my new bracking system to my s2

[svendsvin]

hi here is my new brack system to my audi s2 limo

[S2 Ant]

Very nice...

Hope those discs are good as im going off X-Drilled discs... My Zimmerman Vented X-Drilled discs are developing small cracks around the drill holes.... they will be getting returned soon me thinks.

Def a v gd combination tho the AP Calipers and Ferodo pads!

[Sweeper]

how much it was ?

[dan_b]

Yes, nice calipers and you've definitely got the right pads there if they're the DS2500s...

@Ant - how long have you had your Zimmermans before they started cracking?

[dan_b]

What size discs have you got there?

[Lee]

AP supply DS2500 now as part of their kits. Disks should be 330x32mm for the standard S2 kit: Drilled disks are usually an option with these kits as the standard disk finish is (used to be at least) grooved.

[S2 Ant]

My discs have had less than 1yr of driving on them and its only day to day driving, never really had to really abuse them apart from possibly 3 or 4 occassions of stamping on the brakes but never continual abuse.

[panzerwagen]

Ant, you too with the Zimmermans eh?

I'm hearing alot of that happening over here in the States too. Maybe a bad batch from Zimmerman's factory?

[Jeffer]

My discs have had less than 1yr of driving on them and its only day to day driving, never really had to really abuse them apart from possibly 3 or 4 occassions of stamping on the brakes but never continual abuse.

My crossdrilled zimmermans 322 mm have no signs of cracking (after 2 years of abuse) what so ever. They do wear quickly, but that can also be due to the pads.

My 0,02 euro

[dan_b]

I'm hearing alot of that happening over here in the States too. Maybe a bad batch from Zimmerman's factory?

In my opinion this is inherent in X-drilled discs, be they cast holes or post-cast drilled holes. Casting the holes will reduce the cracking rate a little I guess, but if you put holes in the discs, they'll crack eventually. Too many stress points in an already stressed environment.

[ottawa coupe]

In my opinion this is inherent in X-drilled discs, be they cast holes or post-cast drilled holes. Casting the holes will reduce the cracking rate a little I guess, but if you put holes in the discs, they'll crack eventually. Too many stress points in an already stressed environment.

BINGO!!!!

i've never had x-drilled discs. had slotted for about 18 months on my mk3 golf before i sold it and they showed no signs of trouble, and i beat the snot outta that thing . right now both my cars have plain discs but that's because i didn't stop my mechanic in time! IMHO for the road, slots are much better because they don't develop cracks. i've heard too many stories of cracked x-drilled. not such a problem for track use or race use because you're probably gonna replace them often anyways.

it's just too much of a pain for a road car to change rotors every year.

[Jamo]

I'm in totally agreement, where's that guy who disagreed from another thread?