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mojo1 04-17-2017 04:16 PM

E84 brake upgrade availability?
I'm interested in upgrading my brakes. Can someone recommend an upgrade that fits 2014 X1 2.8 sDrive? Thanks.

Der_Kommissar 04-18-2017 07:18 AM

Over on bimmerpost there is a thread about someone who upgraded their x28i brakes to the x35i ones. Check that out.

tripman630 05-11-2017 09:57 AM

Look into R1 Concepts brakes/rotors
I just purchased a set of slotted rotors to replace my pitting OEM ones.
I also have an sdrive X1
Should be here Friday.

I picked up a set of (4) vented, slotted rotors and 8 ceramic pads for like $250

Bucketfoot 05-11-2017 06:02 PM

I may have to look into what brake upgrade options are available.

I took my X1 out on the track a couple of weeks ago and had to end a session early (to be fair it was a double session) due to my front brakes overheating and chattering really bad. This was pretty disappointing, especially given that my brother-in-law had no issues running a fricking rental Impala.

0w40X1 05-11-2017 06:50 PM

I suspect the good track near you is HPR east of Denver?

I drove my s28i there twice, and didn't have any braking trouble after 20 minutes runs.

I was driving it as hard down the straights as possible, and hit a little over 90 mph on the front straight down to 30-40 for first corner.

What I've noticed when I ran with traction off is the traction seems numb, and left rear spins wildly even when coming out of corner with weight on drivers left side.

So I enjoy the traction control and rear brakes are wearing faster than front.

Your x28i has all that brake vectoring claim, so it might be running more than necessary and heating brakes.

I'm not having any fade ever.

I think I'll put rear pads on and see how it works with fronts until they need it.

Bucketfoot 05-12-2017 07:24 AM

Yep, HPR. My buddy is the Regional Director of NASA Rocky Mountain, so this was the second NASA event I've run there.

I didn't have any issues the first time but that was with 20 minute sessions. This time we had really low turnout due to snow and a late start, so we ended up having a 45 minute session where all the HPDE groups ran together. I started feeling the brakes chatter lightly at about 35 minutes and had pulled of the track by 40 minutes in. Ultimately I have no doubt that the main factor was running a much longer session.

I can usually hit 105-110 mph down the main straight, but with the track being a little wet I was closer to 95-100 mph. I think turn 4 at the end of the straight was probably the main culprit. The wet track probably added to the brake issues as well, as I was definitely braking harder before the corners more than I would in dry conditions.

My first time out I turned DSC off, but this time again due to the wet track, I left all the nanny controls on. I don't know if that may have contributed as well.

iamthewalrus 05-12-2017 08:29 AM

I didn't realize the 35xi came with different brakes than the 28xi. I bought the 35xi for the traditional shift lever and the extra power, and this is a pleasant surprise!
I'm definitely not a fan of the runflat tires; there is something about them that just doesn't instill the same level of confidence in handling. But that's been covered elsewhere...

Seattle, WA
2014 BMW X1 xDrive35i Sport Line, loaded
2006 BMW X3 3.0i manual, m-sport, loaded
2006 BMW 330Cic manual, sports package with everything but nav
2006 Mini CooperS convertible, manual, sports package, everything but nav
1998 Audi A4 2.8Quattro Tiptronic, loaded

0w40X1 05-12-2017 10:42 AM

My s28i hit 110 corrected not speedo the first time. Then, I put 12mm spacers on front only, and got 112 down the main back straight, since car can get higher speed out of last corner.

With DSC off car feels numb, so I never run that way.

I have 225/45r18 and 255/40r128 Pirelli P7 summer tires, and they seem really good.

I could see where the DSC going off all the time could keep brakes warm on slick pavement.

On dry day it's full brake, and then, no brake for say 15 seconds or more. Time to cool off.

0w40X1 05-12-2017 10:55 AM

I took my RX8 Mazda to several tracks until I got my wifes X1, since X1 s28i is faster, and you can feel torque out of corner.

I noticed that the rear brakes on both cars wear out faster since the DSC is turning on occasionally.

I'd not run either car without since DSC doesn';t come on if you ran the corner right.

Wildly hanging out rear end is not fastest way around.

I've heard some grinding growl of X1 brakes from time to time, mentioned it, and BMW on warranty shaved some pad off.

I didn't need that much help, but I don't like the instant grab of brakes anyway.

I'm going to put Posiquiet Centric or other long wearing Ceramic pad on next time.

The metalic brake pads are really hard on rotors and wear them also.

I don't need that much brake since even HPDE isn't race only me against my car.

I just wanna know it's limit.

wunderkind 05-12-2017 02:22 PM


Originally Posted by iamthewalrus (Post 10155293)
I didn't realize the 35xi came with different brakes than the 28xi. I bought the 35xi for the traditional shift lever and the extra power, and this is a pleasant surprise!

That' because a 35i is a few hundred pounds heavier. So it needs bigger brakes to stop. Bigger brakes = more unsprung weight. That usually affects handling negatively.

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