Cracked front BMW Performance rotors :(

TimMc · 04-01-2012, 04:37 AM

I had the car in at BPS Cleveland on Friday getting my AR DPs fitted. While there BPS found that my BMW perf front discs were cracked, which indeed they were - rather badly across all the holes. I've been warned about this happening with any drilled discs & now I can vouch for it. I was toying with the idea of running at last Thursday's trackday at Qld Raceway but had a suspicion that there may have been brake issues. Glad I didn't now. User's beware.

At 23,000kms my OEM pads at the front were nearly 2/3s worn, with a slight tapering towards the leading edge. Backs are barely worn. I gave BPS my original, unused front solid discs to fit along with a set of OEM pads I had spare. I'm now interested to see how the solid discs work on track & if fading becomes an issue.

While I was at BPS I had a good look at Sherrin's 135i racecar. Interestingly it also runs the BMW Performance discs. BPS reckon that Sherrin's disc/pad setup barely lasts an hour on track. They claim to be dynoing ~265KW with that car. It runs a BPS tune only with apparently no bolt on mods bar better cooling.

Dackelone · 04-01-2012, 04:39 AM

BMW gives you a two year parts warranty on those Perf rotors. IF you had a dealer install them they would also pay for the labor as well.

TimMc · 04-01-2012, 04:46 AM

Dealer installed them for me, three & a half years ago

I suspect they wouldn't warrant them for track use though.

Dackelone · 04-01-2012, 04:52 AM

Quote:

Originally Posted by TimMc

Dealer installed them for me, three & a half years ago

I suspect they wouldn't warrant them for track use though.

3.5 years ago! Man... then what are you complaining about! You should be changing your rotors out every few track events!! IF I were you I would also be inspecting your brake caliper pistons for cracks and replace your wheel bolts(bc they to have known to crack too).

When you do track events there is stuff you just gotta change out before it fails on the track.

TimMc · 04-01-2012, 05:07 AM

Quote:

Originally Posted by Dackelone

3.5 years ago! Man... then what are you complaining about! You should be changing your rotors out every few track events!! IF I were you I would also be inspecting your brake caliper pistons for cracks and replace your wheel bolts(bc they to have known to crack too).

When you do track events there is stuff you just gotta change out before it fails on the track.

Complaining's what I do best.
I expected the rotors to last longer than the (original) pads & wear out rather than fail. Car's only done ~5 track-days & a total of 23,000km. Pistons all look ok & one wheel bolt has been replaced. I'm thinking of replacing the bolts with studs & nuts.

Dackelone · 04-01-2012, 05:16 AM

Quote:

Originally Posted by TimMc

Complaining's what I do best.
I expected the rotors to last longer than the (original) pads. Car's only done ~5 track-days. Pistons all look ok & one wheel bolt has been replaced. I'm thinking of replacing the bolts with studs & nuts.

Yes, Ok.

Member DriveHard reported that a few of his wheel bolt heads had cracked off at a HPDE. He recommended to replace ALL wheel bolts yearly IF your gonna do track events. I think that is a good idea.

You also need to be changing your brake fluid and other fluids(oil, trans, diff) out regularly - as you probably know.

For your replacement rotors you might look into cryogenic treated brake rotors. They freeze them to make the iron molecules tighter and the brake rotors will last longer.

TimMc · 04-02-2012, 12:54 AM

I haven't heard of "cryogenic treated" brake rotors. Will google this. Maybe I'll just put mine in the fridge for a while... I will be looking for an effective replacement that isn't too expensive though. I wonder if EBC do an E82 version of their dimpled & slotted discs. These were fantastic on my E30. Dimples are supposed to be safer than drilled holes.

Yeah, my fluids are changed pretty regularly. I think I've had six oil changes in 23,000kms. Diff & gearbox fluids were changed last year & I may do another power-flush of the brake fluid shortly.

RaihaX · 04-02-2012, 12:58 AM

Let us know if you find something - I need to replace my rotors soon.

tracer bullet · 04-02-2012, 01:47 PM

I can't say any of Dackel's points are wrong, but I would agree that I'd have expected those rotors to hold up longer.

Dackelone · 04-02-2012, 02:00 PM

Quote:

Originally Posted by tracer bullet

I can't say any of Dackel's points are wrong, but I would agree that I'd have expected those rotors to hold up longer.

Not when you track your car. That puts an awfull strain on your brakes. You can toast your brakes in just one track session. I think after three or four track events new rotors would be a good idea.

I have put about 20K kms on my Performance rotors and they look fine. And I have an nice autobahn in my backyard to go out and play on.

I will tell you that your pad life is about half with these rotors - but I think that is to be expected.

Eddie135 · 04-02-2012, 05:49 PM

I agreed with Dack. Most of the rotors out there will not withstand track days, it is more for daily or aggressively driving.

sparoz · 04-02-2012, 06:02 PM

Tim, time to get a set of Mov'it Cer Gen 3. It will last you a life time.

TimMc · 04-02-2012, 10:08 PM

Quote:

Originally Posted by sparoz

Tim, time to get a set of Mov'it Cer Gen 3. It will last you a life time.

Look good Steve. Wonder what that set up would cost. I suspect I'd be paying them off for a lifetime...

http://www.movitbrakes.com.au/pdf/MO...Systems_hr.pdf

RaihaX · 04-02-2012, 10:12 PM

It seems like it will cost a million bucks!

TimMc · 04-02-2012, 10:12 PM

Quote:

Originally Posted by tracer bullet

I can't say any of Dackel's points are wrong, but I would agree that I'd have expected those rotors to hold up longer.

Yeah, like I said above I expected them to wear out before they failed. At least they didn't shatter...

sparoz · 04-02-2012, 10:50 PM

Quote:

Originally Posted by TimMc

Quote:

Originally Posted by sparoz

Tim, time to get a set of Mov'it Cer Gen 3. It will last you a life time.

Look good Steve. Wonder what that set up would cost. I suspect I'd be paying them off for a lifetime...

http://www.movitbrakes.com.au/pdf/MO...Systems_hr.pdf

Last time I got a quote was about 9k euro per set of 2 iirc. It was still gen 1 then.

RaihaX · 04-02-2012, 10:54 PM

holy you can buy a car with that

TimMc · 04-02-2012, 11:53 PM

Group buy...

woosh · 04-03-2012, 12:11 AM

Is there nothing by DBA?

pavo335 · 04-03-2012, 12:35 AM

pete from advan is pushing nashin brakes, i've never heard of them but he has a sample in the office and it looks pretty good imho

RaihaX · 04-03-2012, 12:39 AM

Hmm cannot browse through their chinese site

pavo335 · 04-03-2012, 01:23 AM

Quote:

Originally Posted by RaihaX

Hmm cannot browse through their chinese site

Iirc there is an engrish site as well

04-01-2012, 04:37 AM	#1
TimMc Lieutenant Colonel 44 Rep 1,883 Posts Drives: E90 M3 Join Date: Aug 2008 Location: Brisbane, Australia iTrader: (0)	Cracked front BMW Performance rotors :( I had the car in at BPS Cleveland on Friday getting my AR DPs fitted. While there BPS found that my BMW perf front discs were cracked, which indeed they were - rather badly across all the holes. I've been warned about this happening with any drilled discs & now I can vouch for it. I was toying with the idea of running at last Thursday's trackday at Qld Raceway but had a suspicion that there may have been brake issues. Glad I didn't now. User's beware. At 23,000kms my OEM pads at the front were nearly 2/3s worn, with a slight tapering towards the leading edge. Backs are barely worn. I gave BPS my original, unused front solid discs to fit along with a set of OEM pads I had spare. I'm now interested to see how the solid discs work on track & if fading becomes an issue. While I was at BPS I had a good look at Sherrin's 135i racecar. Interestingly it also runs the BMW Performance discs. BPS reckon that Sherrin's disc/pad setup barely lasts an hour on track. They claim to be dynoing ~265KW with that car. It runs a BPS tune only with apparently no bolt on mods bar better cooling. __________________ Driving - Manual E90 M3 (Melbourne Red/Black). Riding - BMW R1200RS Sport.
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04-01-2012, 04:39 AM	#2
Dackelone European Editor 10532 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	BMW gives you a two year parts warranty on those Perf rotors. IF you had a dealer install them they would also pay for the labor as well.
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04-01-2012, 04:46 AM	#3
TimMc Lieutenant Colonel 44 Rep 1,883 Posts Drives: E90 M3 Join Date: Aug 2008 Location: Brisbane, Australia iTrader: (0)	Dealer installed them for me, three & a half years ago I suspect they wouldn't warrant them for track use though. __________________ Driving - Manual E90 M3 (Melbourne Red/Black). Riding - BMW R1200RS Sport.
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04-02-2012, 12:54 AM	#7
TimMc Lieutenant Colonel 44 Rep 1,883 Posts Drives: E90 M3 Join Date: Aug 2008 Location: Brisbane, Australia iTrader: (0)	I haven't heard of "cryogenic treated" brake rotors. Will google this. Maybe I'll just put mine in the fridge for a while... I will be looking for an effective replacement that isn't too expensive though. I wonder if EBC do an E82 version of their dimpled & slotted discs. These were fantastic on my E30. Dimples are supposed to be safer than drilled holes. Yeah, my fluids are changed pretty regularly. I think I've had six oil changes in 23,000kms. Diff & gearbox fluids were changed last year & I may do another power-flush of the brake fluid shortly. __________________ Driving - Manual E90 M3 (Melbourne Red/Black). Riding - BMW R1200RS Sport.
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04-02-2012, 12:58 AM	#8
RaihaX Major General 156 Rep 4,995 Posts Drives: 08' 135i Join Date: Aug 2008 Location: Australia, Perth iTrader: (2)	Let us know if you find something - I need to replace my rotors soon.
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04-02-2012, 01:47 PM	#9
tracer bullet Brigadier General 2409 Rep 3,543 Posts Drives: '11 135i , '15 X3 35i Join Date: May 2011 Location: Saint Paul, MN iTrader: (1)	I can't say any of Dackel's points are wrong, but I would agree that I'd have expected those rotors to hold up longer.
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04-02-2012, 05:49 PM	#11
Eddie135 N55 Commando 55 Rep 797 Posts Drives: 135i - DCT - N55 Join Date: Jul 2011 Location: Melbourne iTrader: (0)	I agreed with Dack. Most of the rotors out there will not withstand track days, it is more for daily or aggressively driving.
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04-02-2012, 06:02 PM	#12
sparoz Brigadier General 191 Rep 4,848 Posts Drives: VO 1///M; Macan Turbo Join Date: Jun 2008 Location: Sunshine Coast iTrader: (0)	Tim, time to get a set of Mov'it Cer Gen 3. It will last you a life time. __________________ Macan S Diesel - Carrera White Macan Turbo - White 1///M - Valencia Orange
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04-02-2012, 10:12 PM	#14
RaihaX Major General 156 Rep 4,995 Posts Drives: 08' 135i Join Date: Aug 2008 Location: Australia, Perth iTrader: (2)	It seems like it will cost a million bucks!
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04-02-2012, 10:54 PM	#17
RaihaX Major General 156 Rep 4,995 Posts Drives: 08' 135i Join Date: Aug 2008 Location: Australia, Perth iTrader: (2)	holy you can buy a car with that
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04-02-2012, 11:53 PM	#18
TimMc Lieutenant Colonel 44 Rep 1,883 Posts Drives: E90 M3 Join Date: Aug 2008 Location: Brisbane, Australia iTrader: (0)	Group buy...
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04-03-2012, 12:11 AM	#19
woosh Colonel 212 Rep 2,938 Posts Drives: rs Join Date: Dec 2007 Location: bne iTrader: (0)	Is there nothing by DBA?
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04-03-2012, 12:35 AM	#20
pavo335 Banned 69 Rep 2,934 Posts Drives: 3.5 wheeler Join Date: Feb 2012 Location: sydney iTrader: (0)	pete from advan is pushing nashin brakes, i've never heard of them but he has a sample in the office and it looks pretty good imho
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04-03-2012, 12:39 AM	#21
RaihaX Major General 156 Rep 4,995 Posts Drives: 08' 135i Join Date: Aug 2008 Location: Australia, Perth iTrader: (2)	Hmm cannot browse through their chinese site
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