MyE28.com

gaza01 wrote:Since the OP has gone quiet on this I bit the bullet and got measuring for a bracket for the 996 calipers. This is for to work with the 3.6 m5 rear discs. Here's the prototype and it mounted.

tschultz wrote:In an E28 M5 the front brake rotors will warp with stock rears because they are too much front biased. When you add the 540i rears, the same thing happens where the bias goes slightly too far rear, but is slightly less pronounced since there is SLS and a battery in the back. I installed the same calipers in the rear and noticed the same phenomenon. The ABS makes it more difficult to tell, but the system is modulating rear brake lock if the pads are the same front to rear.

The 528e, 535i and 635CSi all have their batteries up front and lighter rear end than the M5 and E32/ E34 540i/M5.

This results in rear biased brakes which I found out at the track.

Front:
Model Disc Size Piston Size Wheel size required
E24 / E28 628, 635csi 282x25mm 1x57mm 14?
E24 / E28 M5,M635csi 300x30mm 4x40mm 15?
E34 525,530,535 302x22mm 1x60mm 15?
E34 540 / E32 735, 740, 750 302x28mm 1x60mm 15?
E34 M5 3.6 315x28mm 1x60mm 16?

Rear:
Model Disc Size Piston Size Wheel size required
E24 / E28 All Models 284x10mm 1x36mm 14?
E34 525, 530, 535 300x10mm 1x38mm 15?
E34 540, M5 300x20mm 1x40mm 15?

Brake Bias for E28:
Stock Bias: 70/30
E32/E34 Brakes Bias: 68/32
E34 M5 3.6 Brakes Bias: 69/31 (and the most stopping power)

Balance and more detail is shared here:
http://www.bmwe34.net/E34main/Upgrade/Data/mbrake.pdf

More detail in brakes forces of each here: http://bigcoupe.com/phpBB2/viewtopic.php?t=2137

Jan E-28 wrote:Talked to one today that given up on finding the rear Nürburgring brakes and carriers for 328x20 disks.
So he started to experiment. And found out that E90 carriers has the extra depth he needed that is unique to the 34212227875 carriers. Only drawback are that the sliders are further apart. But by fixing X5 calipers to it he got bolt on rear set for the 328x20 disks on his E34 M5. That should also make it a bolt on to E28

Nice bonus with that setup was also that he can now use more inexpensive pads that has the 42mm clip. Not the unique expensive 40mm clip pads that the Nürburgring brakes has.

maxpossu wrote: Dec 27, 2020 3:16 PM Hello & happy new year!

Finally had some time off and managed to fab up 996 brackets:







Just test fitted them on the trailing arm and im very happy with the results so far.

I´ll try to post more photots briefly.

CAn You see the photos ?

maxpossu wrote: Dec 29, 2020 6:25 AM Yo Enthusiasts,

Here comes few more pics...

Had to do few iterations until the fitment was flush.. As always with prototyping.











Bolts are temporary, i could not find propoer ones Brakediscs are 750iL 328x20.

Zeuropa wrote: Apr 13, 2021 10:50 PM Hello maxpossu,

In this picture, I assume that the caliper isn't fully positioned on the rotor here - it seems to be sitting high. Also, please confirm that the e-brake drum in this e38 rotor is fully compatible with the e28 e-brake. Correct?

Thanks! Let's not let this project die.