AP BBK juddering

KenM3csl · 07-03-2010, 03:18 PM

Sorry for another brake topic ,

I have the AP setup with DS2500 , my steering is going everywhere when i brake .
Sometimes after a longer easy drive it improves . After a few time hard braking it gets worse .
I know / hope that it' the DS2500 fault , I will purchase RS 29 very soon.
If I look at my disks there are some darker spots , is this the pad residue ?
Is there anyway I can confirm my disks aren't warped ?

Thanks

**shimmy** · 07-03-2010, 03:37 PM

AP + front DS2500 (on track) = brake judder

try the RS29 but you my have to get them skimmed or at least sand down the face and rebed in the brakes

you should have came back here earlier!!

KenM3csl · 07-03-2010, 04:12 PM

Thanks ,

I haven't even used them on track , apparrently I brake to much and to hard

.
How rough may the sandpaper be to sand the rotors ?
Indeed I was dumb

to use the DS 2500 , I hoped they where a little better .

DuncanR · 08-03-2010, 12:20 AM

And maybe ...just maybe...recheck wheel balance..throw the DS2500 away, they overheat too quickly ... allegedly

... they buggerred up "Nathan was green CSL but now grey wrap CSL" front AP's, and he had to skim them as Shim the Skim says.

**$w!ft** · 09-03-2010, 05:45 PM

Are DS2500 that bad? I was planning to use them on my Scooby with stock brembos for fast road driving....

Dan · 09-03-2010, 05:52 PM

Quote:

Originally Posted by $w!ft

Are DS2500 that bad? I was planning to use them on my Scooby with stock brembos for fast road driving....

From other car Marque's I've heard nothing but good things about them, my mate also used them in his Sapphire Cosworth on track and they were superb, similar weight to a CSL I should think and RWD...

Radders · 09-03-2010, 06:06 PM

i had the same issue using AP brakes and ds2500 pads.

use performance friction discs and rs29's

**shimmy** · 09-03-2010, 06:08 PM

Quote:

Originally Posted by Dan

From other car Marque's I've heard nothing but good things about them, my mate also used them in his Sapphire Cosworth on track and they were superb, similar weight to a CSL I should think and RWD...

as far as i can make out the DS2500 cannot cope withe the heat that the front AP brakes kick out.

I still use them on the rear AP calipers and even until recently used to swap them in at the front in between trackdays (until i found the marvellous RS14 no squeal and low temp bite pads)

I think on lighter cars withless heat they would be ok for trackdays. I know they work ok on E36

flow · 09-03-2010, 06:42 PM

I warped my AP disks after the first trackday with ds3000 .
I skimmed them and fitted the Rs29 and after alot of trackdays they are still great .

07-03-2010, 03:37 PM	#2
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	AP + front DS2500 (on track) = brake judder try the RS29 but you my have to get them skimmed or at least sand down the face and rebed in the brakes you should have came back here earlier!! __________________ .

08-03-2010, 12:20 AM	#4
DuncanR CSL Register Uber-poster! Join Date: Sep 2009 Location: Olney, Bucks Posts: 3,735 Casino cash: $9984	And maybe ...just maybe...recheck wheel balance..throw the DS2500 away, they overheat too quickly ... allegedly... they buggerred up "Nathan was green CSL but now grey wrap CSL" front AP's, and he had to skim them as Shim the Skim says.

09-03-2010, 06:06 PM	#7
Radders S5 - Full Throttle Join Date: Jan 2009 Location: Merseyside Posts: 371 Casino cash: $551	i had the same issue using AP brakes and ds2500 pads. use performance friction discs and rs29's __________________ the CSL, better that a 70k Porsche!

09-03-2010, 06:42 PM	#9
flow S4 - Getting the hang of it Join Date: Feb 2009 Location: Belgium Posts: 176 Casino cash: $9921	I warped my AP disks after the first trackday with ds3000 . I skimmed them and fitted the Rs29 and after alot of trackdays they are still great . __________________ '04 996 GT3 MK2 CS '03 CSL '12 Megane RS265

07-03-2010, 04:12 PM	#3
KenM3csl Wonky 'L' after Washing Join Date: Mar 2009 Posts: 19 Casino cash: $1874	Thanks , I haven't even used them on track , apparrently I brake to much and to hard . How rough may the sandpaper be to sand the rotors ? Indeed I was dumb to use the DS 2500 , I hoped they where a little better .

09-03-2010, 05:45 PM	#5
$w!ft S5 - Full Throttle Join Date: Oct 2009 Location: London (W1) Posts: 309 Casino cash: $3311	Are DS2500 that bad? I was planning to use them on my Scooby with stock brembos for fast road driving....