BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Track / Autocross / Dragstrip / Driving Techniques
 
Post Reply
 
Thread Tools Search this Thread
      05-06-2013, 12:34 AM   #1
dcs2k
Lieutenant
15

 
Drives: E92 M3
Join Date: Aug 2009
Location: Singapore


Posts: 440
iTrader: (0)

Rotors to last another track day?

I have a track day coming up this weekend. The brembo replacement rotors I ordered may not reach me in time for the event. Will the current state of rotors hold up for one more track session? M3 running on brembo gt 380mm and semi slicks with racing pads.



]
Appreciate 0
      05-06-2013, 12:48 AM   #2
swamp2
Lieutenant General
United_States
213

 
swamp2's Avatar
 
Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA


Posts: 10,201
iTrader: (1)

I can't say I have much direct experience on this but my gut tells me NO WAY. Way too many cracks, even if surface cracks. Brakes are the most important safety item on a car. Don't risk it especially on the track.
Appreciate 0
      05-06-2013, 12:51 AM   #3
krnnerdboy
Colonel
United_States
30

 
krnnerdboy's Avatar
 
Drives: v10 m6
Join Date: Nov 2008
Location: so cal


Posts: 2,095
iTrader: (10)

The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.
__________________

F80 m3, 997 gt3, 14 ram ctd, f15 x5, drz400sm

Gone:z4m, boss 302, c6 z06, m6,z3m
Appreciate 0
      05-06-2013, 01:34 AM   #4
TheKosherStogie
Lieutenant Colonel
United_States
45

 
TheKosherStogie's Avatar
 
Drives: 08 M3 DCT AW/Red
Join Date: May 2009
Location: West Hollywood


Posts: 1,616
iTrader: (1)

I don't know what's actually correct but I know people who run with worse
Appreciate 0
      05-06-2013, 05:12 AM   #5
rcracin
Private
0

 
Drives: toyota
Join Date: Jul 2012
Location: fj62


Posts: 82
iTrader: (0)

I wouldn't bother. First, you may not pass tech inspection. If you do, it might crack during the first session, then the rest of your day is wasted. If you're not trailering your car, you'll have to find a way to get home.
Appreciate 0
      05-06-2013, 05:33 AM   #6
CanAutM3
Brigadier General
Canada
54

 
CanAutM3's Avatar
 
Drives: 2015 M4 DCT
Join Date: Jan 2012
Location: Montreal


Posts: 4,187
iTrader: (0)

Garage List
2015 BMW M4  [4.75]
2006 Audi S4  [0.00]
Quote:
Originally Posted by krnnerdboy View Post
The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.
+1

I have run with worse without issue. The rule of thumb I use is as long as the cracks do not connect two holes together, I am good to go. The worst type of cracks are the ones that spread to the outer edge of the disk. If you see one of those, better end your day.
Appreciate 0
      05-06-2013, 06:24 AM   #7
w00tw00t
Lieutenant Colonel
United_States
33

 
w00tw00t's Avatar
 
Drives: a fun car..
Join Date: Oct 2010
Location: Issaquah, WA


Posts: 1,651
iTrader: (11)

I've also run with similar cracks on my GTR and had no problems...
Appreciate 0
      05-06-2013, 08:02 AM   #8
Porschefile
Major
16

 
Porschefile's Avatar
 
Drives: E92 M3
Join Date: Jul 2008
Location: Tennessee


Posts: 1,233
iTrader: (6)

Quote:
Originally Posted by krnnerdboy View Post
The rule of thumb on the z06 forums that I've read is, as long as the cracks don't connect your ok.
Same. I'd run them.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 12:38 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST