Fwd: Brake Balance

Taka Mizutani t44tqtro at gmail.com
Thu Jan 11 13:55:00 EST 2007


Can someone help this guy out?

---------- Forwarded message ----------
From: Ron <vze8lher at verizon.net>
Date: Jan 11, 2007 10:20 AM
Subject: RE: Brake Balance
To: Taka Mizutani <t44tqtro at gmail.com>
Cc: quattro at audifans.com

Hello-
I'm sorry to email you directly, but I joined this list in order to try to
find a front strut brace for my '85 4000 Quattro, and to have some sort of
reference for technical questions. I have tried to have my "question" posted
to the group, but it never makes it. I have searched the archives
extensively to no avail. I think the term "archives" applies only in the
loosest of definitions.............
I know that I'm not really using the correct "nomenclature" for my car (I'm
not sure what the correct name is {type 85??}, but I guess that makes me an
ignorant Audi dork of some sort not worthy of a reply), but I'm still into
my car. No, it's not turbo, no, I don't own 6 Audis, I haven't spent $50,000
on my car, no I don't know the "real" name of the car, or what they call it
in Europe or whatever. I still have the whole front end of my car apart,
motor/transmission out, and the cylinder head is in Germany for some
"special" work. What I'm saying is that I'm still into my car, if I'm a bit
of a neophile.
What it really boils down to is that I need some kind of answer- if this is
"the" Audi discussion group, I don't understand why someone can't just
answer my question, or school me a bit, instead of just snubbing me.
I guess if I don't get an answer I'll know what's really up with the whole
Audi scene.
Thanks in advance.

Ron Hollaender

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Taka Mizutani
Sent: Wednesday, January 10, 2007 9:00 PM
To: Grant Lenahan
Cc: quattro at audifans.com
Subject: Re: Brake Balance

Grant-
I know that you're doing more like 80-90% of the braking in the front.
However,
the initial brake drag on the rears is a characteristic of most VW/Audi cars
running
Bosch 5.1 and newer, exactly how I described.

If you "drive it like you stole it" all the time, then you would not see
this phenomenon,
but I don't know too many people that do that.

When you mention your S4 and S6, both of those cars have the Lucas/Girling
4-pad,
2-piston caliper setup. I don't know how that factors in, all of the cars I
was talking about
are single-piston setups. Maybe the cars with the big brakes act a little
differently.

The brake proportioning is conducted via the ABS system, all the time- at
least that is
my understanding of the system, although I could very well be wrong.

I did not see anything like this on my 5ktq or 200q, both pre-5.1 systems. I
have only noticed
the high rear brake pad wear on VW/Audi cars with 5.1 or 5.3 ABS.

I will have to see what comes of the V70R which also has a Bosch brake
system, I think-
I haven't really been under the hood of that car very much. I know that the
front pads in
the V70R were fairly worn in 19k miles, the rears look fine. Maybe Volvo
does not spec
a calibration like VW. All 4 wheels dust an insane amount on the Volvo,
though, so the rears
are definitely doing something even in everyday driving. Either that, or
having 4 piston brakes
all around with huge rotors and pads simply makes a ton of dust.

Taka


On 1/10/07, Grant Lenahan <glenahan at vfemail.net> wrote:
>
> Not my experience, although the explanation sounds a little plausible -
> but only up to a point. Read on.
>
> However, on more serious braking, ABS cannot do what you say and still
> have the car brake effectively.  braking grip is proportinal to weight.
> Weight in an Audi, on deceleration, will probably be 70% of more to the
> front.  QED.
>
> Grant
>
>
_______________________________________________
quattro mailing list
quattro at audifans.com
http://www.audifans.com/mailman/listinfo/quattro
---
Watch this space for ads :)


More information about the quattro mailing list