[DeTomaso] Brake question

Sun May 13 19:04:55 EDT 2012

Bling never really was my goal. Not looking crappy was though. I really did
not know what to expect when i removed my stock proportioning valve and
expected a hard time tuning the bias. Turned out it did no good but I
didn't know if it was due to > 12" rear tires or my brakes sucked. This is
the first time they've scared me though.  I've come to the conclusion that
my fronts are not working right and when my backs boiled I had nothing. If
I can ever figure out how to squeeze more than 24 hours out of a day or
less than 60 work hours work a week I may make some progress on the car.
On May 13, 2012 12:05 PM, "Asa Jay Laughton" <asajay at asajay.com> wrote:

> That's a nice looking set up.  I like the idea of the brake pressure
> gauges, though they can't be seen with the lid closed.  Did you find
> they were of any use when making adjustments or did it end up just being
> a piece of bling after it was all done?
>
> Asa Jay
>
> Asa Jay Laughton, MSgt, USAFR, Retired
> &  Shelley Marie
> Spokane, WA
> ******************************
> http://www.racingagainstautism.com
> http://www.teampanteraracing.com
> http://facebook.com/racingagainstautism
>
>
> On 5/13/2012 4:24 AM, Rob Dumoulin wrote:
> > 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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