brake vibration / judder

Jon8710 · 01-02-2016, 02:04 PM

Hello all

wondering if you could help seeing as we are all so clever and all,
iv got a e36 328i that I track fairly hard,

I have uprated the brakes to the e46 330i upgrade that you can do as it is a bolt on swap and the braking is so much better along with the evo master cylinder and Carbone loran pads it really is good for a car that weighs 1200kg.

I have noticed that I get a lot of steering wheel judder after a spirited 20 mins out on track, this does not seem to be as bad after I let it all cool down after a rest but does return again.

is this due to the discs being warped or could it be down to pad deposits on the discs ?

I have replaced the discs a few times over the years I also replaced the rack but this seems to return after not so long do you think I would be better changing the pads to rs29's or is it a disk issue ?

cheers

Trawler · 01-02-2016, 06:47 PM

I have no idea, but have had vibration problems twice..

First time sticking piston. Second time because I was not breaking hard enough. Thought it was warped discs. Instructor took a look then just said break harder. Sceptical at first, but cured problem every time.

billyboysm3 · 01-02-2016, 07:48 PM

What's pads are on it at the moment?

cslsuperfan · 01-02-2016, 08:17 PM

Quote:

Originally Posted by billyboysm3

What's pads are on it at the moment?

Carbone Loran

Jon8710 · 01-02-2016, 08:30 PM

thats right
carbone lorraine
see link
http://www.demon-tweeks.co.uk/motors...s-rc6-compound

they are pretty decent in all honest

any thought to it being deposits on the disc ?

mattCSLnut · 01-02-2016, 08:33 PM

What sort of front brake cooling solution do you have deployed at the moment Jon ? It sound to me like brake overheating issue. Also worth checking the quality of your brake fluid and change it if you haven't been doing so regularly as moisture in the brake fluidd can cause similar symptoms.

trackm3 · 01-02-2016, 09:02 PM

Try cleaning the disk faces, palm sander and 80 grit wet and dry ?

octainejunkee · 02-02-2016, 12:00 AM

It'l be pad deposits building up on the discs.
A bit of road driving may clean them up or if not, you may have to get them re skimmed.

cslsuperfan · 02-02-2016, 12:25 AM

Quote:

Originally Posted by octainejunkee

It'l be pad deposits building up on the discs.
A bit of road driving may clean them up or if not, you may have to get them re skimmed.

Sounds favourite

I've found being conservative with the braking has led to similar issues

Stand on that middle pedal like your life depends on it....this will greatly reduce any deformation and deposit build up.

Jon8710 · 02-02-2016, 11:01 AM

cheers all

I will try rubbing them down and check the callipers are all free,

bloody hell I cant stand on the thing any harder my foot will go through the floor Fred Flintstone esq

01-02-2016, 02:04 PM	#1
Jon8710 S5, Sport Off, DSC M-track Join Date: May 2012 Location: london Posts: 563 Casino cash: $8371	brake vibration / judder Hello all wondering if you could help seeing as we are all so clever and all, iv got a e36 328i that I track fairly hard, I have uprated the brakes to the e46 330i upgrade that you can do as it is a bolt on swap and the braking is so much better along with the evo master cylinder and Carbone loran pads it really is good for a car that weighs 1200kg. I have noticed that I get a lot of steering wheel judder after a spirited 20 mins out on track, this does not seem to be as bad after I let it all cool down after a rest but does return again. is this due to the discs being warped or could it be down to pad deposits on the discs ? I have replaced the discs a few times over the years I also replaced the rack but this seems to return after not so long do you think I would be better changing the pads to rs29's or is it a disk issue ? cheers __________________ 1979 E24 635csi , 730d work horse , Porsche GT4

01-02-2016, 08:30 PM	#5
Jon8710 S5, Sport Off, DSC M-track Join Date: May 2012 Location: london Posts: 563 Casino cash: $8371	thats right carbone lorraine see link http://www.demon-tweeks.co.uk/motors...s-rc6-compound they are pretty decent in all honest any thought to it being deposits on the disc ? __________________ 1979 E24 635csi , 730d work horse , Porsche GT4

01-02-2016, 08:33 PM	#6
mattCSLnut CSL Register Uber-poster! Join Date: Sep 2009 Location: Cambridge Posts: 6,460 Casino cash: $27763	What sort of front brake cooling solution do you have deployed at the moment Jon ? It sound to me like brake overheating issue. Also worth checking the quality of your brake fluid and change it if you haven't been doing so regularly as moisture in the brake fluidd can cause similar symptoms. __________________ UK CSL No.020 ... after 7 years of ownership I've now SOLD it !!!

02-02-2016, 11:01 AM	#10
Jon8710 S5, Sport Off, DSC M-track Join Date: May 2012 Location: london Posts: 563 Casino cash: $8371	cheers all I will try rubbing them down and check the callipers are all free, bloody hell I cant stand on the thing any harder my foot will go through the floor Fred Flintstone esq __________________ 1979 E24 635csi , 730d work horse , Porsche GT4

01-02-2016, 06:47 PM	#2
Trawler Driving it like I nicked it Join Date: Dec 2008 Posts: 2,213 Casino cash: $25916	I have no idea, but have had vibration problems twice.. First time sticking piston. Second time because I was not breaking hard enough. Thought it was warped discs. Instructor took a look then just said break harder. Sceptical at first, but cured problem every time.

01-02-2016, 07:48 PM	#3
billyboysm3 CSL Register Uber-poster! Join Date: May 2011 Posts: 3,001 Casino cash: $25206	What's pads are on it at the moment?

01-02-2016, 09:02 PM	#7
trackm3 S5 - Full Throttle Join Date: Sep 2009 Posts: 411 Casino cash: $18073	Try cleaning the disk faces, palm sander and 80 grit wet and dry ?

02-02-2016, 12:00 AM	#8
octainejunkee S3 - On the open road Join Date: Jul 2013 Location: gatwick Posts: 115 Casino cash: $31	It'l be pad deposits building up on the discs. A bit of road driving may clean them up or if not, you may have to get them re skimmed.