Build Journal Megane RS BBK Kit available this morning.

[liam821]

Got it, thanks. 345mm it is then.

As an added bonus, they fit under almost all 18" wheels nicely.

[Bigo1087]

The Buildjournal description (at the top) lists the calipers as new. But if you scroll down, it says "TUV Certified reconditioned calipers"
I guess it depends on what is reconditioned, but in any case I would still consider it as a used item.

Thank you for pointing this out to me.

Ive been in email contact with them for an explanation.

And they did confirm they aren't brand new, and when i asked about the price difference on other vendors in UK that can ship more complete kits with new calipers for $750ish after conversion.

He explained the lines are custom by portfield, USD weak vs sterling pount, R&D costs, and obv USA material and labor costs are higher.

Which is all fine and dandy to me.. i get it (I'm a design engineer, and i work in manufacturing)

He did update the website, as "new" meant the kit was new, but he agree'd it was confusing.

But i wanted more details on the calipers, where they come from and why they can't source new calipers. OR if i can source my own new calipers.

I'm now torn between price i paid for this this kit i ordered vs freakyparts.

[r4dr]

R&D seems a bit farfetched when other people have already executed the concept, doesn't it? Hmm.

[Nick_P]

How do the CSL/ ZCP rotors take track duties, being drilled and not particularly thick vs aftermarket BBK options?

[S14]

Is brake bias affected by the larger rotor diameter? It's the same caliper (so same piston sizes) using the same pads, isn't it?

One upside to me is that Girodisc makes E9X M3 fronts.

Brake bias can change when any of these components are changed
- MC piston size
- pressure regulator (often used in BMW's to attenuate rear pressure)
- Caliper piston size
- pad size
- pad compound
- rotor size
- tire size
- tire compound

going from standard M3 discs to ZCP/CSL disc alone moves the bias forward by almost 2%, one reason why the CSL runs a larger rear piston; the other is that more rear bias is a good thing... until it's too much.

[liam821]

How do the CSL/ ZCP rotors take track duties, being drilled and not particularly thick vs aftermarket BBK options?

They don't last as long - the ZCP/CSL rotors are notoriously soft. However, with FCPeuro's lifetime warranty, it's not that much of a big deal.

[Nick_P]

Yes, good point about FCPeuro. That should bring costs down over time