Re: E28 M5 brakes to E12 ?

[rusmaster <rusmaster@xxxxxxxxxxxxx>]

Chris,
	The difference in M5 to 535i is size and caliper.  The M5 uses 4 piston Brmbo
type and bigger rotors.  Below is the info that Rob Lenison gave me.

Dinan/850 rotors: 324mm
E32: 302x28mm
E28 M5: 300x30mm (but with larger hats, therefore much less swept area)

The 850 came with 16" rims originally, 17" was a common option bu
unneccessary.  BMW calipers are space-efficient and even though the
Dinan/850 units are Brembo, they are a similar design.  The E32 brakes fit
under 15" rims.

The stock 535i brakes are I think ~260mmx28mm.  Rob L. might have better info.
 If I were you I'd go the E32 brakes.  They bolt right up to the E28.  E12 I
don't know about.  There may be a problem with the ABS ribs and sensors for
the E32/E28 to E12 brakes.  I would email Steve D'G and the Ultimate Garage,
he may be able to help also.  See Ben Laiws big link page.

Take Care,
Russ

 
> ------------------------------
> 
> Date: Sun, 11 Apr 1999 19:40:55 -0400
> From: Chris Graff <GraffF1@domain.elided>
> Subject: E28 M5 brakes to E12 ?
> 
> Some questions:
> 
> First, what's the difference between regular E28 brakes and the M5
> brakes if there is any? Rotor diameter? Different calipers? Also, do E28
> M5 brakes (if they are bigger/better) fit on a regular 535i?
> 
> Now, on to the next question? Would those same E28 M5 brakes (rotors,
> calipers, pads) fit onto an E12? What would be the differences between
> E12's and E28's? Also, what would the problems of such a retrofit be?
> 
> Any information would be GREATLY appreciated!
> 
> 
> :)Regards
> - -Chris Graff
> 
> Middletown, New Jersey
> GraffF1@domain.elided
> 
> 1986 BMW M535i   =8^)
> M535i: Unofficial Website and Online Registry -
> - - http://www.geocities.com/MotorCity/Downs/5008/m_index.html
> M535i Mailing List Coordinator -
> - - http://M535i.listbot.com
> BMW CCA 159803 - NJ Chapter
> Senior Six Registry #184
> GP2 Simulation Racer ;-)
> 
> ------------------------------

------------------------------