PROPORTIONING VALVES on 16v

[tofunit at yahoo.com (toFUNit@yahoo.com)]

Very interesting... Talking about braking stuff, I always have to add some
brake fluid to the container, and I could not find the way where the fluid goes
out? Everything is dry around the container/valve/etc. so I don't suspend
losing any brake fluid there... I did bleed all brakes, and nothing seems to
leak around that either... Any cue about what to check, could this be a leak
inside the master cylinder?

thx,
Joel

--- Allyn <amalventano@sc.rr.com> wrote:
> the numbers are actually different than that. the brake cylinders are
> different diameter front/rear, and the brake rotors are different diameters
> front/rear, so the prop valves may not be doing a perfect 70/30 split in
> hydraulic pressure, they just do the correct split (whatever that may be) so
> the end result at the wheels is the desired split in braking force.
> also, prop valves are set up considering the car is in a braking condition,
> so this weight distribution turns into something like 85/15 or 90/10 (in
> extreme cases), as weight shifts from rear to front as you brake.
> Al
> 
> ----- Original Message ----- 
> From: "toFUNit@yahoo.com" <tofunit@yahoo.com>
> To: <scirocco-l@scirocco.org>
> Sent: Wednesday, July 16, 2003 12:11 PM
> Subject: RE: PROPORTIONING VALVES on 16v
> 
> 
> > To respect the ratio 70% front - 30% rear?
> >
> >
> > --- ATS - Patrick Bureau <txrocco@sbcglobal.net> wrote:
> > > the proportioning valves are to limit the amoutn of pressure sent in
> rapport
> > > to the front in variation to the amount of pressure applied to the brake
> > > pedals, to limit the amount of pressure sent towards the rear, thus
> > > preventing wheel lock up and keeping the braking ration to oem specs .
> > >
> > > ATS - Patrick Bureau - txrocco@sbcglobal.net
> > > ----------------------------------------------
> > > MSN:ATSGTX@hotmail.com |YAHOO:ATSGTX@yahoo.com
> > > ICQ:32918816           |AIM:Texasscirocco
> > > ----------------------------------------------
> > >
> > >
> > > =>-----Original Message-----
> > > =>From: scirocco-l-bounces@scirocco.org
> > > =>[mailto:scirocco-l-bounces@scirocco.org]On Behalf Of Drew MacPherson
> > > =>Sent: Wednesday, July 16, 2003 9:51 AM
> > > =>To: Anson Clement
> > > =>Cc: scirocco-l@scirocco.org
> > > =>Subject: Re: PROPORTIONING VALVES on 16v
> > > =>
> > > =>
> > > =>
> > > =>Bollocks...!! :)
> > > =>
> > > =>On the Mk2 Scirocco ETKA calls the vlaves on the 8V and 16V brake
> pressure
> > > =>regulators (pressure sensitive.)  Early A2 Golfs are called "load
> > > =>sensitive"  pressure regulators.   Late Golfs and all A2 (and A3 etc.)
> > > =>Jettas have load sensitive pressure regulators that are tied to the
> rear
> > > =>axle beam and vary rear brake pressure based on weight on the rear
> axle.
> > > =>
> > > =>Rear brake shoes on our cars are self adjusting - there's a spring
> loaded
> > > =>wedge in the linkage that keeps the brake lining an optimal distance
> from
> > > =>the drum at all times.
> > > =>
> > > =>So, as much as I'd like to believe it, Anson, I don't think it's
> > > =>true...:)
> > > =>The 8V valves are pressure limiting the same as the 16V ones are, only
> > > =>allowing (probably more) pressure through.
> > > =>
> > > =>That's my story, and I'm sticking to it.
> > > =>
> > > =>Drew
> > > =>
> > > =>On Wed, 16 Jul 2003, Anson Clement wrote:
> > > =>
> > > =>> To the best of my knowledge the "proportioning valves" mounted on an
> > > =>> 8v's master cyl are actualy some sort of check valve. The porpose of
> > > =>> these wee little bundles of joy is said to be keeping good pedal
> > > =>> feel/preventing the shoes from retracting too far from the drum.
> > > =>>
> > > =>> correct/slap me if I'm wrong :)
> > > =>>
> > > =>> Anson
> > > =>>
> > > =>
> > > =>--
> > > =>/=============================================\
> > > =>|  84 Wolfsburg Edition TurboDiesel Scirocco  |
> > > =>|    http://scirocco.cs.uoguelph.ca/gtd       |
> > > =>\=============================================/
> > > =>
> > > =>
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