It\'s true what they say about drilled discs! Badly cracked on track.

[lockwood77]

Well, these were on the car when I bought them and have survived two trackdays, but now the Mintex Xtreme pads are on, it was too much for them round Donington...











Time for some new ones! :rolleyes:

[Nik da Greek]

Yikes! that\'s nasty. Any idea what make they were, so I can avoid them in the future?

[lockwood77]

No idea sadly - the previous owner (Pete Taylor, he\'s on here) bought them from the States apparently.

[RemarkLima]

Drilled discs always do that IME, doesn\'t matter what brand (unless they\'re cast with the holes in them = £££), just the nature of them sadly.

[T11MNM]

Slightly off topic, what exhaust setup do you run to beat donningtons strict sound level rescrictions?

[lockwood77]

I\'ve got a FEED downpipe, de-cat and 5Zigen backbox. Couldn\'t tell you what mid-pipe it is though, so not sure whether the de-cat and mid-pipe are silenced. It is very quiet - I had to change the backbox specifically for trackdays, cos the other one was a massive can that popped and banged at will!

The 5Zigen is more restrictive though - Pip said I\'d have a few more horses with the bigger can, but it\'d be pointless if I couldn\'t go on track!

[karl_tate]

i take it grooved doesnt affect the discs though??
 
they look really bad

[lockwood77]

I think it\'s the drilling that causes it, yeah. Grooved give you a nice rumbling sound when braking hard though!

[rx7veilside]

i think drilled are ok when u get the big bucks versions..porche etc but budget ones will crack but even so that cracking is  bad

[Fish]

There have been cases of grooved also cracking, but they can take a lot more than drilled.

Even the Porsche cast drilled discs crack if given a hard life.

Dono is a great track with a good setup. God I miss trackdays.

Fish

[lockwood77]

I didn\'t even think I was braking that hard! :evillaugh

[T11MNM]

I did a few track days on grooved disks and never had a problem, love the noise they make as well.

Donnington is great!

[noyzboy]

I saw a rally car recently that had dimpled grooved discs. i.e. not drilled right through.
Guy uses them after having a big off when a wheel locked on a cracked drilled disc.
He claimed they are still effective at getting the gases generated in braking out from the calliper area.
 Interesting. I had not seen them before.
 This could be the way to go.

Martin H

[RemarkLima]

EBC do the turbo grooved discs:
http://www.ebcbrakes.com/rotorinfo.html

Basically dimpled, I\'ved used them in the past and with pretty good effect. Dunno if they come in FD sizes however...

[lockwood77]

Yeah, I used those EBC dimpled discs on my first DC2 years ago, they warped almost instantly (using Greenstuff pads too!) They weren\'t awful, but definitely a little shaky.