[DeTomaso] Brake question

Tomas Gunnarsson guson at home.se
Sun May 13 16:29:50 EDT 2012


Thanks Rob! I'd not seen that product before. You did install it with the
prop valve in the front circuit, not the rear like the instructions say?

Tomas
  -----Original Message-----
  From: Rob Dumoulin [mailto:rob at dumoulins.net]
  Sent: den 13 maj 2012 13:24
  To: Tomas Gunnarsson
  Cc: De Tomaso List
  Subject: Re: [DeTomaso] Brake question


  Certainly.


  Below is the link to Summit Racing for the SSBC A0730PL. I got the Chrome
one not the black shown.


  http://www.summitracing.com/parts/SSB-A0730PL/


  Here is a pic of my front trunk as shown on the cardomain site I setup
years ago and haven't updated for a while. I really need to take some
updated pics!  One thing I noticed when redoing the brakes was that the
windshield washer bottle fits nicely tucked under the hood latch. The stock
water squirt hose brackets easily hook up to the firewall and release
bracket and the hose length is perfect for that position.


  http://www.cardomain.com/ride/3341642/1971-detomaso-pantera/page-5





  On Sun, May 13, 2012 at 6:40 AM, Tomas Gunnarsson <guson at home.se> wrote:

    Please share what part # and brand that is Rob.

    Tomas


    -----Original Message-----
    From: detomaso-bounces at realbig.com
    [mailto:detomaso-bounces at realbig.com]On Behalf Of Rob Dumoulin
    Sent: den 13 maj 2012 11:46
    To: Julian Kift
    Cc: De Tomaso List; pantdino at aol.com; jb841 at cox.net
    Subject: Re: [DeTomaso] Brake question



    The front and rear are isolated within the adjustable (modern and much
    smaller) proportioning valve which also has a brake light switch built
in.
    On May 13, 2012 12:15 AM, "Julian Kift" <julian_kift at hotmail.com> wrote:

    >  That is exactly why I am asking, I think generally for the new owner
    > there might be some confusion out there over the 'shuttle' and
    > 'proportioning' valves and someone might be tempted to 'gut' the
shuttle
    > valve instead of the proportioning valve. That would be bad as it
connects
    > all brake lines a singular system, but might explain why Rob lost all
    pedal
    > when the fluid boiled.
    >
    > Julian
    >

    > ------------------------------

    > To: julian_kift at hotmail.com; rob at dumoulins.net; jb841 at cox.net
    > Subject: Re: [DeTomaso] Brake question
    > From: pantdino at aol.com
    > CC: detomaso at realbig.com
    > Date: Sat, 12 May 2012 23:48:06 -0400
    >
    > The only purpose of a shuttle valve is to trigger the brake warning
light.
    > It's not really a valve.
    > If it is removed the front line going into it should be connected to
the
    > front line exiting it and rear to rear, as if the thing never existed.
    >
    > If someone mistakenly puts a T fitting in or fiddles the shuttle to
make
    > it act like one, you no longer have separation of the front and rear
    > braking systems and a leak anywhere will result in no brakes at all.
    >
    >
    >  -----Original Message-----
    > From: Julian Kift <julian_kift at hotmail.com>
    > To: rob <rob at dumoulins.net>; jb841 <jb841 at cox.net>
    > Cc: De Tomaso List <detomaso at realbig.com>
    > Sent: Sat, May 12, 2012 8:32 pm
    > Subject: Re: [DeTomaso] Brake question
    >
    >
    > I'm trying to picture how you brakes are plumbed, normally a
proportioning
    valve
    > is in a singular line (typically rear, but stock on the Pantera is
front)
    adn it
    > limits the flow in that line.
    >
    > When the shuttle valve was removed how were the lines connected
together?
    >
    > Julian
    >
    > > Date: Sat, 12 May 2012 20:53:36 -0400
    > > From: rob at dumoulins.net
    > > To: jb841 at cox.net
    > > CC: detomaso at realbig.com
    > > Subject: Re: [DeTomaso] Brake question
    > >
    > > Shuttle valve is removed. Circuits isolated with a modern
proportioning
    > > valve.
    > > On May 12, 2012 1:16 PM, "John Buckman" <jb841 at cox.net> wrote:
    > >
    > > > >>>I no longer have the shuttle valve installed, it that matters.
    > > >
    > > >
    > > > Rob,
    > > >
    > > > The shuttle valve also incorporates the brake light switch.  If
the
    > > > shuttle valve were removed,
    > > > the brake light switch would have to be plumbed back into the
    hydraulic
    > > > line or a mechanical
    > > > switch would need to be added to the brake pedal.
    > > >
    > > > If the shuttle valve were removed, and the brake lines were all
    connected
    > > > together instead of
    > > > "splitting" the hydraulic system (which is what the shuttle valve
    "block"
    > > > does), then any problem
    > > > in the hydraulic system (boiling of fluid or loss of fluid due to
a
    leak)
    > > > would affect all four corners
    > > > of the car, and would cause the brake pedal to go to the floor.
    > > >
    > > > John
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