Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - F01 / F02 (2009 - current)

7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

Reply
 
Thread Tools Display Modes
  #1  
Old 02-23-2013, 07:29 AM
BPHBimmer BPHBimmer is offline
Registered User
Location: Mass
 
Join Date: Jan 2013
Posts: 25
Mein Auto: 11 750i XDrive MSport
Crossed drilled rotors

Has anyone ever seen cross drilled or slotted rotors for the F01?
Reply With Quote
Advertisement
  #2  
Old 02-23-2013, 12:24 PM
Tuesday Tuesday is offline
.
Location: .
 
Join Date: May 2012
Posts: 283
Mein Auto: .
On eBay - you know how that story always goes...

Also interested in a quality set for the front if anyone has found a reliable brand that doesn't rust up on a humid day.
Reply With Quote
  #3  
Old 02-24-2013, 11:53 PM
tturedraider's Avatar
tturedraider tturedraider is offline
Freedom isn't free!!
Location: Chicago, north shore (via Tennessee & Texas)
 
Join Date: Nov 2005
Posts: 15,117
Mein Auto: '06 Sonora/Beige 330i :-)
Cross drilled rotors are much more susceptible to developing hairline cracks and therefore must be thicker. BMW doesn't use them much.
__________________

"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- Geo. Orwell

2006 330i Sonora w/ ActiveAutoWerke flash tune :-)
2004 330i ZHP Imola/NB - missed
2000 328i TiAg - gone but not forgotten

** Join the BMW CCA www.bmwcca.org
member #388003 - Use me as a referral & you could win a one day ///M Driving School!! **
Reply With Quote
  #4  
Old 02-25-2013, 03:17 PM
BPHBimmer BPHBimmer is offline
Registered User
Location: Mass
 
Join Date: Jan 2013
Posts: 25
Mein Auto: 11 750i XDrive MSport
I understand about the added chance of hairline fractures but feel a quality set would stand up fine unless you were running at the track (certainly not me) I am somewhat of an aggressive driver but not to the point of extremes. Love the look....that's all.
Reply With Quote
  #5  
Old 02-25-2013, 04:54 PM
chrischeung chrischeung is online now
Officially Welcomed to the 'Fest
Location: Dallas, TX
 
Join Date: Sep 2002
Posts: 7,448
Mein Auto: 2012 ActiveHybrid 7 SWB
It will also potentially be less stopping power. Why? Because there is less surface area with holes.
__________________
2012 ActiveHybrid 750i ED

3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
4/10 ED 5 - thread ID 453501
5/08 ED 4 - thread ID 290679
3/07 ED 3 - thread ID 201013
3/06 ED 2 - thread ID 136454
Reply With Quote
  #6  
Old 02-26-2013, 03:38 PM
BPHBimmer BPHBimmer is offline
Registered User
Location: Mass
 
Join Date: Jan 2013
Posts: 25
Mein Auto: 11 750i XDrive MSport
Also, I don't understand why there is so much negative press about crossed drilled rotors when every super car on the market today uses them. Ferrari, Lamborghini, Porsche, Aston, Bugatti, and even our M Series Cars, etc. Point, why would all these engineers design cars with them if they were less efficient...doesn't make much sense to me.
Reply With Quote
  #7  
Old 02-26-2013, 05:12 PM
chrischeung chrischeung is online now
Officially Welcomed to the 'Fest
Location: Dallas, TX
 
Join Date: Sep 2002
Posts: 7,448
Mein Auto: 2012 ActiveHybrid 7 SWB
Because they are designed for the car out of the factory. You are going against what the factory provides, and installing the same sized rotors with holes when they didn't expect you to. For all we know they may even be heavier (which is a negative).

Cross drilled rotors have been tested and proven to provide the same or less stopping power in street applications. Their main benefit is that they cool faster and are mainly for track applications, where they are needed in quick repeat, hard stops. If they were that good, why wouldn't they be standard on all cars? You'd think better brakes would be safer and help you sell more cars.

If you want to get them because they look good - fine. Just don't think they'll be any better at stopping is all we're saying.
__________________
2012 ActiveHybrid 750i ED

3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
4/10 ED 5 - thread ID 453501
5/08 ED 4 - thread ID 290679
3/07 ED 3 - thread ID 201013
3/06 ED 2 - thread ID 136454

Last edited by chrischeung; 02-26-2013 at 05:28 PM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - F01 / F02 (2009 - current)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 12:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms