I have seen JCW GP BBK being sold recently at minigenuineparts - The 6 pot brakes with 330mm rotors.

I use the NM 17" rims and based on the offset and checking with Martin from minigenuineparts it should fit but also depending on the how the spokes of the rims are curved.

Here is a pic of my rim with JCW BBK,


So unless he has a set of the rims to check (which he doesn't) i have no way of telling if it fits. And with the price its kinda expensive to take the risk.

So here I am asking if anyone in this forum can add anything to help me decide.

While we are on this topic on brakes. I have the JCW BBK with front rotors of size 294mm. If these calipers are the same used in the fJCW, why are their rotors size larger at 316mm? My mini is a MSC.

Thanks in advance for any advise given.

 

They are running such huge rotors to increase rotor mass, which is one of the best things to do to increase cooling. Being that the GP MKII is the most aggressive MINI to date that's practically ready for track driving, it makes sense why they chose to do this. The 6-piston calipers are completely overkill for the MINIs weight, but it definitely looks cool. If you are running purely street there is no point to big brakes besides looks.

I bet you're going to pay out the 8ss for that kit since it is JCW branded. If I were in the market for another set of big brakes I would buy a kit from Wilwood. However, I am perfectly happy with my Detroit Tuned big brake kit. You can get so much more for the price and not deal with marked up German parts.

If you decide to get a Wilwood kit, the nice part is that there are a lot of rotor options. It makes more sense to increase the thickness and number of vanes in the rotor instead of making the diameter so damn huge. That way you can run smaller diameter wheels with no issues. 330mm (~13in) is just too big on the MINI. You're practically stuck with an 18" wheel. When I see 18" wheels I can only think of the excess weight. Yuck.

 

I run Stoptech's big brake kit and though I considered the GP2 bbk for a bit, I knew it was just not worth it because honestly, the Stoptech's are easily interchangeable with so many rotor and pad options that there isn't competition besides Brembo for everything you can imagine for track or daily use.

The Performance pads I use on the track which come with the Stoptechs are amazing on the track and on street, and they don't squeal everywhere you go. Look elsewhere because when you need to replace the rotors or pads on those 6 pistons, you'll regret it. Performance pads were $55 for the front set, just for reference :D

 

Don't mistake piston qty for brake force guys. The reason for the three pistons per side is to improve pad pressure points for longer wear. As the pads grow larger it simply doesn't make sense to put two massive pistons behind it so manufactures spread the load by way of differential bore designs including 2,3,4 and more piston each.

The brake force does not necessarily go up just because there are more; making it irrelevant to say that one doesn't need such things. What you're looking at is area, not the quantity. As the piston qty goes up the piston sizes go down. Rather than 2 x 1.375 bore per pad you'd have 1 x 1.375, 2 x 1.00. Both netting nearly identical area or force.

For track day users, unless you plan on specific use smaller wheels and tires I'd take the larger rotors over the smaller ones any day. As the rotor goes up in size (granted to a limit here, despite selling 14s I full well know that those are more show than go) you gain not only the increase in rotor mass but also a huge gain in efficiency. Swept area goes up which simply means the larger rotor is doing the same work at a lower duty cycle. The balance here is to then pair it with the proper caliper so not to over bias the car which can be easy to do.

I think most track day users are best served in the 13" market and most enthusiast users are better served in the 12" range. Call it a hunch but I speak for my market of nearly ten years also. The down side of many 13" kits is caliper body size; you don't have a lot of options for calipers that fit the larger rings and thus will often lead to wheel fit issues.

 

Reading your opening post(how the rim curves), my question would be, are you against the use of spacers? If the rim doesn't curve outward as much(and thus hits the caliper), just throw on some spacers? I doubt you'd need much. Unless of course, you're so lowered that tossing spacers would cause rubbing issues.

 

Dude you if you are dead set on buying these save yourself some money as they also put these calipers on the BMW 1 series.

 

Thank you all for your comments. Help me decide. Which is not to get it yet.

As it seems finding replacements for 330mm rotor is quite hard and I would have to import them to Singapore. I would have to get them from the same supplier as the calipers.

Plus the weight of the rotors make the shipment charges very expensive. Almost half the price of the rotor itself.

Also still not sure if it can fit my rims. Martin did mention some spaces will help.

 

That is something you are going to have to figure out. They might fit under some Challenge Spokes but, there isn't very many stock wheels that will fit under. For the money you are talking about you can either get a Wilwood, Stop tech, the Detroit tuned, or normal JCW brakes for a lot less.

 

Double post

 

Andywong33

Since you're in Singapore you may want to try to contact WPpro. http://wpprobrakes.com/main/image/126 They make great kits and are closer to you.
You can order a kit in almost any color.

Also, your Neuspeed rims (if 17') should work fine with any kit made for 17" and under. The GP rims are 17j x 7.5, same as your Neuspeed/nm wheels. offset is about the same.
I'm not 100% sure on offset, but they're close.

 

I am with Todd (tce) on this. Get something smaller like his plus 2 tce kit unless you track the car. I have his plus 3 13" forged super light (FSL) with the thicker width rotors and would recommend it for the track. I have smoked them before in watkins when i was too aggressive with the brakes. Those pads are really think as well.

If you are looking at fitment, look at tce to see how to measure fit. I used his measurements and it works.

I know there are no tracks in Singapore. Do you go up to sepang? Is that why you want the really large bbks.

 

Personally, I ike the Wilwoods. 12.19" in the front and 11.75" in the rear.

 

Are your rotors on backwards? Or does it not really matter?

 

The vane direction does matter. Maybe his slots point in different directions than the vanes do?