Proportioning Valves/ Brake Questions

["Brian Haygood" <Scirious@hotmail.com>]

Neal, Randy and others;

How do these Tilton proportioning valves work?  My understanding is that
they use a spring, for which the preload is adjustable, to add a tiny amount
of squishyness to the rear brake lines, so that the front lines react a bit
faster to pedal travel.  It would be analogous to putting stainless lines up
front and leaving rubber lines in the rear, but in a finely tuneable way,
thus giving you control over the ratio.  That about right?

Neal, since our master cylinders, like most, have 4 lines coming out of the
MC, couldn't you just remove one of the rear lines from the MC, and put one
of these proportioning valves in the hole it leaves behind, and then split
the remaining brake line somewhere along its path so that one line services
both rear brakes?  Unless I'm just misunderstanding the whole tandem master
cylinder thing, this should work, right?  If anybody can shoot me down, do
it!

If you wanted that proportioning valve inside the car, you could just run a
new piece of brake line up inside the car and mount the valve on it, instead
of mounting the valve directly onto the MC.  Using flexible line for this
could be very convenient, depending on where you want your valve to end up.

Either this is a good idea, or I am way off base on all of it.

-Brian


----- Original Message -----
From: Neal Tovsen <sixteen.volt@verizon.net>
To: 'Randy B' <sirocco@telocity.com>; <scirocco-l@scirocco.org>
Sent: Friday, November 09, 2001 9:19 AM
Subject: RE: Porsche 944T Master Cylinder on 81 Scirocco MS for 16V brakes.


> OOOhhh. That could be fun!
>
> Is there any way to have an adj. prop. valve on a standard MC? I've been
> kinda wondering about that...
>
> Neal
>
> > -----Original Message-----
> > From: owner-scirocco-l@scirocco.org
> > [mailto:owner-scirocco-l@scirocco.org]On Behalf Of Randy B
> > Sent: Friday, November 09, 2001 12:59 AM
> > To: scirocco-l@scirocco.org
> > Subject: Porsche 944T Master Cylinder on 81 Scirocco MS for
> > 16V brakes.
> >
> >
> >
> > Ya'all been wondering why I am posting so often now????
> > Ok, I have recently been laid off.
> > Idle minds are the hands of......(How did this end?)
> >
> > Anyways while I've been lounging around watchin' soaps and
> > CNN I have also
> > been thinking about future mods. (once I get a job again that is).
> >
> > I have test fit a 944 Porsche Turbo MS to the stock 81
> > Scirocco booster and
> > it is a direct fit.
> > This MS is 23mm for front and 20mm for rear.
> > 2 line outputs for the front and 1 line output for the rear.
> > I hope to run the single line through the firewall to the
> > E-brake location
> > and mount a Tilton adj. proportioning valve (one line in, two
> > line out), and
> > then run the dual lines back to the rear calipers.
> > This MS compared to the 81 Scirocco MS which is 20mm for both.
> > I am going to try this MS with my 16V brakes (currently running stock
> > MS/Booster with 10.1/8.9 with pedal to the floor).
> >
> > I'll let ya'll know how this turns out in a future episode of
> > the Young and
> > the Restless......OOps, damn TV......
> >
> > Randy
> >
> >
> > --
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> >
>
>
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>
>

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