BMW Performance Brakes

[wmandra]

Originally Posted by MTHuynh23

my pics of the brakes are up...go here to view...http://e89.zpost.com/forums/showthread.php?t=941154

Car looks great!

From looking at the closeup pic, I don't think those brakes would work with an 18" wheel.

[Mr Wolf 581]

Hi guys, is there a way to know for sure if F30 perf brakes fit or not on 18" wheels?

[nicknaz]

Originally Posted by Mr Wolf 581

Hi guys, is there a way to know for sure if F30 perf brakes fit or not on 18" wheels?

I don't think so, because it is going to be a close fit and it will depend on the specific wheel being used. You'll have to install the brakes and test fit the wheel.

[CedarZ4]

Originally Posted by Mr Wolf 581

Hi guys, is there a way to know for sure if F30 perf brakes fit or not on 18" wheels?

The BMW F30 Performance Brakes fit all OEM BMW wheels, 18" and larger. (Aftermarket wheels will depend on style, as Nick mentioned)

Confirmed here: http://www.shopbmwusa.com/PRODUCT/38...E-BRAKE-SYSTEM

"The BMW M Performance sports brake system is only approved in combination with at least 18" aluminum wheels."

[CedarZ4]

Originally Posted by MTHuynh23

thx..i think im going to go with the new f30 4 pot setup

Curious as to why you went with the F30 4-piston as opposed to the BMW Performance 6 pot?

[MTHuynh23]

I liked the design more on the new F30 and also wanted a contrasting color .

[nicknaz]

Originally Posted by CedarZ4

Curious as to why you went with the F30 4-piston as opposed to the BMW Performance 6 pot?

wmandra mentioned the F30 set has a bigger rotor than the E9X set ("6pot")

[Gunzaro]

I would use the Brembo Big Brake Kit for the e89. It's very, very costly but it looks excellent and it's designed specifically for the e89. Brembo are very particular and customise each kit to the vehicle.

[Mr Wolf 581]

Originally Posted by CedarZ4

The BMW F30 Performance Brakes fit all OEM BMW wheels, 18" and larger. (Aftermarket wheels will depend on style, as Nick mentioned)

Thanks Cedar! I've the OEM M Sport 18" wheels installed so should be fine!

[CedarZ4]

Originally Posted by nicknaz

wmandra mentioned the F30 set has a bigger rotor than the E9X set ("6pot")

Must have missed this, but I had noticed that as well.

The F30 has a 370mm rotor compared to 338mm on the Performance one.

Someone more familiar with brakes… how does a bigger rotor compared to more pistons?

That is to say, if we talk about pure stopping power, would a larger rotor with less pistons (370mm, 4-pot) give you a shorter stopping distance or would a smaller rotor with more pistons (338mm, 6-pot) be superior? Additionally, to my understand, it's not just about the number of piston as well, as pistons from different brakes can have different working area/pad size, therefore affecting performance? Can anyone chime in on this.

[wmandra]

Originally Posted by CedarZ4

Must have missed this, but I had noticed that as well.

The F30 has a 370mm rotor compared to 338mm on the Performance one.

Someone more familiar with brakes… how does a bigger rotor compared to more pistons?

That is to say, if we talk about pure stopping power, would a larger rotor with less pistons (370mm, 4-pot) give you a shorter stopping distance or would a smaller rotor with more pistons (338mm, 6-pot) be superior? Additionally, to my understand, it's not just about the number of piston as well, as pistons from different brakes can have different working area/pad size, therefore affecting performance? Can anyone chime in on this.

I believe the actual stopping power is going to be the same with both, but don't have any direct proof of that.

[nicknaz]

Originally Posted by CedarZ4

Must have missed this, but I had noticed that as well.

The F30 has a 370mm rotor compared to 338mm on the Performance one.

Someone more familiar with brakes… how does a bigger rotor compared to more pistons?

That is to say, if we talk about pure stopping power, would a larger rotor with less pistons (370mm, 4-pot) give you a shorter stopping distance or would a smaller rotor with more pistons (338mm, 6-pot) be superior? Additionally, to my understand, it's not just about the number of piston as well, as pistons from different brakes can have different working area/pad size, therefore affecting performance? Can anyone chime in on this.

My simplistic understanding is that the larger rotor (as well as the design of the venting) influences the heat capacity and large = more heat capacity = less fade. I think this is the most noticeable thing.

For the "stopping power" the swept area of the brake pad (i.e. larger pad) is important.. I am not sure which setup as more "swept area". I am GUESSING. it is F30 because the caliper looks bigger. In reality though, I think the tire is the limiting factor, because if the tire can be locked up in the dry, there is sufficient "stopping power". So I think the two setups are equal in this area if they can lock up the tires in the tire.

The additional pistons supposedly gives "feel" and more uniform pressure which minimizes the heat build up from flexing of the bad. I don't think this matters in the real world.

Hope this helps... if I were shopping for brakes, I would get the largest rotor possible with a caliper that had the brake pad I wanted to run. My guess is that right now the E9X 6 pot setup might have more pad choices because of the 135, but the F30 caliper should be getting a lot more choice soon because of the stock 335 having the same caliper as the m performance brakes and m sport brake option.

Lastly, we can't forget the bling bling factor.. the color of the caliper and the appearance behind the wheels... That's the key reason for for this upgrade right ?!

[wmandra]

Originally Posted by nicknaz

My simplistic understanding is that the larger rotor (as well as the design of the venting) influences the heat capacity and large = more heat capacity = less fade. I think this is the most noticeable thing.

For the "stopping power" the swept area of the brake pad (i.e. larger pad) is important.. I am not sure which setup as more "swept area". I am GUESSING. it is F30 because the caliper looks bigger. In reality though, I think the tire is the limiting factor, because if the tire can be locked up in the dry, there is sufficient "stopping power". So I think the two setups are equal in this area if they can lock up the tires in the tire.

The additional pistons supposedly gives "feel" and more uniform pressure which minimizes the heat build up from flexing of the bad. I don't think this matters in the real world.

Hope this helps... if I were shopping for brakes, I would get the largest rotor possible with a caliper that had the brake pad I wanted to run. My guess is that right now the E9X 6 pot setup might have more pad choices because of the 135, but the F30 caliper should be getting a lot more choice soon because of the stock 335 having the same caliper as the m performance brakes and m sport brake option.

Lastly, we can't forget the bling bling factor.. the color of the caliper and the appearance behind the wheels... That's the key reason for for this upgrade right ?!

The pad on the 6-pot calipers are 163mm x 74mm. Would be good if someone with the F30 perfomance brakes could post the pad size.

[z4z4z4]

StopTech white papers, see link, present the physics of braking systems theory in a easy to follow manner.
http://www.stoptech.com/docs/media-c...raking-systems

[pavproch]

Well, I am considering F30 performance setup for my Z4 front axle , I am running 19", so expect no rim-size issues, but - will the swap have any effect on a wheel offset (ET)?

[Gunzaro]

How about the 8-piston PB Brake kit in 380mm. One forum member has this one on front AND rear??