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
 
GetBMWParts
Post Reply
 
Thread Tools Search this Thread
      09-17-2011, 10:12 PM   #1
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

pad transfer and making popcorn?

2 questions. number one i have a significant amount of pad transfer on my front rotors. will spraying brake cleaner on them help with speed of removal as i have another track day shortly and dont want the wheel to shake as it is now because of the buildup. number 2 it sounds like i have a rock in my rear brakes as it sounds like im making popcorn when i go very slow 1-5mph in forward or reverse. how do i get that sucker out.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-18-2011, 12:27 AM   #2
Erhan
Colonel
Erhan's Avatar
United_States
37
Rep
2,466
Posts

 
Drives: Cooper S
Join Date: Oct 2008
Location: Seattle

iTrader: (0)

I'm confused... I thought you want to transfer pad material to the rotor... isn't that what bedding-in is?

I don't know how you fix your second problem. But it is not called popcorn noise, it is referred as cow bell noise. There are couple threads in the general forum, do a search.
__________________
2011 MINI Cooper S
previous cars: E92 M3, Z4MC, Z4 Roadster, E36 328 Sedan
Appreciate 0
      09-18-2011, 12:30 AM   #3
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

Okay I want less cow bell then. If you overheat the brakes and get a bunch of pad material on the rotors it causes a shudder on braking and has to be cleared so they perform properly again.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-18-2011, 12:40 AM   #4
r53s65e90
8300
r53s65e90's Avatar
United_States
6
Rep
543
Posts

 
Drives: r53 s65e90
Join Date: Mar 2009
Location: San Jose, CA

iTrader: (0)

Here is something that made sense to me. Haven't tried it.

http://www.stoptech.com/tech_info/wp_padremoval.shtml
Appreciate 0
      09-18-2011, 07:02 AM   #5
elh0102
Captain
7
Rep
704
Posts

 
Drives: E92 M3
Join Date: Apr 2010
Location: USA

iTrader: (0)

The article from StopTech is right on. I don't remove track pads until I get home from the track. The trip home with the more abbrasive pads is enough to clean the rotors, and they then accept the street pads without issue. To the OP, if you are getting substantially uneven deposits, it sounds like you are overheating the pad. I don't believe you mentioned the type of track pad you are using, but you may need something more aggressive.

Regarding the noise in the rear. It could be just what it sounds like, and small rock could be caught between the shield and rotor. If so, just push the shield out a little with a screwdriver and see if anything falls out. The cowbell noise, in my experience, was an issue with the e-brake.
__________________
2011 Space Gray Coupe, DCT, ZCP, StopTech ST-60/ST-40 BBK.
Appreciate 0
      09-18-2011, 09:49 AM   #6
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

I'm on stock pads and did overheat moreso than my last track day. In the past a fouple days of driving was all that was required to clear the deposits.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-18-2011, 12:46 PM   #7
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

Okay just trying to get it to clear before my next track day in a week. I'm gonna try some harder stops over the next week, just a couple each time I drive and speed up the process hopefully. Getting new pads and rotors shortly under warranty so will run them until time for another pad change.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-19-2011, 10:41 AM   #8
ring007
Major
ring007's Avatar
21
Rep
1,031
Posts

 
Drives: '10 GT3RS & '13 Cayenne GTS
Join Date: Nov 2008
Location: ///Iowa

iTrader: (13)

buy yourself a tub of the presoaked windex towels/rags from your favorite store and wipe down the rotors. Works every time for me when I've ended the track day with "shutter" to remove the excess deposits.
Appreciate 0
      09-19-2011, 11:13 AM   #9
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

okay windex that was the trick i was looking for. tried to find a rock in my wheel to eliminate the cow bell and wasnt one that i could see.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|

Last edited by 1MOREMOD; 09-19-2011 at 11:30 AM.
Appreciate 0
      09-19-2011, 11:30 AM   #10
persian54
Lieutenant General
persian54's Avatar
United_States
285
Rep
15,812
Posts

 
Drives: SL550. Prev: E93 M3/335i/Z435i
Join Date: Jun 2009
Location: The Valley, SoCal

iTrader: (291)

Quote:
Originally Posted by chriszeh View Post
okay windex that was the trick i was looking for. tried to find a rock in my wheel to eliminate the cow bell and wasnt one that i could see.
Report back once you do it please
Appreciate 0
      09-19-2011, 11:36 AM   #11
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

Quote:
Originally Posted by persian54 View Post
Report back once you do it please
okay plan on trying tomorrow.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-19-2011, 11:24 PM   #12
sc_tr0jan_m3
Major
13
Rep
1,265
Posts

 
Drives: CB 2004 E46 M3
Join Date: Feb 2009
Location: Bay Area, CA

iTrader: (0)

trying to remove judder with the same pad won't do you any good. you're going to need something more abrasive. either that or wait for awhile for the vibrations to go away eventually. i used to experience that with ferrodo pads and i tossed them because the deposits were so awful and the vibration shook the whole car.

i went to pfc zrated for the street and pfc01's for the track and couldn't be happier. they're compatible compounds so you barely have any issues with deposits when switching between the pads. i probably felt just a little judder for 2 laps, then the pfc01's were bedded in. likewise on the drive home... i kept the pfc01's on to scrub off any deposits, and the zrated pads went on when i got home. no issues, no fussing.
__________________
Quote:
Originally Posted by johnhk79 View Post
dude.. i have gas right now. curry will cause stank farts for me. if i drink lots of milk, then ill shart.
Appreciate 0
      09-20-2011, 02:14 AM   #13
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

Quote:
Originally Posted by sc_tr0jan_m3 View Post
trying to remove judder with the same pad won't do you any good.
sure it will. given enough braking and time i can remove my entire rotor surface until it isnt within spec so i can certainly remove deposits from a single day at the track. the deposits occur when the pad and rotor are both heated to a range way outside what i will ever see on the street. this is what causes the deposit or pad transfer in the first place. its removed again with normal braking. what i dont want to do is do a bunch of stops in a row simulating track braking as i will just incur more deposits, thus i am gradually wearing those said deposits down with varied routine braking at more normal speeds.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-20-2011, 05:26 AM   #14
LiM3y
Major
LiM3y's Avatar
United Kingdom
20
Rep
1,254
Posts

 
Drives: 2008 E90 M3
Join Date: Jun 2009
Location: CT

iTrader: (3)

Quote:
Originally Posted by sc_tr0jan_m3 View Post
trying to remove judder with the same pad won't do you any good. you're going to need something more abrasive. either that or wait for awhile for the vibrations to go away eventually. i used to experience that with ferrodo pads and i tossed them because the deposits were so awful and the vibration shook the whole car.

i went to pfc zrated for the street and pfc01's for the track and couldn't be happier. they're compatible compounds so you barely have any issues with deposits when switching between the pads. i probably felt just a little judder for 2 laps, then the pfc01's were bedded in. likewise on the drive home... i kept the pfc01's on to scrub off any deposits, and the zrated pads went on when i got home. no issues, no fussing.
Well...you tried!
__________________
Appreciate 0
      09-20-2011, 06:09 AM   #15
dawgdog
Colonel
29
Rep
2,178
Posts

 
Drives: 2015 M3, 2010 GT3RS
Join Date: Oct 2006
Location: Seattle, Wa.

iTrader: (0)

I had this issue with my stock rotors and the first few times the shudder went away after normal driving for a while. The last time it never did and I ditched the rotors and put on a BBK.
__________________
2015 f80 M3, 2010 GT3RS
Appreciate 0
      09-20-2011, 10:14 AM   #16
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

Thanks don't like to hear that. Its close to time for new rotors and pads anyway.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-20-2011, 11:56 AM   #17
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

i pulled the fronts this morning and wiped down the rotor surface really well with windex. seems to have removed a lot. i think the fact that my front tires have a huge amount of pick up on them as well is contributing to the shudder. havent went out for a drive yet but will today. hope its a little better.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
Appreciate 0
      09-20-2011, 02:22 PM   #18
1MOREMOD
2014 Track Days - 11|Ridge 1:52:24|Pacific 1:35:72
1MOREMOD's Avatar
United_States
174
Rep
13,015
Posts

 
Drives: Race car->
Join Date: Mar 2009
Location: check your mirrors

iTrader: (5)

fyi windex is no help. thinking i may have slightly warped my rotors last time out. getting new ones under warranty around christmas time thankfully.
__________________

02 Tiag e46 M3|6MT|GC plates|MCS c.o.|GC bars|GC race control arms|GC bushings|BW eng. & tran. mounts|subframe kit|BW race shifter|BW Jaffster|Euro header|BW exhaust|K&N c.a.i.|Epic race tune|Rouge pulleys|Seibon CF hood|CSL bumper|ST-40|XR-2|SS lines|half cage|Recaro profi|Profi 2 harness|BMWpedals|BW studs|
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 06:17 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