a characteristic of Kevlar pads and the phenomenal stopping power of the Spiroslots more than makes up for it. If I had to do it all again, I'd still get the Spiroslots, but I'd have them installed by GTT in the first instance.

All the best,
Andrew.