[s-cars] Re: Big Red Rear Brakes

Tue Oct 21 01:59:16 EDT 2003

Hi Fred,

Are the rear BRs on your beautiful blue V8 S6 avant?  i wonder if later/more
advanced ESP and more advanced ABS as well as larger contact patch (265m!)
have something to do with your better results (vs. early '90's UrS?). Also i
think the Avant has better weight distribution so the rears would have more
grip at the contact patch.

yep,YMMV!

Leigh
----- Original Message -----
From: "Frederic L'Huillier" <flhuilli at hotmail.com>
To: <leigha at teleport.com>; <s-car-list at audifans.com>
Sent: Sunday, October 19, 2003 11:47 PM
Subject: Re: [s-cars] Re: Big Red Rear Brakes

> Hi,
>
> As I have the BR on 4 wheels on my car, I will drop a few words on this
> topic:
>
> Yes it does make a difference in term of performance. To a point where a
> Lotus Elise on track was pretty close to damage my rear bumper ! Jim Klein
> from California drove my car a few weeks ago and he confirmed it is much
> better than just the front BR.
>
> I believe Movit HQ did only one car: Mine. Actually it used to be on their
> web site under the S4 section. It is not there anymore. The previous owner
> told me that Movit had to do a lot of work to make the rear BR work
> properly. A lot of parts had to be made for the rear BR. Because the
> previous owner owned a couple of sport car magazines, Movit did it. It
would
> have been you or me, they would not have done it ! I have checked recently
> for other French Audi Club member and received a huge No More !
> I am waiting the estimation of the value of those BRs for my insurance.
The
> bill is at least 10000 dollars.
>
> You need a sport suspension to keep up with such brakes system. I had my
> Bilstein rebuilt to a much harder setup. In term of tires, I do have
265/35
> x 18.
>
> My 0,002 old Francs
>
> Regards,
> Frederic
>
>
> >From: "Leigh Anderson" <leigha at teleport.com>
> >To: <s-car-list at audifans.com>
> >Subject: [s-cars] Re: Big Red Rear Brakes
> >Date: Mon, 20 Oct 2003 10:06:04 -0700
> >
> >Hi Todd,
> >
> >I have a few thoughts, btdt for putting big brakes on back of an UrS6...
> >I'm skeptical of the performance benefits for such a front-heavy car as
> >ours, but if motivation is 'cause they look great... thats cool, go for
it,
> >being a big brake fanatic myself.  But I just couldn't justify the
expense
> >for myself for functional reasons.
> >
> >btdt/background: For hard braking anywhere/track use especially, i
predict
> >the best setup will be to use a brake bias control and defeat almost all
of
> >the BR rear brake's capability. my BTDT is an UrS4 track car with mov'it
> >BR's up front (works great and much better than smaller P-car (968)
brakes
> >that PO put on), and P-car brakes on rear (968) installed by PO, smaller
> >than the 993tt rears, but much bigger than stock UrS rears. When i tried
a
> >few laps set even 1/3 to rear, it was truly scary/dangerous, the car was
> >skittering/jittering all over, very un-nerving, with lots of
quick-steering
> >inputs to keep it semi-straight and ABS helping as much as it could but
not
> >nearly enuf. As soon as i slapped the control back to full-front, the car
> >was rock-solid, much more usable/powerful straight-line braking resulted.
> >I
> >experimented a few more laps doing a-b testing and came to a firm
> >conclusion, at least for that car.
> >
> >Also note the usual pad life (long) of rear pads vs. front pads under
> >street
> >or track condition. My R4S street compound pad lasts a long long time at
> >rear thru street and track use.
> >
> >so my 2cents is... if function is the goal, consider not to do it, save
> >money for a more functional perf upgrade.  If aesthetics is the goal, go
> >for
> >it, but most likely expect to be defeating the rears with a
> >brake-positioning valve for safety reasons.
> >
> >pardon if my 2 cents is obvious, as the reference in Todd's post already
> >says "Some strong words of advice: *-Altering the brake system on your
car
> >may be dangerous, and the front/rear brake ratio should be checked after
> >modifications. A wrong setup results in locking the rear wheels prior of
> >the
> >front wheels which is dangerous. I strongly recommend the installation of
> >an
> >adjustable proportional valve instead of the original one, or at least
> >check
> >the front/rear ratio with the stock valve."
> >
> >Cheers,
> >Leigh
> >street car: '92 UrS4 with...
> >    Front: Mov'It BR's, Porterfield R4 pad for track, Porsche street pad
> >(R1
> >slicks for track)
> >    Rear:Audi stock caliper rear, R4S pad for track or street, 2Bennett
> >drilled rotor (R1 slicks for track)
> >
> >P.S.  note the benefits of <clipped> posting.  I see too many unclipped
> >posts, one reason i participate less than in past years... it gets
tiresome
> >'wearing out my scroll button' going through digest emails looking for
> >msg#n
> >
> >----- Original Message ----- >
> >Message: 1
> > > From: "TODD KRAMER" <toddekramer at msn.com>
> > > To: <CaptMagu at aol.com>
> > > Cc: "s-car-list" <s-car-list at audifans.com>
> > > Date: Sat, 18 Oct 2003 21:04:40 -0600
> > > Subject: [s-cars] Big Red Rear Brakes
> >
> > > Hap,
> > >
> > > Send me the pic/pics.  I too am so close to a big red rear brake
> >solution
> >t=
> > > hat it isn't funny ... I am simply an emergency brake cable away from
> >using=
> > >  the actual RS2 setup with the internal Porsche drums.  The master
> >cylinder=
> > >  capacity is my only concern, but my techs in Germany assure me that
the
> >Ur=
> > > S MC is up to the task.
> > >
> > > My biggest hurdle was the centering disk to keep the 993TT rear rotor
> >prope=
> > > rly centered, but my OZ Futura's have an integrated removable spacer
> >that
> >w=
> > > ill soon be cut to handle the task.
> > >
> > > This old link
> >http://www.s-cars.org/urs4s6/faq/f008/RS2_e-brake/rs2_e-brake=
> > > _4.html has been the inspiration, but I think Joern was using a true
Big
> >Re=
> > > d front caliper in his mod.
> > >
> > > .=2E.and now that I hear the Lincoln LS uses and electronic acutator
on
> >the=
> > > ir e-brake, the cables may no longer be the long pole in this tent.
> > >
> > > Todd Kramer
> > > '95 S6
> >
> >
> >
> >_______________________________________________
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>
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