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 > Suspension | Brakes | Chassis
 
Post Reply
 
Thread Tools Search this Thread
      02-28-2013, 09:56 PM   #1
dmw16
Captain
18
Rep
931
Posts

 
Drives: 2005 ///M3
Join Date: Aug 2010
Location: Maryland

iTrader: (1)

PFC01 Pads Making Sparks?

I just installed a pair of stoptech st40 calipers and 355mm rotors on my E46 M3. And tonight I took it out to do a few 60-5 runs to bed the pads in.

Here's the thing, from the passenger side I saw sparks under heavy braking.

Please note that the rotors have about 500 miles on them using the stoptech pads. So is this normal?
Appreciate 0
      03-01-2013, 07:41 AM   #2
TC Kline Racing
BimmerPost Supporting Vendor
TC Kline Racing's Avatar
United_States
7
Rep
330
Posts


 
Drives: Many BMW's & Porsche's
Join Date: Mar 2012
Location: Columbus, OH & Santa Barbara, CA

iTrader: (0)

Are the pads new? If so, that is totally normal. Alot of times there is sediment, or the edges are not chamfered which causes the sparks upon bed-in. Either way, I wouldn't worry about it.

I've done a bed-in before many times on track pads with non-chamfered edges and it's a spark show at 10pm at night

Is it making a loud grinding noise, or does it sound normal?

Chamfered:



Non-chamfered (which is what you may have)

Appreciate 0
      03-01-2013, 07:57 AM   #3
dmw16
Captain
18
Rep
931
Posts

 
Drives: 2005 ///M3
Join Date: Aug 2010
Location: Maryland

iTrader: (1)

Thanks for the info.

They aren't making any particular noise. Yes, the pads are brand new and I believe they aren't chamfered. So I suppose that's what's going on.

It seemed a little weird that they weren't sparking from both sides, but everything seems normal otherwise - no pulling or anything.
Appreciate 0
      03-01-2013, 08:21 AM   #4
TC Kline Racing
BimmerPost Supporting Vendor
TC Kline Racing's Avatar
United_States
7
Rep
330
Posts


 
Drives: Many BMW's & Porsche's
Join Date: Mar 2012
Location: Columbus, OH & Santa Barbara, CA

iTrader: (0)

Quote:
Originally Posted by dmw16 View Post
Thanks for the info.

They aren't making any particular noise. Yes, the pads are brand new and I believe they aren't chamfered. So I suppose that's what's going on.

It seemed a little weird that they weren't sparking from both sides, but everything seems normal otherwise - no pulling or anything.
Then, yes, that's what it was. Carry on hooning and enjoy that BBK
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 12:03 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