[s-cars] RE: big rear brakes

[Toborg Michael (AC-SM/ESC5)]

I think my "deal" is about as good as you can get from one of the better
online places. I got some 5ktq parts a while back, and it was about the
same as anyone else gets.
If I find any loopholes though....
MT

-----Original Message-----
From: Gabriel Caldwell [mailto:gabriel at ts.bc.ca] 
Sent: Thursday, February 17, 2005 3:41 PM
To: Toborg Michael (AC-SM/ESC5); keith at maddock.com
Cc: Krasusky Paul (WQQ2PXK); Bill Mahoney; s-car-list at audifans.com
Subject: RE: [s-cars] RE: big rear brakes

Bosch.com?  Can you get deals on parts?  ;)

Gabriel Caldwell

-----Original Message-----
From: Toborg Michael (AC-SM/ESC5) [mailto:Michael.Toborg at us.bosch.com] 
Sent: February 17, 2005 1:36 PM
To: keith at maddock.com
Cc: Krasusky Paul (WQQ2PXK); Bill Mahoney; s-car-list at audifans.com
Subject: RE: [s-cars] RE: big rear brakes

I don't work on the EHB systems, but I'm in that division so this is
only one step above recreational speculation,
The hydraulic units can only build up to a certain pressure, not exactly
sure how many bar that is, I don't think pressure was really the issue. 
It must have been that they needed so much torque at the wheel, and that
drove the dual calipers, then the dual calipers need a certain amount of
volume to build torque, which called for 2 EHB units. The system has to
be able to move enough fluid to fill all the calipers in a certain
amount of time to get the stopping distance and the vehicle controller
(ESP) interventions fast enough.
The SBC already has a hydraulic back up built into it if the system
shuts down, so I think Daimler and Bosch trusted the system.
And, since that is kind of the flagship, I think technology for
technology sake had something to do with it. 
The UrS's have an older bosch ABS in them, but I haven't poked around
into it yet, just got my car recently!
Mike

-----Original Message-----
From: Keith Maddock [mailto:keith.maddock at gmail.com] 
Sent: Thursday, February 17, 2005 12:09 PM
To: Toborg Michael (AC-SM/ESC5)
Cc: Krasusky Paul (WQQ2PXK); s-car-list at audifans.com; Bill Mahoney
Subject: Re: [s-cars] RE: big rear brakes

Toborg Michael (AC-SM/ESC5) <Michael.Toborg at us.bosch.com> wrote:
> 
> Mmmm, twin EHB units on that boat, Or as Daimler calls it SBC.

Was the reason for that
A) They couldnt get enough pressure/torque out of one brake system?
B) They weren't confident in EHB reliability ?
or
C) Technology for the sake of Technology?

> In addition to getting a lot more brake torque out of the package, the
> two calipers can be controlled out of phase with eachother so that the
> ABS performance is smoother.

How does that work?  Isn't the target of ABS to be a slip controller,
not a brake torque controller ?

Anyway, welcome to the list - are you in Farmington Hills then?

Cheers,
Keith
A2 / Livonia
95.5 S6 Avant , Emerald Green, MI plate "NBGRING"



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