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      01-31-2013, 03:02 PM   #1
JMK007
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Stock Brake System on F30 328i for Track Use?

Let's talk about the stock brake system for the F30 328i. How are they for track duty? I presume the stock pads are not sufficient for extended, hard use; nor is the stock brake fluid--but maybe I am wrong. How about the stock calipers and rotors? The calipers seem pretty small. If you have used only aftermarket pads, which ones and how did they hold up?

I think we should have a separate post on the same topic for the F30 335i. That would certainly be informative to people with those cars and people with the 328i who may consider upgrading to 335 brakes.
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      01-31-2013, 03:11 PM   #2
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I've read in places that the 335 brakes still have fade after a few laps. It will definitely be better on a 328 since the car is lighter however maybe the M-Pref brakes will be better. I believe South Africa's Team Afrox F30 uses the M-Pref brakes all last year.



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      02-01-2013, 10:08 AM   #3
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I have run a 99% stock brake setup a couple of times, including once on Hankook Z214 intermediate compound tires. FWIW I am an instructor and have run the car on a reasonably brake intensive track.

One modification I made to the stock setup may have helped - I cut the rear half off of the dust shields, and added some Porsche GT3 brake scoops to the lower control arms. It was a cheap and easy mod so even if it didn't really help (I didn't do before and after comparisons) I have no regrets.

The stock brakes were fine, although I admit to stretching my braking zones and not really hammering them. Still I had no fade and didn't boil the fluid. Likewise I experienced no fade at all during the two autocrosses in which I competed.

Sitting in my garage are some custom made and as yet unused CarboTech RP2 pads. We ran this compound on our LeMons car and I had them on my Evo. It is a great pad with high temperature ratings, good cold performance and excellent durability. I can't wait to try them out on my 328i.
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      02-01-2013, 10:51 AM   #4
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From prior experience on a Mark 6 GTI, removing the front dust shields (or modifying them as described) can make a HUGE difference in cooling. Did you preserve part of the shield to protect from over heating nearby components?
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      02-01-2013, 11:04 AM   #5
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im selling my stock 335i msport brakes. 1000 miles on them and never tracked. just an FYI
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      02-01-2013, 01:02 PM   #6
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Quote:
Originally Posted by JMK007 View Post
From prior experience on a Mark 6 GTI, removing the front dust shields (or modifying them as described) can make a HUGE difference in cooling. Did you preserve part of the shield to protect from over heating nearby components?
Funny I got the idea from tracking my MKV GTI! I did leave the front part of the shield because it has a scoop to draw air from the brake ducts built into the front bumper. My feeling was that the benefit of that scoop outweighed the risk of retaining heat there.

What I want to do is modify the OEM brake ducts to route air more directly and continuously to the back of the rotors. There is just so little clearance between the tire and fender liner that it is tough to engineer.
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      02-01-2013, 01:03 PM   #7
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im selling my stock 335i msport brakes. 1000 miles on them and never tracked. just an FYI
Please send me a PM with price.
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      02-01-2013, 02:30 PM   #8
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Please send me a PM with price.
Will do. But I have no idea of their value. I let you know ASAP. Where in Cali are you?
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      02-01-2013, 08:51 PM   #9
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Quote:
Originally Posted by mocohead View Post
Funny I got the idea from tracking my MKV GTI! I did leave the front part of the shield because it has a scoop to draw air from the brake ducts built into the front bumper. My feeling was that the benefit of that scoop outweighed the risk of retaining heat there.

What I want to do is modify the OEM brake ducts to route air more directly and continuously to the back of the rotors. There is just so little clearance between the tire and fender liner that it is tough to engineer.
That is funny. On the GTI, I had fade in 70 degree weather after 2 laps at Gingerman with the dust shields on running street tires. The next year, I removed them and had no fade in 95 degree weather running R comps and managed to set the track record in TTE.

Did you happen to take any photos showing how you cut the dust shields and how you attached the GT3 brake scoops?
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      02-04-2013, 09:33 AM   #10
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Quote:
Originally Posted by JMK007 View Post
That is funny. On the GTI, I had fade in 70 degree weather after 2 laps at Gingerman with the dust shields on running street tires. The next year, I removed them and had no fade in 95 degree weather running R comps and managed to set the track record in TTE.

Did you happen to take any photos showing how you cut the dust shields and how you attached the GT3 brake scoops?
Here is my DIY post

http://www.f30post.com/forums/showth...light=mocohead
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      01-14-2014, 03:16 PM   #11
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so do you guys have anything more to add on this topic since last year? i am looking ot maybe take my stock 328 msport out for a track day in a few months. it's not even broken in at 1200 miles yet, bu i think i'll be over 2300 by the time i get to the track.
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      01-15-2014, 11:27 AM   #12
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FWIW, I faded with m-perf pads, which I'm guessing is a similar compound. Mocohead is probably a better driver than I though. I also was hammering them pretty hard after the straights.
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      01-17-2014, 09:06 AM   #13
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ronin, do you have the $650 msport brakes or the $3000 ones?
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      01-17-2014, 12:56 PM   #14
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$3000...though I think it was $1500...don't want to remember. My understanding is the 2014 $600 option is the same though. At least according to JMK. I'm just a sucker who participated in their market research
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      01-17-2014, 03:20 PM   #15
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so just the upgraded blue calipers and different pads?
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      01-20-2014, 11:22 AM   #16
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it's not $3k.
I spent like $2300 installed.
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      01-22-2014, 12:37 PM   #17
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Quote:
Originally Posted by JMK007 View Post
Let's talk about the stock brake system for the F30 328i. How are they for track duty? I presume the stock pads are not sufficient for extended, hard use;
You are correct, they are not sufficient for extended, hard use.

I took a stock F30 328 xdrive to Toronto Motorsports Park and I got the high brake load warning after about 25 minutes of lapping

Ambient temp were 45F, there was no traffic since it was a 9 person private day and I was lengthening brake zones only as needed to accommodate the short comings of the stock parts

Obviously, you would be able to get by with the stock parts if you accepted that you need to baby the brakes but if you want to hammer down lap after lap some parts need to change
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      01-24-2014, 11:19 AM   #18
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so a pad swap and some new brake fluid would go a long way on an otherwise stock car?
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      01-26-2014, 11:43 PM   #19
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Quote:
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so a pad swap and some new brake fluid would go a long way on an otherwise stock car?
Yes, but GL finding aftermarket pads...unless I missed something. In any event, fading pads and overheated street tires are half the fun

You're not going to die or crash because of it, so don't worry about it and go have some fun!
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      01-27-2014, 10:04 AM   #20
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but i could swap to m-performance pads and hihg temp fluid from BMW right?
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      01-27-2014, 11:05 AM   #21
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but i could swap to m-performance pads and hihg temp fluid from BMW right?
No, mperf pads won't fit stock. Even those won't buy you a whole lot. I think they are all pretty much the same compound. i.e. Not metalic

Not sure about hi-temp fluid. This is the first I've heard of it. I usually just flush with ATE.
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