Brake disk size on a 2.8

UK forum for general and technical discussion about the Z3 roadster

Moderator: Gazza

Post Reply
VikingSven
Joined: Sat 22 May, 2010 18:16
Posts: 195

  Z3 roadster 2.8
Location: Leeds

Brake disk size on a 2.8

Post by VikingSven » Wed 01 Sep, 2010 16:22

My Z3 is a 1999 2.8L. I've bought some replacement front disks, and which are 300mm, but the garage has just told me they're too big. The company I bought them from has checked all their product listings for my spec car, and all the manufacturers list it as needing 300mm disks.
Any idea what size they should be?

User avatar
markrnorton
Joined: Mon 05 Jan, 2009 13:19
Posts: 841

  Other roadster
Location: Essex

Post by markrnorton » Wed 01 Sep, 2010 16:26

286mm
Still modifying

VikingSven
Joined: Sat 22 May, 2010 18:16
Posts: 195

  Z3 roadster 2.8
Location: Leeds

Post by VikingSven » Wed 01 Sep, 2010 16:55

Cheers :)
Just been searching around, some disc manufacturers list the 2.8 as needing 286mm, and others say 300mm.
Was there an option to have bigger discs, or were they changed at some point?

User avatar
markrnorton
Joined: Mon 05 Jan, 2009 13:19
Posts: 841

  Other roadster
Location: Essex

Post by markrnorton » Wed 01 Sep, 2010 17:07

i thought the 300mm disks were for the 3.0 Litre model
Still modifying

VikingSven
Joined: Sat 22 May, 2010 18:16
Posts: 195

  Z3 roadster 2.8
Location: Leeds

Post by VikingSven » Wed 01 Sep, 2010 17:28

Looking at these:
http://www.europerformance.co.uk/pages/ ... brakediscs
Brembo and EBC list the 2.8 as 286mm, the rest have it as 300mm

Tori
Joined: Sun 24 Jan, 2010 18:07
Posts: 837

  Z3 roadster 2.8
Location: Ipswich
Contact:

Post by Tori » Wed 01 Sep, 2010 17:47

If you can get hold of some brake caliper carrier brackets from an E46 you will be able to fit the 300mm discs using the exsisting calipers.

If you look up part no 34106758120 on realoem.com you can cross reference it and it will list all models that had them fitted, I got mine from a E46 328ci, have a look at my post in the gallery section :wink:
Image
Now for sale £6000 Ono

User avatar
komis
Joined: Wed 01 Dec, 2004 11:18
Posts: 475

  Z3 roadster 2.8

Post by komis » Thu 02 Sep, 2010 08:27

While on this subject, i've always found my 2.8's brakes a bit disappointing, without any real bite to them. My pal's ///M roadster has infinitely better braking but what hurts more, is that so does my dad's Audi A3 1.6 lol

So... anyone tried to fit M brakes to a 2.8 and is there any other advice on what would give the brakes some notable improvement in performance?
wwwwOOOff!!!
Image

Tori
Joined: Sun 24 Jan, 2010 18:07
Posts: 837

  Z3 roadster 2.8
Location: Ipswich
Contact:

Post by Tori » Thu 02 Sep, 2010 18:14

I was told you would need to change the hubs and the servo to fit ///M brakes.
Image
Now for sale £6000 Ono

User avatar
komis
Joined: Wed 01 Dec, 2004 11:18
Posts: 475

  Z3 roadster 2.8

Post by komis » Fri 03 Sep, 2010 17:25

thanks :) obviously your new brakes won't have "settled" in yet, but have you noticed any improvement over the old 286mm discs?
wwwwOOOff!!!
Image

Tori
Joined: Sun 24 Jan, 2010 18:07
Posts: 837

  Z3 roadster 2.8
Location: Ipswich
Contact:

Post by Tori » Fri 03 Sep, 2010 17:50

komis wrote:thanks :) obviously your new brakes won't have "settled" in yet, but have you noticed any improvement over the old 286mm discs?
Well I have only done about 120 miles on them so youre right they are not yet bedded in, however I have noticed the yellowstuff pads do seem to have quite a nice initial bite and feel to them over the standard pads.
Image
Now for sale £6000 Ono

Post Reply

Who is online

Users browsing this forum: No registered users and 7 guests