Hi guys,
Sorry for the late reply, here is what I have to share(take these as comments and info, NOT data):
1. What materials you need: i) BMW Performance Calipers ii) BMW Performance rotors (dia and thickness are smaller) exact dimensions you guys already know iii) Custom bracket (Frits can supply them)
2. Installation process: *Disclaimer: These are not installation instructions! Only gives a vague idea on what was done. Sorry for lack of clarity. Frits can fill in the details if he has the time.
i) Remove stock rotors/calipers and bolts *DUHH * (I will take a photo of items that were removed)
ii) Cut off a bit of the guard plate (right term to use??)
iii) Some grinding was done on the custom brackets (no picture)
iv) Bolt on BMW Performance BBK
That's it!
3. Field Report:
i) For the first hundred stabs at the brake pedal or so, you will feel as though the brake lines are filled with mostly air and marshmallows, almost no bite for the first 50% of pedal travel. But this is normal, consistent with Frits' experience as well. It will progressively get back to normal. I did heavy braking about 10 times from ~100kmh. This seemed to speed up the back-to-normality process. Guys with anoraks, maybe you could explain why this is so. :tonquesmilie:
ii) Performance:
Bite: Don't expect massive improvement in initial bite compared to stock. This, to me , is a good thing. Don't really want to feel like I've run into a wall when I brake lightly.
Pedal feel and modulation: Very progressive and controllable. Expectedly, difference to stock feel is most noticeable during heavy braking at higher speeds (at the track).
Braking performance and stopping power:
I think most people are turned off by the smaller rotors(than stock) of this brake kit but IMHO improved braking performance is achieved by hastening the conversion of kinetic energy to heat(pad sweep area biggest factor) and improving heat dissipation rate(rotor size, material properties, geometric design). Rotor size is, of course, a big factor. With this kit, rotors are slightly smaller but pad sweep area is vastly increased via those huge calipers. The rotors seem to handle the heat dissipation just fine. Of course, I do not have any measurements to substantiate this.
Was at the 'Ring last weekend with this BBK. No signs of brake fade (max consecutive laps was 2) at all. Overall, gave me MUCH more braking power than stock and they felt predictable. That made me feel confident. Perhaps Tiago and I could do some side-by-side brake tests for comparison
though he's got better tyres than I do
For me, it was between the Stoptechs and this.
I am quite sure this brake kit won't give you as much stopping power as the stoptechs, but you do save 900 Euros :tonquesmilie: and in my case, 6 weeks of delivery time (I need to go the track NOW!)
Are these 900 Euros worse than the stoptechs? I really can't see that being the case. Great value for money, then.
Ideal for that balanced comfort+casual track driver I was looking for.
Never regretted getting 'em!
P.S Will take and post more pictures soon